hotspot/src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp
author iveresov
Wed, 11 Jun 2008 05:12:19 -0700
changeset 1375 60436e77fafa
parent 1374 4c24294029a9
child 1384 163a4d4fa951
permissions -rw-r--r--
6710665: G1: guarantee(_cm->out_of_regions() && _cm->region_stack_empty() && _task_queue->size() == 0, ...) Summary: Remove the incorrect assumptions from guarantee()s. Reviewed-by: ysr, tonyp
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/*
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 * Copyright 2001-2007 Sun Microsystems, Inc.  All Rights Reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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 * CA 95054 USA or visit www.sun.com if you need additional information or
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 * have any questions.
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 *
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 */
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#include "incls/_precompiled.incl"
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#include "incls/_g1CollectedHeap.cpp.incl"
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// turn it on so that the contents of the young list (scan-only /
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// to-be-collected) are printed at "strategic" points before / during
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// / after the collection --- this is useful for debugging
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#define SCAN_ONLY_VERBOSE 0
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// CURRENT STATUS
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// This file is under construction.  Search for "FIXME".
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// INVARIANTS/NOTES
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//
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// All allocation activity covered by the G1CollectedHeap interface is
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//   serialized by acquiring the HeapLock.  This happens in
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//   mem_allocate_work, which all such allocation functions call.
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//   (Note that this does not apply to TLAB allocation, which is not part
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//   of this interface: it is done by clients of this interface.)
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// Local to this file.
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// Finds the first HeapRegion.
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// No longer used, but might be handy someday.
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class FindFirstRegionClosure: public HeapRegionClosure {
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  HeapRegion* _a_region;
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public:
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  FindFirstRegionClosure() : _a_region(NULL) {}
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  bool doHeapRegion(HeapRegion* r) {
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    _a_region = r;
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    return true;
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  }
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  HeapRegion* result() { return _a_region; }
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};
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class RefineCardTableEntryClosure: public CardTableEntryClosure {
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  SuspendibleThreadSet* _sts;
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  G1RemSet* _g1rs;
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  ConcurrentG1Refine* _cg1r;
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  bool _concurrent;
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public:
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  RefineCardTableEntryClosure(SuspendibleThreadSet* sts,
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                              G1RemSet* g1rs,
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                              ConcurrentG1Refine* cg1r) :
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    _sts(sts), _g1rs(g1rs), _cg1r(cg1r), _concurrent(true)
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  {}
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  bool do_card_ptr(jbyte* card_ptr, int worker_i) {
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    _g1rs->concurrentRefineOneCard(card_ptr, worker_i);
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    if (_concurrent && _sts->should_yield()) {
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      // Caller will actually yield.
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      return false;
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    }
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    // Otherwise, we finished successfully; return true.
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    return true;
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  }
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  void set_concurrent(bool b) { _concurrent = b; }
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};
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class ClearLoggedCardTableEntryClosure: public CardTableEntryClosure {
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  int _calls;
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  G1CollectedHeap* _g1h;
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  CardTableModRefBS* _ctbs;
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  int _histo[256];
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public:
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  ClearLoggedCardTableEntryClosure() :
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    _calls(0)
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  {
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    _g1h = G1CollectedHeap::heap();
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    _ctbs = (CardTableModRefBS*)_g1h->barrier_set();
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    for (int i = 0; i < 256; i++) _histo[i] = 0;
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  }
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  bool do_card_ptr(jbyte* card_ptr, int worker_i) {
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    if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) {
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      _calls++;
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      unsigned char* ujb = (unsigned char*)card_ptr;
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      int ind = (int)(*ujb);
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      _histo[ind]++;
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      *card_ptr = -1;
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    }
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    return true;
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  }
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  int calls() { return _calls; }
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  void print_histo() {
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    gclog_or_tty->print_cr("Card table value histogram:");
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    for (int i = 0; i < 256; i++) {
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      if (_histo[i] != 0) {
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        gclog_or_tty->print_cr("  %d: %d", i, _histo[i]);
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      }
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    }
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  }
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};
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class RedirtyLoggedCardTableEntryClosure: public CardTableEntryClosure {
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  int _calls;
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  G1CollectedHeap* _g1h;
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  CardTableModRefBS* _ctbs;
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public:
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  RedirtyLoggedCardTableEntryClosure() :
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    _calls(0)
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  {
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    _g1h = G1CollectedHeap::heap();
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    _ctbs = (CardTableModRefBS*)_g1h->barrier_set();
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  }
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  bool do_card_ptr(jbyte* card_ptr, int worker_i) {
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    if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) {
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      _calls++;
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      *card_ptr = 0;
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    }
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    return true;
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  }
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  int calls() { return _calls; }
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};
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YoungList::YoungList(G1CollectedHeap* g1h)
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  : _g1h(g1h), _head(NULL),
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    _scan_only_head(NULL), _scan_only_tail(NULL), _curr_scan_only(NULL),
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    _length(0), _scan_only_length(0),
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    _last_sampled_rs_lengths(0),
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    _survivor_head(NULL), _survivors_tail(NULL), _survivor_length(0)
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{
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  guarantee( check_list_empty(false), "just making sure..." );
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}
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void YoungList::push_region(HeapRegion *hr) {
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  assert(!hr->is_young(), "should not already be young");
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  assert(hr->get_next_young_region() == NULL, "cause it should!");
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  hr->set_next_young_region(_head);
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  _head = hr;
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  hr->set_young();
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  double yg_surv_rate = _g1h->g1_policy()->predict_yg_surv_rate((int)_length);
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  ++_length;
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}
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void YoungList::add_survivor_region(HeapRegion* hr) {
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  assert(!hr->is_survivor(), "should not already be for survived");
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  assert(hr->get_next_young_region() == NULL, "cause it should!");
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  hr->set_next_young_region(_survivor_head);
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  if (_survivor_head == NULL) {
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    _survivors_tail = hr;
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  }
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  _survivor_head = hr;
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  hr->set_survivor();
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  ++_survivor_length;
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}
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HeapRegion* YoungList::pop_region() {
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  while (_head != NULL) {
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    assert( length() > 0, "list should not be empty" );
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    HeapRegion* ret = _head;
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    _head = ret->get_next_young_region();
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    ret->set_next_young_region(NULL);
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    --_length;
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    assert(ret->is_young(), "region should be very young");
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    // Replace 'Survivor' region type with 'Young'. So the region will
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    // be treated as a young region and will not be 'confused' with
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    // newly created survivor regions.
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    if (ret->is_survivor()) {
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      ret->set_young();
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    }
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    if (!ret->is_scan_only()) {
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      return ret;
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    }
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    // scan-only, we'll add it to the scan-only list
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    if (_scan_only_tail == NULL) {
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      guarantee( _scan_only_head == NULL, "invariant" );
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      _scan_only_head = ret;
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      _curr_scan_only = ret;
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    } else {
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      guarantee( _scan_only_head != NULL, "invariant" );
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      _scan_only_tail->set_next_young_region(ret);
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    }
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    guarantee( ret->get_next_young_region() == NULL, "invariant" );
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    _scan_only_tail = ret;
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    // no need to be tagged as scan-only any more
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    ret->set_young();
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    ++_scan_only_length;
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  }
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  assert( length() == 0, "list should be empty" );
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  return NULL;
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}
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void YoungList::empty_list(HeapRegion* list) {
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  while (list != NULL) {
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    HeapRegion* next = list->get_next_young_region();
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    list->set_next_young_region(NULL);
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    list->uninstall_surv_rate_group();
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    list->set_not_young();
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    list = next;
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  }
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}
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void YoungList::empty_list() {
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  assert(check_list_well_formed(), "young list should be well formed");
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  empty_list(_head);
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  _head = NULL;
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  _length = 0;
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  empty_list(_scan_only_head);
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  _scan_only_head = NULL;
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  _scan_only_tail = NULL;
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  _scan_only_length = 0;
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  _curr_scan_only = NULL;
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  empty_list(_survivor_head);
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  _survivor_head = NULL;
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  _survivors_tail = NULL;
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  _survivor_length = 0;
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  _last_sampled_rs_lengths = 0;
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  assert(check_list_empty(false), "just making sure...");
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}
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bool YoungList::check_list_well_formed() {
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  bool ret = true;
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  size_t length = 0;
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  HeapRegion* curr = _head;
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  HeapRegion* last = NULL;
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  while (curr != NULL) {
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    if (!curr->is_young() || curr->is_scan_only()) {
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      gclog_or_tty->print_cr("### YOUNG REGION "PTR_FORMAT"-"PTR_FORMAT" "
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                             "incorrectly tagged (%d, %d)",
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                             curr->bottom(), curr->end(),
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                             curr->is_young(), curr->is_scan_only());
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      ret = false;
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    }
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    ++length;
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    last = curr;
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    curr = curr->get_next_young_region();
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  }
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  ret = ret && (length == _length);
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  if (!ret) {
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    gclog_or_tty->print_cr("### YOUNG LIST seems not well formed!");
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    gclog_or_tty->print_cr("###   list has %d entries, _length is %d",
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                           length, _length);
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  }
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  bool scan_only_ret = true;
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  length = 0;
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  curr = _scan_only_head;
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  last = NULL;
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  while (curr != NULL) {
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    if (!curr->is_young() || curr->is_scan_only()) {
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      gclog_or_tty->print_cr("### SCAN-ONLY REGION "PTR_FORMAT"-"PTR_FORMAT" "
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                             "incorrectly tagged (%d, %d)",
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                             curr->bottom(), curr->end(),
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                             curr->is_young(), curr->is_scan_only());
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      scan_only_ret = false;
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    }
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    ++length;
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    last = curr;
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    curr = curr->get_next_young_region();
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  }
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  scan_only_ret = scan_only_ret && (length == _scan_only_length);
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  if ( (last != _scan_only_tail) ||
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       (_scan_only_head == NULL && _scan_only_tail != NULL) ||
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       (_scan_only_head != NULL && _scan_only_tail == NULL) ) {
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     gclog_or_tty->print_cr("## _scan_only_tail is set incorrectly");
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     scan_only_ret = false;
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  }
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  if (_curr_scan_only != NULL && _curr_scan_only != _scan_only_head) {
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    gclog_or_tty->print_cr("### _curr_scan_only is set incorrectly");
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    scan_only_ret = false;
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   }
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  if (!scan_only_ret) {
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    gclog_or_tty->print_cr("### SCAN-ONLY LIST seems not well formed!");
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    gclog_or_tty->print_cr("###   list has %d entries, _scan_only_length is %d",
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                  length, _scan_only_length);
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  }
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  return ret && scan_only_ret;
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}
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bool YoungList::check_list_empty(bool ignore_scan_only_list,
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                                 bool check_sample) {
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  bool ret = true;
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   318
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   319
  if (_length != 0) {
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   320
    gclog_or_tty->print_cr("### YOUNG LIST should have 0 length, not %d",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   321
                  _length);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   322
    ret = false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   323
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   324
  if (check_sample && _last_sampled_rs_lengths != 0) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   325
    gclog_or_tty->print_cr("### YOUNG LIST has non-zero last sampled RS lengths");
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   326
    ret = false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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diff changeset
   327
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   328
  if (_head != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   329
    gclog_or_tty->print_cr("### YOUNG LIST does not have a NULL head");
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   330
    ret = false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
   331
  }
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diff changeset
   332
  if (!ret) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   333
    gclog_or_tty->print_cr("### YOUNG LIST does not seem empty");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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diff changeset
   334
  }
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diff changeset
   335
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   336
  if (ignore_scan_only_list)
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   337
    return ret;
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parents:
diff changeset
   338
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   339
  bool scan_only_ret = true;
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   340
  if (_scan_only_length != 0) {
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   341
    gclog_or_tty->print_cr("### SCAN-ONLY LIST should have 0 length, not %d",
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   342
                  _scan_only_length);
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   343
    scan_only_ret = false;
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diff changeset
   344
  }
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diff changeset
   345
  if (_scan_only_head != NULL) {
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   346
    gclog_or_tty->print_cr("### SCAN-ONLY LIST does not have a NULL head");
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   347
     scan_only_ret = false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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diff changeset
   348
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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diff changeset
   349
  if (_scan_only_tail != NULL) {
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   350
    gclog_or_tty->print_cr("### SCAN-ONLY LIST does not have a NULL tail");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   351
    scan_only_ret = false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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diff changeset
   352
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
   353
  if (!scan_only_ret) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   354
    gclog_or_tty->print_cr("### SCAN-ONLY LIST does not seem empty");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   355
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
   356
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   357
  return ret && scan_only_ret;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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diff changeset
   358
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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diff changeset
   359
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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diff changeset
   360
void
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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diff changeset
   361
YoungList::rs_length_sampling_init() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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diff changeset
   362
  _sampled_rs_lengths = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   363
  _curr               = _head;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
   364
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   365
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
   366
bool
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
   367
YoungList::rs_length_sampling_more() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
   368
  return _curr != NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
   369
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
   370
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   371
void
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
   372
YoungList::rs_length_sampling_next() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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diff changeset
   373
  assert( _curr != NULL, "invariant" );
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   374
  _sampled_rs_lengths += _curr->rem_set()->occupied();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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diff changeset
   375
  _curr = _curr->get_next_young_region();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   376
  if (_curr == NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
   377
    _last_sampled_rs_lengths = _sampled_rs_lengths;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
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   378
    // gclog_or_tty->print_cr("last sampled RS lengths = %d", _last_sampled_rs_lengths);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
   379
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   380
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   381
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
   382
void
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
   383
YoungList::reset_auxilary_lists() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   384
  // We could have just "moved" the scan-only list to the young list.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   385
  // However, the scan-only list is ordered according to the region
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   386
  // age in descending order, so, by moving one entry at a time, we
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   387
  // ensure that it is recreated in ascending order.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   388
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
   389
  guarantee( is_empty(), "young list should be empty" );
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   390
  assert(check_list_well_formed(), "young list should be well formed");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   391
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
   392
  // Add survivor regions to SurvRateGroup.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   393
  _g1h->g1_policy()->note_start_adding_survivor_regions();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
   394
  for (HeapRegion* curr = _survivor_head;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
   395
       curr != NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
   396
       curr = curr->get_next_young_region()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
   397
    _g1h->g1_policy()->set_region_survivors(curr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   398
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   399
  _g1h->g1_policy()->note_stop_adding_survivor_regions();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   400
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   401
  if (_survivor_head != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   402
    _head           = _survivor_head;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   403
    _length         = _survivor_length + _scan_only_length;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   404
    _survivors_tail->set_next_young_region(_scan_only_head);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   405
  } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   406
    _head           = _scan_only_head;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   407
    _length         = _scan_only_length;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   408
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   409
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   410
  for (HeapRegion* curr = _scan_only_head;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   411
       curr != NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   412
       curr = curr->get_next_young_region()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   413
    curr->recalculate_age_in_surv_rate_group();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   414
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   415
  _scan_only_head   = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   416
  _scan_only_tail   = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   417
  _scan_only_length = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   418
  _curr_scan_only   = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   419
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   420
  _survivor_head    = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   421
  _survivors_tail   = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   422
  _survivor_length  = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   423
  _g1h->g1_policy()->finished_recalculating_age_indexes();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   424
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   425
  assert(check_list_well_formed(), "young list should be well formed");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   426
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   427
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   428
void YoungList::print() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   429
  HeapRegion* lists[] = {_head,   _scan_only_head, _survivor_head};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   430
  const char* names[] = {"YOUNG", "SCAN-ONLY",     "SURVIVOR"};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   431
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   432
  for (unsigned int list = 0; list < ARRAY_SIZE(lists); ++list) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   433
    gclog_or_tty->print_cr("%s LIST CONTENTS", names[list]);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   434
    HeapRegion *curr = lists[list];
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   435
    if (curr == NULL)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   436
      gclog_or_tty->print_cr("  empty");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   437
    while (curr != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   438
      gclog_or_tty->print_cr("  [%08x-%08x], t: %08x, P: %08x, N: %08x, C: %08x, "
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   439
                             "age: %4d, y: %d, s-o: %d, surv: %d",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   440
                             curr->bottom(), curr->end(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   441
                             curr->top(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   442
                             curr->prev_top_at_mark_start(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   443
                             curr->next_top_at_mark_start(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   444
                             curr->top_at_conc_mark_count(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   445
                             curr->age_in_surv_rate_group_cond(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   446
                             curr->is_young(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   447
                             curr->is_scan_only(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   448
                             curr->is_survivor());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   449
      curr = curr->get_next_young_region();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   450
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   451
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   452
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   453
  gclog_or_tty->print_cr("");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   454
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   455
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   456
void G1CollectedHeap::stop_conc_gc_threads() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   457
  _cg1r->cg1rThread()->stop();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   458
  _czft->stop();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   459
  _cmThread->stop();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   460
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   461
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   462
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   463
void G1CollectedHeap::check_ct_logs_at_safepoint() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   464
  DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   465
  CardTableModRefBS* ct_bs = (CardTableModRefBS*)barrier_set();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   466
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   467
  // Count the dirty cards at the start.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   468
  CountNonCleanMemRegionClosure count1(this);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   469
  ct_bs->mod_card_iterate(&count1);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   470
  int orig_count = count1.n();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   471
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   472
  // First clear the logged cards.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   473
  ClearLoggedCardTableEntryClosure clear;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   474
  dcqs.set_closure(&clear);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   475
  dcqs.apply_closure_to_all_completed_buffers();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   476
  dcqs.iterate_closure_all_threads(false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   477
  clear.print_histo();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   478
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   479
  // Now ensure that there's no dirty cards.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   480
  CountNonCleanMemRegionClosure count2(this);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   481
  ct_bs->mod_card_iterate(&count2);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   482
  if (count2.n() != 0) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   483
    gclog_or_tty->print_cr("Card table has %d entries; %d originally",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   484
                           count2.n(), orig_count);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   485
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   486
  guarantee(count2.n() == 0, "Card table should be clean.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   487
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   488
  RedirtyLoggedCardTableEntryClosure redirty;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   489
  JavaThread::dirty_card_queue_set().set_closure(&redirty);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   490
  dcqs.apply_closure_to_all_completed_buffers();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   491
  dcqs.iterate_closure_all_threads(false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   492
  gclog_or_tty->print_cr("Log entries = %d, dirty cards = %d.",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   493
                         clear.calls(), orig_count);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   494
  guarantee(redirty.calls() == clear.calls(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   495
            "Or else mechanism is broken.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   496
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   497
  CountNonCleanMemRegionClosure count3(this);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   498
  ct_bs->mod_card_iterate(&count3);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   499
  if (count3.n() != orig_count) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   500
    gclog_or_tty->print_cr("Should have restored them all: orig = %d, final = %d.",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   501
                           orig_count, count3.n());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   502
    guarantee(count3.n() >= orig_count, "Should have restored them all.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   503
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   504
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   505
  JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   506
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   507
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   508
// Private class members.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   509
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   510
G1CollectedHeap* G1CollectedHeap::_g1h;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   511
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   512
// Private methods.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   513
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   514
// Finds a HeapRegion that can be used to allocate a given size of block.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   515
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   516
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   517
HeapRegion* G1CollectedHeap::newAllocRegion_work(size_t word_size,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   518
                                                 bool do_expand,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   519
                                                 bool zero_filled) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   520
  ConcurrentZFThread::note_region_alloc();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   521
  HeapRegion* res = alloc_free_region_from_lists(zero_filled);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   522
  if (res == NULL && do_expand) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   523
    expand(word_size * HeapWordSize);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   524
    res = alloc_free_region_from_lists(zero_filled);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   525
    assert(res == NULL ||
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   526
           (!res->isHumongous() &&
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   527
            (!zero_filled ||
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   528
             res->zero_fill_state() == HeapRegion::Allocated)),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   529
           "Alloc Regions must be zero filled (and non-H)");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   530
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   531
  if (res != NULL && res->is_empty()) _free_regions--;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   532
  assert(res == NULL ||
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   533
         (!res->isHumongous() &&
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   534
          (!zero_filled ||
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   535
           res->zero_fill_state() == HeapRegion::Allocated)),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   536
         "Non-young alloc Regions must be zero filled (and non-H)");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   537
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   538
  if (G1TraceRegions) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   539
    if (res != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   540
      gclog_or_tty->print_cr("new alloc region %d:["PTR_FORMAT", "PTR_FORMAT"], "
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   541
                             "top "PTR_FORMAT,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   542
                             res->hrs_index(), res->bottom(), res->end(), res->top());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   543
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   544
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   545
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   546
  return res;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   547
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   548
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   549
HeapRegion* G1CollectedHeap::newAllocRegionWithExpansion(int purpose,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   550
                                                         size_t word_size,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   551
                                                         bool zero_filled) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   552
  HeapRegion* alloc_region = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   553
  if (_gc_alloc_region_counts[purpose] < g1_policy()->max_regions(purpose)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   554
    alloc_region = newAllocRegion_work(word_size, true, zero_filled);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   555
    if (purpose == GCAllocForSurvived && alloc_region != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   556
      _young_list->add_survivor_region(alloc_region);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   557
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   558
    ++_gc_alloc_region_counts[purpose];
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   559
  } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   560
    g1_policy()->note_alloc_region_limit_reached(purpose);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   561
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   562
  return alloc_region;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   563
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   564
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   565
// If could fit into free regions w/o expansion, try.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   566
// Otherwise, if can expand, do so.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   567
// Otherwise, if using ex regions might help, try with ex given back.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   568
HeapWord* G1CollectedHeap::humongousObjAllocate(size_t word_size) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   569
  assert(regions_accounted_for(), "Region leakage!");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   570
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   571
  // We can't allocate H regions while cleanupComplete is running, since
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   572
  // some of the regions we find to be empty might not yet be added to the
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   573
  // unclean list.  (If we're already at a safepoint, this call is
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   574
  // unnecessary, not to mention wrong.)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   575
  if (!SafepointSynchronize::is_at_safepoint())
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   576
    wait_for_cleanup_complete();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   577
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   578
  size_t num_regions =
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   579
    round_to(word_size, HeapRegion::GrainWords) / HeapRegion::GrainWords;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   580
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   581
  // Special case if < one region???
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   582
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   583
  // Remember the ft size.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   584
  size_t x_size = expansion_regions();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   585
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   586
  HeapWord* res = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   587
  bool eliminated_allocated_from_lists = false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   588
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   589
  // Can the allocation potentially fit in the free regions?
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   590
  if (free_regions() >= num_regions) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   591
    res = _hrs->obj_allocate(word_size);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   592
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   593
  if (res == NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   594
    // Try expansion.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   595
    size_t fs = _hrs->free_suffix();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   596
    if (fs + x_size >= num_regions) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   597
      expand((num_regions - fs) * HeapRegion::GrainBytes);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   598
      res = _hrs->obj_allocate(word_size);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   599
      assert(res != NULL, "This should have worked.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   600
    } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   601
      // Expansion won't help.  Are there enough free regions if we get rid
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   602
      // of reservations?
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   603
      size_t avail = free_regions();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   604
      if (avail >= num_regions) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   605
        res = _hrs->obj_allocate(word_size);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   606
        if (res != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   607
          remove_allocated_regions_from_lists();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   608
          eliminated_allocated_from_lists = true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   609
        }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   610
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   611
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   612
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   613
  if (res != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   614
    // Increment by the number of regions allocated.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   615
    // FIXME: Assumes regions all of size GrainBytes.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   616
#ifndef PRODUCT
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   617
    mr_bs()->verify_clean_region(MemRegion(res, res + num_regions *
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   618
                                           HeapRegion::GrainWords));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   619
#endif
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   620
    if (!eliminated_allocated_from_lists)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   621
      remove_allocated_regions_from_lists();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   622
    _summary_bytes_used += word_size * HeapWordSize;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   623
    _free_regions -= num_regions;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   624
    _num_humongous_regions += (int) num_regions;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   625
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   626
  assert(regions_accounted_for(), "Region Leakage");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   627
  return res;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   628
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   629
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   630
HeapWord*
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   631
G1CollectedHeap::attempt_allocation_slow(size_t word_size,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   632
                                         bool permit_collection_pause) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   633
  HeapWord* res = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   634
  HeapRegion* allocated_young_region = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   635
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   636
  assert( SafepointSynchronize::is_at_safepoint() ||
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   637
          Heap_lock->owned_by_self(), "pre condition of the call" );
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   638
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   639
  if (isHumongous(word_size)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   640
    // Allocation of a humongous object can, in a sense, complete a
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   641
    // partial region, if the previous alloc was also humongous, and
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   642
    // caused the test below to succeed.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   643
    if (permit_collection_pause)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   644
      do_collection_pause_if_appropriate(word_size);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   645
    res = humongousObjAllocate(word_size);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   646
    assert(_cur_alloc_region == NULL
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   647
           || !_cur_alloc_region->isHumongous(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   648
           "Prevent a regression of this bug.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   649
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   650
  } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   651
    // If we do a collection pause, this will be reset to a non-NULL
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   652
    // value.  If we don't, nulling here ensures that we allocate a new
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   653
    // region below.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   654
    if (_cur_alloc_region != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   655
      // We're finished with the _cur_alloc_region.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   656
      _summary_bytes_used += _cur_alloc_region->used();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   657
      _cur_alloc_region = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   658
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   659
    assert(_cur_alloc_region == NULL, "Invariant.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   660
    // Completion of a heap region is perhaps a good point at which to do
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   661
    // a collection pause.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   662
    if (permit_collection_pause)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   663
      do_collection_pause_if_appropriate(word_size);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   664
    // Make sure we have an allocation region available.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   665
    if (_cur_alloc_region == NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   666
      if (!SafepointSynchronize::is_at_safepoint())
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   667
        wait_for_cleanup_complete();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   668
      bool next_is_young = should_set_young_locked();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   669
      // If the next region is not young, make sure it's zero-filled.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   670
      _cur_alloc_region = newAllocRegion(word_size, !next_is_young);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   671
      if (_cur_alloc_region != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   672
        _summary_bytes_used -= _cur_alloc_region->used();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   673
        if (next_is_young) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   674
          set_region_short_lived_locked(_cur_alloc_region);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   675
          allocated_young_region = _cur_alloc_region;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   676
        }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   677
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   678
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   679
    assert(_cur_alloc_region == NULL || !_cur_alloc_region->isHumongous(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   680
           "Prevent a regression of this bug.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   681
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   682
    // Now retry the allocation.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   683
    if (_cur_alloc_region != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   684
      res = _cur_alloc_region->allocate(word_size);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   685
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   686
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   687
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   688
  // NOTE: fails frequently in PRT
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   689
  assert(regions_accounted_for(), "Region leakage!");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   690
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   691
  if (res != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   692
    if (!SafepointSynchronize::is_at_safepoint()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   693
      assert( permit_collection_pause, "invariant" );
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   694
      assert( Heap_lock->owned_by_self(), "invariant" );
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   695
      Heap_lock->unlock();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   696
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   697
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   698
    if (allocated_young_region != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   699
      HeapRegion* hr = allocated_young_region;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   700
      HeapWord* bottom = hr->bottom();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   701
      HeapWord* end = hr->end();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   702
      MemRegion mr(bottom, end);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   703
      ((CardTableModRefBS*)_g1h->barrier_set())->dirty(mr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   704
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   705
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   706
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   707
  assert( SafepointSynchronize::is_at_safepoint() ||
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   708
          (res == NULL && Heap_lock->owned_by_self()) ||
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   709
          (res != NULL && !Heap_lock->owned_by_self()),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   710
          "post condition of the call" );
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   711
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   712
  return res;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   713
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   714
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   715
HeapWord*
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   716
G1CollectedHeap::mem_allocate(size_t word_size,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   717
                              bool   is_noref,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   718
                              bool   is_tlab,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   719
                              bool* gc_overhead_limit_was_exceeded) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   720
  debug_only(check_for_valid_allocation_state());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   721
  assert(no_gc_in_progress(), "Allocation during gc not allowed");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   722
  HeapWord* result = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   723
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   724
  // Loop until the allocation is satisified,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   725
  // or unsatisfied after GC.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   726
  for (int try_count = 1; /* return or throw */; try_count += 1) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   727
    int gc_count_before;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   728
    {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   729
      Heap_lock->lock();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   730
      result = attempt_allocation(word_size);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   731
      if (result != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   732
        // attempt_allocation should have unlocked the heap lock
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   733
        assert(is_in(result), "result not in heap");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   734
        return result;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   735
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   736
      // Read the gc count while the heap lock is held.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   737
      gc_count_before = SharedHeap::heap()->total_collections();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   738
      Heap_lock->unlock();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   739
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   740
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   741
    // Create the garbage collection operation...
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   742
    VM_G1CollectForAllocation op(word_size,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   743
                                 gc_count_before);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   744
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   745
    // ...and get the VM thread to execute it.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   746
    VMThread::execute(&op);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   747
    if (op.prologue_succeeded()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   748
      result = op.result();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   749
      assert(result == NULL || is_in(result), "result not in heap");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   750
      return result;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   751
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   752
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   753
    // Give a warning if we seem to be looping forever.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   754
    if ((QueuedAllocationWarningCount > 0) &&
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   755
        (try_count % QueuedAllocationWarningCount == 0)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   756
      warning("G1CollectedHeap::mem_allocate_work retries %d times",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   757
              try_count);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   758
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   759
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   760
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   761
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   762
void G1CollectedHeap::abandon_cur_alloc_region() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   763
  if (_cur_alloc_region != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   764
    // We're finished with the _cur_alloc_region.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   765
    if (_cur_alloc_region->is_empty()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   766
      _free_regions++;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   767
      free_region(_cur_alloc_region);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   768
    } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   769
      _summary_bytes_used += _cur_alloc_region->used();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   770
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   771
    _cur_alloc_region = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   772
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   773
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   774
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   775
class PostMCRemSetClearClosure: public HeapRegionClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   776
  ModRefBarrierSet* _mr_bs;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   777
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   778
  PostMCRemSetClearClosure(ModRefBarrierSet* mr_bs) : _mr_bs(mr_bs) {}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   779
  bool doHeapRegion(HeapRegion* r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   780
    r->reset_gc_time_stamp();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   781
    if (r->continuesHumongous())
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   782
      return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   783
    HeapRegionRemSet* hrrs = r->rem_set();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   784
    if (hrrs != NULL) hrrs->clear();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   785
    // You might think here that we could clear just the cards
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   786
    // corresponding to the used region.  But no: if we leave a dirty card
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   787
    // in a region we might allocate into, then it would prevent that card
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   788
    // from being enqueued, and cause it to be missed.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   789
    // Re: the performance cost: we shouldn't be doing full GC anyway!
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   790
    _mr_bs->clear(MemRegion(r->bottom(), r->end()));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   791
    return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   792
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   793
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   794
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   795
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   796
class PostMCRemSetInvalidateClosure: public HeapRegionClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   797
  ModRefBarrierSet* _mr_bs;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   798
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   799
  PostMCRemSetInvalidateClosure(ModRefBarrierSet* mr_bs) : _mr_bs(mr_bs) {}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   800
  bool doHeapRegion(HeapRegion* r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   801
    if (r->continuesHumongous()) return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   802
    if (r->used_region().word_size() != 0) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   803
      _mr_bs->invalidate(r->used_region(), true /*whole heap*/);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   804
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   805
    return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   806
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   807
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   808
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   809
void G1CollectedHeap::do_collection(bool full, bool clear_all_soft_refs,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   810
                                    size_t word_size) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   811
  ResourceMark rm;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   812
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   813
  if (full && DisableExplicitGC) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   814
    gclog_or_tty->print("\n\n\nDisabling Explicit GC\n\n\n");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   815
    return;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   816
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   817
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   818
  assert(SafepointSynchronize::is_at_safepoint(), "should be at safepoint");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   819
  assert(Thread::current() == VMThread::vm_thread(), "should be in vm thread");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   820
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   821
  if (GC_locker::is_active()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   822
    return; // GC is disabled (e.g. JNI GetXXXCritical operation)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   823
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   824
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   825
  {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   826
    IsGCActiveMark x;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   827
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   828
    // Timing
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   829
    gclog_or_tty->date_stamp(PrintGC && PrintGCDateStamps);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   830
    TraceCPUTime tcpu(PrintGCDetails, true, gclog_or_tty);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   831
    TraceTime t(full ? "Full GC (System.gc())" : "Full GC", PrintGC, true, gclog_or_tty);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   832
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   833
    double start = os::elapsedTime();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   834
    GCOverheadReporter::recordSTWStart(start);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   835
    g1_policy()->record_full_collection_start();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   836
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   837
    gc_prologue(true);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   838
    increment_total_collections();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   839
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   840
    size_t g1h_prev_used = used();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   841
    assert(used() == recalculate_used(), "Should be equal");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   842
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   843
    if (VerifyBeforeGC && total_collections() >= VerifyGCStartAt) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   844
      HandleMark hm;  // Discard invalid handles created during verification
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   845
      prepare_for_verify();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   846
      gclog_or_tty->print(" VerifyBeforeGC:");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   847
      Universe::verify(true);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   848
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   849
    assert(regions_accounted_for(), "Region leakage!");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   850
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   851
    COMPILER2_PRESENT(DerivedPointerTable::clear());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   852
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   853
    // We want to discover references, but not process them yet.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   854
    // This mode is disabled in
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   855
    // instanceRefKlass::process_discovered_references if the
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   856
    // generation does some collection work, or
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   857
    // instanceRefKlass::enqueue_discovered_references if the
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   858
    // generation returns without doing any work.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   859
    ref_processor()->disable_discovery();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   860
    ref_processor()->abandon_partial_discovery();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   861
    ref_processor()->verify_no_references_recorded();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   862
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   863
    // Abandon current iterations of concurrent marking and concurrent
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   864
    // refinement, if any are in progress.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   865
    concurrent_mark()->abort();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   866
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   867
    // Make sure we'll choose a new allocation region afterwards.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   868
    abandon_cur_alloc_region();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   869
    assert(_cur_alloc_region == NULL, "Invariant.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   870
    g1_rem_set()->as_HRInto_G1RemSet()->cleanupHRRS();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   871
    tear_down_region_lists();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   872
    set_used_regions_to_need_zero_fill();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   873
    if (g1_policy()->in_young_gc_mode()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   874
      empty_young_list();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   875
      g1_policy()->set_full_young_gcs(true);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   876
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   877
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   878
    // Temporarily make reference _discovery_ single threaded (non-MT).
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   879
    ReferenceProcessorMTMutator rp_disc_ser(ref_processor(), false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   880
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   881
    // Temporarily make refs discovery atomic
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   882
    ReferenceProcessorAtomicMutator rp_disc_atomic(ref_processor(), true);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   883
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   884
    // Temporarily clear _is_alive_non_header
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   885
    ReferenceProcessorIsAliveMutator rp_is_alive_null(ref_processor(), NULL);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   886
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   887
    ref_processor()->enable_discovery();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   888
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   889
    // Do collection work
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   890
    {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   891
      HandleMark hm;  // Discard invalid handles created during gc
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   892
      G1MarkSweep::invoke_at_safepoint(ref_processor(), clear_all_soft_refs);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   893
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   894
    // Because freeing humongous regions may have added some unclean
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   895
    // regions, it is necessary to tear down again before rebuilding.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   896
    tear_down_region_lists();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   897
    rebuild_region_lists();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   898
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   899
    _summary_bytes_used = recalculate_used();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   900
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   901
    ref_processor()->enqueue_discovered_references();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   902
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   903
    COMPILER2_PRESENT(DerivedPointerTable::update_pointers());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   904
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   905
    if (VerifyAfterGC && total_collections() >= VerifyGCStartAt) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   906
      HandleMark hm;  // Discard invalid handles created during verification
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   907
      gclog_or_tty->print(" VerifyAfterGC:");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   908
      Universe::verify(false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   909
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   910
    NOT_PRODUCT(ref_processor()->verify_no_references_recorded());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   911
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   912
    reset_gc_time_stamp();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   913
    // Since everything potentially moved, we will clear all remembered
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   914
    // sets, and clear all cards.  Later we will also cards in the used
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   915
    // portion of the heap after the resizing (which could be a shrinking.)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   916
    // We will also reset the GC time stamps of the regions.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   917
    PostMCRemSetClearClosure rs_clear(mr_bs());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   918
    heap_region_iterate(&rs_clear);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   919
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   920
    // Resize the heap if necessary.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   921
    resize_if_necessary_after_full_collection(full ? 0 : word_size);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   922
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   923
    // Since everything potentially moved, we will clear all remembered
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   924
    // sets, but also dirty all cards corresponding to used regions.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   925
    PostMCRemSetInvalidateClosure rs_invalidate(mr_bs());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   926
    heap_region_iterate(&rs_invalidate);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   927
    if (_cg1r->use_cache()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   928
      _cg1r->clear_and_record_card_counts();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   929
      _cg1r->clear_hot_cache();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   930
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   931
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   932
    if (PrintGC) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   933
      print_size_transition(gclog_or_tty, g1h_prev_used, used(), capacity());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   934
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   935
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   936
    if (true) { // FIXME
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   937
      // Ask the permanent generation to adjust size for full collections
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   938
      perm()->compute_new_size();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   939
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   940
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   941
    double end = os::elapsedTime();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   942
    GCOverheadReporter::recordSTWEnd(end);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   943
    g1_policy()->record_full_collection_end();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   944
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   945
    gc_epilogue(true);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   946
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   947
    // Abandon concurrent refinement.  This must happen last: in the
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   948
    // dirty-card logging system, some cards may be dirty by weak-ref
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   949
    // processing, and may be enqueued.  But the whole card table is
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   950
    // dirtied, so this should abandon those logs, and set "do_traversal"
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   951
    // to true.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   952
    concurrent_g1_refine()->set_pya_restart();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   953
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   954
    assert(regions_accounted_for(), "Region leakage!");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   955
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   956
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   957
  if (g1_policy()->in_young_gc_mode()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   958
    _young_list->reset_sampled_info();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   959
    assert( check_young_list_empty(false, false),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   960
            "young list should be empty at this point");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   961
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   962
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   963
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   964
void G1CollectedHeap::do_full_collection(bool clear_all_soft_refs) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   965
  do_collection(true, clear_all_soft_refs, 0);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   966
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   967
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   968
// This code is mostly copied from TenuredGeneration.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   969
void
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   970
G1CollectedHeap::
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   971
resize_if_necessary_after_full_collection(size_t word_size) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   972
  assert(MinHeapFreeRatio <= MaxHeapFreeRatio, "sanity check");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   973
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   974
  // Include the current allocation, if any, and bytes that will be
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   975
  // pre-allocated to support collections, as "used".
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   976
  const size_t used_after_gc = used();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   977
  const size_t capacity_after_gc = capacity();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   978
  const size_t free_after_gc = capacity_after_gc - used_after_gc;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   979
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   980
  // We don't have floating point command-line arguments
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   981
  const double minimum_free_percentage = (double) MinHeapFreeRatio / 100;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   982
  const double maximum_used_percentage = 1.0 - minimum_free_percentage;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   983
  const double maximum_free_percentage = (double) MaxHeapFreeRatio / 100;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   984
  const double minimum_used_percentage = 1.0 - maximum_free_percentage;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   985
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   986
  size_t minimum_desired_capacity = (size_t) (used_after_gc / maximum_used_percentage);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   987
  size_t maximum_desired_capacity = (size_t) (used_after_gc / minimum_used_percentage);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   988
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   989
  // Don't shrink less than the initial size.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   990
  minimum_desired_capacity =
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   991
    MAX2(minimum_desired_capacity,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   992
         collector_policy()->initial_heap_byte_size());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   993
  maximum_desired_capacity =
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   994
    MAX2(maximum_desired_capacity,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   995
         collector_policy()->initial_heap_byte_size());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   996
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   997
  // We are failing here because minimum_desired_capacity is
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   998
  assert(used_after_gc <= minimum_desired_capacity, "sanity check");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   999
  assert(minimum_desired_capacity <= maximum_desired_capacity, "sanity check");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1000
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1001
  if (PrintGC && Verbose) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1002
    const double free_percentage = ((double)free_after_gc) / capacity();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1003
    gclog_or_tty->print_cr("Computing new size after full GC ");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1004
    gclog_or_tty->print_cr("  "
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1005
                           "  minimum_free_percentage: %6.2f",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1006
                           minimum_free_percentage);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1007
    gclog_or_tty->print_cr("  "
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1008
                           "  maximum_free_percentage: %6.2f",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1009
                           maximum_free_percentage);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1010
    gclog_or_tty->print_cr("  "
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1011
                           "  capacity: %6.1fK"
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1012
                           "  minimum_desired_capacity: %6.1fK"
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1013
                           "  maximum_desired_capacity: %6.1fK",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1014
                           capacity() / (double) K,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1015
                           minimum_desired_capacity / (double) K,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1016
                           maximum_desired_capacity / (double) K);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1017
    gclog_or_tty->print_cr("  "
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1018
                           "   free_after_gc   : %6.1fK"
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1019
                           "   used_after_gc   : %6.1fK",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1020
                           free_after_gc / (double) K,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1021
                           used_after_gc / (double) K);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1022
    gclog_or_tty->print_cr("  "
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1023
                           "   free_percentage: %6.2f",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1024
                           free_percentage);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1025
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1026
  if (capacity() < minimum_desired_capacity) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1027
    // Don't expand unless it's significant
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1028
    size_t expand_bytes = minimum_desired_capacity - capacity_after_gc;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1029
    expand(expand_bytes);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1030
    if (PrintGC && Verbose) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1031
      gclog_or_tty->print_cr("    expanding:"
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1032
                             "  minimum_desired_capacity: %6.1fK"
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1033
                             "  expand_bytes: %6.1fK",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1034
                             minimum_desired_capacity / (double) K,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1035
                             expand_bytes / (double) K);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1036
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1037
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1038
    // No expansion, now see if we want to shrink
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1039
  } else if (capacity() > maximum_desired_capacity) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1040
    // Capacity too large, compute shrinking size
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1041
    size_t shrink_bytes = capacity_after_gc - maximum_desired_capacity;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1042
    shrink(shrink_bytes);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1043
    if (PrintGC && Verbose) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1044
      gclog_or_tty->print_cr("  "
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1045
                             "  shrinking:"
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1046
                             "  initSize: %.1fK"
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1047
                             "  maximum_desired_capacity: %.1fK",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1048
                             collector_policy()->initial_heap_byte_size() / (double) K,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1049
                             maximum_desired_capacity / (double) K);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1050
      gclog_or_tty->print_cr("  "
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1051
                             "  shrink_bytes: %.1fK",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1052
                             shrink_bytes / (double) K);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1053
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1054
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1055
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1056
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1057
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1058
HeapWord*
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1059
G1CollectedHeap::satisfy_failed_allocation(size_t word_size) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1060
  HeapWord* result = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1061
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1062
  // In a G1 heap, we're supposed to keep allocation from failing by
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1063
  // incremental pauses.  Therefore, at least for now, we'll favor
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1064
  // expansion over collection.  (This might change in the future if we can
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1065
  // do something smarter than full collection to satisfy a failed alloc.)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1066
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1067
  result = expand_and_allocate(word_size);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1068
  if (result != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1069
    assert(is_in(result), "result not in heap");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1070
    return result;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1071
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1072
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1073
  // OK, I guess we have to try collection.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1074
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1075
  do_collection(false, false, word_size);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1076
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1077
  result = attempt_allocation(word_size, /*permit_collection_pause*/false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1078
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1079
  if (result != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1080
    assert(is_in(result), "result not in heap");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1081
    return result;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1082
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1083
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1084
  // Try collecting soft references.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1085
  do_collection(false, true, word_size);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1086
  result = attempt_allocation(word_size, /*permit_collection_pause*/false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1087
  if (result != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1088
    assert(is_in(result), "result not in heap");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1089
    return result;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1090
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1091
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1092
  // What else?  We might try synchronous finalization later.  If the total
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1093
  // space available is large enough for the allocation, then a more
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1094
  // complete compaction phase than we've tried so far might be
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1095
  // appropriate.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1096
  return NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1097
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1098
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1099
// Attempting to expand the heap sufficiently
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1100
// to support an allocation of the given "word_size".  If
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1101
// successful, perform the allocation and return the address of the
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1102
// allocated block, or else "NULL".
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1103
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1104
HeapWord* G1CollectedHeap::expand_and_allocate(size_t word_size) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1105
  size_t expand_bytes = word_size * HeapWordSize;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1106
  if (expand_bytes < MinHeapDeltaBytes) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1107
    expand_bytes = MinHeapDeltaBytes;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1108
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1109
  expand(expand_bytes);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1110
  assert(regions_accounted_for(), "Region leakage!");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1111
  HeapWord* result = attempt_allocation(word_size, false /* permit_collection_pause */);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1112
  return result;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1113
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1114
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1115
size_t G1CollectedHeap::free_region_if_totally_empty(HeapRegion* hr) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1116
  size_t pre_used = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1117
  size_t cleared_h_regions = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1118
  size_t freed_regions = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1119
  UncleanRegionList local_list;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1120
  free_region_if_totally_empty_work(hr, pre_used, cleared_h_regions,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1121
                                    freed_regions, &local_list);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1122
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1123
  finish_free_region_work(pre_used, cleared_h_regions, freed_regions,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1124
                          &local_list);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1125
  return pre_used;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1126
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1127
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1128
void
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1129
G1CollectedHeap::free_region_if_totally_empty_work(HeapRegion* hr,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1130
                                                   size_t& pre_used,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1131
                                                   size_t& cleared_h,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1132
                                                   size_t& freed_regions,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1133
                                                   UncleanRegionList* list,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1134
                                                   bool par) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1135
  assert(!hr->continuesHumongous(), "should have filtered these out");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1136
  size_t res = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1137
  if (!hr->popular() && hr->used() > 0 && hr->garbage_bytes() == hr->used()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1138
    if (!hr->is_young()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1139
      if (G1PolicyVerbose > 0)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1140
        gclog_or_tty->print_cr("Freeing empty region "PTR_FORMAT "(" SIZE_FORMAT " bytes)"
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1141
                               " during cleanup", hr, hr->used());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1142
      free_region_work(hr, pre_used, cleared_h, freed_regions, list, par);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1143
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1144
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1145
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1146
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1147
// FIXME: both this and shrink could probably be more efficient by
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1148
// doing one "VirtualSpace::expand_by" call rather than several.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1149
void G1CollectedHeap::expand(size_t expand_bytes) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1150
  size_t old_mem_size = _g1_storage.committed_size();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1151
  // We expand by a minimum of 1K.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1152
  expand_bytes = MAX2(expand_bytes, (size_t)K);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1153
  size_t aligned_expand_bytes =
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1154
    ReservedSpace::page_align_size_up(expand_bytes);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1155
  aligned_expand_bytes = align_size_up(aligned_expand_bytes,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1156
                                       HeapRegion::GrainBytes);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1157
  expand_bytes = aligned_expand_bytes;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1158
  while (expand_bytes > 0) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1159
    HeapWord* base = (HeapWord*)_g1_storage.high();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1160
    // Commit more storage.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1161
    bool successful = _g1_storage.expand_by(HeapRegion::GrainBytes);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1162
    if (!successful) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1163
        expand_bytes = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1164
    } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1165
      expand_bytes -= HeapRegion::GrainBytes;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1166
      // Expand the committed region.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1167
      HeapWord* high = (HeapWord*) _g1_storage.high();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1168
      _g1_committed.set_end(high);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1169
      // Create a new HeapRegion.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1170
      MemRegion mr(base, high);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1171
      bool is_zeroed = !_g1_max_committed.contains(base);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1172
      HeapRegion* hr = new HeapRegion(_bot_shared, mr, is_zeroed);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1173
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1174
      // Now update max_committed if necessary.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1175
      _g1_max_committed.set_end(MAX2(_g1_max_committed.end(), high));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1176
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1177
      // Add it to the HeapRegionSeq.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1178
      _hrs->insert(hr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1179
      // Set the zero-fill state, according to whether it's already
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1180
      // zeroed.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1181
      {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1182
        MutexLockerEx x(ZF_mon, Mutex::_no_safepoint_check_flag);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1183
        if (is_zeroed) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1184
          hr->set_zero_fill_complete();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1185
          put_free_region_on_list_locked(hr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1186
        } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1187
          hr->set_zero_fill_needed();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1188
          put_region_on_unclean_list_locked(hr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1189
        }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1190
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1191
      _free_regions++;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1192
      // And we used up an expansion region to create it.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1193
      _expansion_regions--;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1194
      // Tell the cardtable about it.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1195
      Universe::heap()->barrier_set()->resize_covered_region(_g1_committed);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1196
      // And the offset table as well.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1197
      _bot_shared->resize(_g1_committed.word_size());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1198
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1199
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1200
  if (Verbose && PrintGC) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1201
    size_t new_mem_size = _g1_storage.committed_size();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1202
    gclog_or_tty->print_cr("Expanding garbage-first heap from %ldK by %ldK to %ldK",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1203
                           old_mem_size/K, aligned_expand_bytes/K,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1204
                           new_mem_size/K);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1205
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1206
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1207
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1208
void G1CollectedHeap::shrink_helper(size_t shrink_bytes)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1209
{
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1210
  size_t old_mem_size = _g1_storage.committed_size();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1211
  size_t aligned_shrink_bytes =
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1212
    ReservedSpace::page_align_size_down(shrink_bytes);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1213
  aligned_shrink_bytes = align_size_down(aligned_shrink_bytes,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1214
                                         HeapRegion::GrainBytes);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1215
  size_t num_regions_deleted = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1216
  MemRegion mr = _hrs->shrink_by(aligned_shrink_bytes, num_regions_deleted);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1217
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1218
  assert(mr.end() == (HeapWord*)_g1_storage.high(), "Bad shrink!");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1219
  if (mr.byte_size() > 0)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1220
    _g1_storage.shrink_by(mr.byte_size());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1221
  assert(mr.start() == (HeapWord*)_g1_storage.high(), "Bad shrink!");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1222
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1223
  _g1_committed.set_end(mr.start());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1224
  _free_regions -= num_regions_deleted;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1225
  _expansion_regions += num_regions_deleted;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1226
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1227
  // Tell the cardtable about it.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1228
  Universe::heap()->barrier_set()->resize_covered_region(_g1_committed);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1229
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1230
  // And the offset table as well.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1231
  _bot_shared->resize(_g1_committed.word_size());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1232
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1233
  HeapRegionRemSet::shrink_heap(n_regions());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1234
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1235
  if (Verbose && PrintGC) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1236
    size_t new_mem_size = _g1_storage.committed_size();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1237
    gclog_or_tty->print_cr("Shrinking garbage-first heap from %ldK by %ldK to %ldK",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1238
                           old_mem_size/K, aligned_shrink_bytes/K,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1239
                           new_mem_size/K);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1240
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1241
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1242
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1243
void G1CollectedHeap::shrink(size_t shrink_bytes) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1244
  release_gc_alloc_regions();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1245
  tear_down_region_lists();  // We will rebuild them in a moment.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1246
  shrink_helper(shrink_bytes);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1247
  rebuild_region_lists();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1248
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1249
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1250
// Public methods.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1251
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1252
#ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1253
#pragma warning( disable:4355 ) // 'this' : used in base member initializer list
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1254
#endif // _MSC_VER
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1255
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1256
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1257
G1CollectedHeap::G1CollectedHeap(G1CollectorPolicy* policy_) :
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1258
  SharedHeap(policy_),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1259
  _g1_policy(policy_),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1260
  _ref_processor(NULL),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1261
  _process_strong_tasks(new SubTasksDone(G1H_PS_NumElements)),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1262
  _bot_shared(NULL),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1263
  _par_alloc_during_gc_lock(Mutex::leaf, "par alloc during GC lock"),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1264
  _objs_with_preserved_marks(NULL), _preserved_marks_of_objs(NULL),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1265
  _evac_failure_scan_stack(NULL) ,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1266
  _mark_in_progress(false),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1267
  _cg1r(NULL), _czft(NULL), _summary_bytes_used(0),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1268
  _cur_alloc_region(NULL),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1269
  _refine_cte_cl(NULL),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1270
  _free_region_list(NULL), _free_region_list_size(0),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1271
  _free_regions(0),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1272
  _popular_object_boundary(NULL),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1273
  _cur_pop_hr_index(0),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1274
  _popular_regions_to_be_evacuated(NULL),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1275
  _pop_obj_rc_at_copy(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1276
  _full_collection(false),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1277
  _unclean_region_list(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1278
  _unclean_regions_coming(false),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1279
  _young_list(new YoungList(this)),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1280
  _gc_time_stamp(0),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1281
  _surviving_young_words(NULL)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1282
{
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1283
  _g1h = this; // To catch bugs.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1284
  if (_process_strong_tasks == NULL || !_process_strong_tasks->valid()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1285
    vm_exit_during_initialization("Failed necessary allocation.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1286
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1287
  int n_queues = MAX2((int)ParallelGCThreads, 1);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1288
  _task_queues = new RefToScanQueueSet(n_queues);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1289
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1290
  int n_rem_sets = HeapRegionRemSet::num_par_rem_sets();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1291
  assert(n_rem_sets > 0, "Invariant.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1292
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1293
  HeapRegionRemSetIterator** iter_arr =
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1294
    NEW_C_HEAP_ARRAY(HeapRegionRemSetIterator*, n_queues);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1295
  for (int i = 0; i < n_queues; i++) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1296
    iter_arr[i] = new HeapRegionRemSetIterator();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1297
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1298
  _rem_set_iterator = iter_arr;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1299
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1300
  for (int i = 0; i < n_queues; i++) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1301
    RefToScanQueue* q = new RefToScanQueue();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1302
    q->initialize();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1303
    _task_queues->register_queue(i, q);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1304
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1305
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1306
  for (int ap = 0; ap < GCAllocPurposeCount; ++ap) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1307
    _gc_alloc_regions[ap]       = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1308
    _gc_alloc_region_counts[ap] = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1309
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1310
  guarantee(_task_queues != NULL, "task_queues allocation failure.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1311
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1312
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1313
jint G1CollectedHeap::initialize() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1314
  os::enable_vtime();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1315
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1316
  // Necessary to satisfy locking discipline assertions.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1317
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1318
  MutexLocker x(Heap_lock);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1319
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1320
  // While there are no constraints in the GC code that HeapWordSize
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1321
  // be any particular value, there are multiple other areas in the
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1322
  // system which believe this to be true (e.g. oop->object_size in some
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1323
  // cases incorrectly returns the size in wordSize units rather than
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1324
  // HeapWordSize).
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1325
  guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1326
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1327
  size_t init_byte_size = collector_policy()->initial_heap_byte_size();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1328
  size_t max_byte_size = collector_policy()->max_heap_byte_size();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1329
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1330
  // Ensure that the sizes are properly aligned.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1331
  Universe::check_alignment(init_byte_size, HeapRegion::GrainBytes, "g1 heap");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1332
  Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1333
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1334
  // We allocate this in any case, but only do no work if the command line
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1335
  // param is off.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1336
  _cg1r = new ConcurrentG1Refine();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1337
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1338
  // Reserve the maximum.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1339
  PermanentGenerationSpec* pgs = collector_policy()->permanent_generation();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1340
  // Includes the perm-gen.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1341
  ReservedSpace heap_rs(max_byte_size + pgs->max_size(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1342
                        HeapRegion::GrainBytes,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1343
                        false /*ism*/);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1344
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1345
  if (!heap_rs.is_reserved()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1346
    vm_exit_during_initialization("Could not reserve enough space for object heap");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1347
    return JNI_ENOMEM;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1348
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1349
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1350
  // It is important to do this in a way such that concurrent readers can't
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1351
  // temporarily think somethings in the heap.  (I've actually seen this
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1352
  // happen in asserts: DLD.)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1353
  _reserved.set_word_size(0);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1354
  _reserved.set_start((HeapWord*)heap_rs.base());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1355
  _reserved.set_end((HeapWord*)(heap_rs.base() + heap_rs.size()));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1356
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1357
  _expansion_regions = max_byte_size/HeapRegion::GrainBytes;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1358
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1359
  _num_humongous_regions = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1360
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1361
  // Create the gen rem set (and barrier set) for the entire reserved region.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1362
  _rem_set = collector_policy()->create_rem_set(_reserved, 2);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1363
  set_barrier_set(rem_set()->bs());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1364
  if (barrier_set()->is_a(BarrierSet::ModRef)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1365
    _mr_bs = (ModRefBarrierSet*)_barrier_set;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1366
  } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1367
    vm_exit_during_initialization("G1 requires a mod ref bs.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1368
    return JNI_ENOMEM;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1369
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1370
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1371
  // Also create a G1 rem set.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1372
  if (G1UseHRIntoRS) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1373
    if (mr_bs()->is_a(BarrierSet::CardTableModRef)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1374
      _g1_rem_set = new HRInto_G1RemSet(this, (CardTableModRefBS*)mr_bs());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1375
    } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1376
      vm_exit_during_initialization("G1 requires a cardtable mod ref bs.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1377
      return JNI_ENOMEM;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1378
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1379
  } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1380
    _g1_rem_set = new StupidG1RemSet(this);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1381
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1382
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1383
  // Carve out the G1 part of the heap.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1384
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1385
  ReservedSpace g1_rs   = heap_rs.first_part(max_byte_size);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1386
  _g1_reserved = MemRegion((HeapWord*)g1_rs.base(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1387
                           g1_rs.size()/HeapWordSize);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1388
  ReservedSpace perm_gen_rs = heap_rs.last_part(max_byte_size);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1389
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1390
  _perm_gen = pgs->init(perm_gen_rs, pgs->init_size(), rem_set());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1391
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1392
  _g1_storage.initialize(g1_rs, 0);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1393
  _g1_committed = MemRegion((HeapWord*)_g1_storage.low(), (size_t) 0);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1394
  _g1_max_committed = _g1_committed;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1395
  _hrs = new HeapRegionSeq();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1396
  guarantee(_hrs != NULL, "Couldn't allocate HeapRegionSeq");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1397
  guarantee(_cur_alloc_region == NULL, "from constructor");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1398
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1399
  _bot_shared = new G1BlockOffsetSharedArray(_reserved,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1400
                                             heap_word_size(init_byte_size));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1401
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1402
  _g1h = this;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1403
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1404
  // Create the ConcurrentMark data structure and thread.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1405
  // (Must do this late, so that "max_regions" is defined.)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1406
  _cm       = new ConcurrentMark(heap_rs, (int) max_regions());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1407
  _cmThread = _cm->cmThread();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1408
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1409
  // ...and the concurrent zero-fill thread, if necessary.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1410
  if (G1ConcZeroFill) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1411
    _czft = new ConcurrentZFThread();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1412
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1413
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1414
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1415
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1416
  // Allocate the popular regions; take them off free lists.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1417
  size_t pop_byte_size = G1NumPopularRegions * HeapRegion::GrainBytes;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1418
  expand(pop_byte_size);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1419
  _popular_object_boundary =
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1420
    _g1_reserved.start() + (G1NumPopularRegions * HeapRegion::GrainWords);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1421
  for (int i = 0; i < G1NumPopularRegions; i++) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1422
    HeapRegion* hr = newAllocRegion(HeapRegion::GrainWords);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1423
    //    assert(hr != NULL && hr->bottom() < _popular_object_boundary,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1424
    //     "Should be enough, and all should be below boundary.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1425
    hr->set_popular(true);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1426
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1427
  assert(_cur_pop_hr_index == 0, "Start allocating at the first region.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1428
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1429
  // Initialize the from_card cache structure of HeapRegionRemSet.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1430
  HeapRegionRemSet::init_heap(max_regions());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1431
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1432
  // Now expand into the rest of the initial heap size.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1433
  expand(init_byte_size - pop_byte_size);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1434
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1435
  // Perform any initialization actions delegated to the policy.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1436
  g1_policy()->init();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1437
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1438
  g1_policy()->note_start_of_mark_thread();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1439
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1440
  _refine_cte_cl =
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1441
    new RefineCardTableEntryClosure(ConcurrentG1RefineThread::sts(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1442
                                    g1_rem_set(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1443
                                    concurrent_g1_refine());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1444
  JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1445
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1446
  JavaThread::satb_mark_queue_set().initialize(SATB_Q_CBL_mon,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1447
                                               SATB_Q_FL_lock,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1448
                                               0,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1449
                                               Shared_SATB_Q_lock);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1450
  if (G1RSBarrierUseQueue) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1451
    JavaThread::dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1452
                                                  DirtyCardQ_FL_lock,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1453
                                                  G1DirtyCardQueueMax,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1454
                                                  Shared_DirtyCardQ_lock);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1455
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1456
  // In case we're keeping closure specialization stats, initialize those
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1457
  // counts and that mechanism.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1458
  SpecializationStats::clear();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1459
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1460
  _gc_alloc_region_list = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1461
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1462
  // Do later initialization work for concurrent refinement.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1463
  _cg1r->init();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1464
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1465
  const char* group_names[] = { "CR", "ZF", "CM", "CL" };
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1466
  GCOverheadReporter::initGCOverheadReporter(4, group_names);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1467
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1468
  return JNI_OK;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1469
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1470
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1471
void G1CollectedHeap::ref_processing_init() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1472
  SharedHeap::ref_processing_init();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1473
  MemRegion mr = reserved_region();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1474
  _ref_processor = ReferenceProcessor::create_ref_processor(
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1475
                                         mr,    // span
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1476
                                         false, // Reference discovery is not atomic
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1477
                                                // (though it shouldn't matter here.)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1478
                                         true,  // mt_discovery
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1479
                                         NULL,  // is alive closure: need to fill this in for efficiency
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1480
                                         ParallelGCThreads,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1481
                                         ParallelRefProcEnabled,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1482
                                         true); // Setting next fields of discovered
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1483
                                                // lists requires a barrier.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1484
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1485
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1486
size_t G1CollectedHeap::capacity() const {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1487
  return _g1_committed.byte_size();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1488
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1489
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1490
void G1CollectedHeap::iterate_dirty_card_closure(bool concurrent,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1491
                                                 int worker_i) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1492
  DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1493
  int n_completed_buffers = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1494
  while (dcqs.apply_closure_to_completed_buffer(worker_i, 0, true)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1495
    n_completed_buffers++;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1496
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1497
  g1_policy()->record_update_rs_processed_buffers(worker_i,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1498
                                                  (double) n_completed_buffers);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1499
  dcqs.clear_n_completed_buffers();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1500
  // Finish up the queue...
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1501
  if (worker_i == 0) concurrent_g1_refine()->clean_up_cache(worker_i,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1502
                                                            g1_rem_set());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1503
  assert(!dcqs.completed_buffers_exist_dirty(), "Completed buffers exist!");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1504
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1505
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1506
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1507
// Computes the sum of the storage used by the various regions.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1508
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1509
size_t G1CollectedHeap::used() const {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1510
  assert(Heap_lock->owner() != NULL,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1511
         "Should be owned on this thread's behalf.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1512
  size_t result = _summary_bytes_used;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1513
  if (_cur_alloc_region != NULL)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1514
    result += _cur_alloc_region->used();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1515
  return result;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1516
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1517
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1518
class SumUsedClosure: public HeapRegionClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1519
  size_t _used;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1520
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1521
  SumUsedClosure() : _used(0) {}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1522
  bool doHeapRegion(HeapRegion* r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1523
    if (!r->continuesHumongous()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1524
      _used += r->used();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1525
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1526
    return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1527
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1528
  size_t result() { return _used; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1529
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1530
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1531
size_t G1CollectedHeap::recalculate_used() const {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1532
  SumUsedClosure blk;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1533
  _hrs->iterate(&blk);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1534
  return blk.result();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1535
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1536
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1537
#ifndef PRODUCT
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1538
class SumUsedRegionsClosure: public HeapRegionClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1539
  size_t _num;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1540
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1541
  // _num is set to 1 to account for the popular region
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1542
  SumUsedRegionsClosure() : _num(G1NumPopularRegions) {}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1543
  bool doHeapRegion(HeapRegion* r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1544
    if (r->continuesHumongous() || r->used() > 0 || r->is_gc_alloc_region()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1545
      _num += 1;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1546
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1547
    return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1548
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1549
  size_t result() { return _num; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1550
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1551
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1552
size_t G1CollectedHeap::recalculate_used_regions() const {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1553
  SumUsedRegionsClosure blk;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1554
  _hrs->iterate(&blk);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1555
  return blk.result();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1556
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1557
#endif // PRODUCT
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1558
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1559
size_t G1CollectedHeap::unsafe_max_alloc() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1560
  if (_free_regions > 0) return HeapRegion::GrainBytes;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1561
  // otherwise, is there space in the current allocation region?
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1562
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1563
  // We need to store the current allocation region in a local variable
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1564
  // here. The problem is that this method doesn't take any locks and
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1565
  // there may be other threads which overwrite the current allocation
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1566
  // region field. attempt_allocation(), for example, sets it to NULL
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1567
  // and this can happen *after* the NULL check here but before the call
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1568
  // to free(), resulting in a SIGSEGV. Note that this doesn't appear
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1569
  // to be a problem in the optimized build, since the two loads of the
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1570
  // current allocation region field are optimized away.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1571
  HeapRegion* car = _cur_alloc_region;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1572
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1573
  // FIXME: should iterate over all regions?
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1574
  if (car == NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1575
    return 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1576
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1577
  return car->free();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1578
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1579
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1580
void G1CollectedHeap::collect(GCCause::Cause cause) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1581
  // The caller doesn't have the Heap_lock
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1582
  assert(!Heap_lock->owned_by_self(), "this thread should not own the Heap_lock");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1583
  MutexLocker ml(Heap_lock);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1584
  collect_locked(cause);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1585
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1586
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1587
void G1CollectedHeap::collect_as_vm_thread(GCCause::Cause cause) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1588
  assert(Thread::current()->is_VM_thread(), "Precondition#1");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1589
  assert(Heap_lock->is_locked(), "Precondition#2");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1590
  GCCauseSetter gcs(this, cause);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1591
  switch (cause) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1592
    case GCCause::_heap_inspection:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1593
    case GCCause::_heap_dump: {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1594
      HandleMark hm;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1595
      do_full_collection(false);         // don't clear all soft refs
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1596
      break;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1597
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1598
    default: // XXX FIX ME
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1599
      ShouldNotReachHere(); // Unexpected use of this function
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1600
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1601
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1602
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1603
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1604
void G1CollectedHeap::collect_locked(GCCause::Cause cause) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1605
  // Don't want to do a GC until cleanup is completed.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1606
  wait_for_cleanup_complete();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1607
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1608
  // Read the GC count while holding the Heap_lock
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1609
  int gc_count_before = SharedHeap::heap()->total_collections();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1610
  {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1611
    MutexUnlocker mu(Heap_lock);  // give up heap lock, execute gets it back
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1612
    VM_G1CollectFull op(gc_count_before, cause);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1613
    VMThread::execute(&op);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1614
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1615
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1616
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1617
bool G1CollectedHeap::is_in(const void* p) const {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1618
  if (_g1_committed.contains(p)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1619
    HeapRegion* hr = _hrs->addr_to_region(p);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1620
    return hr->is_in(p);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1621
  } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1622
    return _perm_gen->as_gen()->is_in(p);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1623
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1624
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1625
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1626
// Iteration functions.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1627
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1628
// Iterates an OopClosure over all ref-containing fields of objects
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1629
// within a HeapRegion.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1630
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1631
class IterateOopClosureRegionClosure: public HeapRegionClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1632
  MemRegion _mr;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1633
  OopClosure* _cl;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1634
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1635
  IterateOopClosureRegionClosure(MemRegion mr, OopClosure* cl)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1636
    : _mr(mr), _cl(cl) {}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1637
  bool doHeapRegion(HeapRegion* r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1638
    if (! r->continuesHumongous()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1639
      r->oop_iterate(_cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1640
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1641
    return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1642
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1643
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1644
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1645
void G1CollectedHeap::oop_iterate(OopClosure* cl) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1646
  IterateOopClosureRegionClosure blk(_g1_committed, cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1647
  _hrs->iterate(&blk);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1648
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1649
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1650
void G1CollectedHeap::oop_iterate(MemRegion mr, OopClosure* cl) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1651
  IterateOopClosureRegionClosure blk(mr, cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1652
  _hrs->iterate(&blk);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1653
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1654
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1655
// Iterates an ObjectClosure over all objects within a HeapRegion.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1656
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1657
class IterateObjectClosureRegionClosure: public HeapRegionClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1658
  ObjectClosure* _cl;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1659
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1660
  IterateObjectClosureRegionClosure(ObjectClosure* cl) : _cl(cl) {}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1661
  bool doHeapRegion(HeapRegion* r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1662
    if (! r->continuesHumongous()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1663
      r->object_iterate(_cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1664
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1665
    return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1666
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1667
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1668
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1669
void G1CollectedHeap::object_iterate(ObjectClosure* cl) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1670
  IterateObjectClosureRegionClosure blk(cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1671
  _hrs->iterate(&blk);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1672
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1673
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1674
void G1CollectedHeap::object_iterate_since_last_GC(ObjectClosure* cl) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1675
  // FIXME: is this right?
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1676
  guarantee(false, "object_iterate_since_last_GC not supported by G1 heap");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1677
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1678
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1679
// Calls a SpaceClosure on a HeapRegion.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1680
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1681
class SpaceClosureRegionClosure: public HeapRegionClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1682
  SpaceClosure* _cl;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1683
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1684
  SpaceClosureRegionClosure(SpaceClosure* cl) : _cl(cl) {}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1685
  bool doHeapRegion(HeapRegion* r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1686
    _cl->do_space(r);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1687
    return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1688
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1689
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1690
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1691
void G1CollectedHeap::space_iterate(SpaceClosure* cl) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1692
  SpaceClosureRegionClosure blk(cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1693
  _hrs->iterate(&blk);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1694
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1695
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1696
void G1CollectedHeap::heap_region_iterate(HeapRegionClosure* cl) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1697
  _hrs->iterate(cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1698
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1699
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1700
void G1CollectedHeap::heap_region_iterate_from(HeapRegion* r,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1701
                                               HeapRegionClosure* cl) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1702
  _hrs->iterate_from(r, cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1703
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1704
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1705
void
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1706
G1CollectedHeap::heap_region_iterate_from(int idx, HeapRegionClosure* cl) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1707
  _hrs->iterate_from(idx, cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1708
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1709
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1710
HeapRegion* G1CollectedHeap::region_at(size_t idx) { return _hrs->at(idx); }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1711
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1712
const int OverpartitionFactor = 4;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1713
void
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1714
G1CollectedHeap::heap_region_par_iterate_chunked(HeapRegionClosure* cl,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1715
                                                 int worker,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1716
                                                 jint claim_value) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1717
  // We break up the heap regions into blocks of size ParallelGCThreads (to
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1718
  // decrease iteration costs).
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1719
  const size_t nregions = n_regions();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1720
  const size_t n_thrds = (ParallelGCThreads > 0 ? ParallelGCThreads : 1);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1721
  const size_t partitions = n_thrds * OverpartitionFactor;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1722
  const size_t BlkSize = MAX2(nregions/partitions, (size_t)1);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1723
  const size_t n_blocks = (nregions + BlkSize - 1)/BlkSize;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1724
  assert(ParallelGCThreads > 0 || worker == 0, "Precondition");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1725
  const int init_idx = (int) (n_blocks/n_thrds * worker);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1726
  for (size_t blk = 0; blk < n_blocks; blk++) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1727
    size_t idx = init_idx + blk;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1728
    if (idx >= n_blocks) idx = idx - n_blocks;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1729
    size_t reg_idx = idx * BlkSize;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1730
    assert(reg_idx < nregions, "Because we rounded blk up.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1731
    HeapRegion* r = region_at(reg_idx);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1732
    if (r->claimHeapRegion(claim_value)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1733
      for (size_t j = 0; j < BlkSize; j++) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1734
        size_t reg_idx2 = reg_idx + j;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1735
        if (reg_idx2 == nregions) break;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1736
        HeapRegion* r2 = region_at(reg_idx2);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1737
        if (j > 0) r2->set_claim_value(claim_value);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1738
        bool res = cl->doHeapRegion(r2);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1739
        guarantee(!res, "Should not abort.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1740
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1741
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1742
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1743
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1744
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1745
void G1CollectedHeap::collection_set_iterate(HeapRegionClosure* cl) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1746
  HeapRegion* r = g1_policy()->collection_set();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1747
  while (r != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1748
    HeapRegion* next = r->next_in_collection_set();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1749
    if (cl->doHeapRegion(r)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1750
      cl->incomplete();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1751
      return;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1752
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1753
    r = next;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1754
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1755
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1756
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1757
void G1CollectedHeap::collection_set_iterate_from(HeapRegion* r,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1758
                                                  HeapRegionClosure *cl) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1759
  assert(r->in_collection_set(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1760
         "Start region must be a member of the collection set.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1761
  HeapRegion* cur = r;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1762
  while (cur != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1763
    HeapRegion* next = cur->next_in_collection_set();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1764
    if (cl->doHeapRegion(cur) && false) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1765
      cl->incomplete();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1766
      return;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1767
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1768
    cur = next;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1769
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1770
  cur = g1_policy()->collection_set();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1771
  while (cur != r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1772
    HeapRegion* next = cur->next_in_collection_set();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1773
    if (cl->doHeapRegion(cur) && false) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1774
      cl->incomplete();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1775
      return;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1776
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1777
    cur = next;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1778
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1779
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1780
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1781
CompactibleSpace* G1CollectedHeap::first_compactible_space() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1782
  return _hrs->length() > 0 ? _hrs->at(0) : NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1783
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1784
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1785
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1786
Space* G1CollectedHeap::space_containing(const void* addr) const {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1787
  Space* res = heap_region_containing(addr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1788
  if (res == NULL)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1789
    res = perm_gen()->space_containing(addr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1790
  return res;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1791
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1792
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1793
HeapWord* G1CollectedHeap::block_start(const void* addr) const {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1794
  Space* sp = space_containing(addr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1795
  if (sp != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1796
    return sp->block_start(addr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1797
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1798
  return NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1799
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1800
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1801
size_t G1CollectedHeap::block_size(const HeapWord* addr) const {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1802
  Space* sp = space_containing(addr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1803
  assert(sp != NULL, "block_size of address outside of heap");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1804
  return sp->block_size(addr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1805
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1806
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1807
bool G1CollectedHeap::block_is_obj(const HeapWord* addr) const {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1808
  Space* sp = space_containing(addr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1809
  return sp->block_is_obj(addr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1810
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1811
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1812
bool G1CollectedHeap::supports_tlab_allocation() const {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1813
  return true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1814
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1815
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1816
size_t G1CollectedHeap::tlab_capacity(Thread* ignored) const {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1817
  return HeapRegion::GrainBytes;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1818
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1819
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1820
size_t G1CollectedHeap::unsafe_max_tlab_alloc(Thread* ignored) const {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1821
  // Return the remaining space in the cur alloc region, but not less than
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1822
  // the min TLAB size.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1823
  // Also, no more than half the region size, since we can't allow tlabs to
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1824
  // grow big enough to accomodate humongous objects.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1825
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1826
  // We need to story it locally, since it might change between when we
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1827
  // test for NULL and when we use it later.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1828
  ContiguousSpace* cur_alloc_space = _cur_alloc_region;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1829
  if (cur_alloc_space == NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1830
    return HeapRegion::GrainBytes/2;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1831
  } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1832
    return MAX2(MIN2(cur_alloc_space->free(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1833
                     (size_t)(HeapRegion::GrainBytes/2)),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1834
                (size_t)MinTLABSize);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1835
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1836
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1837
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1838
HeapWord* G1CollectedHeap::allocate_new_tlab(size_t size) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1839
  bool dummy;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1840
  return G1CollectedHeap::mem_allocate(size, false, true, &dummy);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1841
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1842
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1843
bool G1CollectedHeap::allocs_are_zero_filled() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1844
  return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1845
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1846
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1847
size_t G1CollectedHeap::large_typearray_limit() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1848
  // FIXME
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1849
  return HeapRegion::GrainBytes/HeapWordSize;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1850
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1851
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1852
size_t G1CollectedHeap::max_capacity() const {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1853
  return _g1_committed.byte_size();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1854
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1855
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1856
jlong G1CollectedHeap::millis_since_last_gc() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1857
  // assert(false, "NYI");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1858
  return 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1859
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1860
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1861
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1862
void G1CollectedHeap::prepare_for_verify() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1863
  if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1864
    ensure_parsability(false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1865
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1866
  g1_rem_set()->prepare_for_verify();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1867
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1868
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1869
class VerifyLivenessOopClosure: public OopClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1870
  G1CollectedHeap* g1h;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1871
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1872
  VerifyLivenessOopClosure(G1CollectedHeap* _g1h) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1873
    g1h = _g1h;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1874
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1875
  void do_oop(narrowOop *p) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1876
    guarantee(false, "NYI");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1877
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1878
  void do_oop(oop *p) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1879
    oop obj = *p;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1880
    assert(obj == NULL || !g1h->is_obj_dead(obj),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1881
           "Dead object referenced by a not dead object");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1882
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1883
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1884
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1885
class VerifyObjsInRegionClosure: public ObjectClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1886
  G1CollectedHeap* _g1h;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1887
  size_t _live_bytes;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1888
  HeapRegion *_hr;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1889
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1890
  VerifyObjsInRegionClosure(HeapRegion *hr) : _live_bytes(0), _hr(hr) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1891
    _g1h = G1CollectedHeap::heap();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1892
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1893
  void do_object(oop o) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1894
    VerifyLivenessOopClosure isLive(_g1h);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1895
    assert(o != NULL, "Huh?");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1896
    if (!_g1h->is_obj_dead(o)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1897
      o->oop_iterate(&isLive);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1898
      if (!_hr->obj_allocated_since_prev_marking(o))
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1899
        _live_bytes += (o->size() * HeapWordSize);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1900
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1901
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1902
  size_t live_bytes() { return _live_bytes; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1903
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1904
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1905
class PrintObjsInRegionClosure : public ObjectClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1906
  HeapRegion *_hr;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1907
  G1CollectedHeap *_g1;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1908
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1909
  PrintObjsInRegionClosure(HeapRegion *hr) : _hr(hr) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1910
    _g1 = G1CollectedHeap::heap();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1911
  };
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1912
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1913
  void do_object(oop o) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1914
    if (o != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1915
      HeapWord *start = (HeapWord *) o;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1916
      size_t word_sz = o->size();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1917
      gclog_or_tty->print("\nPrinting obj "PTR_FORMAT" of size " SIZE_FORMAT
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1918
                          " isMarkedPrev %d isMarkedNext %d isAllocSince %d\n",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1919
                          (void*) o, word_sz,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1920
                          _g1->isMarkedPrev(o),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1921
                          _g1->isMarkedNext(o),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1922
                          _hr->obj_allocated_since_prev_marking(o));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1923
      HeapWord *end = start + word_sz;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1924
      HeapWord *cur;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1925
      int *val;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1926
      for (cur = start; cur < end; cur++) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1927
        val = (int *) cur;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1928
        gclog_or_tty->print("\t "PTR_FORMAT":"PTR_FORMAT"\n", val, *val);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1929
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1930
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1931
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1932
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1933
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1934
class VerifyRegionClosure: public HeapRegionClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1935
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1936
  bool _allow_dirty;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1937
  VerifyRegionClosure(bool allow_dirty)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1938
    : _allow_dirty(allow_dirty) {}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1939
  bool doHeapRegion(HeapRegion* r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1940
    guarantee(r->claim_value() == 0, "Should be unclaimed at verify points.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1941
    if (r->isHumongous()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1942
      if (r->startsHumongous()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1943
        // Verify the single H object.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1944
        oop(r->bottom())->verify();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1945
        size_t word_sz = oop(r->bottom())->size();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1946
        guarantee(r->top() == r->bottom() + word_sz,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1947
                  "Only one object in a humongous region");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1948
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1949
    } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1950
      VerifyObjsInRegionClosure not_dead_yet_cl(r);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1951
      r->verify(_allow_dirty);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1952
      r->object_iterate(&not_dead_yet_cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1953
      guarantee(r->max_live_bytes() >= not_dead_yet_cl.live_bytes(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1954
                "More live objects than counted in last complete marking.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1955
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1956
    return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1957
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1958
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1959
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1960
class VerifyRootsClosure: public OopsInGenClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1961
private:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1962
  G1CollectedHeap* _g1h;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1963
  bool             _failures;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1964
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1965
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1966
  VerifyRootsClosure() :
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1967
    _g1h(G1CollectedHeap::heap()), _failures(false) { }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1968
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1969
  bool failures() { return _failures; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1970
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1971
  void do_oop(narrowOop* p) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1972
    guarantee(false, "NYI");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1973
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1974
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1975
  void do_oop(oop* p) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1976
    oop obj = *p;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1977
    if (obj != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1978
      if (_g1h->is_obj_dead(obj)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1979
        gclog_or_tty->print_cr("Root location "PTR_FORMAT" "
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1980
                               "points to dead obj "PTR_FORMAT, p, (void*) obj);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1981
        obj->print_on(gclog_or_tty);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1982
        _failures = true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1983
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1984
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1985
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1986
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1987
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1988
void G1CollectedHeap::verify(bool allow_dirty, bool silent) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1989
  if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1990
    if (!silent) { gclog_or_tty->print("roots "); }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1991
    VerifyRootsClosure rootsCl;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1992
    process_strong_roots(false,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1993
                         SharedHeap::SO_AllClasses,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1994
                         &rootsCl,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1995
                         &rootsCl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1996
    rem_set()->invalidate(perm_gen()->used_region(), false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1997
    if (!silent) { gclog_or_tty->print("heapRegions "); }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1998
    VerifyRegionClosure blk(allow_dirty);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1999
    _hrs->iterate(&blk);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2000
    if (!silent) gclog_or_tty->print("remset ");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2001
    rem_set()->verify();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2002
    guarantee(!rootsCl.failures(), "should not have had failures");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2003
  } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2004
    if (!silent) gclog_or_tty->print("(SKIPPING roots, heapRegions, remset) ");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2005
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2006
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2007
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2008
class PrintRegionClosure: public HeapRegionClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2009
  outputStream* _st;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2010
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2011
  PrintRegionClosure(outputStream* st) : _st(st) {}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2012
  bool doHeapRegion(HeapRegion* r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2013
    r->print_on(_st);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2014
    return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2015
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2016
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2017
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2018
void G1CollectedHeap::print() const { print_on(gclog_or_tty); }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2019
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2020
void G1CollectedHeap::print_on(outputStream* st) const {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2021
  PrintRegionClosure blk(st);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2022
  _hrs->iterate(&blk);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2023
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2024
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2025
void G1CollectedHeap::print_gc_threads_on(outputStream* st) const {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2026
  if (ParallelGCThreads > 0) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2027
    workers()->print_worker_threads();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2028
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2029
  st->print("\"G1 concurrent mark GC Thread\" ");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2030
  _cmThread->print();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2031
  st->cr();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2032
  st->print("\"G1 concurrent refinement GC Thread\" ");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2033
  _cg1r->cg1rThread()->print_on(st);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2034
  st->cr();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2035
  st->print("\"G1 zero-fill GC Thread\" ");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2036
  _czft->print_on(st);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2037
  st->cr();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2038
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2039
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2040
void G1CollectedHeap::gc_threads_do(ThreadClosure* tc) const {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2041
  if (ParallelGCThreads > 0) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2042
    workers()->threads_do(tc);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2043
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2044
  tc->do_thread(_cmThread);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2045
  tc->do_thread(_cg1r->cg1rThread());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2046
  tc->do_thread(_czft);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2047
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2048
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2049
void G1CollectedHeap::print_tracing_info() const {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2050
  concurrent_g1_refine()->print_final_card_counts();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2051
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2052
  // We'll overload this to mean "trace GC pause statistics."
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2053
  if (TraceGen0Time || TraceGen1Time) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2054
    // The "G1CollectorPolicy" is keeping track of these stats, so delegate
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2055
    // to that.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2056
    g1_policy()->print_tracing_info();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2057
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2058
  if (SummarizeG1RSStats) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2059
    g1_rem_set()->print_summary_info();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2060
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2061
  if (SummarizeG1ConcMark) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2062
    concurrent_mark()->print_summary_info();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2063
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2064
  if (SummarizeG1ZFStats) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2065
    ConcurrentZFThread::print_summary_info();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2066
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2067
  if (G1SummarizePopularity) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2068
    print_popularity_summary_info();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2069
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2070
  g1_policy()->print_yg_surv_rate_info();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2071
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2072
  GCOverheadReporter::printGCOverhead();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2073
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2074
  SpecializationStats::print();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2075
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2076
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2077
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2078
int G1CollectedHeap::addr_to_arena_id(void* addr) const {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2079
  HeapRegion* hr = heap_region_containing(addr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2080
  if (hr == NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2081
    return 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2082
  } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2083
    return 1;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2084
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2085
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2086
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2087
G1CollectedHeap* G1CollectedHeap::heap() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2088
  assert(_sh->kind() == CollectedHeap::G1CollectedHeap,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2089
         "not a garbage-first heap");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2090
  return _g1h;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2091
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2092
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2093
void G1CollectedHeap::gc_prologue(bool full /* Ignored */) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2094
  if (PrintHeapAtGC){
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2095
    gclog_or_tty->print_cr(" {Heap before GC collections=%d:", total_collections());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2096
    Universe::print();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2097
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2098
  assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2099
  // Call allocation profiler
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2100
  AllocationProfiler::iterate_since_last_gc();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2101
  // Fill TLAB's and such
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2102
  ensure_parsability(true);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2103
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2104
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2105
void G1CollectedHeap::gc_epilogue(bool full /* Ignored */) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2106
  // FIXME: what is this about?
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2107
  // I'm ignoring the "fill_newgen()" call if "alloc_event_enabled"
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2108
  // is set.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2109
  COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2110
                        "derived pointer present"));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2111
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2112
  if (PrintHeapAtGC){
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2113
    gclog_or_tty->print_cr(" Heap after GC collections=%d:", total_collections());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2114
    Universe::print();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2115
    gclog_or_tty->print("} ");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2116
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2117
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2118
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2119
void G1CollectedHeap::do_collection_pause() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2120
  // Read the GC count while holding the Heap_lock
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2121
  // we need to do this _before_ wait_for_cleanup_complete(), to
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2122
  // ensure that we do not give up the heap lock and potentially
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2123
  // pick up the wrong count
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2124
  int gc_count_before = SharedHeap::heap()->total_collections();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2125
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2126
  // Don't want to do a GC pause while cleanup is being completed!
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2127
  wait_for_cleanup_complete();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2128
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2129
  g1_policy()->record_stop_world_start();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2130
  {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2131
    MutexUnlocker mu(Heap_lock);  // give up heap lock, execute gets it back
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2132
    VM_G1IncCollectionPause op(gc_count_before);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2133
    VMThread::execute(&op);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2134
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2135
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2136
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2137
void
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2138
G1CollectedHeap::doConcurrentMark() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2139
  if (G1ConcMark) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2140
    MutexLockerEx x(CGC_lock, Mutex::_no_safepoint_check_flag);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2141
    if (!_cmThread->in_progress()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2142
      _cmThread->set_started();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2143
      CGC_lock->notify();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2144
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2145
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2146
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2147
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2148
class VerifyMarkedObjsClosure: public ObjectClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2149
    G1CollectedHeap* _g1h;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2150
    public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2151
    VerifyMarkedObjsClosure(G1CollectedHeap* g1h) : _g1h(g1h) {}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2152
    void do_object(oop obj) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2153
      assert(obj->mark()->is_marked() ? !_g1h->is_obj_dead(obj) : true,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2154
             "markandsweep mark should agree with concurrent deadness");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2155
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2156
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2157
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2158
void
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2159
G1CollectedHeap::checkConcurrentMark() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2160
    VerifyMarkedObjsClosure verifycl(this);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2161
    doConcurrentMark();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2162
    //    MutexLockerEx x(getMarkBitMapLock(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2163
    //              Mutex::_no_safepoint_check_flag);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2164
    object_iterate(&verifycl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2165
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2166
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2167
void G1CollectedHeap::do_sync_mark() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2168
  _cm->checkpointRootsInitial();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2169
  _cm->markFromRoots();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2170
  _cm->checkpointRootsFinal(false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2171
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2172
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2173
// <NEW PREDICTION>
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2174
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2175
double G1CollectedHeap::predict_region_elapsed_time_ms(HeapRegion *hr,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2176
                                                       bool young) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2177
  return _g1_policy->predict_region_elapsed_time_ms(hr, young);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2178
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2179
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2180
void G1CollectedHeap::check_if_region_is_too_expensive(double
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2181
                                                           predicted_time_ms) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2182
  _g1_policy->check_if_region_is_too_expensive(predicted_time_ms);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2183
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2184
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2185
size_t G1CollectedHeap::pending_card_num() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2186
  size_t extra_cards = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2187
  JavaThread *curr = Threads::first();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2188
  while (curr != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2189
    DirtyCardQueue& dcq = curr->dirty_card_queue();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2190
    extra_cards += dcq.size();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2191
    curr = curr->next();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2192
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2193
  DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2194
  size_t buffer_size = dcqs.buffer_size();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2195
  size_t buffer_num = dcqs.completed_buffers_num();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2196
  return buffer_size * buffer_num + extra_cards;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2197
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2198
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2199
size_t G1CollectedHeap::max_pending_card_num() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2200
  DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2201
  size_t buffer_size = dcqs.buffer_size();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2202
  size_t buffer_num  = dcqs.completed_buffers_num();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2203
  int thread_num  = Threads::number_of_threads();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2204
  return (buffer_num + thread_num) * buffer_size;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2205
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2206
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2207
size_t G1CollectedHeap::cards_scanned() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2208
  HRInto_G1RemSet* g1_rset = (HRInto_G1RemSet*) g1_rem_set();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2209
  return g1_rset->cardsScanned();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2210
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2211
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2212
void
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2213
G1CollectedHeap::setup_surviving_young_words() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2214
  guarantee( _surviving_young_words == NULL, "pre-condition" );
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2215
  size_t array_length = g1_policy()->young_cset_length();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2216
  _surviving_young_words = NEW_C_HEAP_ARRAY(size_t, array_length);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2217
  if (_surviving_young_words == NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2218
    vm_exit_out_of_memory(sizeof(size_t) * array_length,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2219
                          "Not enough space for young surv words summary.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2220
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2221
  memset(_surviving_young_words, 0, array_length * sizeof(size_t));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2222
  for (size_t i = 0;  i < array_length; ++i) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2223
    guarantee( _surviving_young_words[i] == 0, "invariant" );
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2224
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2225
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2226
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2227
void
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2228
G1CollectedHeap::update_surviving_young_words(size_t* surv_young_words) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2229
  MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2230
  size_t array_length = g1_policy()->young_cset_length();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2231
  for (size_t i = 0; i < array_length; ++i)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2232
    _surviving_young_words[i] += surv_young_words[i];
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2233
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2234
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2235
void
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2236
G1CollectedHeap::cleanup_surviving_young_words() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2237
  guarantee( _surviving_young_words != NULL, "pre-condition" );
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2238
  FREE_C_HEAP_ARRAY(size_t, _surviving_young_words);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2239
  _surviving_young_words = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2240
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2241
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2242
// </NEW PREDICTION>
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2243
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2244
void
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2245
G1CollectedHeap::do_collection_pause_at_safepoint(HeapRegion* popular_region) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2246
  char verbose_str[128];
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2247
  sprintf(verbose_str, "GC pause ");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2248
  if (popular_region != NULL)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2249
    strcat(verbose_str, "(popular)");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2250
  else if (g1_policy()->in_young_gc_mode()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2251
    if (g1_policy()->full_young_gcs())
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2252
      strcat(verbose_str, "(young)");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2253
    else
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2254
      strcat(verbose_str, "(partial)");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2255
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2256
  bool reset_should_initiate_conc_mark = false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2257
  if (popular_region != NULL && g1_policy()->should_initiate_conc_mark()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2258
    // we currently do not allow an initial mark phase to be piggy-backed
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2259
    // on a popular pause
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2260
    reset_should_initiate_conc_mark = true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2261
    g1_policy()->unset_should_initiate_conc_mark();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2262
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2263
  if (g1_policy()->should_initiate_conc_mark())
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2264
    strcat(verbose_str, " (initial-mark)");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2265
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2266
  GCCauseSetter x(this, (popular_region == NULL ?
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2267
                         GCCause::_g1_inc_collection_pause :
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2268
                         GCCause::_g1_pop_region_collection_pause));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2269
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2270
  // if PrintGCDetails is on, we'll print long statistics information
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2271
  // in the collector policy code, so let's not print this as the output
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2272
  // is messy if we do.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2273
  gclog_or_tty->date_stamp(PrintGC && PrintGCDateStamps);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2274
  TraceCPUTime tcpu(PrintGCDetails, true, gclog_or_tty);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2275
  TraceTime t(verbose_str, PrintGC && !PrintGCDetails, true, gclog_or_tty);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2276
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2277
  ResourceMark rm;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2278
  assert(SafepointSynchronize::is_at_safepoint(), "should be at safepoint");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2279
  assert(Thread::current() == VMThread::vm_thread(), "should be in vm thread");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2280
  guarantee(!is_gc_active(), "collection is not reentrant");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2281
  assert(regions_accounted_for(), "Region leakage!");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2282
  ++_gc_time_stamp;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2283
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2284
  if (g1_policy()->in_young_gc_mode()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2285
    assert(check_young_list_well_formed(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2286
                "young list should be well formed");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2287
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2288
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2289
  if (GC_locker::is_active()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2290
    return; // GC is disabled (e.g. JNI GetXXXCritical operation)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2291
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2292
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2293
  bool abandoned = false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2294
  { // Call to jvmpi::post_class_unload_events must occur outside of active GC
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2295
    IsGCActiveMark x;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2296
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2297
    gc_prologue(false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2298
    increment_total_collections();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2299
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2300
#if G1_REM_SET_LOGGING
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2301
    gclog_or_tty->print_cr("\nJust chose CS, heap:");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2302
    print();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2303
#endif
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2304
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2305
    if (VerifyBeforeGC && total_collections() >= VerifyGCStartAt) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2306
      HandleMark hm;  // Discard invalid handles created during verification
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2307
      prepare_for_verify();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2308
      gclog_or_tty->print(" VerifyBeforeGC:");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2309
      Universe::verify(false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2310
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2311
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2312
    COMPILER2_PRESENT(DerivedPointerTable::clear());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2313
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2314
    // We want to turn off ref discovere, if necessary, and turn it back on
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2315
    // on again later if we do.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2316
    bool was_enabled = ref_processor()->discovery_enabled();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2317
    if (was_enabled) ref_processor()->disable_discovery();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2318
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2319
    // Forget the current alloc region (we might even choose it to be part
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2320
    // of the collection set!).
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2321
    abandon_cur_alloc_region();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2322
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2323
    // The elapsed time induced by the start time below deliberately elides
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2324
    // the possible verification above.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2325
    double start_time_sec = os::elapsedTime();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2326
    GCOverheadReporter::recordSTWStart(start_time_sec);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2327
    size_t start_used_bytes = used();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2328
    if (!G1ConcMark) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2329
      do_sync_mark();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2330
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2331
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2332
    g1_policy()->record_collection_pause_start(start_time_sec,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2333
                                               start_used_bytes);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2334
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2335
#if SCAN_ONLY_VERBOSE
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2336
    _young_list->print();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2337
#endif // SCAN_ONLY_VERBOSE
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2338
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2339
    if (g1_policy()->should_initiate_conc_mark()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2340
      concurrent_mark()->checkpointRootsInitialPre();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2341
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2342
    save_marks();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2343
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2344
    // We must do this before any possible evacuation that should propogate
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2345
    // marks, including evacuation of popular objects in a popular pause.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2346
    if (mark_in_progress()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2347
      double start_time_sec = os::elapsedTime();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2348
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2349
      _cm->drainAllSATBBuffers();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2350
      double finish_mark_ms = (os::elapsedTime() - start_time_sec) * 1000.0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2351
      g1_policy()->record_satb_drain_time(finish_mark_ms);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2352
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2353
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2354
    // Record the number of elements currently on the mark stack, so we
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2355
    // only iterate over these.  (Since evacuation may add to the mark
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2356
    // stack, doing more exposes race conditions.)  If no mark is in
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2357
    // progress, this will be zero.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2358
    _cm->set_oops_do_bound();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2359
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2360
    assert(regions_accounted_for(), "Region leakage.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2361
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2362
    bool abandoned = false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2363
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2364
    if (mark_in_progress())
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2365
      concurrent_mark()->newCSet();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2366
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2367
    // Now choose the CS.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2368
    if (popular_region == NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2369
      g1_policy()->choose_collection_set();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2370
    } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2371
      // We may be evacuating a single region (for popularity).
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2372
      g1_policy()->record_popular_pause_preamble_start();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2373
      popularity_pause_preamble(popular_region);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2374
      g1_policy()->record_popular_pause_preamble_end();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2375
      abandoned = (g1_policy()->collection_set() == NULL);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2376
      // Now we allow more regions to be added (we have to collect
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2377
      // all popular regions).
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2378
      if (!abandoned) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2379
        g1_policy()->choose_collection_set(popular_region);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2380
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2381
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2382
    // We may abandon a pause if we find no region that will fit in the MMU
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2383
    // pause.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2384
    abandoned = (g1_policy()->collection_set() == NULL);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2385
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2386
    // Nothing to do if we were unable to choose a collection set.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2387
    if (!abandoned) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2388
#if G1_REM_SET_LOGGING
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2389
      gclog_or_tty->print_cr("\nAfter pause, heap:");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2390
      print();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2391
#endif
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2392
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2393
      setup_surviving_young_words();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2394
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2395
      // Set up the gc allocation regions.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2396
      get_gc_alloc_regions();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2397
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2398
      // Actually do the work...
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2399
      evacuate_collection_set();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2400
      free_collection_set(g1_policy()->collection_set());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2401
      g1_policy()->clear_collection_set();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2402
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2403
      if (popular_region != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2404
        // We have to wait until now, because we don't want the region to
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2405
        // be rescheduled for pop-evac during RS update.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2406
        popular_region->set_popular_pending(false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2407
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2408
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2409
      release_gc_alloc_regions();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2410
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2411
      cleanup_surviving_young_words();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2412
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2413
      if (g1_policy()->in_young_gc_mode()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2414
        _young_list->reset_sampled_info();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2415
        assert(check_young_list_empty(true),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2416
               "young list should be empty");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2417
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2418
#if SCAN_ONLY_VERBOSE
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2419
        _young_list->print();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2420
#endif // SCAN_ONLY_VERBOSE
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2421
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2422
        _young_list->reset_auxilary_lists();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2423
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2424
    } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2425
      COMPILER2_PRESENT(DerivedPointerTable::update_pointers());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2426
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2427
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2428
    if (evacuation_failed()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2429
      _summary_bytes_used = recalculate_used();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2430
    } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2431
      // The "used" of the the collection set have already been subtracted
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2432
      // when they were freed.  Add in the bytes evacuated.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2433
      _summary_bytes_used += g1_policy()->bytes_in_to_space();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2434
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2435
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2436
    if (g1_policy()->in_young_gc_mode() &&
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2437
        g1_policy()->should_initiate_conc_mark()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2438
      concurrent_mark()->checkpointRootsInitialPost();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2439
      set_marking_started();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2440
      doConcurrentMark();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2441
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2442
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2443
#if SCAN_ONLY_VERBOSE
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2444
    _young_list->print();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2445
#endif // SCAN_ONLY_VERBOSE
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2446
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2447
    double end_time_sec = os::elapsedTime();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2448
    g1_policy()->record_pause_time((end_time_sec - start_time_sec)*1000.0);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2449
    GCOverheadReporter::recordSTWEnd(end_time_sec);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2450
    g1_policy()->record_collection_pause_end(popular_region != NULL,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2451
                                             abandoned);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2452
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2453
    assert(regions_accounted_for(), "Region leakage.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2454
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2455
    if (VerifyAfterGC && total_collections() >= VerifyGCStartAt) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2456
      HandleMark hm;  // Discard invalid handles created during verification
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2457
      gclog_or_tty->print(" VerifyAfterGC:");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2458
      Universe::verify(false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2459
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2460
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2461
    if (was_enabled) ref_processor()->enable_discovery();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2462
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2463
    {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2464
      size_t expand_bytes = g1_policy()->expansion_amount();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2465
      if (expand_bytes > 0) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2466
        size_t bytes_before = capacity();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2467
        expand(expand_bytes);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2468
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2469
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2470
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2471
    if (mark_in_progress())
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2472
      concurrent_mark()->update_g1_committed();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2473
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2474
    gc_epilogue(false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2475
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2476
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2477
  assert(verify_region_lists(), "Bad region lists.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2478
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2479
  if (reset_should_initiate_conc_mark)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2480
    g1_policy()->set_should_initiate_conc_mark();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2481
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2482
  if (ExitAfterGCNum > 0 && total_collections() == ExitAfterGCNum) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2483
    gclog_or_tty->print_cr("Stopping after GC #%d", ExitAfterGCNum);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2484
    print_tracing_info();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2485
    vm_exit(-1);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2486
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2487
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2488
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2489
void G1CollectedHeap::set_gc_alloc_region(int purpose, HeapRegion* r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2490
  assert(purpose >= 0 && purpose < GCAllocPurposeCount, "invalid purpose");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2491
  HeapWord* original_top = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2492
  if (r != NULL)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2493
    original_top = r->top();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2494
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2495
  // We will want to record the used space in r as being there before gc.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2496
  // One we install it as a GC alloc region it's eligible for allocation.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2497
  // So record it now and use it later.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2498
  size_t r_used = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2499
  if (r != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2500
    r_used = r->used();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2501
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2502
    if (ParallelGCThreads > 0) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2503
      // need to take the lock to guard against two threads calling
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2504
      // get_gc_alloc_region concurrently (very unlikely but...)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2505
      MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2506
      r->save_marks();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2507
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2508
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2509
  HeapRegion* old_alloc_region = _gc_alloc_regions[purpose];
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2510
  _gc_alloc_regions[purpose] = r;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2511
  if (old_alloc_region != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2512
    // Replace aliases too.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2513
    for (int ap = 0; ap < GCAllocPurposeCount; ++ap) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2514
      if (_gc_alloc_regions[ap] == old_alloc_region) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2515
        _gc_alloc_regions[ap] = r;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2516
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2517
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2518
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2519
  if (r != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2520
    push_gc_alloc_region(r);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2521
    if (mark_in_progress() && original_top != r->next_top_at_mark_start()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2522
      // We are using a region as a GC alloc region after it has been used
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2523
      // as a mutator allocation region during the current marking cycle.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2524
      // The mutator-allocated objects are currently implicitly marked, but
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2525
      // when we move hr->next_top_at_mark_start() forward at the the end
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2526
      // of the GC pause, they won't be.  We therefore mark all objects in
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2527
      // the "gap".  We do this object-by-object, since marking densely
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2528
      // does not currently work right with marking bitmap iteration.  This
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2529
      // means we rely on TLAB filling at the start of pauses, and no
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2530
      // "resuscitation" of filled TLAB's.  If we want to do this, we need
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2531
      // to fix the marking bitmap iteration.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2532
      HeapWord* curhw = r->next_top_at_mark_start();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2533
      HeapWord* t = original_top;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2534
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2535
      while (curhw < t) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2536
        oop cur = (oop)curhw;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2537
        // We'll assume parallel for generality.  This is rare code.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2538
        concurrent_mark()->markAndGrayObjectIfNecessary(cur); // can't we just mark them?
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2539
        curhw = curhw + cur->size();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2540
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2541
      assert(curhw == t, "Should have parsed correctly.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2542
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2543
    if (G1PolicyVerbose > 1) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2544
      gclog_or_tty->print("New alloc region ["PTR_FORMAT", "PTR_FORMAT", " PTR_FORMAT") "
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2545
                          "for survivors:", r->bottom(), original_top, r->end());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2546
      r->print();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2547
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2548
    g1_policy()->record_before_bytes(r_used);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2549
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2550
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2551
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2552
void G1CollectedHeap::push_gc_alloc_region(HeapRegion* hr) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2553
  assert(Thread::current()->is_VM_thread() ||
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2554
         par_alloc_during_gc_lock()->owned_by_self(), "Precondition");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2555
  assert(!hr->is_gc_alloc_region() && !hr->in_collection_set(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2556
         "Precondition.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2557
  hr->set_is_gc_alloc_region(true);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2558
  hr->set_next_gc_alloc_region(_gc_alloc_region_list);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2559
  _gc_alloc_region_list = hr;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2560
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2561
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2562
#ifdef G1_DEBUG
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2563
class FindGCAllocRegion: public HeapRegionClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2564
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2565
  bool doHeapRegion(HeapRegion* r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2566
    if (r->is_gc_alloc_region()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2567
      gclog_or_tty->print_cr("Region %d ["PTR_FORMAT"...] is still a gc_alloc_region.",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2568
                             r->hrs_index(), r->bottom());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2569
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2570
    return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2571
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2572
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2573
#endif // G1_DEBUG
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2574
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2575
void G1CollectedHeap::forget_alloc_region_list() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2576
  assert(Thread::current()->is_VM_thread(), "Precondition");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2577
  while (_gc_alloc_region_list != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2578
    HeapRegion* r = _gc_alloc_region_list;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2579
    assert(r->is_gc_alloc_region(), "Invariant.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2580
    _gc_alloc_region_list = r->next_gc_alloc_region();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2581
    r->set_next_gc_alloc_region(NULL);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2582
    r->set_is_gc_alloc_region(false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2583
    if (r->is_empty()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2584
      ++_free_regions;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2585
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2586
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2587
#ifdef G1_DEBUG
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2588
  FindGCAllocRegion fa;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2589
  heap_region_iterate(&fa);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2590
#endif // G1_DEBUG
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2591
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2592
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2593
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2594
bool G1CollectedHeap::check_gc_alloc_regions() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2595
  // TODO: allocation regions check
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2596
  return true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2597
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2598
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2599
void G1CollectedHeap::get_gc_alloc_regions() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2600
  for (int ap = 0; ap < GCAllocPurposeCount; ++ap) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2601
    // Create new GC alloc regions.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2602
    HeapRegion* alloc_region = _gc_alloc_regions[ap];
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2603
    // Clear this alloc region, so that in case it turns out to be
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2604
    // unacceptable, we end up with no allocation region, rather than a bad
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2605
    // one.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2606
    _gc_alloc_regions[ap] = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2607
    if (alloc_region == NULL || alloc_region->in_collection_set()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2608
      // Can't re-use old one.  Allocate a new one.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2609
      alloc_region = newAllocRegionWithExpansion(ap, 0);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2610
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2611
    if (alloc_region != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2612
      set_gc_alloc_region(ap, alloc_region);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2613
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2614
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2615
  // Set alternative regions for allocation purposes that have reached
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2616
  // thier limit.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2617
  for (int ap = 0; ap < GCAllocPurposeCount; ++ap) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2618
    GCAllocPurpose alt_purpose = g1_policy()->alternative_purpose(ap);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2619
    if (_gc_alloc_regions[ap] == NULL && alt_purpose != ap) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2620
      _gc_alloc_regions[ap] = _gc_alloc_regions[alt_purpose];
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2621
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2622
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2623
  assert(check_gc_alloc_regions(), "alloc regions messed up");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2624
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2625
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2626
void G1CollectedHeap::release_gc_alloc_regions() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2627
  // We keep a separate list of all regions that have been alloc regions in
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2628
  // the current collection pause.  Forget that now.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2629
  forget_alloc_region_list();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2630
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2631
  // The current alloc regions contain objs that have survived
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2632
  // collection. Make them no longer GC alloc regions.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2633
  for (int ap = 0; ap < GCAllocPurposeCount; ++ap) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2634
    HeapRegion* r = _gc_alloc_regions[ap];
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2635
    if (r != NULL && r->is_empty()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2636
      {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2637
        MutexLockerEx x(ZF_mon, Mutex::_no_safepoint_check_flag);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2638
        r->set_zero_fill_complete();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2639
        put_free_region_on_list_locked(r);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2640
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2641
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2642
    // set_gc_alloc_region will also NULLify all aliases to the region
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2643
    set_gc_alloc_region(ap, NULL);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2644
    _gc_alloc_region_counts[ap] = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2645
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2646
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2647
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2648
void G1CollectedHeap::init_for_evac_failure(OopsInHeapRegionClosure* cl) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2649
  _drain_in_progress = false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2650
  set_evac_failure_closure(cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2651
  _evac_failure_scan_stack = new (ResourceObj::C_HEAP) GrowableArray<oop>(40, true);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2652
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2653
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2654
void G1CollectedHeap::finalize_for_evac_failure() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2655
  assert(_evac_failure_scan_stack != NULL &&
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2656
         _evac_failure_scan_stack->length() == 0,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2657
         "Postcondition");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2658
  assert(!_drain_in_progress, "Postcondition");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2659
  // Don't have to delete, since the scan stack is a resource object.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2660
  _evac_failure_scan_stack = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2661
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2662
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2663
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2664
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2665
// *** Sequential G1 Evacuation
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2666
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2667
HeapWord* G1CollectedHeap::allocate_during_gc(GCAllocPurpose purpose, size_t word_size) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2668
  HeapRegion* alloc_region = _gc_alloc_regions[purpose];
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2669
  // let the caller handle alloc failure
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2670
  if (alloc_region == NULL) return NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2671
  assert(isHumongous(word_size) || !alloc_region->isHumongous(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2672
         "Either the object is humongous or the region isn't");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2673
  HeapWord* block = alloc_region->allocate(word_size);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2674
  if (block == NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2675
    block = allocate_during_gc_slow(purpose, alloc_region, false, word_size);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2676
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2677
  return block;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2678
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2679
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2680
class G1IsAliveClosure: public BoolObjectClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2681
  G1CollectedHeap* _g1;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2682
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2683
  G1IsAliveClosure(G1CollectedHeap* g1) : _g1(g1) {}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2684
  void do_object(oop p) { assert(false, "Do not call."); }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2685
  bool do_object_b(oop p) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2686
    // It is reachable if it is outside the collection set, or is inside
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2687
    // and forwarded.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2688
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2689
#ifdef G1_DEBUG
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2690
    gclog_or_tty->print_cr("is alive "PTR_FORMAT" in CS %d forwarded %d overall %d",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2691
                           (void*) p, _g1->obj_in_cs(p), p->is_forwarded(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2692
                           !_g1->obj_in_cs(p) || p->is_forwarded());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2693
#endif // G1_DEBUG
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2694
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2695
    return !_g1->obj_in_cs(p) || p->is_forwarded();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2696
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2697
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2698
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2699
class G1KeepAliveClosure: public OopClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2700
  G1CollectedHeap* _g1;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2701
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2702
  G1KeepAliveClosure(G1CollectedHeap* g1) : _g1(g1) {}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2703
  void do_oop(narrowOop* p) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2704
    guarantee(false, "NYI");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2705
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2706
  void do_oop(oop* p) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2707
    oop obj = *p;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2708
#ifdef G1_DEBUG
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2709
    if (PrintGC && Verbose) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2710
      gclog_or_tty->print_cr("keep alive *"PTR_FORMAT" = "PTR_FORMAT" "PTR_FORMAT,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2711
                             p, (void*) obj, (void*) *p);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2712
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2713
#endif // G1_DEBUG
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2714
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2715
    if (_g1->obj_in_cs(obj)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2716
      assert( obj->is_forwarded(), "invariant" );
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2717
      *p = obj->forwardee();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2718
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2719
#ifdef G1_DEBUG
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2720
      gclog_or_tty->print_cr("     in CSet: moved "PTR_FORMAT" -> "PTR_FORMAT,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2721
                             (void*) obj, (void*) *p);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2722
#endif // G1_DEBUG
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2723
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2724
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2725
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2726
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2727
class RecreateRSetEntriesClosure: public OopClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2728
private:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2729
  G1CollectedHeap* _g1;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2730
  G1RemSet* _g1_rem_set;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2731
  HeapRegion* _from;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2732
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2733
  RecreateRSetEntriesClosure(G1CollectedHeap* g1, HeapRegion* from) :
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2734
    _g1(g1), _g1_rem_set(g1->g1_rem_set()), _from(from)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2735
  {}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2736
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2737
  void do_oop(narrowOop* p) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2738
    guarantee(false, "NYI");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2739
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2740
  void do_oop(oop* p) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2741
    assert(_from->is_in_reserved(p), "paranoia");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2742
    if (*p != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2743
      _g1_rem_set->write_ref(_from, p);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2744
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2745
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2746
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2747
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2748
class RemoveSelfPointerClosure: public ObjectClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2749
private:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2750
  G1CollectedHeap* _g1;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2751
  ConcurrentMark* _cm;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2752
  HeapRegion* _hr;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2753
  HeapWord* _last_self_forwarded_end;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2754
  size_t _prev_marked_bytes;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2755
  size_t _next_marked_bytes;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2756
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2757
  RemoveSelfPointerClosure(G1CollectedHeap* g1, HeapRegion* hr) :
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2758
    _g1(g1), _cm(_g1->concurrent_mark()), _hr(hr),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2759
    _last_self_forwarded_end(_hr->bottom()),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2760
    _prev_marked_bytes(0), _next_marked_bytes(0)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2761
  {}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2762
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2763
  size_t prev_marked_bytes() { return _prev_marked_bytes; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2764
  size_t next_marked_bytes() { return _next_marked_bytes; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2765
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2766
  void fill_remainder() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2767
    HeapWord* limit = _hr->top();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2768
    MemRegion mr(_last_self_forwarded_end, limit);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2769
    if (!mr.is_empty()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2770
      SharedHeap::fill_region_with_object(mr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2771
      _cm->clearRangeBothMaps(mr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2772
      _hr->declare_filled_region_to_BOT(mr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2773
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2774
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2775
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2776
  void do_object(oop obj) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2777
    if (obj->is_forwarded()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2778
      if (obj->forwardee() == obj) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2779
        assert(!_g1->is_obj_dead(obj), "We should not be preserving dead objs.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2780
        _cm->markPrev(obj);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2781
        assert(_cm->isPrevMarked(obj), "Should be marked!");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2782
        _prev_marked_bytes += (obj->size() * HeapWordSize);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2783
        if (_g1->mark_in_progress() && !_g1->is_obj_ill(obj)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2784
          _cm->markAndGrayObjectIfNecessary(obj);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2785
        }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2786
        HeapWord* obj_start = (HeapWord*)obj;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2787
        if (obj_start > _last_self_forwarded_end) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2788
          MemRegion mr(_last_self_forwarded_end, obj_start);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2789
          SharedHeap::fill_region_with_object(mr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2790
          assert(_cm->isPrevMarked(obj), "Should be marked!");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2791
          _cm->clearRangeBothMaps(mr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2792
          assert(_cm->isPrevMarked(obj), "Should be marked!");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2793
          _hr->declare_filled_region_to_BOT(mr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2794
        }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2795
        _last_self_forwarded_end = obj_start + obj->size();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2796
        obj->set_mark(markOopDesc::prototype());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2797
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2798
        // While we were processing RSet buffers during the
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2799
        // collection, we actually didn't scan any cards on the
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2800
        // collection set, since we didn't want to update remebered
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2801
        // sets with entries that point into the collection set, given
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2802
        // that live objects fromthe collection set are about to move
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2803
        // and such entries will be stale very soon. This change also
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2804
        // dealt with a reliability issue which involved scanning a
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2805
        // card in the collection set and coming across an array that
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2806
        // was being chunked and looking malformed. The problem is
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2807
        // that, if evacuation fails, we might have remembered set
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2808
        // entries missing given that we skipped cards on the
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2809
        // collection set. So, we'll recreate such entries now.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2810
        RecreateRSetEntriesClosure cl(_g1, _hr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2811
        obj->oop_iterate(&cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2812
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2813
        assert(_cm->isPrevMarked(obj), "Should be marked!");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2814
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2815
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2816
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2817
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2818
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2819
void G1CollectedHeap::remove_self_forwarding_pointers() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2820
  HeapRegion* cur = g1_policy()->collection_set();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2821
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2822
  while (cur != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2823
    assert(g1_policy()->assertMarkedBytesDataOK(), "Should be!");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2824
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2825
    if (cur->evacuation_failed()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2826
      RemoveSelfPointerClosure rspc(_g1h, cur);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2827
      assert(cur->in_collection_set(), "bad CS");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2828
      cur->object_iterate(&rspc);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2829
      rspc.fill_remainder();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2830
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2831
      // A number of manipulations to make the TAMS be the current top,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2832
      // and the marked bytes be the ones observed in the iteration.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2833
      if (_g1h->concurrent_mark()->at_least_one_mark_complete()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2834
        // The comments below are the postconditions achieved by the
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2835
        // calls.  Note especially the last such condition, which says that
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2836
        // the count of marked bytes has been properly restored.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2837
        cur->note_start_of_marking(false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2838
        // _next_top_at_mark_start == top, _next_marked_bytes == 0
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2839
        cur->add_to_marked_bytes(rspc.prev_marked_bytes());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2840
        // _next_marked_bytes == prev_marked_bytes.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2841
        cur->note_end_of_marking();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2842
        // _prev_top_at_mark_start == top(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2843
        // _prev_marked_bytes == prev_marked_bytes
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2844
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2845
      // If there is no mark in progress, we modified the _next variables
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2846
      // above needlessly, but harmlessly.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2847
      if (_g1h->mark_in_progress()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2848
        cur->note_start_of_marking(false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2849
        // _next_top_at_mark_start == top, _next_marked_bytes == 0
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2850
        // _next_marked_bytes == next_marked_bytes.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2851
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2852
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2853
      // Now make sure the region has the right index in the sorted array.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2854
      g1_policy()->note_change_in_marked_bytes(cur);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2855
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2856
    cur = cur->next_in_collection_set();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2857
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2858
  assert(g1_policy()->assertMarkedBytesDataOK(), "Should be!");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2859
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2860
  // Now restore saved marks, if any.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2861
  if (_objs_with_preserved_marks != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2862
    assert(_preserved_marks_of_objs != NULL, "Both or none.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2863
    assert(_objs_with_preserved_marks->length() ==
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2864
           _preserved_marks_of_objs->length(), "Both or none.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2865
    guarantee(_objs_with_preserved_marks->length() ==
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2866
              _preserved_marks_of_objs->length(), "Both or none.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2867
    for (int i = 0; i < _objs_with_preserved_marks->length(); i++) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2868
      oop obj   = _objs_with_preserved_marks->at(i);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2869
      markOop m = _preserved_marks_of_objs->at(i);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2870
      obj->set_mark(m);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2871
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2872
    // Delete the preserved marks growable arrays (allocated on the C heap).
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2873
    delete _objs_with_preserved_marks;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2874
    delete _preserved_marks_of_objs;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2875
    _objs_with_preserved_marks = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2876
    _preserved_marks_of_objs = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2877
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2878
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2879
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2880
void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2881
  _evac_failure_scan_stack->push(obj);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2882
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2883
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2884
void G1CollectedHeap::drain_evac_failure_scan_stack() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2885
  assert(_evac_failure_scan_stack != NULL, "precondition");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2886
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2887
  while (_evac_failure_scan_stack->length() > 0) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2888
     oop obj = _evac_failure_scan_stack->pop();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2889
     _evac_failure_closure->set_region(heap_region_containing(obj));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2890
     obj->oop_iterate_backwards(_evac_failure_closure);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2891
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2892
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2893
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2894
void G1CollectedHeap::handle_evacuation_failure(oop old) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2895
  markOop m = old->mark();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2896
  // forward to self
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2897
  assert(!old->is_forwarded(), "precondition");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2898
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2899
  old->forward_to(old);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2900
  handle_evacuation_failure_common(old, m);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2901
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2902
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2903
oop
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2904
G1CollectedHeap::handle_evacuation_failure_par(OopsInHeapRegionClosure* cl,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2905
                                               oop old) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2906
  markOop m = old->mark();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2907
  oop forward_ptr = old->forward_to_atomic(old);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2908
  if (forward_ptr == NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2909
    // Forward-to-self succeeded.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2910
    if (_evac_failure_closure != cl) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2911
      MutexLockerEx x(EvacFailureStack_lock, Mutex::_no_safepoint_check_flag);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2912
      assert(!_drain_in_progress,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2913
             "Should only be true while someone holds the lock.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2914
      // Set the global evac-failure closure to the current thread's.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2915
      assert(_evac_failure_closure == NULL, "Or locking has failed.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2916
      set_evac_failure_closure(cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2917
      // Now do the common part.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2918
      handle_evacuation_failure_common(old, m);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2919
      // Reset to NULL.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2920
      set_evac_failure_closure(NULL);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2921
    } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2922
      // The lock is already held, and this is recursive.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2923
      assert(_drain_in_progress, "This should only be the recursive case.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2924
      handle_evacuation_failure_common(old, m);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2925
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2926
    return old;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2927
  } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2928
    // Someone else had a place to copy it.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2929
    return forward_ptr;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2930
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2931
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2932
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2933
void G1CollectedHeap::handle_evacuation_failure_common(oop old, markOop m) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2934
  set_evacuation_failed(true);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2935
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2936
  preserve_mark_if_necessary(old, m);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2937
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2938
  HeapRegion* r = heap_region_containing(old);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2939
  if (!r->evacuation_failed()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2940
    r->set_evacuation_failed(true);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2941
    if (G1TraceRegions) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2942
      gclog_or_tty->print("evacuation failed in heap region "PTR_FORMAT" "
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2943
                          "["PTR_FORMAT","PTR_FORMAT")\n",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2944
                          r, r->bottom(), r->end());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2945
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2946
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2947
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2948
  push_on_evac_failure_scan_stack(old);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2949
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2950
  if (!_drain_in_progress) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2951
    // prevent recursion in copy_to_survivor_space()
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2952
    _drain_in_progress = true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2953
    drain_evac_failure_scan_stack();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2954
    _drain_in_progress = false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2955
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2956
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2957
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2958
void G1CollectedHeap::preserve_mark_if_necessary(oop obj, markOop m) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2959
  if (m != markOopDesc::prototype()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2960
    if (_objs_with_preserved_marks == NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2961
      assert(_preserved_marks_of_objs == NULL, "Both or none.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2962
      _objs_with_preserved_marks =
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2963
        new (ResourceObj::C_HEAP) GrowableArray<oop>(40, true);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2964
      _preserved_marks_of_objs =
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2965
        new (ResourceObj::C_HEAP) GrowableArray<markOop>(40, true);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2966
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2967
    _objs_with_preserved_marks->push(obj);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2968
    _preserved_marks_of_objs->push(m);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2969
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2970
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2971
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2972
// *** Parallel G1 Evacuation
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2973
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2974
HeapWord* G1CollectedHeap::par_allocate_during_gc(GCAllocPurpose purpose,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2975
                                                  size_t word_size) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2976
  HeapRegion* alloc_region = _gc_alloc_regions[purpose];
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2977
  // let the caller handle alloc failure
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2978
  if (alloc_region == NULL) return NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2979
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2980
  HeapWord* block = alloc_region->par_allocate(word_size);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2981
  if (block == NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2982
    MutexLockerEx x(par_alloc_during_gc_lock(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2983
                    Mutex::_no_safepoint_check_flag);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2984
    block = allocate_during_gc_slow(purpose, alloc_region, true, word_size);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2985
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2986
  return block;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2987
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2988
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2989
HeapWord*
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2990
G1CollectedHeap::allocate_during_gc_slow(GCAllocPurpose purpose,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2991
                                         HeapRegion*    alloc_region,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2992
                                         bool           par,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2993
                                         size_t         word_size) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2994
  HeapWord* block = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2995
  // In the parallel case, a previous thread to obtain the lock may have
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2996
  // already assigned a new gc_alloc_region.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2997
  if (alloc_region != _gc_alloc_regions[purpose]) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2998
    assert(par, "But should only happen in parallel case.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  2999
    alloc_region = _gc_alloc_regions[purpose];
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3000
    if (alloc_region == NULL) return NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3001
    block = alloc_region->par_allocate(word_size);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3002
    if (block != NULL) return block;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3003
    // Otherwise, continue; this new region is empty, too.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3004
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3005
  assert(alloc_region != NULL, "We better have an allocation region");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3006
  // Another thread might have obtained alloc_region for the given
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3007
  // purpose, and might be attempting to allocate in it, and might
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3008
  // succeed.  Therefore, we can't do the "finalization" stuff on the
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3009
  // region below until we're sure the last allocation has happened.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3010
  // We ensure this by allocating the remaining space with a garbage
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3011
  // object.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3012
  if (par) par_allocate_remaining_space(alloc_region);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3013
  // Now we can do the post-GC stuff on the region.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3014
  alloc_region->note_end_of_copying();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3015
  g1_policy()->record_after_bytes(alloc_region->used());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3016
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3017
  if (_gc_alloc_region_counts[purpose] >= g1_policy()->max_regions(purpose)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3018
    // Cannot allocate more regions for the given purpose.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3019
    GCAllocPurpose alt_purpose = g1_policy()->alternative_purpose(purpose);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3020
    // Is there an alternative?
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3021
    if (purpose != alt_purpose) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3022
      HeapRegion* alt_region = _gc_alloc_regions[alt_purpose];
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3023
      // Has not the alternative region been aliased?
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3024
      if (alloc_region != alt_region) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3025
        // Try to allocate in the alternative region.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3026
        if (par) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3027
          block = alt_region->par_allocate(word_size);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3028
        } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3029
          block = alt_region->allocate(word_size);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3030
        }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3031
        // Make an alias.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3032
        _gc_alloc_regions[purpose] = _gc_alloc_regions[alt_purpose];
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3033
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3034
      if (block != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3035
        return block;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3036
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3037
      // Both the allocation region and the alternative one are full
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3038
      // and aliased, replace them with a new allocation region.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3039
      purpose = alt_purpose;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3040
    } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3041
      set_gc_alloc_region(purpose, NULL);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3042
      return NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3043
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3044
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3045
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3046
  // Now allocate a new region for allocation.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3047
  alloc_region = newAllocRegionWithExpansion(purpose, word_size, false /*zero_filled*/);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3048
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3049
  // let the caller handle alloc failure
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3050
  if (alloc_region != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3051
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3052
    assert(check_gc_alloc_regions(), "alloc regions messed up");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3053
    assert(alloc_region->saved_mark_at_top(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3054
           "Mark should have been saved already.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3055
    // We used to assert that the region was zero-filled here, but no
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3056
    // longer.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3057
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3058
    // This must be done last: once it's installed, other regions may
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3059
    // allocate in it (without holding the lock.)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3060
    set_gc_alloc_region(purpose, alloc_region);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3061
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3062
    if (par) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3063
      block = alloc_region->par_allocate(word_size);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3064
    } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3065
      block = alloc_region->allocate(word_size);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3066
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3067
    // Caller handles alloc failure.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3068
  } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3069
    // This sets other apis using the same old alloc region to NULL, also.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3070
    set_gc_alloc_region(purpose, NULL);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3071
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3072
  return block;  // May be NULL.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3073
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3074
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3075
void G1CollectedHeap::par_allocate_remaining_space(HeapRegion* r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3076
  HeapWord* block = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3077
  size_t free_words;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3078
  do {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3079
    free_words = r->free()/HeapWordSize;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3080
    // If there's too little space, no one can allocate, so we're done.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3081
    if (free_words < (size_t)oopDesc::header_size()) return;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3082
    // Otherwise, try to claim it.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3083
    block = r->par_allocate(free_words);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3084
  } while (block == NULL);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3085
  SharedHeap::fill_region_with_object(MemRegion(block, free_words));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3086
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3087
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3088
#define use_local_bitmaps         1
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3089
#define verify_local_bitmaps      0
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3090
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3091
#ifndef PRODUCT
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3092
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3093
class GCLabBitMap;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3094
class GCLabBitMapClosure: public BitMapClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3095
private:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3096
  ConcurrentMark* _cm;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3097
  GCLabBitMap*    _bitmap;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3098
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3099
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3100
  GCLabBitMapClosure(ConcurrentMark* cm,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3101
                     GCLabBitMap* bitmap) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3102
    _cm     = cm;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3103
    _bitmap = bitmap;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3104
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3105
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3106
  virtual bool do_bit(size_t offset);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3107
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3108
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3109
#endif // PRODUCT
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3110
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3111
#define oop_buffer_length 256
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3112
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3113
class GCLabBitMap: public BitMap {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3114
private:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3115
  ConcurrentMark* _cm;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3116
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3117
  int       _shifter;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3118
  size_t    _bitmap_word_covers_words;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3119
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3120
  // beginning of the heap
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3121
  HeapWord* _heap_start;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3122
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3123
  // this is the actual start of the GCLab
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3124
  HeapWord* _real_start_word;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3125
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3126
  // this is the actual end of the GCLab
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3127
  HeapWord* _real_end_word;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3128
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3129
  // this is the first word, possibly located before the actual start
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3130
  // of the GCLab, that corresponds to the first bit of the bitmap
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3131
  HeapWord* _start_word;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3132
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3133
  // size of a GCLab in words
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3134
  size_t _gclab_word_size;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3135
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3136
  static int shifter() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3137
    return MinObjAlignment - 1;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3138
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3139
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3140
  // how many heap words does a single bitmap word corresponds to?
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3141
  static size_t bitmap_word_covers_words() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3142
    return BitsPerWord << shifter();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3143
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3144
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3145
  static size_t gclab_word_size() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3146
    return ParallelGCG1AllocBufferSize / HeapWordSize;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3147
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3148
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3149
  static size_t bitmap_size_in_bits() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3150
    size_t bits_in_bitmap = gclab_word_size() >> shifter();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3151
    // We are going to ensure that the beginning of a word in this
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3152
    // bitmap also corresponds to the beginning of a word in the
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3153
    // global marking bitmap. To handle the case where a GCLab
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3154
    // starts from the middle of the bitmap, we need to add enough
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3155
    // space (i.e. up to a bitmap word) to ensure that we have
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3156
    // enough bits in the bitmap.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3157
    return bits_in_bitmap + BitsPerWord - 1;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3158
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3159
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3160
  GCLabBitMap(HeapWord* heap_start)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3161
    : BitMap(bitmap_size_in_bits()),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3162
      _cm(G1CollectedHeap::heap()->concurrent_mark()),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3163
      _shifter(shifter()),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3164
      _bitmap_word_covers_words(bitmap_word_covers_words()),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3165
      _heap_start(heap_start),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3166
      _gclab_word_size(gclab_word_size()),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3167
      _real_start_word(NULL),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3168
      _real_end_word(NULL),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3169
      _start_word(NULL)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3170
  {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3171
    guarantee( size_in_words() >= bitmap_size_in_words(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3172
               "just making sure");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3173
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3174
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3175
  inline unsigned heapWordToOffset(HeapWord* addr) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3176
    unsigned offset = (unsigned) pointer_delta(addr, _start_word) >> _shifter;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3177
    assert(offset < size(), "offset should be within bounds");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3178
    return offset;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3179
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3180
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3181
  inline HeapWord* offsetToHeapWord(size_t offset) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3182
    HeapWord* addr =  _start_word + (offset << _shifter);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3183
    assert(_real_start_word <= addr && addr < _real_end_word, "invariant");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3184
    return addr;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3185
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3186
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3187
  bool fields_well_formed() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3188
    bool ret1 = (_real_start_word == NULL) &&
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3189
                (_real_end_word == NULL) &&
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3190
                (_start_word == NULL);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3191
    if (ret1)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3192
      return true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3193
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3194
    bool ret2 = _real_start_word >= _start_word &&
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3195
      _start_word < _real_end_word &&
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3196
      (_real_start_word + _gclab_word_size) == _real_end_word &&
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3197
      (_start_word + _gclab_word_size + _bitmap_word_covers_words)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3198
                                                              > _real_end_word;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3199
    return ret2;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3200
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3201
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3202
  inline bool mark(HeapWord* addr) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3203
    guarantee(use_local_bitmaps, "invariant");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3204
    assert(fields_well_formed(), "invariant");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3205
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3206
    if (addr >= _real_start_word && addr < _real_end_word) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3207
      assert(!isMarked(addr), "should not have already been marked");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3208
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3209
      // first mark it on the bitmap
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3210
      at_put(heapWordToOffset(addr), true);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3211
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3212
      return true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3213
    } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3214
      return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3215
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3216
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3217
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3218
  inline bool isMarked(HeapWord* addr) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3219
    guarantee(use_local_bitmaps, "invariant");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3220
    assert(fields_well_formed(), "invariant");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3221
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3222
    return at(heapWordToOffset(addr));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3223
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3224
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3225
  void set_buffer(HeapWord* start) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3226
    guarantee(use_local_bitmaps, "invariant");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3227
    clear();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3228
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3229
    assert(start != NULL, "invariant");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3230
    _real_start_word = start;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3231
    _real_end_word   = start + _gclab_word_size;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3232
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3233
    size_t diff =
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3234
      pointer_delta(start, _heap_start) % _bitmap_word_covers_words;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3235
    _start_word = start - diff;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3236
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3237
    assert(fields_well_formed(), "invariant");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3238
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3239
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3240
#ifndef PRODUCT
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3241
  void verify() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3242
    // verify that the marks have been propagated
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3243
    GCLabBitMapClosure cl(_cm, this);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3244
    iterate(&cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3245
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3246
#endif // PRODUCT
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3247
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3248
  void retire() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3249
    guarantee(use_local_bitmaps, "invariant");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3250
    assert(fields_well_formed(), "invariant");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3251
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3252
    if (_start_word != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3253
      CMBitMap*       mark_bitmap = _cm->nextMarkBitMap();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3254
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3255
      // this means that the bitmap was set up for the GCLab
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3256
      assert(_real_start_word != NULL && _real_end_word != NULL, "invariant");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3257
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3258
      mark_bitmap->mostly_disjoint_range_union(this,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3259
                                0, // always start from the start of the bitmap
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3260
                                _start_word,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3261
                                size_in_words());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3262
      _cm->grayRegionIfNecessary(MemRegion(_real_start_word, _real_end_word));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3263
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3264
#ifndef PRODUCT
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3265
      if (use_local_bitmaps && verify_local_bitmaps)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3266
        verify();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3267
#endif // PRODUCT
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3268
    } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3269
      assert(_real_start_word == NULL && _real_end_word == NULL, "invariant");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3270
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3271
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3272
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3273
  static size_t bitmap_size_in_words() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3274
    return (bitmap_size_in_bits() + BitsPerWord - 1) / BitsPerWord;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3275
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3276
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3277
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3278
#ifndef PRODUCT
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3279
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3280
bool GCLabBitMapClosure::do_bit(size_t offset) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3281
  HeapWord* addr = _bitmap->offsetToHeapWord(offset);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3282
  guarantee(_cm->isMarked(oop(addr)), "it should be!");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3283
  return true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3284
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3285
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3286
#endif // PRODUCT
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3287
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3288
class G1ParGCAllocBuffer: public ParGCAllocBuffer {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3289
private:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3290
  bool        _retired;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3291
  bool        _during_marking;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3292
  GCLabBitMap _bitmap;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3293
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3294
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3295
  G1ParGCAllocBuffer() :
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3296
    ParGCAllocBuffer(ParallelGCG1AllocBufferSize / HeapWordSize),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3297
    _during_marking(G1CollectedHeap::heap()->mark_in_progress()),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3298
    _bitmap(G1CollectedHeap::heap()->reserved_region().start()),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3299
    _retired(false)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3300
  { }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3301
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3302
  inline bool mark(HeapWord* addr) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3303
    guarantee(use_local_bitmaps, "invariant");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3304
    assert(_during_marking, "invariant");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3305
    return _bitmap.mark(addr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3306
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3307
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3308
  inline void set_buf(HeapWord* buf) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3309
    if (use_local_bitmaps && _during_marking)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3310
      _bitmap.set_buffer(buf);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3311
    ParGCAllocBuffer::set_buf(buf);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3312
    _retired = false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3313
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3314
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3315
  inline void retire(bool end_of_gc, bool retain) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3316
    if (_retired)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3317
      return;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3318
    if (use_local_bitmaps && _during_marking) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3319
      _bitmap.retire();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3320
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3321
    ParGCAllocBuffer::retire(end_of_gc, retain);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3322
    _retired = true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3323
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3324
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3325
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3326
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3327
class G1ParScanThreadState : public StackObj {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3328
protected:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3329
  G1CollectedHeap* _g1h;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3330
  RefToScanQueue*  _refs;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3331
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3332
  typedef GrowableArray<oop*> OverflowQueue;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3333
  OverflowQueue* _overflowed_refs;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3334
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3335
  G1ParGCAllocBuffer _alloc_buffers[GCAllocPurposeCount];
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3336
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3337
  size_t           _alloc_buffer_waste;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3338
  size_t           _undo_waste;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3339
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3340
  OopsInHeapRegionClosure*      _evac_failure_cl;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3341
  G1ParScanHeapEvacClosure*     _evac_cl;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3342
  G1ParScanPartialArrayClosure* _partial_scan_cl;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3343
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3344
  int _hash_seed;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3345
  int _queue_num;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3346
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3347
  int _term_attempts;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3348
#if G1_DETAILED_STATS
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3349
  int _pushes, _pops, _steals, _steal_attempts;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3350
  int _overflow_pushes;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3351
#endif
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3352
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3353
  double _start;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3354
  double _start_strong_roots;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3355
  double _strong_roots_time;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3356
  double _start_term;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3357
  double _term_time;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3358
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3359
  // Map from young-age-index (0 == not young, 1 is youngest) to
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3360
  // surviving words. base is what we get back from the malloc call
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3361
  size_t* _surviving_young_words_base;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3362
  // this points into the array, as we use the first few entries for padding
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3363
  size_t* _surviving_young_words;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3364
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3365
#define PADDING_ELEM_NUM (64 / sizeof(size_t))
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3366
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3367
  void   add_to_alloc_buffer_waste(size_t waste) { _alloc_buffer_waste += waste; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3368
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3369
  void   add_to_undo_waste(size_t waste)         { _undo_waste += waste; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3370
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3371
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3372
  G1ParScanThreadState(G1CollectedHeap* g1h, int queue_num)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3373
    : _g1h(g1h),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3374
      _refs(g1h->task_queue(queue_num)),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3375
      _hash_seed(17), _queue_num(queue_num),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3376
      _term_attempts(0),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3377
#if G1_DETAILED_STATS
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3378
      _pushes(0), _pops(0), _steals(0),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3379
      _steal_attempts(0),  _overflow_pushes(0),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3380
#endif
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3381
      _strong_roots_time(0), _term_time(0),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3382
      _alloc_buffer_waste(0), _undo_waste(0)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3383
  {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3384
    // we allocate G1YoungSurvRateNumRegions plus one entries, since
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3385
    // we "sacrifice" entry 0 to keep track of surviving bytes for
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3386
    // non-young regions (where the age is -1)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3387
    // We also add a few elements at the beginning and at the end in
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3388
    // an attempt to eliminate cache contention
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3389
    size_t real_length = 1 + _g1h->g1_policy()->young_cset_length();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3390
    size_t array_length = PADDING_ELEM_NUM +
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3391
                          real_length +
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3392
                          PADDING_ELEM_NUM;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3393
    _surviving_young_words_base = NEW_C_HEAP_ARRAY(size_t, array_length);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3394
    if (_surviving_young_words_base == NULL)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3395
      vm_exit_out_of_memory(array_length * sizeof(size_t),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3396
                            "Not enough space for young surv histo.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3397
    _surviving_young_words = _surviving_young_words_base + PADDING_ELEM_NUM;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3398
    memset(_surviving_young_words, 0, real_length * sizeof(size_t));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3399
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3400
    _overflowed_refs = new OverflowQueue(10);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3401
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3402
    _start = os::elapsedTime();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3403
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3404
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3405
  ~G1ParScanThreadState() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3406
    FREE_C_HEAP_ARRAY(size_t, _surviving_young_words_base);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3407
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3408
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3409
  RefToScanQueue*   refs()            { return _refs;             }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3410
  OverflowQueue*    overflowed_refs() { return _overflowed_refs;  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3411
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3412
  inline G1ParGCAllocBuffer* alloc_buffer(GCAllocPurpose purpose) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3413
    return &_alloc_buffers[purpose];
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3414
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3415
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3416
  size_t alloc_buffer_waste()                    { return _alloc_buffer_waste; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3417
  size_t undo_waste()                            { return _undo_waste; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3418
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3419
  void push_on_queue(oop* ref) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3420
    if (!refs()->push(ref)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3421
      overflowed_refs()->push(ref);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3422
      IF_G1_DETAILED_STATS(note_overflow_push());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3423
    } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3424
      IF_G1_DETAILED_STATS(note_push());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3425
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3426
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3427
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3428
  void pop_from_queue(oop*& ref) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3429
    if (!refs()->pop_local(ref)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3430
      ref = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3431
    } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3432
      IF_G1_DETAILED_STATS(note_pop());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3433
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3434
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3435
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3436
  void pop_from_overflow_queue(oop*& ref) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3437
    ref = overflowed_refs()->pop();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3438
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3439
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3440
  int refs_to_scan()                             { return refs()->size();                 }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3441
  int overflowed_refs_to_scan()                  { return overflowed_refs()->length();    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3442
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3443
  HeapWord* allocate_slow(GCAllocPurpose purpose, size_t word_sz) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3444
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3445
    HeapWord* obj = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3446
    if (word_sz * 100 <
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3447
        (size_t)(ParallelGCG1AllocBufferSize / HeapWordSize) *
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3448
                                                  ParallelGCBufferWastePct) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3449
      G1ParGCAllocBuffer* alloc_buf = alloc_buffer(purpose);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3450
      add_to_alloc_buffer_waste(alloc_buf->words_remaining());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3451
      alloc_buf->retire(false, false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3452
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3453
      HeapWord* buf =
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3454
        _g1h->par_allocate_during_gc(purpose, ParallelGCG1AllocBufferSize / HeapWordSize);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3455
      if (buf == NULL) return NULL; // Let caller handle allocation failure.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3456
      // Otherwise.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3457
      alloc_buf->set_buf(buf);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3458
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3459
      obj = alloc_buf->allocate(word_sz);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3460
      assert(obj != NULL, "buffer was definitely big enough...");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3461
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3462
    else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3463
      obj = _g1h->par_allocate_during_gc(purpose, word_sz);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3464
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3465
    return obj;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3466
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3467
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3468
  HeapWord* allocate(GCAllocPurpose purpose, size_t word_sz) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3469
    HeapWord* obj = alloc_buffer(purpose)->allocate(word_sz);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3470
    if (obj != NULL) return obj;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3471
    return allocate_slow(purpose, word_sz);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3472
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3473
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3474
  void undo_allocation(GCAllocPurpose purpose, HeapWord* obj, size_t word_sz) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3475
    if (alloc_buffer(purpose)->contains(obj)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3476
      guarantee(alloc_buffer(purpose)->contains(obj + word_sz - 1),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3477
                "should contain whole object");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3478
      alloc_buffer(purpose)->undo_allocation(obj, word_sz);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3479
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3480
    else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3481
      SharedHeap::fill_region_with_object(MemRegion(obj, word_sz));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3482
      add_to_undo_waste(word_sz);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3483
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3484
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3485
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3486
  void set_evac_failure_closure(OopsInHeapRegionClosure* evac_failure_cl) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3487
    _evac_failure_cl = evac_failure_cl;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3488
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3489
  OopsInHeapRegionClosure* evac_failure_closure() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3490
    return _evac_failure_cl;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3491
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3492
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3493
  void set_evac_closure(G1ParScanHeapEvacClosure* evac_cl) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3494
    _evac_cl = evac_cl;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3495
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3496
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3497
  void set_partial_scan_closure(G1ParScanPartialArrayClosure* partial_scan_cl) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3498
    _partial_scan_cl = partial_scan_cl;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3499
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3500
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3501
  int* hash_seed() { return &_hash_seed; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3502
  int  queue_num() { return _queue_num; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3503
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3504
  int term_attempts()   { return _term_attempts; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3505
  void note_term_attempt()  { _term_attempts++; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3506
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3507
#if G1_DETAILED_STATS
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3508
  int pushes()          { return _pushes; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3509
  int pops()            { return _pops; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3510
  int steals()          { return _steals; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3511
  int steal_attempts()  { return _steal_attempts; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3512
  int overflow_pushes() { return _overflow_pushes; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3513
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3514
  void note_push()          { _pushes++; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3515
  void note_pop()           { _pops++; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3516
  void note_steal()         { _steals++; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3517
  void note_steal_attempt() { _steal_attempts++; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3518
  void note_overflow_push() { _overflow_pushes++; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3519
#endif
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3520
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3521
  void start_strong_roots() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3522
    _start_strong_roots = os::elapsedTime();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3523
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3524
  void end_strong_roots() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3525
    _strong_roots_time += (os::elapsedTime() - _start_strong_roots);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3526
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3527
  double strong_roots_time() { return _strong_roots_time; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3528
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3529
  void start_term_time() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3530
    note_term_attempt();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3531
    _start_term = os::elapsedTime();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3532
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3533
  void end_term_time() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3534
    _term_time += (os::elapsedTime() - _start_term);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3535
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3536
  double term_time() { return _term_time; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3537
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3538
  double elapsed() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3539
    return os::elapsedTime() - _start;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3540
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3541
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3542
  size_t* surviving_young_words() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3543
    // We add on to hide entry 0 which accumulates surviving words for
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3544
    // age -1 regions (i.e. non-young ones)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3545
    return _surviving_young_words;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3546
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3547
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3548
  void retire_alloc_buffers() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3549
    for (int ap = 0; ap < GCAllocPurposeCount; ++ap) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3550
      size_t waste = _alloc_buffers[ap].words_remaining();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3551
      add_to_alloc_buffer_waste(waste);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3552
      _alloc_buffers[ap].retire(true, false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3553
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3554
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3555
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3556
  void trim_queue() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3557
    while (refs_to_scan() > 0 || overflowed_refs_to_scan() > 0) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3558
      oop *ref_to_scan = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3559
      if (overflowed_refs_to_scan() == 0) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3560
        pop_from_queue(ref_to_scan);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3561
      } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3562
        pop_from_overflow_queue(ref_to_scan);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3563
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3564
      if (ref_to_scan != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3565
        if ((intptr_t)ref_to_scan & G1_PARTIAL_ARRAY_MASK) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3566
          _partial_scan_cl->do_oop_nv(ref_to_scan);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3567
        } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3568
          // Note: we can use "raw" versions of "region_containing" because
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3569
          // "obj_to_scan" is definitely in the heap, and is not in a
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3570
          // humongous region.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3571
          HeapRegion* r = _g1h->heap_region_containing_raw(ref_to_scan);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3572
          _evac_cl->set_region(r);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3573
          _evac_cl->do_oop_nv(ref_to_scan);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3574
        }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3575
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3576
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3577
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3578
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3579
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3580
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3581
G1ParClosureSuper::G1ParClosureSuper(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state) :
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3582
  _g1(g1), _g1_rem(_g1->g1_rem_set()), _cm(_g1->concurrent_mark()),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3583
  _par_scan_state(par_scan_state) { }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3584
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3585
// This closure is applied to the fields of the objects that have just been copied.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3586
// Should probably be made inline and moved in g1OopClosures.inline.hpp.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3587
void G1ParScanClosure::do_oop_nv(oop* p) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3588
  oop obj = *p;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3589
  if (obj != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3590
    if (_g1->obj_in_cs(obj)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3591
      if (obj->is_forwarded()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3592
        *p = obj->forwardee();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3593
      } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3594
        _par_scan_state->push_on_queue(p);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3595
        return;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3596
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3597
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3598
    _g1_rem->par_write_ref(_from, p, _par_scan_state->queue_num());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3599
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3600
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3601
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3602
void G1ParCopyHelper::mark_forwardee(oop* p) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3603
  // This is called _after_ do_oop_work has been called, hence after
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3604
  // the object has been relocated to its new location and *p points
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3605
  // to its new location.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3606
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3607
  oop thisOop = *p;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3608
  if (thisOop != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3609
    assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(thisOop)),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3610
           "shouldn't still be in the CSet if evacuation didn't fail.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3611
    HeapWord* addr = (HeapWord*)thisOop;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3612
    if (_g1->is_in_g1_reserved(addr))
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3613
      _cm->grayRoot(oop(addr));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3614
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3615
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3616
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3617
oop G1ParCopyHelper::copy_to_survivor_space(oop old) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3618
  size_t    word_sz = old->size();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3619
  HeapRegion* from_region = _g1->heap_region_containing_raw(old);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3620
  // +1 to make the -1 indexes valid...
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3621
  int       young_index = from_region->young_index_in_cset()+1;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3622
  assert( (from_region->is_young() && young_index > 0) ||
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3623
          (!from_region->is_young() && young_index == 0), "invariant" );
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3624
  G1CollectorPolicy* g1p = _g1->g1_policy();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3625
  markOop m = old->mark();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3626
  GCAllocPurpose alloc_purpose = g1p->evacuation_destination(from_region, m->age(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3627
                                                             word_sz);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3628
  HeapWord* obj_ptr = _par_scan_state->allocate(alloc_purpose, word_sz);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3629
  oop       obj     = oop(obj_ptr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3630
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3631
  if (obj_ptr == NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3632
    // This will either forward-to-self, or detect that someone else has
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3633
    // installed a forwarding pointer.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3634
    OopsInHeapRegionClosure* cl = _par_scan_state->evac_failure_closure();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3635
    return _g1->handle_evacuation_failure_par(cl, old);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3636
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3637
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3638
  oop forward_ptr = old->forward_to_atomic(obj);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3639
  if (forward_ptr == NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3640
    Copy::aligned_disjoint_words((HeapWord*) old, obj_ptr, word_sz);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3641
    obj->set_mark(m);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3642
    if (g1p->track_object_age(alloc_purpose)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3643
      obj->incr_age();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3644
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3645
    // preserve "next" mark bit
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3646
    if (_g1->mark_in_progress() && !_g1->is_obj_ill(old)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3647
      if (!use_local_bitmaps ||
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3648
          !_par_scan_state->alloc_buffer(alloc_purpose)->mark(obj_ptr)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3649
        // if we couldn't mark it on the local bitmap (this happens when
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3650
        // the object was not allocated in the GCLab), we have to bite
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3651
        // the bullet and do the standard parallel mark
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3652
        _cm->markAndGrayObjectIfNecessary(obj);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3653
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3654
#if 1
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3655
      if (_g1->isMarkedNext(old)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3656
        _cm->nextMarkBitMap()->parClear((HeapWord*)old);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3657
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3658
#endif
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3659
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3660
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3661
    size_t* surv_young_words = _par_scan_state->surviving_young_words();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3662
    surv_young_words[young_index] += word_sz;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3663
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3664
    if (obj->is_objArray() && arrayOop(obj)->length() >= ParGCArrayScanChunk) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3665
      arrayOop(old)->set_length(0);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3666
      _par_scan_state->push_on_queue((oop*) ((intptr_t)old | G1_PARTIAL_ARRAY_MASK));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3667
    } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3668
      _scanner->set_region(_g1->heap_region_containing(obj));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3669
      obj->oop_iterate_backwards(_scanner);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3670
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3671
  } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3672
    _par_scan_state->undo_allocation(alloc_purpose, obj_ptr, word_sz);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3673
    obj = forward_ptr;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3674
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3675
  return obj;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3676
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3677
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3678
template<bool do_gen_barrier, G1Barrier barrier, bool do_mark_forwardee>
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3679
void G1ParCopyClosure<do_gen_barrier, barrier, do_mark_forwardee>::do_oop_work(oop* p) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3680
  oop obj = *p;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3681
  assert(barrier != G1BarrierRS || obj != NULL,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3682
         "Precondition: G1BarrierRS implies obj is nonNull");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3683
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3684
  if (obj != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3685
    if (_g1->obj_in_cs(obj)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3686
#if G1_REM_SET_LOGGING
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3687
      gclog_or_tty->print_cr("Loc "PTR_FORMAT" contains pointer "PTR_FORMAT" into CS.",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3688
                             p, (void*) obj);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3689
#endif
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3690
      if (obj->is_forwarded()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3691
        *p = obj->forwardee();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3692
      } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3693
        *p = copy_to_survivor_space(obj);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3694
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3695
      // When scanning the RS, we only care about objs in CS.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3696
      if (barrier == G1BarrierRS) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3697
        _g1_rem->par_write_ref(_from, p, _par_scan_state->queue_num());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3698
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3699
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3700
    // When scanning moved objs, must look at all oops.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3701
    if (barrier == G1BarrierEvac) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3702
      _g1_rem->par_write_ref(_from, p, _par_scan_state->queue_num());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3703
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3704
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3705
    if (do_gen_barrier) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3706
      par_do_barrier(p);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3707
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3708
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3709
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3710
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3711
template void G1ParCopyClosure<false, G1BarrierEvac, false>::do_oop_work(oop* p);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3712
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3713
template <class T> void G1ParScanPartialArrayClosure::process_array_chunk(
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3714
  oop obj, int start, int end) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3715
  // process our set of indices (include header in first chunk)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3716
  assert(start < end, "invariant");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3717
  T* const base      = (T*)objArrayOop(obj)->base();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3718
  T* const start_addr = base + start;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3719
  T* const end_addr   = base + end;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3720
  MemRegion mr((HeapWord*)start_addr, (HeapWord*)end_addr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3721
  _scanner.set_region(_g1->heap_region_containing(obj));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3722
  obj->oop_iterate(&_scanner, mr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3723
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3724
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3725
void G1ParScanPartialArrayClosure::do_oop_nv(oop* p) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3726
  assert(!UseCompressedOops, "Needs to be fixed to work with compressed oops");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3727
  oop old = oop((intptr_t)p & ~G1_PARTIAL_ARRAY_MASK);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3728
  assert(old->is_objArray(), "must be obj array");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3729
  assert(old->is_forwarded(), "must be forwarded");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3730
  assert(Universe::heap()->is_in_reserved(old), "must be in heap.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3731
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3732
  objArrayOop obj = objArrayOop(old->forwardee());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3733
  assert((void*)old != (void*)old->forwardee(), "self forwarding here?");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3734
  // Process ParGCArrayScanChunk elements now
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3735
  // and push the remainder back onto queue
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3736
  int start     = arrayOop(old)->length();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3737
  int end       = obj->length();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3738
  int remainder = end - start;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3739
  assert(start <= end, "just checking");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3740
  if (remainder > 2 * ParGCArrayScanChunk) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3741
    // Test above combines last partial chunk with a full chunk
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3742
    end = start + ParGCArrayScanChunk;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3743
    arrayOop(old)->set_length(end);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3744
    // Push remainder.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3745
    _par_scan_state->push_on_queue((oop*) ((intptr_t) old | G1_PARTIAL_ARRAY_MASK));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3746
  } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3747
    // Restore length so that the heap remains parsable in
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3748
    // case of evacuation failure.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3749
    arrayOop(old)->set_length(end);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3750
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3751
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3752
  // process our set of indices (include header in first chunk)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3753
  process_array_chunk<oop>(obj, start, end);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3754
  oop* start_addr = start == 0 ? (oop*)obj : obj->obj_at_addr<oop>(start);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3755
  oop* end_addr   = (oop*)(obj->base()) + end; // obj_at_addr(end) asserts end < length
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3756
  MemRegion mr((HeapWord*)start_addr, (HeapWord*)end_addr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3757
  _scanner.set_region(_g1->heap_region_containing(obj));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3758
  obj->oop_iterate(&_scanner, mr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3759
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3760
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3761
int G1ScanAndBalanceClosure::_nq = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3762
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3763
class G1ParEvacuateFollowersClosure : public VoidClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3764
protected:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3765
  G1CollectedHeap*              _g1h;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3766
  G1ParScanThreadState*         _par_scan_state;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3767
  RefToScanQueueSet*            _queues;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3768
  ParallelTaskTerminator*       _terminator;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3769
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3770
  G1ParScanThreadState*   par_scan_state() { return _par_scan_state; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3771
  RefToScanQueueSet*      queues()         { return _queues; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3772
  ParallelTaskTerminator* terminator()     { return _terminator; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3773
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3774
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3775
  G1ParEvacuateFollowersClosure(G1CollectedHeap* g1h,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3776
                                G1ParScanThreadState* par_scan_state,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3777
                                RefToScanQueueSet* queues,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3778
                                ParallelTaskTerminator* terminator)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3779
    : _g1h(g1h), _par_scan_state(par_scan_state),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3780
      _queues(queues), _terminator(terminator) {}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3781
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3782
  void do_void() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3783
    G1ParScanThreadState* pss = par_scan_state();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3784
    while (true) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3785
      oop* ref_to_scan;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3786
      pss->trim_queue();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3787
      IF_G1_DETAILED_STATS(pss->note_steal_attempt());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3788
      if (queues()->steal(pss->queue_num(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3789
                          pss->hash_seed(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3790
                          ref_to_scan)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3791
        IF_G1_DETAILED_STATS(pss->note_steal());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3792
        pss->push_on_queue(ref_to_scan);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3793
        continue;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3794
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3795
      pss->start_term_time();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3796
      if (terminator()->offer_termination()) break;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3797
      pss->end_term_time();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3798
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3799
    pss->end_term_time();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3800
    pss->retire_alloc_buffers();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3801
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3802
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3803
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3804
class G1ParTask : public AbstractGangTask {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3805
protected:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3806
  G1CollectedHeap*       _g1h;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3807
  RefToScanQueueSet      *_queues;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3808
  ParallelTaskTerminator _terminator;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3809
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3810
  Mutex _stats_lock;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3811
  Mutex* stats_lock() { return &_stats_lock; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3812
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3813
  size_t getNCards() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3814
    return (_g1h->capacity() + G1BlockOffsetSharedArray::N_bytes - 1)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3815
      / G1BlockOffsetSharedArray::N_bytes;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3816
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3817
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3818
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3819
  G1ParTask(G1CollectedHeap* g1h, int workers, RefToScanQueueSet *task_queues)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3820
    : AbstractGangTask("G1 collection"),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3821
      _g1h(g1h),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3822
      _queues(task_queues),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3823
      _terminator(workers, _queues),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3824
      _stats_lock(Mutex::leaf, "parallel G1 stats lock", true)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3825
  {}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3826
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3827
  RefToScanQueueSet* queues() { return _queues; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3828
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3829
  RefToScanQueue *work_queue(int i) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3830
    return queues()->queue(i);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3831
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3832
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3833
  void work(int i) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3834
    ResourceMark rm;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3835
    HandleMark   hm;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3836
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3837
    G1ParScanThreadState pss(_g1h, i);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3838
    G1ParScanHeapEvacClosure     scan_evac_cl(_g1h, &pss);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3839
    G1ParScanHeapEvacClosure     evac_failure_cl(_g1h, &pss);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3840
    G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3841
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3842
    pss.set_evac_closure(&scan_evac_cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3843
    pss.set_evac_failure_closure(&evac_failure_cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3844
    pss.set_partial_scan_closure(&partial_scan_cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3845
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3846
    G1ParScanExtRootClosure         only_scan_root_cl(_g1h, &pss);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3847
    G1ParScanPermClosure            only_scan_perm_cl(_g1h, &pss);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3848
    G1ParScanHeapRSClosure          only_scan_heap_rs_cl(_g1h, &pss);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3849
    G1ParScanAndMarkExtRootClosure  scan_mark_root_cl(_g1h, &pss);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3850
    G1ParScanAndMarkPermClosure     scan_mark_perm_cl(_g1h, &pss);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3851
    G1ParScanAndMarkHeapRSClosure   scan_mark_heap_rs_cl(_g1h, &pss);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3852
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3853
    OopsInHeapRegionClosure        *scan_root_cl;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3854
    OopsInHeapRegionClosure        *scan_perm_cl;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3855
    OopsInHeapRegionClosure        *scan_so_cl;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3856
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3857
    if (_g1h->g1_policy()->should_initiate_conc_mark()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3858
      scan_root_cl = &scan_mark_root_cl;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3859
      scan_perm_cl = &scan_mark_perm_cl;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3860
      scan_so_cl   = &scan_mark_heap_rs_cl;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3861
    } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3862
      scan_root_cl = &only_scan_root_cl;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3863
      scan_perm_cl = &only_scan_perm_cl;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3864
      scan_so_cl   = &only_scan_heap_rs_cl;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3865
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3866
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3867
    pss.start_strong_roots();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3868
    _g1h->g1_process_strong_roots(/* not collecting perm */ false,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3869
                                  SharedHeap::SO_AllClasses,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3870
                                  scan_root_cl,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3871
                                  &only_scan_heap_rs_cl,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3872
                                  scan_so_cl,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3873
                                  scan_perm_cl,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3874
                                  i);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3875
    pss.end_strong_roots();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3876
    {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3877
      double start = os::elapsedTime();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3878
      G1ParEvacuateFollowersClosure evac(_g1h, &pss, _queues, &_terminator);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3879
      evac.do_void();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3880
      double elapsed_ms = (os::elapsedTime()-start)*1000.0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3881
      double term_ms = pss.term_time()*1000.0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3882
      _g1h->g1_policy()->record_obj_copy_time(i, elapsed_ms-term_ms);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3883
      _g1h->g1_policy()->record_termination_time(i, term_ms);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3884
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3885
    _g1h->update_surviving_young_words(pss.surviving_young_words()+1);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3886
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3887
    // Clean up any par-expanded rem sets.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3888
    HeapRegionRemSet::par_cleanup();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3889
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3890
    MutexLocker x(stats_lock());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3891
    if (ParallelGCVerbose) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3892
      gclog_or_tty->print("Thread %d complete:\n", i);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3893
#if G1_DETAILED_STATS
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3894
      gclog_or_tty->print("  Pushes: %7d    Pops: %7d   Overflows: %7d   Steals %7d (in %d attempts)\n",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3895
                          pss.pushes(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3896
                          pss.pops(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3897
                          pss.overflow_pushes(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3898
                          pss.steals(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3899
                          pss.steal_attempts());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3900
#endif
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3901
      double elapsed      = pss.elapsed();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3902
      double strong_roots = pss.strong_roots_time();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3903
      double term         = pss.term_time();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3904
      gclog_or_tty->print("  Elapsed: %7.2f ms.\n"
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3905
                          "    Strong roots: %7.2f ms (%6.2f%%)\n"
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3906
                          "    Termination:  %7.2f ms (%6.2f%%) (in %d entries)\n",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3907
                          elapsed * 1000.0,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3908
                          strong_roots * 1000.0, (strong_roots*100.0/elapsed),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3909
                          term * 1000.0, (term*100.0/elapsed),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3910
                          pss.term_attempts());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3911
      size_t total_waste = pss.alloc_buffer_waste() + pss.undo_waste();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3912
      gclog_or_tty->print("  Waste: %8dK\n"
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3913
                 "    Alloc Buffer: %8dK\n"
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3914
                 "    Undo: %8dK\n",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3915
                 (total_waste * HeapWordSize) / K,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3916
                 (pss.alloc_buffer_waste() * HeapWordSize) / K,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3917
                 (pss.undo_waste() * HeapWordSize) / K);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3918
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3919
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3920
    assert(pss.refs_to_scan() == 0, "Task queue should be empty");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3921
    assert(pss.overflowed_refs_to_scan() == 0, "Overflow queue should be empty");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3922
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3923
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3924
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3925
// *** Common G1 Evacuation Stuff
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3926
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3927
class G1CountClosure: public OopsInHeapRegionClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3928
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3929
  int n;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3930
  G1CountClosure() : n(0) {}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3931
  void do_oop(narrowOop* p) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3932
    guarantee(false, "NYI");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3933
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3934
  void do_oop(oop* p) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3935
    oop obj = *p;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3936
    assert(obj != NULL && G1CollectedHeap::heap()->obj_in_cs(obj),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3937
           "Rem set closure called on non-rem-set pointer.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3938
    n++;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3939
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3940
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3941
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3942
static G1CountClosure count_closure;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3943
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3944
void
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3945
G1CollectedHeap::
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3946
g1_process_strong_roots(bool collecting_perm_gen,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3947
                        SharedHeap::ScanningOption so,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3948
                        OopClosure* scan_non_heap_roots,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3949
                        OopsInHeapRegionClosure* scan_rs,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3950
                        OopsInHeapRegionClosure* scan_so,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3951
                        OopsInGenClosure* scan_perm,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3952
                        int worker_i) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3953
  // First scan the strong roots, including the perm gen.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3954
  double ext_roots_start = os::elapsedTime();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3955
  double closure_app_time_sec = 0.0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3956
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3957
  BufferingOopClosure buf_scan_non_heap_roots(scan_non_heap_roots);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3958
  BufferingOopsInGenClosure buf_scan_perm(scan_perm);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3959
  buf_scan_perm.set_generation(perm_gen());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3960
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3961
  process_strong_roots(collecting_perm_gen, so,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3962
                       &buf_scan_non_heap_roots,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3963
                       &buf_scan_perm);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3964
  // Finish up any enqueued closure apps.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3965
  buf_scan_non_heap_roots.done();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3966
  buf_scan_perm.done();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3967
  double ext_roots_end = os::elapsedTime();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3968
  g1_policy()->reset_obj_copy_time(worker_i);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3969
  double obj_copy_time_sec =
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3970
    buf_scan_non_heap_roots.closure_app_seconds() +
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3971
    buf_scan_perm.closure_app_seconds();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3972
  g1_policy()->record_obj_copy_time(worker_i, obj_copy_time_sec * 1000.0);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3973
  double ext_root_time_ms =
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3974
    ((ext_roots_end - ext_roots_start) - obj_copy_time_sec) * 1000.0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3975
  g1_policy()->record_ext_root_scan_time(worker_i, ext_root_time_ms);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3976
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3977
  // Scan strong roots in mark stack.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3978
  if (!_process_strong_tasks->is_task_claimed(G1H_PS_mark_stack_oops_do)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3979
    concurrent_mark()->oops_do(scan_non_heap_roots);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3980
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3981
  double mark_stack_scan_ms = (os::elapsedTime() - ext_roots_end) * 1000.0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3982
  g1_policy()->record_mark_stack_scan_time(worker_i, mark_stack_scan_ms);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3983
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3984
  // XXX What should this be doing in the parallel case?
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3985
  g1_policy()->record_collection_pause_end_CH_strong_roots();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3986
  if (G1VerifyRemSet) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3987
    // :::: FIXME ::::
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3988
    // The stupid remembered set doesn't know how to filter out dead
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3989
    // objects, which the smart one does, and so when it is created
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3990
    // and then compared the number of entries in each differs and
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3991
    // the verification code fails.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3992
    guarantee(false, "verification code is broken, see note");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3993
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3994
    // Let's make sure that the current rem set agrees with the stupidest
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3995
    // one possible!
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3996
    bool refs_enabled = ref_processor()->discovery_enabled();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3997
    if (refs_enabled) ref_processor()->disable_discovery();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3998
    StupidG1RemSet stupid(this);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  3999
    count_closure.n = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4000
    stupid.oops_into_collection_set_do(&count_closure, worker_i);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4001
    int stupid_n = count_closure.n;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4002
    count_closure.n = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4003
    g1_rem_set()->oops_into_collection_set_do(&count_closure, worker_i);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4004
    guarantee(count_closure.n == stupid_n, "Old and new rem sets differ.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4005
    gclog_or_tty->print_cr("\nFound %d pointers in heap RS.", count_closure.n);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4006
    if (refs_enabled) ref_processor()->enable_discovery();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4007
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4008
  if (scan_so != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4009
    scan_scan_only_set(scan_so, worker_i);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4010
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4011
  // Now scan the complement of the collection set.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4012
  if (scan_rs != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4013
    g1_rem_set()->oops_into_collection_set_do(scan_rs, worker_i);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4014
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4015
  // Finish with the ref_processor roots.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4016
  if (!_process_strong_tasks->is_task_claimed(G1H_PS_refProcessor_oops_do)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4017
    ref_processor()->oops_do(scan_non_heap_roots);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4018
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4019
  g1_policy()->record_collection_pause_end_G1_strong_roots();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4020
  _process_strong_tasks->all_tasks_completed();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4021
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4022
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4023
void
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4024
G1CollectedHeap::scan_scan_only_region(HeapRegion* r,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4025
                                       OopsInHeapRegionClosure* oc,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4026
                                       int worker_i) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4027
  HeapWord* startAddr = r->bottom();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4028
  HeapWord* endAddr = r->used_region().end();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4029
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4030
  oc->set_region(r);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4031
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4032
  HeapWord* p = r->bottom();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4033
  HeapWord* t = r->top();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4034
  guarantee( p == r->next_top_at_mark_start(), "invariant" );
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4035
  while (p < t) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4036
    oop obj = oop(p);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4037
    p += obj->oop_iterate(oc);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4038
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4039
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4040
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4041
void
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4042
G1CollectedHeap::scan_scan_only_set(OopsInHeapRegionClosure* oc,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4043
                                    int worker_i) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4044
  double start = os::elapsedTime();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4045
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4046
  BufferingOopsInHeapRegionClosure boc(oc);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4047
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4048
  FilterInHeapRegionAndIntoCSClosure scan_only(this, &boc);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4049
  FilterAndMarkInHeapRegionAndIntoCSClosure scan_and_mark(this, &boc, concurrent_mark());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4050
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4051
  OopsInHeapRegionClosure *foc;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4052
  if (g1_policy()->should_initiate_conc_mark())
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4053
    foc = &scan_and_mark;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4054
  else
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4055
    foc = &scan_only;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4056
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4057
  HeapRegion* hr;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4058
  int n = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4059
  while ((hr = _young_list->par_get_next_scan_only_region()) != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4060
    scan_scan_only_region(hr, foc, worker_i);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4061
    ++n;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4062
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4063
  boc.done();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4064
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4065
  double closure_app_s = boc.closure_app_seconds();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4066
  g1_policy()->record_obj_copy_time(worker_i, closure_app_s * 1000.0);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4067
  double ms = (os::elapsedTime() - start - closure_app_s)*1000.0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4068
  g1_policy()->record_scan_only_time(worker_i, ms, n);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4069
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4070
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4071
void
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4072
G1CollectedHeap::g1_process_weak_roots(OopClosure* root_closure,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4073
                                       OopClosure* non_root_closure) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4074
  SharedHeap::process_weak_roots(root_closure, non_root_closure);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4075
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4076
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4077
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4078
class SaveMarksClosure: public HeapRegionClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4079
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4080
  bool doHeapRegion(HeapRegion* r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4081
    r->save_marks();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4082
    return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4083
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4084
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4085
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4086
void G1CollectedHeap::save_marks() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4087
  if (ParallelGCThreads == 0) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4088
    SaveMarksClosure sm;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4089
    heap_region_iterate(&sm);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4090
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4091
  // We do this even in the parallel case
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4092
  perm_gen()->save_marks();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4093
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4094
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4095
void G1CollectedHeap::evacuate_collection_set() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4096
  set_evacuation_failed(false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4097
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4098
  g1_rem_set()->prepare_for_oops_into_collection_set_do();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4099
  concurrent_g1_refine()->set_use_cache(false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4100
  int n_workers = (ParallelGCThreads > 0 ? workers()->total_workers() : 1);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4101
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4102
  set_par_threads(n_workers);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4103
  G1ParTask g1_par_task(this, n_workers, _task_queues);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4104
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4105
  init_for_evac_failure(NULL);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4106
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4107
  change_strong_roots_parity();  // In preparation for parallel strong roots.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4108
  rem_set()->prepare_for_younger_refs_iterate(true);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4109
  double start_par = os::elapsedTime();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4110
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4111
  if (ParallelGCThreads > 0) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4112
    // The individual threads will set their evac-failure closures.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4113
    workers()->run_task(&g1_par_task);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4114
  } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4115
    g1_par_task.work(0);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4116
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4117
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4118
  double par_time = (os::elapsedTime() - start_par) * 1000.0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4119
  g1_policy()->record_par_time(par_time);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4120
  set_par_threads(0);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4121
  // Is this the right thing to do here?  We don't save marks
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4122
  // on individual heap regions when we allocate from
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4123
  // them in parallel, so this seems like the correct place for this.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4124
  all_alloc_regions_note_end_of_copying();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4125
  {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4126
    G1IsAliveClosure is_alive(this);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4127
    G1KeepAliveClosure keep_alive(this);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4128
    JNIHandles::weak_oops_do(&is_alive, &keep_alive);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4129
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4130
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4131
  g1_rem_set()->cleanup_after_oops_into_collection_set_do();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4132
  concurrent_g1_refine()->set_use_cache(true);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4133
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4134
  finalize_for_evac_failure();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4135
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4136
  // Must do this before removing self-forwarding pointers, which clears
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4137
  // the per-region evac-failure flags.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4138
  concurrent_mark()->complete_marking_in_collection_set();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4139
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4140
  if (evacuation_failed()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4141
    remove_self_forwarding_pointers();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4142
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4143
    if (PrintGCDetails) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4144
      gclog_or_tty->print(" (evacuation failed)");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4145
    } else if (PrintGC) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4146
      gclog_or_tty->print("--");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4147
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4148
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4149
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4150
  COMPILER2_PRESENT(DerivedPointerTable::update_pointers());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4151
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4152
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4153
void G1CollectedHeap::free_region(HeapRegion* hr) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4154
  size_t pre_used = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4155
  size_t cleared_h_regions = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4156
  size_t freed_regions = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4157
  UncleanRegionList local_list;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4158
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4159
  HeapWord* start = hr->bottom();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4160
  HeapWord* end   = hr->prev_top_at_mark_start();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4161
  size_t used_bytes = hr->used();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4162
  size_t live_bytes = hr->max_live_bytes();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4163
  if (used_bytes > 0) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4164
    guarantee( live_bytes <= used_bytes, "invariant" );
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4165
  } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4166
    guarantee( live_bytes == 0, "invariant" );
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4167
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4168
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4169
  size_t garbage_bytes = used_bytes - live_bytes;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4170
  if (garbage_bytes > 0)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4171
    g1_policy()->decrease_known_garbage_bytes(garbage_bytes);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4172
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4173
  free_region_work(hr, pre_used, cleared_h_regions, freed_regions,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4174
                   &local_list);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4175
  finish_free_region_work(pre_used, cleared_h_regions, freed_regions,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4176
                          &local_list);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4177
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4178
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4179
void
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4180
G1CollectedHeap::free_region_work(HeapRegion* hr,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4181
                                  size_t& pre_used,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4182
                                  size_t& cleared_h_regions,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4183
                                  size_t& freed_regions,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4184
                                  UncleanRegionList* list,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4185
                                  bool par) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4186
  assert(!hr->popular(), "should not free popular regions");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4187
  pre_used += hr->used();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4188
  if (hr->isHumongous()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4189
    assert(hr->startsHumongous(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4190
           "Only the start of a humongous region should be freed.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4191
    int ind = _hrs->find(hr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4192
    assert(ind != -1, "Should have an index.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4193
    // Clear the start region.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4194
    hr->hr_clear(par, true /*clear_space*/);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4195
    list->insert_before_head(hr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4196
    cleared_h_regions++;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4197
    freed_regions++;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4198
    // Clear any continued regions.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4199
    ind++;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4200
    while ((size_t)ind < n_regions()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4201
      HeapRegion* hrc = _hrs->at(ind);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4202
      if (!hrc->continuesHumongous()) break;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4203
      // Otherwise, does continue the H region.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4204
      assert(hrc->humongous_start_region() == hr, "Huh?");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4205
      hrc->hr_clear(par, true /*clear_space*/);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4206
      cleared_h_regions++;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4207
      freed_regions++;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4208
      list->insert_before_head(hrc);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4209
      ind++;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4210
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4211
  } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4212
    hr->hr_clear(par, true /*clear_space*/);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4213
    list->insert_before_head(hr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4214
    freed_regions++;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4215
    // If we're using clear2, this should not be enabled.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4216
    // assert(!hr->in_cohort(), "Can't be both free and in a cohort.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4217
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4218
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4219
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4220
void G1CollectedHeap::finish_free_region_work(size_t pre_used,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4221
                                              size_t cleared_h_regions,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4222
                                              size_t freed_regions,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4223
                                              UncleanRegionList* list) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4224
  if (list != NULL && list->sz() > 0) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4225
    prepend_region_list_on_unclean_list(list);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4226
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4227
  // Acquire a lock, if we're parallel, to update possibly-shared
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4228
  // variables.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4229
  Mutex* lock = (n_par_threads() > 0) ? ParGCRareEvent_lock : NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4230
  {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4231
    MutexLockerEx x(lock, Mutex::_no_safepoint_check_flag);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4232
    _summary_bytes_used -= pre_used;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4233
    _num_humongous_regions -= (int) cleared_h_regions;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4234
    _free_regions += freed_regions;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4235
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4236
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4237
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4238
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4239
void G1CollectedHeap::dirtyCardsForYoungRegions(CardTableModRefBS* ct_bs, HeapRegion* list) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4240
  while (list != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4241
    guarantee( list->is_young(), "invariant" );
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4242
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4243
    HeapWord* bottom = list->bottom();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4244
    HeapWord* end = list->end();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4245
    MemRegion mr(bottom, end);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4246
    ct_bs->dirty(mr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4247
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4248
    list = list->get_next_young_region();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4249
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4250
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4251
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4252
void G1CollectedHeap::cleanUpCardTable() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4253
  CardTableModRefBS* ct_bs = (CardTableModRefBS*) (barrier_set());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4254
  double start = os::elapsedTime();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4255
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4256
  ct_bs->clear(_g1_committed);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4257
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4258
  // now, redirty the cards of the scan-only and survivor regions
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4259
  // (it seemed faster to do it this way, instead of iterating over
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4260
  // all regions and then clearing / dirtying as approprite)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4261
  dirtyCardsForYoungRegions(ct_bs, _young_list->first_scan_only_region());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4262
  dirtyCardsForYoungRegions(ct_bs, _young_list->first_survivor_region());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4263
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4264
  double elapsed = os::elapsedTime() - start;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4265
  g1_policy()->record_clear_ct_time( elapsed * 1000.0);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4266
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4267
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4268
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4269
void G1CollectedHeap::do_collection_pause_if_appropriate(size_t word_size) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4270
  // First do any popular regions.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4271
  HeapRegion* hr;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4272
  while ((hr = popular_region_to_evac()) != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4273
    evac_popular_region(hr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4274
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4275
  // Now do heuristic pauses.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4276
  if (g1_policy()->should_do_collection_pause(word_size)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4277
    do_collection_pause();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4278
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4279
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4280
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4281
void G1CollectedHeap::free_collection_set(HeapRegion* cs_head) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4282
  double young_time_ms     = 0.0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4283
  double non_young_time_ms = 0.0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4284
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4285
  G1CollectorPolicy* policy = g1_policy();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4286
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4287
  double start_sec = os::elapsedTime();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4288
  bool non_young = true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4289
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4290
  HeapRegion* cur = cs_head;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4291
  int age_bound = -1;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4292
  size_t rs_lengths = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4293
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4294
  while (cur != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4295
    if (non_young) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4296
      if (cur->is_young()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4297
        double end_sec = os::elapsedTime();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4298
        double elapsed_ms = (end_sec - start_sec) * 1000.0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4299
        non_young_time_ms += elapsed_ms;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4300
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4301
        start_sec = os::elapsedTime();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4302
        non_young = false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4303
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4304
    } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4305
      if (!cur->is_on_free_list()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4306
        double end_sec = os::elapsedTime();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4307
        double elapsed_ms = (end_sec - start_sec) * 1000.0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4308
        young_time_ms += elapsed_ms;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4309
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4310
        start_sec = os::elapsedTime();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4311
        non_young = true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4312
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4313
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4314
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4315
    rs_lengths += cur->rem_set()->occupied();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4316
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4317
    HeapRegion* next = cur->next_in_collection_set();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4318
    assert(cur->in_collection_set(), "bad CS");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4319
    cur->set_next_in_collection_set(NULL);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4320
    cur->set_in_collection_set(false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4321
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4322
    if (cur->is_young()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4323
      int index = cur->young_index_in_cset();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4324
      guarantee( index != -1, "invariant" );
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4325
      guarantee( (size_t)index < policy->young_cset_length(), "invariant" );
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4326
      size_t words_survived = _surviving_young_words[index];
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4327
      cur->record_surv_words_in_group(words_survived);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4328
    } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4329
      int index = cur->young_index_in_cset();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4330
      guarantee( index == -1, "invariant" );
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4331
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4332
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4333
    assert( (cur->is_young() && cur->young_index_in_cset() > -1) ||
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4334
            (!cur->is_young() && cur->young_index_in_cset() == -1),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4335
            "invariant" );
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4336
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4337
    if (!cur->evacuation_failed()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4338
      // And the region is empty.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4339
      assert(!cur->is_empty(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4340
             "Should not have empty regions in a CS.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4341
      free_region(cur);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4342
    } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4343
      guarantee( !cur->is_scan_only(), "should not be scan only" );
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4344
      cur->uninstall_surv_rate_group();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4345
      if (cur->is_young())
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4346
        cur->set_young_index_in_cset(-1);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4347
      cur->set_not_young();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4348
      cur->set_evacuation_failed(false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4349
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4350
    cur = next;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4351
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4352
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4353
  policy->record_max_rs_lengths(rs_lengths);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4354
  policy->cset_regions_freed();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4355
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4356
  double end_sec = os::elapsedTime();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4357
  double elapsed_ms = (end_sec - start_sec) * 1000.0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4358
  if (non_young)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4359
    non_young_time_ms += elapsed_ms;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4360
  else
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4361
    young_time_ms += elapsed_ms;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4362
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4363
  policy->record_young_free_cset_time_ms(young_time_ms);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4364
  policy->record_non_young_free_cset_time_ms(non_young_time_ms);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4365
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4366
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4367
HeapRegion*
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4368
G1CollectedHeap::alloc_region_from_unclean_list_locked(bool zero_filled) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4369
  assert(ZF_mon->owned_by_self(), "Precondition");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4370
  HeapRegion* res = pop_unclean_region_list_locked();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4371
  if (res != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4372
    assert(!res->continuesHumongous() &&
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4373
           res->zero_fill_state() != HeapRegion::Allocated,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4374
           "Only free regions on unclean list.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4375
    if (zero_filled) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4376
      res->ensure_zero_filled_locked();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4377
      res->set_zero_fill_allocated();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4378
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4379
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4380
  return res;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4381
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4382
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4383
HeapRegion* G1CollectedHeap::alloc_region_from_unclean_list(bool zero_filled) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4384
  MutexLockerEx zx(ZF_mon, Mutex::_no_safepoint_check_flag);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4385
  return alloc_region_from_unclean_list_locked(zero_filled);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4386
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4387
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4388
void G1CollectedHeap::put_region_on_unclean_list(HeapRegion* r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4389
  MutexLockerEx x(ZF_mon, Mutex::_no_safepoint_check_flag);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4390
  put_region_on_unclean_list_locked(r);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4391
  if (should_zf()) ZF_mon->notify_all(); // Wake up ZF thread.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4392
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4393
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4394
void G1CollectedHeap::set_unclean_regions_coming(bool b) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4395
  MutexLockerEx x(Cleanup_mon);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4396
  set_unclean_regions_coming_locked(b);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4397
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4398
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4399
void G1CollectedHeap::set_unclean_regions_coming_locked(bool b) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4400
  assert(Cleanup_mon->owned_by_self(), "Precondition");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4401
  _unclean_regions_coming = b;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4402
  // Wake up mutator threads that might be waiting for completeCleanup to
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4403
  // finish.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4404
  if (!b) Cleanup_mon->notify_all();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4405
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4406
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4407
void G1CollectedHeap::wait_for_cleanup_complete() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4408
  MutexLockerEx x(Cleanup_mon);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4409
  wait_for_cleanup_complete_locked();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4410
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4411
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4412
void G1CollectedHeap::wait_for_cleanup_complete_locked() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4413
  assert(Cleanup_mon->owned_by_self(), "precondition");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4414
  while (_unclean_regions_coming) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4415
    Cleanup_mon->wait();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4416
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4417
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4418
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4419
void
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4420
G1CollectedHeap::put_region_on_unclean_list_locked(HeapRegion* r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4421
  assert(ZF_mon->owned_by_self(), "precondition.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4422
  _unclean_region_list.insert_before_head(r);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4423
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4424
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4425
void
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4426
G1CollectedHeap::prepend_region_list_on_unclean_list(UncleanRegionList* list) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4427
  MutexLockerEx x(ZF_mon, Mutex::_no_safepoint_check_flag);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4428
  prepend_region_list_on_unclean_list_locked(list);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4429
  if (should_zf()) ZF_mon->notify_all(); // Wake up ZF thread.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4430
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4431
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4432
void
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4433
G1CollectedHeap::
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4434
prepend_region_list_on_unclean_list_locked(UncleanRegionList* list) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4435
  assert(ZF_mon->owned_by_self(), "precondition.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4436
  _unclean_region_list.prepend_list(list);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4437
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4438
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4439
HeapRegion* G1CollectedHeap::pop_unclean_region_list_locked() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4440
  assert(ZF_mon->owned_by_self(), "precondition.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4441
  HeapRegion* res = _unclean_region_list.pop();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4442
  if (res != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4443
    // Inform ZF thread that there's a new unclean head.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4444
    if (_unclean_region_list.hd() != NULL && should_zf())
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4445
      ZF_mon->notify_all();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4446
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4447
  return res;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4448
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4449
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4450
HeapRegion* G1CollectedHeap::peek_unclean_region_list_locked() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4451
  assert(ZF_mon->owned_by_self(), "precondition.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4452
  return _unclean_region_list.hd();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4453
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4454
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4455
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4456
bool G1CollectedHeap::move_cleaned_region_to_free_list_locked() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4457
  assert(ZF_mon->owned_by_self(), "Precondition");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4458
  HeapRegion* r = peek_unclean_region_list_locked();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4459
  if (r != NULL && r->zero_fill_state() == HeapRegion::ZeroFilled) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4460
    // Result of below must be equal to "r", since we hold the lock.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4461
    (void)pop_unclean_region_list_locked();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4462
    put_free_region_on_list_locked(r);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4463
    return true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4464
  } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4465
    return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4466
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4467
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4468
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4469
bool G1CollectedHeap::move_cleaned_region_to_free_list() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4470
  MutexLockerEx x(ZF_mon, Mutex::_no_safepoint_check_flag);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4471
  return move_cleaned_region_to_free_list_locked();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4472
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4473
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4474
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4475
void G1CollectedHeap::put_free_region_on_list_locked(HeapRegion* r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4476
  assert(ZF_mon->owned_by_self(), "precondition.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4477
  assert(_free_region_list_size == free_region_list_length(), "Inv");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4478
  assert(r->zero_fill_state() == HeapRegion::ZeroFilled,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4479
        "Regions on free list must be zero filled");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4480
  assert(!r->isHumongous(), "Must not be humongous.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4481
  assert(r->is_empty(), "Better be empty");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4482
  assert(!r->is_on_free_list(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4483
         "Better not already be on free list");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4484
  assert(!r->is_on_unclean_list(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4485
         "Better not already be on unclean list");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4486
  r->set_on_free_list(true);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4487
  r->set_next_on_free_list(_free_region_list);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4488
  _free_region_list = r;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4489
  _free_region_list_size++;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4490
  assert(_free_region_list_size == free_region_list_length(), "Inv");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4491
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4492
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4493
void G1CollectedHeap::put_free_region_on_list(HeapRegion* r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4494
  MutexLockerEx x(ZF_mon, Mutex::_no_safepoint_check_flag);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4495
  put_free_region_on_list_locked(r);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4496
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4497
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4498
HeapRegion* G1CollectedHeap::pop_free_region_list_locked() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4499
  assert(ZF_mon->owned_by_self(), "precondition.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4500
  assert(_free_region_list_size == free_region_list_length(), "Inv");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4501
  HeapRegion* res = _free_region_list;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4502
  if (res != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4503
    _free_region_list = res->next_from_free_list();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4504
    _free_region_list_size--;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4505
    res->set_on_free_list(false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4506
    res->set_next_on_free_list(NULL);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4507
    assert(_free_region_list_size == free_region_list_length(), "Inv");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4508
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4509
  return res;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4510
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4511
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4512
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4513
HeapRegion* G1CollectedHeap::alloc_free_region_from_lists(bool zero_filled) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4514
  // By self, or on behalf of self.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4515
  assert(Heap_lock->is_locked(), "Precondition");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4516
  HeapRegion* res = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4517
  bool first = true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4518
  while (res == NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4519
    if (zero_filled || !first) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4520
      MutexLockerEx x(ZF_mon, Mutex::_no_safepoint_check_flag);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4521
      res = pop_free_region_list_locked();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4522
      if (res != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4523
        assert(!res->zero_fill_is_allocated(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4524
               "No allocated regions on free list.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4525
        res->set_zero_fill_allocated();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4526
      } else if (!first) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4527
        break;  // We tried both, time to return NULL.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4528
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4529
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4530
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4531
    if (res == NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4532
      res = alloc_region_from_unclean_list(zero_filled);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4533
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4534
    assert(res == NULL ||
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4535
           !zero_filled ||
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4536
           res->zero_fill_is_allocated(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4537
           "We must have allocated the region we're returning");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4538
    first = false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4539
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4540
  return res;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4541
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4542
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4543
void G1CollectedHeap::remove_allocated_regions_from_lists() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4544
  MutexLockerEx x(ZF_mon, Mutex::_no_safepoint_check_flag);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4545
  {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4546
    HeapRegion* prev = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4547
    HeapRegion* cur = _unclean_region_list.hd();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4548
    while (cur != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4549
      HeapRegion* next = cur->next_from_unclean_list();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4550
      if (cur->zero_fill_is_allocated()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4551
        // Remove from the list.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4552
        if (prev == NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4553
          (void)_unclean_region_list.pop();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4554
        } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4555
          _unclean_region_list.delete_after(prev);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4556
        }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4557
        cur->set_on_unclean_list(false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4558
        cur->set_next_on_unclean_list(NULL);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4559
      } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4560
        prev = cur;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4561
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4562
      cur = next;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4563
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4564
    assert(_unclean_region_list.sz() == unclean_region_list_length(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4565
           "Inv");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4566
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4567
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4568
  {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4569
    HeapRegion* prev = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4570
    HeapRegion* cur = _free_region_list;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4571
    while (cur != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4572
      HeapRegion* next = cur->next_from_free_list();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4573
      if (cur->zero_fill_is_allocated()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4574
        // Remove from the list.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4575
        if (prev == NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4576
          _free_region_list = cur->next_from_free_list();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4577
        } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4578
          prev->set_next_on_free_list(cur->next_from_free_list());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4579
        }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4580
        cur->set_on_free_list(false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4581
        cur->set_next_on_free_list(NULL);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4582
        _free_region_list_size--;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4583
      } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4584
        prev = cur;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4585
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4586
      cur = next;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4587
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4588
    assert(_free_region_list_size == free_region_list_length(), "Inv");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4589
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4590
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4591
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4592
bool G1CollectedHeap::verify_region_lists() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4593
  MutexLockerEx x(ZF_mon, Mutex::_no_safepoint_check_flag);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4594
  return verify_region_lists_locked();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4595
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4596
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4597
bool G1CollectedHeap::verify_region_lists_locked() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4598
  HeapRegion* unclean = _unclean_region_list.hd();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4599
  while (unclean != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4600
    guarantee(unclean->is_on_unclean_list(), "Well, it is!");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4601
    guarantee(!unclean->is_on_free_list(), "Well, it shouldn't be!");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4602
    guarantee(unclean->zero_fill_state() != HeapRegion::Allocated,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4603
              "Everything else is possible.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4604
    unclean = unclean->next_from_unclean_list();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4605
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4606
  guarantee(_unclean_region_list.sz() == unclean_region_list_length(), "Inv");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4607
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4608
  HeapRegion* free_r = _free_region_list;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4609
  while (free_r != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4610
    assert(free_r->is_on_free_list(), "Well, it is!");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4611
    assert(!free_r->is_on_unclean_list(), "Well, it shouldn't be!");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4612
    switch (free_r->zero_fill_state()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4613
    case HeapRegion::NotZeroFilled:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4614
    case HeapRegion::ZeroFilling:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4615
      guarantee(false, "Should not be on free list.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4616
      break;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4617
    default:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4618
      // Everything else is possible.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4619
      break;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4620
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4621
    free_r = free_r->next_from_free_list();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4622
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4623
  guarantee(_free_region_list_size == free_region_list_length(), "Inv");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4624
  // If we didn't do an assertion...
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4625
  return true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4626
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4627
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4628
size_t G1CollectedHeap::free_region_list_length() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4629
  assert(ZF_mon->owned_by_self(), "precondition.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4630
  size_t len = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4631
  HeapRegion* cur = _free_region_list;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4632
  while (cur != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4633
    len++;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4634
    cur = cur->next_from_free_list();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4635
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4636
  return len;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4637
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4638
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4639
size_t G1CollectedHeap::unclean_region_list_length() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4640
  assert(ZF_mon->owned_by_self(), "precondition.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4641
  return _unclean_region_list.length();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4642
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4643
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4644
size_t G1CollectedHeap::n_regions() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4645
  return _hrs->length();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4646
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4647
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4648
size_t G1CollectedHeap::max_regions() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4649
  return
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4650
    (size_t)align_size_up(g1_reserved_obj_bytes(), HeapRegion::GrainBytes) /
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4651
    HeapRegion::GrainBytes;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4652
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4653
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4654
size_t G1CollectedHeap::free_regions() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4655
  /* Possibly-expensive assert.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4656
  assert(_free_regions == count_free_regions(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4657
         "_free_regions is off.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4658
  */
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4659
  return _free_regions;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4660
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4661
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4662
bool G1CollectedHeap::should_zf() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4663
  return _free_region_list_size < (size_t) G1ConcZFMaxRegions;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4664
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4665
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4666
class RegionCounter: public HeapRegionClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4667
  size_t _n;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4668
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4669
  RegionCounter() : _n(0) {}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4670
  bool doHeapRegion(HeapRegion* r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4671
    if (r->is_empty() && !r->popular()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4672
      assert(!r->isHumongous(), "H regions should not be empty.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4673
      _n++;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4674
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4675
    return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4676
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4677
  int res() { return (int) _n; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4678
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4679
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4680
size_t G1CollectedHeap::count_free_regions() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4681
  RegionCounter rc;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4682
  heap_region_iterate(&rc);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4683
  size_t n = rc.res();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4684
  if (_cur_alloc_region != NULL && _cur_alloc_region->is_empty())
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4685
    n--;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4686
  return n;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4687
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4688
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4689
size_t G1CollectedHeap::count_free_regions_list() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4690
  size_t n = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4691
  size_t o = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4692
  ZF_mon->lock_without_safepoint_check();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4693
  HeapRegion* cur = _free_region_list;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4694
  while (cur != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4695
    cur = cur->next_from_free_list();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4696
    n++;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4697
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4698
  size_t m = unclean_region_list_length();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4699
  ZF_mon->unlock();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4700
  return n + m;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4701
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4702
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4703
bool G1CollectedHeap::should_set_young_locked() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4704
  assert(heap_lock_held_for_gc(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4705
              "the heap lock should already be held by or for this thread");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4706
  return  (g1_policy()->in_young_gc_mode() &&
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4707
           g1_policy()->should_add_next_region_to_young_list());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4708
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4709
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4710
void G1CollectedHeap::set_region_short_lived_locked(HeapRegion* hr) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4711
  assert(heap_lock_held_for_gc(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4712
              "the heap lock should already be held by or for this thread");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4713
  _young_list->push_region(hr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4714
  g1_policy()->set_region_short_lived(hr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4715
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4716
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4717
class NoYoungRegionsClosure: public HeapRegionClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4718
private:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4719
  bool _success;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4720
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4721
  NoYoungRegionsClosure() : _success(true) { }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4722
  bool doHeapRegion(HeapRegion* r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4723
    if (r->is_young()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4724
      gclog_or_tty->print_cr("Region ["PTR_FORMAT", "PTR_FORMAT") tagged as young",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4725
                             r->bottom(), r->end());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4726
      _success = false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4727
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4728
    return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4729
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4730
  bool success() { return _success; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4731
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4732
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4733
bool G1CollectedHeap::check_young_list_empty(bool ignore_scan_only_list,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4734
                                             bool check_sample) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4735
  bool ret = true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4736
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4737
  ret = _young_list->check_list_empty(ignore_scan_only_list, check_sample);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4738
  if (!ignore_scan_only_list) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4739
    NoYoungRegionsClosure closure;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4740
    heap_region_iterate(&closure);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4741
    ret = ret && closure.success();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4742
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4743
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4744
  return ret;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4745
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4746
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4747
void G1CollectedHeap::empty_young_list() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4748
  assert(heap_lock_held_for_gc(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4749
              "the heap lock should already be held by or for this thread");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4750
  assert(g1_policy()->in_young_gc_mode(), "should be in young GC mode");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4751
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4752
  _young_list->empty_list();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4753
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4754
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4755
bool G1CollectedHeap::all_alloc_regions_no_allocs_since_save_marks() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4756
  bool no_allocs = true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4757
  for (int ap = 0; ap < GCAllocPurposeCount && no_allocs; ++ap) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4758
    HeapRegion* r = _gc_alloc_regions[ap];
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4759
    no_allocs = r == NULL || r->saved_mark_at_top();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4760
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4761
  return no_allocs;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4762
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4763
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4764
void G1CollectedHeap::all_alloc_regions_note_end_of_copying() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4765
  for (int ap = 0; ap < GCAllocPurposeCount; ++ap) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4766
    HeapRegion* r = _gc_alloc_regions[ap];
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4767
    if (r != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4768
      // Check for aliases.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4769
      bool has_processed_alias = false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4770
      for (int i = 0; i < ap; ++i) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4771
        if (_gc_alloc_regions[i] == r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4772
          has_processed_alias = true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4773
          break;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4774
        }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4775
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4776
      if (!has_processed_alias) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4777
        r->note_end_of_copying();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4778
        g1_policy()->record_after_bytes(r->used());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4779
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4780
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4781
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4782
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4783
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4784
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4785
// Done at the start of full GC.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4786
void G1CollectedHeap::tear_down_region_lists() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4787
  MutexLockerEx x(ZF_mon, Mutex::_no_safepoint_check_flag);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4788
  while (pop_unclean_region_list_locked() != NULL) ;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4789
  assert(_unclean_region_list.hd() == NULL && _unclean_region_list.sz() == 0,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4790
         "Postconditions of loop.")
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4791
  while (pop_free_region_list_locked() != NULL) ;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4792
  assert(_free_region_list == NULL, "Postcondition of loop.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4793
  if (_free_region_list_size != 0) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4794
    gclog_or_tty->print_cr("Size is %d.", _free_region_list_size);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4795
    print();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4796
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4797
  assert(_free_region_list_size == 0, "Postconditions of loop.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4798
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4799
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4800
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4801
class RegionResetter: public HeapRegionClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4802
  G1CollectedHeap* _g1;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4803
  int _n;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4804
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4805
  RegionResetter() : _g1(G1CollectedHeap::heap()), _n(0) {}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4806
  bool doHeapRegion(HeapRegion* r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4807
    if (r->continuesHumongous()) return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4808
    if (r->top() > r->bottom()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4809
      if (r->top() < r->end()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4810
        Copy::fill_to_words(r->top(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4811
                          pointer_delta(r->end(), r->top()));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4812
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4813
      r->set_zero_fill_allocated();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4814
    } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4815
      assert(r->is_empty(), "tautology");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4816
      if (r->popular()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4817
        if (r->zero_fill_state() != HeapRegion::Allocated) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4818
          r->ensure_zero_filled_locked();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4819
          r->set_zero_fill_allocated();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4820
        }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4821
      } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4822
        _n++;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4823
        switch (r->zero_fill_state()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4824
        case HeapRegion::NotZeroFilled:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4825
        case HeapRegion::ZeroFilling:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4826
          _g1->put_region_on_unclean_list_locked(r);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4827
          break;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4828
        case HeapRegion::Allocated:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4829
          r->set_zero_fill_complete();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4830
          // no break; go on to put on free list.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4831
        case HeapRegion::ZeroFilled:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4832
          _g1->put_free_region_on_list_locked(r);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4833
          break;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4834
        }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4835
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4836
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4837
    return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4838
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4839
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4840
  int getFreeRegionCount() {return _n;}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4841
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4842
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4843
// Done at the end of full GC.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4844
void G1CollectedHeap::rebuild_region_lists() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4845
  MutexLockerEx x(ZF_mon, Mutex::_no_safepoint_check_flag);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4846
  // This needs to go at the end of the full GC.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4847
  RegionResetter rs;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4848
  heap_region_iterate(&rs);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4849
  _free_regions = rs.getFreeRegionCount();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4850
  // Tell the ZF thread it may have work to do.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4851
  if (should_zf()) ZF_mon->notify_all();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4852
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4853
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4854
class UsedRegionsNeedZeroFillSetter: public HeapRegionClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4855
  G1CollectedHeap* _g1;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4856
  int _n;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4857
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4858
  UsedRegionsNeedZeroFillSetter() : _g1(G1CollectedHeap::heap()), _n(0) {}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4859
  bool doHeapRegion(HeapRegion* r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4860
    if (r->continuesHumongous()) return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4861
    if (r->top() > r->bottom()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4862
      // There are assertions in "set_zero_fill_needed()" below that
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4863
      // require top() == bottom(), so this is technically illegal.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4864
      // We'll skirt the law here, by making that true temporarily.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4865
      DEBUG_ONLY(HeapWord* save_top = r->top();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4866
                 r->set_top(r->bottom()));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4867
      r->set_zero_fill_needed();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4868
      DEBUG_ONLY(r->set_top(save_top));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4869
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4870
    return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4871
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4872
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4873
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4874
// Done at the start of full GC.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4875
void G1CollectedHeap::set_used_regions_to_need_zero_fill() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4876
  MutexLockerEx x(ZF_mon, Mutex::_no_safepoint_check_flag);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4877
  // This needs to go at the end of the full GC.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4878
  UsedRegionsNeedZeroFillSetter rs;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4879
  heap_region_iterate(&rs);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4880
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4881
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4882
class CountObjClosure: public ObjectClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4883
  size_t _n;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4884
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4885
  CountObjClosure() : _n(0) {}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4886
  void do_object(oop obj) { _n++; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4887
  size_t n() { return _n; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4888
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4889
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4890
size_t G1CollectedHeap::pop_object_used_objs() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4891
  size_t sum_objs = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4892
  for (int i = 0; i < G1NumPopularRegions; i++) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4893
    CountObjClosure cl;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4894
    _hrs->at(i)->object_iterate(&cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4895
    sum_objs += cl.n();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4896
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4897
  return sum_objs;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4898
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4899
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4900
size_t G1CollectedHeap::pop_object_used_bytes() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4901
  size_t sum_bytes = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4902
  for (int i = 0; i < G1NumPopularRegions; i++) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4903
    sum_bytes += _hrs->at(i)->used();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4904
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4905
  return sum_bytes;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4906
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4907
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4908
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4909
static int nq = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4910
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4911
HeapWord* G1CollectedHeap::allocate_popular_object(size_t word_size) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4912
  while (_cur_pop_hr_index < G1NumPopularRegions) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4913
    HeapRegion* cur_pop_region = _hrs->at(_cur_pop_hr_index);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4914
    HeapWord* res = cur_pop_region->allocate(word_size);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4915
    if (res != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4916
      // We account for popular objs directly in the used summary:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4917
      _summary_bytes_used += (word_size * HeapWordSize);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4918
      return res;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4919
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4920
    // Otherwise, try the next region (first making sure that we remember
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4921
    // the last "top" value as the "next_top_at_mark_start", so that
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4922
    // objects made popular during markings aren't automatically considered
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4923
    // live).
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4924
    cur_pop_region->note_end_of_copying();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4925
    // Otherwise, try the next region.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4926
    _cur_pop_hr_index++;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4927
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4928
  // XXX: For now !!!
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4929
  vm_exit_out_of_memory(word_size,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4930
                        "Not enough pop obj space (To Be Fixed)");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4931
  return NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4932
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4933
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4934
class HeapRegionList: public CHeapObj {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4935
  public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4936
  HeapRegion* hr;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4937
  HeapRegionList* next;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4938
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4939
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4940
void G1CollectedHeap::schedule_popular_region_evac(HeapRegion* r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4941
  // This might happen during parallel GC, so protect by this lock.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4942
  MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4943
  // We don't schedule regions whose evacuations are already pending, or
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4944
  // are already being evacuated.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4945
  if (!r->popular_pending() && !r->in_collection_set()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4946
    r->set_popular_pending(true);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4947
    if (G1TracePopularity) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4948
      gclog_or_tty->print_cr("Scheduling region "PTR_FORMAT" "
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4949
                             "["PTR_FORMAT", "PTR_FORMAT") for pop-object evacuation.",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4950
                             r, r->bottom(), r->end());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4951
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4952
    HeapRegionList* hrl = new HeapRegionList;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4953
    hrl->hr = r;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4954
    hrl->next = _popular_regions_to_be_evacuated;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4955
    _popular_regions_to_be_evacuated = hrl;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4956
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4957
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4958
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4959
HeapRegion* G1CollectedHeap::popular_region_to_evac() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4960
  MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4961
  HeapRegion* res = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4962
  while (_popular_regions_to_be_evacuated != NULL && res == NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4963
    HeapRegionList* hrl = _popular_regions_to_be_evacuated;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4964
    _popular_regions_to_be_evacuated = hrl->next;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4965
    res = hrl->hr;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4966
    // The G1RSPopLimit may have increased, so recheck here...
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4967
    if (res->rem_set()->occupied() < (size_t) G1RSPopLimit) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4968
      // Hah: don't need to schedule.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4969
      if (G1TracePopularity) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4970
        gclog_or_tty->print_cr("Unscheduling region "PTR_FORMAT" "
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4971
                               "["PTR_FORMAT", "PTR_FORMAT") "
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4972
                               "for pop-object evacuation (size %d < limit %d)",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4973
                               res, res->bottom(), res->end(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4974
                               res->rem_set()->occupied(), G1RSPopLimit);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4975
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4976
      res->set_popular_pending(false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4977
      res = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4978
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4979
    // We do not reset res->popular() here; if we did so, it would allow
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4980
    // the region to be "rescheduled" for popularity evacuation.  Instead,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4981
    // this is done in the collection pause, with the world stopped.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4982
    // So the invariant is that the regions in the list have the popularity
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4983
    // boolean set, but having the boolean set does not imply membership
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4984
    // on the list (though there can at most one such pop-pending region
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4985
    // not on the list at any time).
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4986
    delete hrl;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4987
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4988
  return res;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4989
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4990
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4991
void G1CollectedHeap::evac_popular_region(HeapRegion* hr) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4992
  while (true) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4993
    // Don't want to do a GC pause while cleanup is being completed!
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4994
    wait_for_cleanup_complete();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4995
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4996
    // Read the GC count while holding the Heap_lock
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4997
    int gc_count_before = SharedHeap::heap()->total_collections();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4998
    g1_policy()->record_stop_world_start();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  4999
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5000
    {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5001
      MutexUnlocker mu(Heap_lock);  // give up heap lock, execute gets it back
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5002
      VM_G1PopRegionCollectionPause op(gc_count_before, hr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5003
      VMThread::execute(&op);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5004
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5005
      // If the prolog succeeded, we didn't do a GC for this.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5006
      if (op.prologue_succeeded()) break;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5007
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5008
    // Otherwise we didn't.  We should recheck the size, though, since
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5009
    // the limit may have increased...
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5010
    if (hr->rem_set()->occupied() < (size_t) G1RSPopLimit) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5011
      hr->set_popular_pending(false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5012
      break;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5013
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5014
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5015
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5016
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5017
void G1CollectedHeap::atomic_inc_obj_rc(oop obj) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5018
  Atomic::inc(obj_rc_addr(obj));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5019
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5020
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5021
class CountRCClosure: public OopsInHeapRegionClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5022
  G1CollectedHeap* _g1h;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5023
  bool _parallel;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5024
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5025
  CountRCClosure(G1CollectedHeap* g1h) :
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5026
    _g1h(g1h), _parallel(ParallelGCThreads > 0)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5027
  {}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5028
  void do_oop(narrowOop* p) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5029
    guarantee(false, "NYI");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5030
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5031
  void do_oop(oop* p) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5032
    oop obj = *p;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5033
    assert(obj != NULL, "Precondition.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5034
    if (_parallel) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5035
      // We go sticky at the limit to avoid excess contention.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5036
      // If we want to track the actual RC's further, we'll need to keep a
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5037
      // per-thread hash table or something for the popular objects.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5038
      if (_g1h->obj_rc(obj) < G1ObjPopLimit) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5039
        _g1h->atomic_inc_obj_rc(obj);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5040
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5041
    } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5042
      _g1h->inc_obj_rc(obj);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5043
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5044
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5045
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5046
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5047
class EvacPopObjClosure: public ObjectClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5048
  G1CollectedHeap* _g1h;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5049
  size_t _pop_objs;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5050
  size_t _max_rc;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5051
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5052
  EvacPopObjClosure(G1CollectedHeap* g1h) :
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5053
    _g1h(g1h), _pop_objs(0), _max_rc(0) {}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5054
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5055
  void do_object(oop obj) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5056
    size_t rc = _g1h->obj_rc(obj);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5057
    _max_rc = MAX2(rc, _max_rc);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5058
    if (rc >= (size_t) G1ObjPopLimit) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5059
      _g1h->_pop_obj_rc_at_copy.add((double)rc);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5060
      size_t word_sz = obj->size();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5061
      HeapWord* new_pop_loc = _g1h->allocate_popular_object(word_sz);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5062
      oop new_pop_obj = (oop)new_pop_loc;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5063
      Copy::aligned_disjoint_words((HeapWord*)obj, new_pop_loc, word_sz);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5064
      obj->forward_to(new_pop_obj);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5065
      G1ScanAndBalanceClosure scan_and_balance(_g1h);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5066
      new_pop_obj->oop_iterate_backwards(&scan_and_balance);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5067
      // preserve "next" mark bit if marking is in progress.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5068
      if (_g1h->mark_in_progress() && !_g1h->is_obj_ill(obj)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5069
        _g1h->concurrent_mark()->markAndGrayObjectIfNecessary(new_pop_obj);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5070
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5071
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5072
      if (G1TracePopularity) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5073
        gclog_or_tty->print_cr("Found obj " PTR_FORMAT " of word size " SIZE_FORMAT
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5074
                               " pop (%d), move to " PTR_FORMAT,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5075
                               (void*) obj, word_sz,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5076
                               _g1h->obj_rc(obj), (void*) new_pop_obj);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5077
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5078
      _pop_objs++;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5079
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5080
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5081
  size_t pop_objs() { return _pop_objs; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5082
  size_t max_rc() { return _max_rc; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5083
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5084
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5085
class G1ParCountRCTask : public AbstractGangTask {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5086
  G1CollectedHeap* _g1h;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5087
  BitMap _bm;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5088
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5089
  size_t getNCards() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5090
    return (_g1h->capacity() + G1BlockOffsetSharedArray::N_bytes - 1)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5091
      / G1BlockOffsetSharedArray::N_bytes;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5092
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5093
  CountRCClosure _count_rc_closure;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5094
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5095
  G1ParCountRCTask(G1CollectedHeap* g1h) :
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5096
    AbstractGangTask("G1 Par RC Count task"),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5097
    _g1h(g1h), _bm(getNCards()), _count_rc_closure(g1h)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5098
  {}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5099
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5100
  void work(int i) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5101
    ResourceMark rm;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5102
    HandleMark   hm;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5103
    _g1h->g1_rem_set()->oops_into_collection_set_do(&_count_rc_closure, i);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5104
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5105
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5106
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5107
void G1CollectedHeap::popularity_pause_preamble(HeapRegion* popular_region) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5108
  // We're evacuating a single region (for popularity).
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5109
  if (G1TracePopularity) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5110
    gclog_or_tty->print_cr("Doing pop region pause for ["PTR_FORMAT", "PTR_FORMAT")",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5111
                           popular_region->bottom(), popular_region->end());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5112
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5113
  g1_policy()->set_single_region_collection_set(popular_region);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5114
  size_t max_rc;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5115
  if (!compute_reference_counts_and_evac_popular(popular_region,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5116
                                                 &max_rc)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5117
    // We didn't evacuate any popular objects.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5118
    // We increase the RS popularity limit, to prevent this from
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5119
    // happening in the future.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5120
    if (G1RSPopLimit < (1 << 30)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5121
      G1RSPopLimit *= 2;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5122
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5123
    // For now, interesting enough for a message:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5124
#if 1
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5125
    gclog_or_tty->print_cr("In pop region pause for ["PTR_FORMAT", "PTR_FORMAT"), "
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5126
                           "failed to find a pop object (max = %d).",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5127
                           popular_region->bottom(), popular_region->end(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5128
                           max_rc);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5129
    gclog_or_tty->print_cr("Increased G1RSPopLimit to %d.", G1RSPopLimit);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5130
#endif // 0
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5131
    // Also, we reset the collection set to NULL, to make the rest of
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5132
    // the collection do nothing.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5133
    assert(popular_region->next_in_collection_set() == NULL,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5134
           "should be single-region.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5135
    popular_region->set_in_collection_set(false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5136
    popular_region->set_popular_pending(false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5137
    g1_policy()->clear_collection_set();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5138
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5139
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5140
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5141
bool G1CollectedHeap::
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5142
compute_reference_counts_and_evac_popular(HeapRegion* popular_region,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5143
                                          size_t* max_rc) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5144
  HeapWord* rc_region_bot;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5145
  HeapWord* rc_region_end;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5146
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5147
  // Set up the reference count region.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5148
  HeapRegion* rc_region = newAllocRegion(HeapRegion::GrainWords);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5149
  if (rc_region != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5150
    rc_region_bot = rc_region->bottom();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5151
    rc_region_end = rc_region->end();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5152
  } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5153
    rc_region_bot = NEW_C_HEAP_ARRAY(HeapWord, HeapRegion::GrainWords);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5154
    if (rc_region_bot == NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5155
      vm_exit_out_of_memory(HeapRegion::GrainWords,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5156
                            "No space for RC region.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5157
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5158
    rc_region_end = rc_region_bot + HeapRegion::GrainWords;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5159
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5160
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5161
  if (G1TracePopularity)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5162
    gclog_or_tty->print_cr("RC region is ["PTR_FORMAT", "PTR_FORMAT")",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5163
                           rc_region_bot, rc_region_end);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5164
  if (rc_region_bot > popular_region->bottom()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5165
    _rc_region_above = true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5166
    _rc_region_diff =
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5167
      pointer_delta(rc_region_bot, popular_region->bottom(), 1);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5168
  } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5169
    assert(rc_region_bot < popular_region->bottom(), "Can't be equal.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5170
    _rc_region_above = false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5171
    _rc_region_diff =
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5172
      pointer_delta(popular_region->bottom(), rc_region_bot, 1);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5173
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5174
  g1_policy()->record_pop_compute_rc_start();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5175
  // Count external references.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5176
  g1_rem_set()->prepare_for_oops_into_collection_set_do();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5177
  if (ParallelGCThreads > 0) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5178
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5179
    set_par_threads(workers()->total_workers());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5180
    G1ParCountRCTask par_count_rc_task(this);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5181
    workers()->run_task(&par_count_rc_task);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5182
    set_par_threads(0);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5183
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5184
  } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5185
    CountRCClosure count_rc_closure(this);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5186
    g1_rem_set()->oops_into_collection_set_do(&count_rc_closure, 0);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5187
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5188
  g1_rem_set()->cleanup_after_oops_into_collection_set_do();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5189
  g1_policy()->record_pop_compute_rc_end();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5190
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5191
  // Now evacuate popular objects.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5192
  g1_policy()->record_pop_evac_start();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5193
  EvacPopObjClosure evac_pop_obj_cl(this);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5194
  popular_region->object_iterate(&evac_pop_obj_cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5195
  *max_rc = evac_pop_obj_cl.max_rc();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5196
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5197
  // Make sure the last "top" value of the current popular region is copied
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5198
  // as the "next_top_at_mark_start", so that objects made popular during
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5199
  // markings aren't automatically considered live.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5200
  HeapRegion* cur_pop_region = _hrs->at(_cur_pop_hr_index);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5201
  cur_pop_region->note_end_of_copying();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5202
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5203
  if (rc_region != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5204
    free_region(rc_region);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5205
  } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5206
    FREE_C_HEAP_ARRAY(HeapWord, rc_region_bot);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5207
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5208
  g1_policy()->record_pop_evac_end();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5209
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5210
  return evac_pop_obj_cl.pop_objs() > 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5211
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5212
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5213
class CountPopObjInfoClosure: public HeapRegionClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5214
  size_t _objs;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5215
  size_t _bytes;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5216
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5217
  class CountObjClosure: public ObjectClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5218
    int _n;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5219
  public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5220
    CountObjClosure() : _n(0) {}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5221
    void do_object(oop obj) { _n++; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5222
    size_t n() { return _n; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5223
  };
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5224
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5225
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5226
  CountPopObjInfoClosure() : _objs(0), _bytes(0) {}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5227
  bool doHeapRegion(HeapRegion* r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5228
    _bytes += r->used();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5229
    CountObjClosure blk;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5230
    r->object_iterate(&blk);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5231
    _objs += blk.n();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5232
    return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5233
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5234
  size_t objs() { return _objs; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5235
  size_t bytes() { return _bytes; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5236
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5237
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5238
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5239
void G1CollectedHeap::print_popularity_summary_info() const {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5240
  CountPopObjInfoClosure blk;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5241
  for (int i = 0; i <= _cur_pop_hr_index; i++) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5242
    blk.doHeapRegion(_hrs->at(i));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5243
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5244
  gclog_or_tty->print_cr("\nPopular objects: %d objs, %d bytes.",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5245
                         blk.objs(), blk.bytes());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5246
  gclog_or_tty->print_cr("   RC at copy = [avg = %5.2f, max = %5.2f, sd = %5.2f].",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5247
                _pop_obj_rc_at_copy.avg(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5248
                _pop_obj_rc_at_copy.maximum(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5249
                _pop_obj_rc_at_copy.sd());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5250
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5251
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5252
void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5253
  _refine_cte_cl->set_concurrent(concurrent);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5254
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5255
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5256
#ifndef PRODUCT
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5257
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5258
class PrintHeapRegionClosure: public HeapRegionClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5259
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5260
  bool doHeapRegion(HeapRegion *r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5261
    gclog_or_tty->print("Region: "PTR_FORMAT":", r);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5262
    if (r != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5263
      if (r->is_on_free_list())
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5264
        gclog_or_tty->print("Free ");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5265
      if (r->is_young())
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5266
        gclog_or_tty->print("Young ");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5267
      if (r->isHumongous())
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5268
        gclog_or_tty->print("Is Humongous ");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5269
      r->print();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5270
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5271
    return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5272
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5273
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5274
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5275
class SortHeapRegionClosure : public HeapRegionClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5276
  size_t young_regions,free_regions, unclean_regions;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5277
  size_t hum_regions, count;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5278
  size_t unaccounted, cur_unclean, cur_alloc;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5279
  size_t total_free;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5280
  HeapRegion* cur;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5281
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5282
  SortHeapRegionClosure(HeapRegion *_cur) : cur(_cur), young_regions(0),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5283
    free_regions(0), unclean_regions(0),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5284
    hum_regions(0),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5285
    count(0), unaccounted(0),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5286
    cur_alloc(0), total_free(0)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5287
  {}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5288
  bool doHeapRegion(HeapRegion *r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5289
    count++;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5290
    if (r->is_on_free_list()) free_regions++;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5291
    else if (r->is_on_unclean_list()) unclean_regions++;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5292
    else if (r->isHumongous())  hum_regions++;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5293
    else if (r->is_young()) young_regions++;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5294
    else if (r == cur) cur_alloc++;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5295
    else unaccounted++;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5296
    return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5297
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5298
  void print() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5299
    total_free = free_regions + unclean_regions;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5300
    gclog_or_tty->print("%d regions\n", count);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5301
    gclog_or_tty->print("%d free: free_list = %d unclean = %d\n",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5302
                        total_free, free_regions, unclean_regions);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5303
    gclog_or_tty->print("%d humongous %d young\n",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5304
                        hum_regions, young_regions);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5305
    gclog_or_tty->print("%d cur_alloc\n", cur_alloc);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5306
    gclog_or_tty->print("UHOH unaccounted = %d\n", unaccounted);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5307
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5308
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5309
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5310
void G1CollectedHeap::print_region_counts() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5311
  SortHeapRegionClosure sc(_cur_alloc_region);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5312
  PrintHeapRegionClosure cl;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5313
  heap_region_iterate(&cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5314
  heap_region_iterate(&sc);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5315
  sc.print();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5316
  print_region_accounting_info();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5317
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5318
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5319
bool G1CollectedHeap::regions_accounted_for() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5320
  // TODO: regions accounting for young/survivor/tenured
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5321
  return true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5322
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5323
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5324
bool G1CollectedHeap::print_region_accounting_info() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5325
  gclog_or_tty->print_cr("P regions: %d.", G1NumPopularRegions);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5326
  gclog_or_tty->print_cr("Free regions: %d (count: %d count list %d) (clean: %d unclean: %d).",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5327
                         free_regions(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5328
                         count_free_regions(), count_free_regions_list(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5329
                         _free_region_list_size, _unclean_region_list.sz());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5330
  gclog_or_tty->print_cr("cur_alloc: %d.",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5331
                         (_cur_alloc_region == NULL ? 0 : 1));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5332
  gclog_or_tty->print_cr("H regions: %d.", _num_humongous_regions);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5333
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5334
  // TODO: check regions accounting for young/survivor/tenured
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5335
  return true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5336
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5337
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5338
bool G1CollectedHeap::is_in_closed_subset(const void* p) const {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5339
  HeapRegion* hr = heap_region_containing(p);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5340
  if (hr == NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5341
    return is_in_permanent(p);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5342
  } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5343
    return hr->is_in(p);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5344
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5345
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5346
#endif // PRODUCT
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5347
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5348
void G1CollectedHeap::g1_unimplemented() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5349
  // Unimplemented();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5350
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5351
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5352
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5353
// Local Variables: ***
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5354
// c-indentation-style: gnu ***
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  5355
// End: ***