hotspot/src/share/vm/gc_implementation/g1/g1RemSet.cpp
author tonyp
Wed, 18 Mar 2009 11:37:48 -0400
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parent 2154 72a9b7284ccf
parent 2250 36d1eb1bb075
child 2260 219013f6a311
permissions -rw-r--r--
Merge
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/*
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 * Copyright 2001-2009 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/_g1RemSet.cpp.incl"
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#define CARD_REPEAT_HISTO 0
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#if CARD_REPEAT_HISTO
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static size_t ct_freq_sz;
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static jbyte* ct_freq = NULL;
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void init_ct_freq_table(size_t heap_sz_bytes) {
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  if (ct_freq == NULL) {
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    ct_freq_sz = heap_sz_bytes/CardTableModRefBS::card_size;
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    ct_freq = new jbyte[ct_freq_sz];
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    for (size_t j = 0; j < ct_freq_sz; j++) ct_freq[j] = 0;
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  }
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}
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void ct_freq_note_card(size_t index) {
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  assert(0 <= index && index < ct_freq_sz, "Bounds error.");
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  if (ct_freq[index] < 100) { ct_freq[index]++; }
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}
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static IntHistogram card_repeat_count(10, 10);
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void ct_freq_update_histo_and_reset() {
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  for (size_t j = 0; j < ct_freq_sz; j++) {
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    card_repeat_count.add_entry(ct_freq[j]);
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    ct_freq[j] = 0;
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  }
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}
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#endif
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class IntoCSOopClosure: public OopsInHeapRegionClosure {
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  OopsInHeapRegionClosure* _blk;
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  G1CollectedHeap* _g1;
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  IntoCSOopClosure(G1CollectedHeap* g1, OopsInHeapRegionClosure* blk) :
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    _g1(g1), _blk(blk) {}
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  void set_region(HeapRegion* from) {
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    _blk->set_region(from);
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  }
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  virtual void do_oop(narrowOop* p) {
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    guarantee(false, "NYI");
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  }
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  virtual void do_oop(oop* p) {
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    oop obj = *p;
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    if (_g1->obj_in_cs(obj)) _blk->do_oop(p);
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  }
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  bool apply_to_weak_ref_discovered_field() { return true; }
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  bool idempotent() { return true; }
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};
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class IntoCSRegionClosure: public HeapRegionClosure {
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  IntoCSOopClosure _blk;
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  G1CollectedHeap* _g1;
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  IntoCSRegionClosure(G1CollectedHeap* g1, OopsInHeapRegionClosure* blk) :
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    _g1(g1), _blk(g1, blk) {}
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  bool doHeapRegion(HeapRegion* r) {
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    if (!r->in_collection_set()) {
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      _blk.set_region(r);
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      if (r->isHumongous()) {
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        if (r->startsHumongous()) {
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          oop obj = oop(r->bottom());
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          obj->oop_iterate(&_blk);
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        }
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      } else {
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        r->oop_before_save_marks_iterate(&_blk);
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      }
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    }
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    return false;
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  }
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};
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void
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StupidG1RemSet::oops_into_collection_set_do(OopsInHeapRegionClosure* oc,
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                                            int worker_i) {
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  IntoCSRegionClosure rc(_g1, oc);
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  _g1->heap_region_iterate(&rc);
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}
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class UpdateRSOutOfRegionClosure: public HeapRegionClosure {
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  G1CollectedHeap*    _g1h;
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  ModRefBarrierSet*   _mr_bs;
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  UpdateRSOopClosure  _cl;
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  int _worker_i;
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  UpdateRSOutOfRegionClosure(G1CollectedHeap* g1, int worker_i = 0) :
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    _cl(g1->g1_rem_set()->as_HRInto_G1RemSet(), worker_i),
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    _mr_bs(g1->mr_bs()),
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    _worker_i(worker_i),
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    _g1h(g1)
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    {}
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  bool doHeapRegion(HeapRegion* r) {
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    if (!r->in_collection_set() && !r->continuesHumongous()) {
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      _cl.set_from(r);
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      r->set_next_filter_kind(HeapRegionDCTOC::OutOfRegionFilterKind);
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      _mr_bs->mod_oop_in_space_iterate(r, &_cl, true, true);
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    }
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    return false;
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  }
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};
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class VerifyRSCleanCardOopClosure: public OopClosure {
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  G1CollectedHeap* _g1;
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  VerifyRSCleanCardOopClosure(G1CollectedHeap* g1) : _g1(g1) {}
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  virtual void do_oop(narrowOop* p) {
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    guarantee(false, "NYI");
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  }
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  virtual void do_oop(oop* p) {
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    oop obj = *p;
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    HeapRegion* to = _g1->heap_region_containing(obj);
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    guarantee(to == NULL || !to->in_collection_set(),
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              "Missed a rem set member.");
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  }
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};
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HRInto_G1RemSet::HRInto_G1RemSet(G1CollectedHeap* g1, CardTableModRefBS* ct_bs)
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  : G1RemSet(g1), _ct_bs(ct_bs), _g1p(_g1->g1_policy()),
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    _cg1r(g1->concurrent_g1_refine()),
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    _par_traversal_in_progress(false), _new_refs(NULL),
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    _cards_scanned(NULL), _total_cards_scanned(0)
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{
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  _seq_task = new SubTasksDone(NumSeqTasks);
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  guarantee(n_workers() > 0, "There should be some workers");
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  _new_refs = NEW_C_HEAP_ARRAY(GrowableArray<oop*>*, n_workers());
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  for (uint i = 0; i < n_workers(); i++) {
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    _new_refs[i] = new (ResourceObj::C_HEAP) GrowableArray<oop*>(8192,true);
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  }
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}
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HRInto_G1RemSet::~HRInto_G1RemSet() {
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  delete _seq_task;
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  for (uint i = 0; i < n_workers(); i++) {
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    delete _new_refs[i];
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  }
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  FREE_C_HEAP_ARRAY(GrowableArray<oop*>*, _new_refs);
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}
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void CountNonCleanMemRegionClosure::do_MemRegion(MemRegion mr) {
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  if (_g1->is_in_g1_reserved(mr.start())) {
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    _n += (int) ((mr.byte_size() / CardTableModRefBS::card_size));
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    if (_start_first == NULL) _start_first = mr.start();
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  }
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}
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class ScanRSClosure : public HeapRegionClosure {
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  size_t _cards_done, _cards;
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  G1CollectedHeap* _g1h;
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  OopsInHeapRegionClosure* _oc;
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  G1BlockOffsetSharedArray* _bot_shared;
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  CardTableModRefBS *_ct_bs;
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  int _worker_i;
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  bool _try_claimed;
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public:
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  ScanRSClosure(OopsInHeapRegionClosure* oc, int worker_i) :
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    _oc(oc),
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    _cards(0),
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    _cards_done(0),
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    _worker_i(worker_i),
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    _try_claimed(false)
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  {
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    _g1h = G1CollectedHeap::heap();
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    _bot_shared = _g1h->bot_shared();
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    _ct_bs = (CardTableModRefBS*) (_g1h->barrier_set());
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  }
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  void set_try_claimed() { _try_claimed = true; }
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  void scanCard(size_t index, HeapRegion *r) {
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    _cards_done++;
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    DirtyCardToOopClosure* cl =
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      r->new_dcto_closure(_oc,
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                         CardTableModRefBS::Precise,
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                         HeapRegionDCTOC::IntoCSFilterKind);
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    // Set the "from" region in the closure.
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    _oc->set_region(r);
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    HeapWord* card_start = _bot_shared->address_for_index(index);
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    HeapWord* card_end = card_start + G1BlockOffsetSharedArray::N_words;
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    Space *sp = SharedHeap::heap()->space_containing(card_start);
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    MemRegion sm_region;
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    if (ParallelGCThreads > 0) {
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      // first find the used area
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      sm_region = sp->used_region_at_save_marks();
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    } else {
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      // The closure is not idempotent.  We shouldn't look at objects
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      // allocated during the GC.
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      sm_region = sp->used_region_at_save_marks();
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    }
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    MemRegion mr = sm_region.intersection(MemRegion(card_start,card_end));
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    if (!mr.is_empty()) {
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      cl->do_MemRegion(mr);
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    }
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  }
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  void printCard(HeapRegion* card_region, size_t card_index,
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                 HeapWord* card_start) {
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    gclog_or_tty->print_cr("T %d Region [" PTR_FORMAT ", " PTR_FORMAT ") "
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                           "RS names card %p: "
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                           "[" PTR_FORMAT ", " PTR_FORMAT ")",
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                           _worker_i,
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                           card_region->bottom(), card_region->end(),
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                           card_index,
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                           card_start, card_start + G1BlockOffsetSharedArray::N_words);
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  }
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  bool doHeapRegion(HeapRegion* r) {
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    assert(r->in_collection_set(), "should only be called on elements of CS.");
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    HeapRegionRemSet* hrrs = r->rem_set();
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    if (hrrs->iter_is_complete()) return false; // All done.
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    if (!_try_claimed && !hrrs->claim_iter()) return false;
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    // If we didn't return above, then
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    //   _try_claimed || r->claim_iter()
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    // is true: either we're supposed to work on claimed-but-not-complete
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    // regions, or we successfully claimed the region.
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    HeapRegionRemSetIterator* iter = _g1h->rem_set_iterator(_worker_i);
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    hrrs->init_iterator(iter);
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    size_t card_index;
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    while (iter->has_next(card_index)) {
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      HeapWord* card_start = _g1h->bot_shared()->address_for_index(card_index);
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#if 0
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      gclog_or_tty->print("Rem set iteration yielded card [" PTR_FORMAT ", " PTR_FORMAT ").\n",
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                          card_start, card_start + CardTableModRefBS::card_size_in_words);
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#endif
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      HeapRegion* card_region = _g1h->heap_region_containing(card_start);
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      assert(card_region != NULL, "Yielding cards not in the heap?");
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      _cards++;
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      if (!card_region->in_collection_set()) {
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        // If the card is dirty, then we will scan it during updateRS.
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        if (!_ct_bs->is_card_claimed(card_index) &&
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            !_ct_bs->is_card_dirty(card_index)) {
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          assert(_ct_bs->is_card_clean(card_index) ||
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                 _ct_bs->is_card_claimed(card_index) ||
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                 _ct_bs->is_card_deferred(card_index),
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                 "Card is either clean, claimed or deferred");
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          if (_ct_bs->claim_card(card_index))
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            scanCard(card_index, card_region);
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        }
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      }
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    }
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    hrrs->set_iter_complete();
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    return false;
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  }
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  // Set all cards back to clean.
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  void cleanup() {_g1h->cleanUpCardTable();}
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  size_t cards_done() { return _cards_done;}
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  size_t cards_looked_up() { return _cards;}
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};
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// We want the parallel threads to start their scanning at
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// different collection set regions to avoid contention.
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// If we have:
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//          n collection set regions
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//          p threads
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// Then thread t will start at region t * floor (n/p)
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HeapRegion* HRInto_G1RemSet::calculateStartRegion(int worker_i) {
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  HeapRegion* result = _g1p->collection_set();
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  if (ParallelGCThreads > 0) {
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    size_t cs_size = _g1p->collection_set_size();
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    int n_workers = _g1->workers()->total_workers();
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    size_t cs_spans = cs_size / n_workers;
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    size_t ind      = cs_spans * worker_i;
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    for (size_t i = 0; i < ind; i++)
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      result = result->next_in_collection_set();
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  }
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  return result;
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}
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void HRInto_G1RemSet::scanRS(OopsInHeapRegionClosure* oc, int worker_i) {
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  double rs_time_start = os::elapsedTime();
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  HeapRegion *startRegion = calculateStartRegion(worker_i);
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  BufferingOopsInHeapRegionClosure boc(oc);
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  ScanRSClosure scanRScl(&boc, worker_i);
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  _g1->collection_set_iterate_from(startRegion, &scanRScl);
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  scanRScl.set_try_claimed();
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  _g1->collection_set_iterate_from(startRegion, &scanRScl);
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   311
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  boc.done();
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  double closure_app_time_sec = boc.closure_app_seconds();
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  double scan_rs_time_sec = (os::elapsedTime() - rs_time_start) -
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    closure_app_time_sec;
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  double closure_app_time_ms = closure_app_time_sec * 1000.0;
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   317
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  assert( _cards_scanned != NULL, "invariant" );
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  _cards_scanned[worker_i] = scanRScl.cards_done();
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  _g1p->record_scan_rs_start_time(worker_i, rs_time_start * 1000.0);
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  _g1p->record_scan_rs_time(worker_i, scan_rs_time_sec * 1000.0);
2142
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   324
  double scan_new_refs_time_ms = _g1p->get_scan_new_refs_time(worker_i);
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   325
  if (scan_new_refs_time_ms > 0.0) {
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    closure_app_time_ms += scan_new_refs_time_ms;
1374
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  }
2142
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   328
1374
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  _g1p->record_obj_copy_time(worker_i, closure_app_time_ms);
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   330
}
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   331
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   332
void HRInto_G1RemSet::updateRS(int worker_i) {
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   333
  ConcurrentG1Refine* cg1r = _g1->concurrent_g1_refine();
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   334
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   335
  double start = os::elapsedTime();
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   336
  _g1p->record_update_rs_start_time(worker_i, start * 1000.0);
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   337
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   338
  if (G1RSBarrierUseQueue && !cg1r->do_traversal()) {
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   339
    // Apply the appropriate closure to all remaining log entries.
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   340
    _g1->iterate_dirty_card_closure(false, worker_i);
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   341
    // Now there should be no dirty cards.
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diff changeset
   342
    if (G1RSLogCheckCardTable) {
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   343
      CountNonCleanMemRegionClosure cl(_g1);
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   344
      _ct_bs->mod_card_iterate(&cl);
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   345
      // XXX This isn't true any more: keeping cards of young regions
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diff changeset
   346
      // marked dirty broke it.  Need some reasonable fix.
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   347
      guarantee(cl.n() == 0, "Card table should be clean.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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diff changeset
   348
    }
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diff changeset
   349
  } else {
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   350
    UpdateRSOutOfRegionClosure update_rs(_g1, worker_i);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   351
    _g1->heap_region_iterate(&update_rs);
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diff changeset
   352
    // We did a traversal; no further one is necessary.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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diff changeset
   353
    if (G1RSBarrierUseQueue) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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diff changeset
   354
      assert(cg1r->do_traversal(), "Or we shouldn't have gotten here.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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diff changeset
   355
      cg1r->set_pya_cancel();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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diff changeset
   356
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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diff changeset
   357
    if (_cg1r->use_cache()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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diff changeset
   358
      _cg1r->clear_and_record_card_counts();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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diff changeset
   359
      _cg1r->clear_hot_cache();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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diff changeset
   360
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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diff changeset
   361
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   362
  _g1p->record_update_rs_time(worker_i, (os::elapsedTime() - start) * 1000.0);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   363
}
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   364
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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diff changeset
   365
#ifndef PRODUCT
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   366
class PrintRSClosure : public HeapRegionClosure {
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   367
  int _count;
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   368
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   369
  PrintRSClosure() : _count(0) {}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   370
  bool doHeapRegion(HeapRegion* r) {
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   371
    HeapRegionRemSet* hrrs = r->rem_set();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   372
    _count += (int) hrrs->occupied();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   373
    if (hrrs->occupied() == 0) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   374
      gclog_or_tty->print("Heap Region [" PTR_FORMAT ", " PTR_FORMAT ") "
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   375
                          "has no remset entries\n",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   376
                          r->bottom(), r->end());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   377
    } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   378
      gclog_or_tty->print("Printing rem set for heap region [" PTR_FORMAT ", " PTR_FORMAT ")\n",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   379
                          r->bottom(), r->end());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   380
      r->print();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   381
      hrrs->print();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   382
      gclog_or_tty->print("\nDone printing rem set\n");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
   383
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   384
    return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   385
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   386
  int occupied() {return _count;}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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diff changeset
   387
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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diff changeset
   388
#endif
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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diff changeset
   389
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   390
class CountRSSizeClosure: public HeapRegionClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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diff changeset
   391
  size_t _n;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
   392
  size_t _tot;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
   393
  size_t _max;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
   394
  HeapRegion* _max_r;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   395
  enum {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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   396
    N = 20,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
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diff changeset
   397
    MIN = 6
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
   398
  };
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
   399
  int _histo[N];
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
   400
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   401
  CountRSSizeClosure() : _n(0), _tot(0), _max(0), _max_r(NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   402
    for (int i = 0; i < N; i++) _histo[i] = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   403
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   404
  bool doHeapRegion(HeapRegion* r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   405
    if (!r->continuesHumongous()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   406
      size_t occ = r->rem_set()->occupied();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   407
      _n++;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   408
      _tot += occ;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   409
      if (occ > _max) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   410
        _max = occ;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   411
        _max_r = r;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   412
      }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   413
      // Fit it into a histo bin.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   414
      int s = 1 << MIN;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   415
      int i = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   416
      while (occ > (size_t) s && i < (N-1)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   417
        s = s << 1;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   418
        i++;
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
      _histo[i]++;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   421
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   422
    return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   423
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
   424
  size_t n() { return _n; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   425
  size_t tot() { return _tot; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   426
  size_t mx() { return _max; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   427
  HeapRegion* mxr() { return _max_r; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   428
  void print_histo() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   429
    int mx = N;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   430
    while (mx >= 0) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   431
      if (_histo[mx-1] > 0) break;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   432
      mx--;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   433
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   434
    gclog_or_tty->print_cr("Number of regions with given RS sizes:");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   435
    gclog_or_tty->print_cr("           <= %8d   %8d", 1 << MIN, _histo[0]);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   436
    for (int i = 1; i < mx-1; i++) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   437
      gclog_or_tty->print_cr("  %8d  - %8d   %8d",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   438
                    (1 << (MIN + i - 1)) + 1,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   439
                    1 << (MIN + i),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   440
                    _histo[i]);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   441
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   442
    gclog_or_tty->print_cr("            > %8d   %8d", (1 << (MIN+mx-2))+1, _histo[mx-1]);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   443
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   444
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   445
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   446
void
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   447
HRInto_G1RemSet::scanNewRefsRS(OopsInHeapRegionClosure* oc,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   448
                                             int worker_i) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   449
  double scan_new_refs_start_sec = os::elapsedTime();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   450
  G1CollectedHeap* g1h = G1CollectedHeap::heap();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   451
  CardTableModRefBS* ct_bs = (CardTableModRefBS*) (g1h->barrier_set());
2142
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   452
  for (int i = 0; i < _new_refs[worker_i]->length(); i++) {
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   453
    oop* p = _new_refs[worker_i]->at(i);
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   454
    oop obj = *p;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   455
    // *p was in the collection set when p was pushed on "_new_refs", but
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   456
    // another thread may have processed this location from an RS, so it
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   457
    // might not point into the CS any longer.  If so, it's obviously been
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   458
    // processed, and we don't need to do anything further.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   459
    if (g1h->obj_in_cs(obj)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   460
      HeapRegion* r = g1h->heap_region_containing(p);
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
      DEBUG_ONLY(HeapRegion* to = g1h->heap_region_containing(obj));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   463
      oc->set_region(r);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   464
      // If "p" has already been processed concurrently, this is
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   465
      // idempotent.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   466
      oc->do_oop(p);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   467
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   468
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   469
  _g1p->record_scan_new_refs_time(worker_i,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   470
                                  (os::elapsedTime() - scan_new_refs_start_sec)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   471
                                  * 1000.0);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   472
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   473
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   474
void HRInto_G1RemSet::set_par_traversal(bool b) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   475
  _par_traversal_in_progress = b;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   476
  HeapRegionRemSet::set_par_traversal(b);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   477
}
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
void HRInto_G1RemSet::cleanupHRRS() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   480
  HeapRegionRemSet::cleanup();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   481
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   482
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   483
void
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   484
HRInto_G1RemSet::oops_into_collection_set_do(OopsInHeapRegionClosure* oc,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   485
                                             int worker_i) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   486
#if CARD_REPEAT_HISTO
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   487
  ct_freq_update_histo_and_reset();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   488
#endif
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   489
  if (worker_i == 0) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   490
    _cg1r->clear_and_record_card_counts();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   491
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   492
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   493
  // Make this into a command-line flag...
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   494
  if (G1RSCountHisto && (ParallelGCThreads == 0 || worker_i == 0)) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   495
    CountRSSizeClosure count_cl;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   496
    _g1->heap_region_iterate(&count_cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   497
    gclog_or_tty->print_cr("Avg of %d RS counts is %f, max is %d, "
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   498
                  "max region is " PTR_FORMAT,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   499
                  count_cl.n(), (float)count_cl.tot()/(float)count_cl.n(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   500
                  count_cl.mx(), count_cl.mxr());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   501
    count_cl.print_histo();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   502
  }
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
  if (ParallelGCThreads > 0) {
2250
36d1eb1bb075 6816154: G1: introduce flags to enable/disable RSet updating and scanning
tonyp
parents: 2249
diff changeset
   505
    // The two flags below were introduced temporarily to serialize
36d1eb1bb075 6816154: G1: introduce flags to enable/disable RSet updating and scanning
tonyp
parents: 2249
diff changeset
   506
    // the updating and scanning of remembered sets. There are some
36d1eb1bb075 6816154: G1: introduce flags to enable/disable RSet updating and scanning
tonyp
parents: 2249
diff changeset
   507
    // race conditions when these two operations are done in parallel
36d1eb1bb075 6816154: G1: introduce flags to enable/disable RSet updating and scanning
tonyp
parents: 2249
diff changeset
   508
    // and they are causing failures. When we resolve said race
36d1eb1bb075 6816154: G1: introduce flags to enable/disable RSet updating and scanning
tonyp
parents: 2249
diff changeset
   509
    // conditions, we'll revert back to parallel remembered set
36d1eb1bb075 6816154: G1: introduce flags to enable/disable RSet updating and scanning
tonyp
parents: 2249
diff changeset
   510
    // updating and scanning. See CRs 6677707 and 6677708.
36d1eb1bb075 6816154: G1: introduce flags to enable/disable RSet updating and scanning
tonyp
parents: 2249
diff changeset
   511
    if (G1EnableParallelRSetUpdating || (worker_i == 0)) {
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   512
      updateRS(worker_i);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   513
      scanNewRefsRS(oc, worker_i);
2250
36d1eb1bb075 6816154: G1: introduce flags to enable/disable RSet updating and scanning
tonyp
parents: 2249
diff changeset
   514
    }
36d1eb1bb075 6816154: G1: introduce flags to enable/disable RSet updating and scanning
tonyp
parents: 2249
diff changeset
   515
    if (G1EnableParallelRSetScanning || (worker_i == 0)) {
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   516
      scanRS(oc, worker_i);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   517
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   518
  } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   519
    assert(worker_i == 0, "invariant");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   520
    updateRS(0);
2142
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   521
    scanNewRefsRS(oc, 0);
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   522
    scanRS(oc, 0);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   523
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   524
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   525
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   526
void HRInto_G1RemSet::
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   527
prepare_for_oops_into_collection_set_do() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   528
#if G1_REM_SET_LOGGING
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   529
  PrintRSClosure cl;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   530
  _g1->collection_set_iterate(&cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   531
#endif
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   532
  cleanupHRRS();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   533
  ConcurrentG1Refine* cg1r = _g1->concurrent_g1_refine();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   534
  _g1->set_refine_cte_cl_concurrency(false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   535
  DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   536
  dcqs.concatenate_logs();
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
  assert(!_par_traversal_in_progress, "Invariant between iterations.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   539
  if (ParallelGCThreads > 0) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   540
    set_par_traversal(true);
2142
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   541
    _seq_task->set_par_threads((int)n_workers());
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   542
    if (cg1r->do_traversal()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   543
      updateRS(0);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   544
      // Have to do this again after updaters
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   545
      cleanupHRRS();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   546
    }
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
  guarantee( _cards_scanned == NULL, "invariant" );
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   549
  _cards_scanned = NEW_C_HEAP_ARRAY(size_t, n_workers());
2009
4adf43957a1b 6484959: G1: introduce survivor spaces
apetrusenko
parents: 1374
diff changeset
   550
  for (uint i = 0; i < n_workers(); ++i) {
4adf43957a1b 6484959: G1: introduce survivor spaces
apetrusenko
parents: 1374
diff changeset
   551
    _cards_scanned[i] = 0;
4adf43957a1b 6484959: G1: introduce survivor spaces
apetrusenko
parents: 1374
diff changeset
   552
  }
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   553
  _total_cards_scanned = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   554
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   555
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   556
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   557
class cleanUpIteratorsClosure : public HeapRegionClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   558
  bool doHeapRegion(HeapRegion *r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   559
    HeapRegionRemSet* hrrs = r->rem_set();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   560
    hrrs->init_for_par_iteration();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   561
    return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   562
  }
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
2142
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   565
class UpdateRSetOopsIntoCSImmediate : public OopClosure {
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   566
  G1CollectedHeap* _g1;
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   567
public:
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   568
  UpdateRSetOopsIntoCSImmediate(G1CollectedHeap* g1) : _g1(g1) { }
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   569
  virtual void do_oop(narrowOop* p) {
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   570
    guarantee(false, "NYI");
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   571
  }
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   572
  virtual void do_oop(oop* p) {
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   573
    HeapRegion* to = _g1->heap_region_containing(*p);
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   574
    if (to->in_collection_set()) {
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   575
      if (to->rem_set()->add_reference(p, 0)) {
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   576
        _g1->schedule_popular_region_evac(to);
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   577
      }
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   578
    }
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   579
  }
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   580
};
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   581
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   582
class UpdateRSetOopsIntoCSDeferred : public OopClosure {
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   583
  G1CollectedHeap* _g1;
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   584
  CardTableModRefBS* _ct_bs;
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   585
  DirtyCardQueue* _dcq;
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   586
public:
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   587
  UpdateRSetOopsIntoCSDeferred(G1CollectedHeap* g1, DirtyCardQueue* dcq) :
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   588
    _g1(g1), _ct_bs((CardTableModRefBS*)_g1->barrier_set()), _dcq(dcq) { }
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   589
  virtual void do_oop(narrowOop* p) {
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   590
    guarantee(false, "NYI");
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   591
  }
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   592
  virtual void do_oop(oop* p) {
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   593
    oop obj = *p;
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   594
    if (_g1->obj_in_cs(obj)) {
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   595
      size_t card_index = _ct_bs->index_for(p);
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   596
      if (_ct_bs->mark_card_deferred(card_index)) {
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   597
        _dcq->enqueue((jbyte*)_ct_bs->byte_for_index(card_index));
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   598
      }
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   599
    }
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   600
  }
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   601
};
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   602
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   603
void HRInto_G1RemSet::new_refs_iterate(OopClosure* cl) {
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   604
  for (size_t i = 0; i < n_workers(); i++) {
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   605
    for (int j = 0; j < _new_refs[i]->length(); j++) {
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   606
      oop* p = _new_refs[i]->at(j);
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   607
      cl->do_oop(p);
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   608
    }
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   609
  }
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   610
}
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   611
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   612
void HRInto_G1RemSet::cleanup_after_oops_into_collection_set_do() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   613
  guarantee( _cards_scanned != NULL, "invariant" );
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   614
  _total_cards_scanned = 0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   615
  for (uint i = 0; i < n_workers(); ++i)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   616
    _total_cards_scanned += _cards_scanned[i];
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   617
  FREE_C_HEAP_ARRAY(size_t, _cards_scanned);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   618
  _cards_scanned = NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   619
  // Cleanup after copy
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   620
#if G1_REM_SET_LOGGING
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   621
  PrintRSClosure cl;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   622
  _g1->heap_region_iterate(&cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   623
#endif
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   624
  _g1->set_refine_cte_cl_concurrency(true);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   625
  cleanUpIteratorsClosure iterClosure;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   626
  _g1->collection_set_iterate(&iterClosure);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   627
  // Set all cards back to clean.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   628
  _g1->cleanUpCardTable();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   629
  if (ParallelGCThreads > 0) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   630
    ConcurrentG1Refine* cg1r = _g1->concurrent_g1_refine();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   631
    if (cg1r->do_traversal()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   632
      cg1r->cg1rThread()->set_do_traversal(false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   633
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   634
    set_par_traversal(false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   635
  }
2142
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   636
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   637
  if (_g1->evacuation_failed()) {
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   638
    // Restore remembered sets for the regions pointing into
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   639
    // the collection set.
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   640
    if (G1DeferredRSUpdate) {
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   641
      DirtyCardQueue dcq(&_g1->dirty_card_queue_set());
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   642
      UpdateRSetOopsIntoCSDeferred deferred_update(_g1, &dcq);
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   643
      new_refs_iterate(&deferred_update);
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   644
    } else {
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   645
      UpdateRSetOopsIntoCSImmediate immediate_update(_g1);
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   646
      new_refs_iterate(&immediate_update);
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   647
    }
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   648
  }
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   649
  for (uint i = 0; i < n_workers(); i++) {
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   650
    _new_refs[i]->clear();
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   651
  }
032f4652700c 6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents: 2009
diff changeset
   652
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   653
  assert(!_par_traversal_in_progress, "Invariant between iterations.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   654
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   655
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   656
class UpdateRSObjectClosure: public ObjectClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   657
  UpdateRSOopClosure* _update_rs_oop_cl;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   658
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   659
  UpdateRSObjectClosure(UpdateRSOopClosure* update_rs_oop_cl) :
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   660
    _update_rs_oop_cl(update_rs_oop_cl) {}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   661
  void do_object(oop obj) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   662
    obj->oop_iterate(_update_rs_oop_cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   663
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   664
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   665
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   666
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   667
class ScrubRSClosure: public HeapRegionClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   668
  G1CollectedHeap* _g1h;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   669
  BitMap* _region_bm;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   670
  BitMap* _card_bm;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   671
  CardTableModRefBS* _ctbs;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   672
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   673
  ScrubRSClosure(BitMap* region_bm, BitMap* card_bm) :
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   674
    _g1h(G1CollectedHeap::heap()),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   675
    _region_bm(region_bm), _card_bm(card_bm),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   676
    _ctbs(NULL)
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
    ModRefBarrierSet* bs = _g1h->mr_bs();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   679
    guarantee(bs->is_a(BarrierSet::CardTableModRef), "Precondition");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   680
    _ctbs = (CardTableModRefBS*)bs;
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
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   683
  bool doHeapRegion(HeapRegion* r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   684
    if (!r->continuesHumongous()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   685
      r->rem_set()->scrub(_ctbs, _region_bm, _card_bm);
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
    return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   688
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   689
};
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
void HRInto_G1RemSet::scrub(BitMap* region_bm, BitMap* card_bm) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   692
  ScrubRSClosure scrub_cl(region_bm, card_bm);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   693
  _g1->heap_region_iterate(&scrub_cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   694
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   695
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   696
void HRInto_G1RemSet::scrub_par(BitMap* region_bm, BitMap* card_bm,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   697
                                int worker_num, int claim_val) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   698
  ScrubRSClosure scrub_cl(region_bm, card_bm);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   699
  _g1->heap_region_par_iterate_chunked(&scrub_cl, worker_num, claim_val);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   700
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   701
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   702
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   703
class ConcRefineRegionClosure: public HeapRegionClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   704
  G1CollectedHeap* _g1h;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   705
  CardTableModRefBS* _ctbs;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   706
  ConcurrentGCThread* _cgc_thrd;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   707
  ConcurrentG1Refine* _cg1r;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   708
  unsigned _cards_processed;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   709
  UpdateRSOopClosure _update_rs_oop_cl;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   710
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   711
  ConcRefineRegionClosure(CardTableModRefBS* ctbs,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   712
                          ConcurrentG1Refine* cg1r,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   713
                          HRInto_G1RemSet* g1rs) :
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   714
    _ctbs(ctbs), _cg1r(cg1r), _cgc_thrd(cg1r->cg1rThread()),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   715
    _update_rs_oop_cl(g1rs), _cards_processed(0),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   716
    _g1h(G1CollectedHeap::heap())
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   717
  {}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   718
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   719
  bool doHeapRegion(HeapRegion* r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   720
    if (!r->in_collection_set() &&
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   721
        !r->continuesHumongous() &&
2249
fb8abed44792 6817419: G1: Enable extensive verification for humongous regions
iveresov
parents: 2152
diff changeset
   722
        !r->is_young()) {
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   723
      _update_rs_oop_cl.set_from(r);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   724
      UpdateRSObjectClosure update_rs_obj_cl(&_update_rs_oop_cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   725
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   726
      // For each run of dirty card in the region:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   727
      //   1) Clear the cards.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   728
      //   2) Process the range corresponding to the run, adding any
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   729
      //      necessary RS entries.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   730
      // 1 must precede 2, so that a concurrent modification redirties the
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   731
      // card.  If a processing attempt does not succeed, because it runs
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   732
      // into an unparseable region, we will do binary search to find the
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   733
      // beginning of the next parseable region.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   734
      HeapWord* startAddr = r->bottom();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   735
      HeapWord* endAddr = r->used_region().end();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   736
      HeapWord* lastAddr;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   737
      HeapWord* nextAddr;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   738
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   739
      for (nextAddr = lastAddr = startAddr;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   740
           nextAddr < endAddr;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   741
           nextAddr = lastAddr) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   742
        MemRegion dirtyRegion;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   743
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   744
        // Get and clear dirty region from card table
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   745
        MemRegion next_mr(nextAddr, endAddr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   746
        dirtyRegion =
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   747
          _ctbs->dirty_card_range_after_reset(
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   748
                           next_mr,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   749
                           true, CardTableModRefBS::clean_card_val());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   750
        assert(dirtyRegion.start() >= nextAddr,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   751
               "returned region inconsistent?");
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
        if (!dirtyRegion.is_empty()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   754
          HeapWord* stop_point =
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   755
            r->object_iterate_mem_careful(dirtyRegion,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   756
                                          &update_rs_obj_cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   757
          if (stop_point == NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   758
            lastAddr = dirtyRegion.end();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   759
            _cards_processed +=
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   760
              (int) (dirtyRegion.word_size() / CardTableModRefBS::card_size_in_words);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   761
          } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   762
            // We're going to skip one or more cards that we can't parse.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   763
            HeapWord* next_parseable_card =
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   764
              r->next_block_start_careful(stop_point);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   765
            // Round this up to a card boundary.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   766
            next_parseable_card =
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   767
              _ctbs->addr_for(_ctbs->byte_after_const(next_parseable_card));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   768
            // Now we invalidate the intervening cards so we'll see them
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   769
            // again.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   770
            MemRegion remaining_dirty =
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   771
              MemRegion(stop_point, dirtyRegion.end());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   772
            MemRegion skipped =
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   773
              MemRegion(stop_point, next_parseable_card);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   774
            _ctbs->invalidate(skipped.intersection(remaining_dirty));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   775
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   776
            // Now start up again where we can parse.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   777
            lastAddr = next_parseable_card;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   778
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   779
            // Count how many we did completely.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   780
            _cards_processed +=
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   781
              (stop_point - dirtyRegion.start()) /
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   782
              CardTableModRefBS::card_size_in_words;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   783
          }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   784
          // Allow interruption at regular intervals.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   785
          // (Might need to make them more regular, if we get big
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   786
          // dirty regions.)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   787
          if (_cgc_thrd != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   788
            if (_cgc_thrd->should_yield()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   789
              _cgc_thrd->yield();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   790
              switch (_cg1r->get_pya()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   791
              case PYA_continue:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   792
                // This may have changed: re-read.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   793
                endAddr = r->used_region().end();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   794
                continue;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   795
              case PYA_restart: case PYA_cancel:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   796
                return true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   797
              }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   798
            }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   799
          }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   800
        } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   801
          break;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   802
        }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   803
      }
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
    // A good yield opportunity.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   806
    if (_cgc_thrd != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   807
      if (_cgc_thrd->should_yield()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   808
        _cgc_thrd->yield();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   809
        switch (_cg1r->get_pya()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   810
        case PYA_restart: case PYA_cancel:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   811
          return true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   812
        default:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   813
          break;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   814
        }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   815
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
    return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   819
  }
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
  unsigned cards_processed() { return _cards_processed; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   822
};
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
void HRInto_G1RemSet::concurrentRefinementPass(ConcurrentG1Refine* cg1r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   826
  ConcRefineRegionClosure cr_cl(ct_bs(), cg1r, this);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   827
  _g1->heap_region_iterate(&cr_cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   828
  _conc_refine_traversals++;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   829
  _conc_refine_cards += cr_cl.cards_processed();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   830
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   831
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   832
static IntHistogram out_of_histo(50, 50);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   833
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   834
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   835
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   836
void HRInto_G1RemSet::concurrentRefineOneCard(jbyte* card_ptr, int worker_i) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   837
  // If the card is no longer dirty, nothing to do.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   838
  if (*card_ptr != CardTableModRefBS::dirty_card_val()) return;
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
  // Construct the region representing the card.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   841
  HeapWord* start = _ct_bs->addr_for(card_ptr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   842
  // And find the region containing it.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   843
  HeapRegion* r = _g1->heap_region_containing(start);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   844
  if (r == NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   845
    guarantee(_g1->is_in_permanent(start), "Or else where?");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   846
    return;  // Not in the G1 heap (might be in perm, for example.)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   847
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   848
  // Why do we have to check here whether a card is on a young region,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   849
  // given that we dirty young regions and, as a result, the
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   850
  // post-barrier is supposed to filter them out and never to enqueue
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   851
  // them? When we allocate a new region as the "allocation region" we
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   852
  // actually dirty its cards after we release the lock, since card
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   853
  // dirtying while holding the lock was a performance bottleneck. So,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   854
  // as a result, it is possible for other threads to actually
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   855
  // allocate objects in the region (after the acquire the lock)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   856
  // before all the cards on the region are dirtied. This is unlikely,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   857
  // and it doesn't happen often, but it can happen. So, the extra
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   858
  // check below filters out those cards.
2249
fb8abed44792 6817419: G1: Enable extensive verification for humongous regions
iveresov
parents: 2152
diff changeset
   859
  if (r->is_young()) {
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   860
    return;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   861
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   862
  // While we are processing RSet buffers during the collection, we
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   863
  // actually don't want to scan any cards on the collection set,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   864
  // since we don't want to update remebered sets with entries that
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   865
  // point into the collection set, given that live objects from the
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   866
  // collection set are about to move and such entries will be stale
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   867
  // very soon. This change also deals with a reliability issue which
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   868
  // involves scanning a card in the collection set and coming across
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   869
  // an array that was being chunked and looking malformed. Note,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   870
  // however, that if evacuation fails, we have to scan any objects
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   871
  // that were not moved and create any missing entries.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   872
  if (r->in_collection_set()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   873
    return;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   874
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   875
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   876
  // Should we defer it?
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   877
  if (_cg1r->use_cache()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   878
    card_ptr = _cg1r->cache_insert(card_ptr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   879
    // If it was not an eviction, nothing to do.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   880
    if (card_ptr == NULL) return;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   881
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   882
    // OK, we have to reset the card start, region, etc.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   883
    start = _ct_bs->addr_for(card_ptr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   884
    r = _g1->heap_region_containing(start);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   885
    if (r == NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   886
      guarantee(_g1->is_in_permanent(start), "Or else where?");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   887
      return;  // Not in the G1 heap (might be in perm, for example.)
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
    guarantee(!r->is_young(), "It was evicted in the current minor cycle.");
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
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   892
  HeapWord* end   = _ct_bs->addr_for(card_ptr + 1);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   893
  MemRegion dirtyRegion(start, end);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   894
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   895
#if CARD_REPEAT_HISTO
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   896
  init_ct_freq_table(_g1->g1_reserved_obj_bytes());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   897
  ct_freq_note_card(_ct_bs->index_for(start));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   898
#endif
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   899
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   900
  UpdateRSOopClosure update_rs_oop_cl(this, worker_i);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   901
  update_rs_oop_cl.set_from(r);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   902
  FilterOutOfRegionClosure filter_then_update_rs_oop_cl(r, &update_rs_oop_cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   903
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   904
  // Undirty the card.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   905
  *card_ptr = CardTableModRefBS::clean_card_val();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   906
  // We must complete this write before we do any of the reads below.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   907
  OrderAccess::storeload();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   908
  // And process it, being careful of unallocated portions of TLAB's.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   909
  HeapWord* stop_point =
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   910
    r->oops_on_card_seq_iterate_careful(dirtyRegion,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   911
                                        &filter_then_update_rs_oop_cl);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   912
  // If stop_point is non-null, then we encountered an unallocated region
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   913
  // (perhaps the unfilled portion of a TLAB.)  For now, we'll dirty the
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   914
  // card and re-enqueue: if we put off the card until a GC pause, then the
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   915
  // unallocated portion will be filled in.  Alternatively, we might try
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   916
  // the full complexity of the technique used in "regular" precleaning.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   917
  if (stop_point != NULL) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   918
    // The card might have gotten re-dirtied and re-enqueued while we
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   919
    // worked.  (In fact, it's pretty likely.)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   920
    if (*card_ptr != CardTableModRefBS::dirty_card_val()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   921
      *card_ptr = CardTableModRefBS::dirty_card_val();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   922
      MutexLockerEx x(Shared_DirtyCardQ_lock,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   923
                      Mutex::_no_safepoint_check_flag);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   924
      DirtyCardQueue* sdcq =
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   925
        JavaThread::dirty_card_queue_set().shared_dirty_card_queue();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   926
      sdcq->enqueue(card_ptr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   927
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   928
  } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   929
    out_of_histo.add_entry(filter_then_update_rs_oop_cl.out_of_region());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   930
    _conc_refine_cards++;
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
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   933
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   934
class HRRSStatsIter: public HeapRegionClosure {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   935
  size_t _occupied;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   936
  size_t _total_mem_sz;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   937
  size_t _max_mem_sz;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   938
  HeapRegion* _max_mem_sz_region;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   939
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   940
  HRRSStatsIter() :
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   941
    _occupied(0),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   942
    _total_mem_sz(0),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   943
    _max_mem_sz(0),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   944
    _max_mem_sz_region(NULL)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   945
  {}
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
  bool doHeapRegion(HeapRegion* r) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   948
    if (r->continuesHumongous()) return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   949
    size_t mem_sz = r->rem_set()->mem_size();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   950
    if (mem_sz > _max_mem_sz) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   951
      _max_mem_sz = mem_sz;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   952
      _max_mem_sz_region = r;
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
    _total_mem_sz += mem_sz;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   955
    size_t occ = r->rem_set()->occupied();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   956
    _occupied += occ;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   957
    return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   958
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   959
  size_t total_mem_sz() { return _total_mem_sz; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   960
  size_t max_mem_sz() { return _max_mem_sz; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   961
  size_t occupied() { return _occupied; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   962
  HeapRegion* max_mem_sz_region() { return _max_mem_sz_region; }
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
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   965
void HRInto_G1RemSet::print_summary_info() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   966
  G1CollectedHeap* g1 = G1CollectedHeap::heap();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   967
  ConcurrentG1RefineThread* cg1r_thrd =
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   968
    g1->concurrent_g1_refine()->cg1rThread();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   969
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   970
#if CARD_REPEAT_HISTO
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   971
  gclog_or_tty->print_cr("\nG1 card_repeat count histogram: ");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   972
  gclog_or_tty->print_cr("  # of repeats --> # of cards with that number.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   973
  card_repeat_count.print_on(gclog_or_tty);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   974
#endif
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   975
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   976
  if (FILTEROUTOFREGIONCLOSURE_DOHISTOGRAMCOUNT) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   977
    gclog_or_tty->print_cr("\nG1 rem-set out-of-region histogram: ");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   978
    gclog_or_tty->print_cr("  # of CS ptrs --> # of cards with that number.");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   979
    out_of_histo.print_on(gclog_or_tty);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   980
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   981
  gclog_or_tty->print_cr("\n Concurrent RS processed %d cards in "
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   982
                "%5.2fs.",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   983
                _conc_refine_cards, cg1r_thrd->vtime_accum());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   984
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   985
  DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   986
  jint tot_processed_buffers =
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   987
    dcqs.processed_buffers_mut() + dcqs.processed_buffers_rs_thread();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   988
  gclog_or_tty->print_cr("  Of %d completed buffers:", tot_processed_buffers);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   989
  gclog_or_tty->print_cr("     %8d (%5.1f%%) by conc RS thread.",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   990
                dcqs.processed_buffers_rs_thread(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   991
                100.0*(float)dcqs.processed_buffers_rs_thread()/
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   992
                (float)tot_processed_buffers);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   993
  gclog_or_tty->print_cr("     %8d (%5.1f%%) by mutator threads.",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   994
                dcqs.processed_buffers_mut(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   995
                100.0*(float)dcqs.processed_buffers_mut()/
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   996
                (float)tot_processed_buffers);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   997
  gclog_or_tty->print_cr("   Did %d concurrent refinement traversals.",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   998
                _conc_refine_traversals);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   999
  if (!G1RSBarrierUseQueue) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1000
    gclog_or_tty->print_cr("   Scanned %8.2f cards/traversal.",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1001
                  _conc_refine_traversals > 0 ?
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1002
                  (float)_conc_refine_cards/(float)_conc_refine_traversals :
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1003
                  0);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1004
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1005
  gclog_or_tty->print_cr("");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1006
  if (G1UseHRIntoRS) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1007
    HRRSStatsIter blk;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1008
    g1->heap_region_iterate(&blk);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1009
    gclog_or_tty->print_cr("  Total heap region rem set sizes = " SIZE_FORMAT "K."
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1010
                           "  Max = " SIZE_FORMAT "K.",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1011
                           blk.total_mem_sz()/K, blk.max_mem_sz()/K);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1012
    gclog_or_tty->print_cr("  Static structures = " SIZE_FORMAT "K,"
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1013
                           " free_lists = " SIZE_FORMAT "K.",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1014
                           HeapRegionRemSet::static_mem_size()/K,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1015
                           HeapRegionRemSet::fl_mem_size()/K);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1016
    gclog_or_tty->print_cr("    %d occupied cards represented.",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1017
                           blk.occupied());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1018
    gclog_or_tty->print_cr("    Max sz region = [" PTR_FORMAT ", " PTR_FORMAT " )"
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1019
                           " %s, cap = " SIZE_FORMAT "K, occ = " SIZE_FORMAT "K.",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1020
                           blk.max_mem_sz_region()->bottom(), blk.max_mem_sz_region()->end(),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1021
                           (blk.max_mem_sz_region()->popular() ? "POP" : ""),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1022
                           (blk.max_mem_sz_region()->rem_set()->mem_size() + K - 1)/K,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1023
                           (blk.max_mem_sz_region()->rem_set()->occupied() + K - 1)/K);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1024
    gclog_or_tty->print_cr("    Did %d coarsenings.",
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1025
                  HeapRegionRemSet::n_coarsenings());
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1026
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1027
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1028
}
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1029
void HRInto_G1RemSet::prepare_for_verify() {
2249
fb8abed44792 6817419: G1: Enable extensive verification for humongous regions
iveresov
parents: 2152
diff changeset
  1030
  if (G1HRRSFlushLogBuffersOnVerify &&
fb8abed44792 6817419: G1: Enable extensive verification for humongous regions
iveresov
parents: 2152
diff changeset
  1031
      (VerifyBeforeGC || VerifyAfterGC)
fb8abed44792 6817419: G1: Enable extensive verification for humongous regions
iveresov
parents: 2152
diff changeset
  1032
      &&  !_g1->full_collection()) {
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1033
    cleanupHRRS();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1034
    _g1->set_refine_cte_cl_concurrency(false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1035
    if (SafepointSynchronize::is_at_safepoint()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1036
      DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1037
      dcqs.concatenate_logs();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1038
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1039
    bool cg1r_use_cache = _cg1r->use_cache();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1040
    _cg1r->set_use_cache(false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1041
    updateRS(0);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1042
    _cg1r->set_use_cache(cg1r_use_cache);
2249
fb8abed44792 6817419: G1: Enable extensive verification for humongous regions
iveresov
parents: 2152
diff changeset
  1043
fb8abed44792 6817419: G1: Enable extensive verification for humongous regions
iveresov
parents: 2152
diff changeset
  1044
    assert(JavaThread::dirty_card_queue_set().completed_buffers_num() == 0, "All should be consumed");
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1045
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1046
}