hotspot/src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.hpp
author jmasa
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8031323: Optionally align objects copied to survivor spaces Reviewed-by: brutisso, tschatzl
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/*
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 * Copyright (c) 2005, 2013, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSPARALLELCOMPACT_HPP
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#define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSPARALLELCOMPACT_HPP
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#include "gc_implementation/parallelScavenge/objectStartArray.hpp"
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#include "gc_implementation/parallelScavenge/parMarkBitMap.hpp"
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#include "gc_implementation/parallelScavenge/psCompactionManager.hpp"
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#include "gc_implementation/shared/collectorCounters.hpp"
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#include "gc_implementation/shared/markSweep.hpp"
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#include "gc_implementation/shared/mutableSpace.hpp"
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#include "memory/sharedHeap.hpp"
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#include "oops/oop.hpp"
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class ParallelScavengeHeap;
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class PSAdaptiveSizePolicy;
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class PSYoungGen;
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class PSOldGen;
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class ParCompactionManager;
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class ParallelTaskTerminator;
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class PSParallelCompact;
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class GCTaskManager;
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class GCTaskQueue;
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class PreGCValues;
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class MoveAndUpdateClosure;
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class RefProcTaskExecutor;
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class ParallelOldTracer;
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class STWGCTimer;
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// The SplitInfo class holds the information needed to 'split' a source region
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// so that the live data can be copied to two destination *spaces*.  Normally,
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// all the live data in a region is copied to a single destination space (e.g.,
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// everything live in a region in eden is copied entirely into the old gen).
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// However, when the heap is nearly full, all the live data in eden may not fit
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// into the old gen.  Copying only some of the regions from eden to old gen
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// requires finding a region that does not contain a partial object (i.e., no
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// live object crosses the region boundary) somewhere near the last object that
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// does fit into the old gen.  Since it's not always possible to find such a
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// region, splitting is necessary for predictable behavior.
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//
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// A region is always split at the end of the partial object.  This avoids
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// additional tests when calculating the new location of a pointer, which is a
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// very hot code path.  The partial object and everything to its left will be
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// copied to another space (call it dest_space_1).  The live data to the right
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// of the partial object will be copied either within the space itself, or to a
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// different destination space (distinct from dest_space_1).
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//
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// Split points are identified during the summary phase, when region
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// destinations are computed:  data about the split, including the
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// partial_object_size, is recorded in a SplitInfo record and the
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// partial_object_size field in the summary data is set to zero.  The zeroing is
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// possible (and necessary) since the partial object will move to a different
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// destination space than anything to its right, thus the partial object should
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// not affect the locations of any objects to its right.
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//
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// The recorded data is used during the compaction phase, but only rarely:  when
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// the partial object on the split region will be copied across a destination
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// region boundary.  This test is made once each time a region is filled, and is
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// a simple address comparison, so the overhead is negligible (see
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// PSParallelCompact::first_src_addr()).
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//
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// Notes:
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//
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// Only regions with partial objects are split; a region without a partial
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// object does not need any extra bookkeeping.
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//
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// At most one region is split per space, so the amount of data required is
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// constant.
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//
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// A region is split only when the destination space would overflow.  Once that
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// happens, the destination space is abandoned and no other data (even from
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// other source spaces) is targeted to that destination space.  Abandoning the
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// destination space may leave a somewhat large unused area at the end, if a
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// large object caused the overflow.
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//
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// Future work:
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//
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// More bookkeeping would be required to continue to use the destination space.
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// The most general solution would allow data from regions in two different
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// source spaces to be "joined" in a single destination region.  At the very
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// least, additional code would be required in next_src_region() to detect the
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// join and skip to an out-of-order source region.  If the join region was also
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// the last destination region to which a split region was copied (the most
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// likely case), then additional work would be needed to get fill_region() to
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// stop iteration and switch to a new source region at the right point.  Basic
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// idea would be to use a fake value for the top of the source space.  It is
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// doable, if a bit tricky.
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//
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// A simpler (but less general) solution would fill the remainder of the
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// destination region with a dummy object and continue filling the next
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// destination region.
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class SplitInfo
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{
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public:
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  // Return true if this split info is valid (i.e., if a split has been
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  // recorded).  The very first region cannot have a partial object and thus is
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  // never split, so 0 is the 'invalid' value.
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  bool is_valid() const { return _src_region_idx > 0; }
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  // Return true if this split holds data for the specified source region.
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  inline bool is_split(size_t source_region) const;
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  // The index of the split region, the size of the partial object on that
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  // region and the destination of the partial object.
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  size_t    src_region_idx() const   { return _src_region_idx; }
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  size_t    partial_obj_size() const { return _partial_obj_size; }
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  HeapWord* destination() const      { return _destination; }
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  // The destination count of the partial object referenced by this split
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  // (either 1 or 2).  This must be added to the destination count of the
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  // remainder of the source region.
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  unsigned int destination_count() const { return _destination_count; }
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  // If a word within the partial object will be written to the first word of a
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  // destination region, this is the address of the destination region;
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  // otherwise this is NULL.
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  HeapWord* dest_region_addr() const     { return _dest_region_addr; }
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  // If a word within the partial object will be written to the first word of a
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  // destination region, this is the address of that word within the partial
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  // object; otherwise this is NULL.
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  HeapWord* first_src_addr() const       { return _first_src_addr; }
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  // Record the data necessary to split the region src_region_idx.
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  void record(size_t src_region_idx, size_t partial_obj_size,
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              HeapWord* destination);
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  void clear();
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  DEBUG_ONLY(void verify_clear();)
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private:
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  size_t       _src_region_idx;
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  size_t       _partial_obj_size;
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  HeapWord*    _destination;
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  unsigned int _destination_count;
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  HeapWord*    _dest_region_addr;
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  HeapWord*    _first_src_addr;
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};
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inline bool SplitInfo::is_split(size_t region_idx) const
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{
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  return _src_region_idx == region_idx && is_valid();
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}
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class SpaceInfo
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{
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 public:
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  MutableSpace* space() const { return _space; }
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  // Where the free space will start after the collection.  Valid only after the
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  // summary phase completes.
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  HeapWord* new_top() const { return _new_top; }
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  // Allows new_top to be set.
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  HeapWord** new_top_addr() { return &_new_top; }
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  // Where the smallest allowable dense prefix ends (used only for perm gen).
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  HeapWord* min_dense_prefix() const { return _min_dense_prefix; }
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  // Where the dense prefix ends, or the compacted region begins.
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  HeapWord* dense_prefix() const { return _dense_prefix; }
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  // The start array for the (generation containing the) space, or NULL if there
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  // is no start array.
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  ObjectStartArray* start_array() const { return _start_array; }
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  SplitInfo& split_info() { return _split_info; }
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  void set_space(MutableSpace* s)           { _space = s; }
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  void set_new_top(HeapWord* addr)          { _new_top = addr; }
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  void set_min_dense_prefix(HeapWord* addr) { _min_dense_prefix = addr; }
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  void set_dense_prefix(HeapWord* addr)     { _dense_prefix = addr; }
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  void set_start_array(ObjectStartArray* s) { _start_array = s; }
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  void publish_new_top() const              { _space->set_top(_new_top); }
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  MutableSpace*     _space;
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  HeapWord*         _new_top;
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  HeapWord*         _min_dense_prefix;
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  HeapWord*         _dense_prefix;
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  ObjectStartArray* _start_array;
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  SplitInfo         _split_info;
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};
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class ParallelCompactData
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{
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  // Sizes are in HeapWords, unless indicated otherwise.
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  static const size_t Log2RegionSize;
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  static const size_t RegionSize;
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  static const size_t RegionSizeBytes;
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  // Mask for the bits in a size_t to get an offset within a region.
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  static const size_t RegionSizeOffsetMask;
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  // Mask for the bits in a pointer to get an offset within a region.
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  static const size_t RegionAddrOffsetMask;
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  // Mask for the bits in a pointer to get the address of the start of a region.
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  static const size_t RegionAddrMask;
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  static const size_t Log2BlockSize;
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  static const size_t BlockSize;
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  static const size_t BlockSizeBytes;
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  static const size_t BlockSizeOffsetMask;
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  static const size_t BlockAddrOffsetMask;
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  static const size_t BlockAddrMask;
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  static const size_t BlocksPerRegion;
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  static const size_t Log2BlocksPerRegion;
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  class RegionData
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  {
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  public:
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    // Destination address of the region.
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    HeapWord* destination() const { return _destination; }
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    // The first region containing data destined for this region.
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    size_t source_region() const { return _source_region; }
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    // The object (if any) starting in this region and ending in a different
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    // region that could not be updated during the main (parallel) compaction
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    // phase.  This is different from _partial_obj_addr, which is an object that
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    // extends onto a source region.  However, the two uses do not overlap in
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    // time, so the same field is used to save space.
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    HeapWord* deferred_obj_addr() const { return _partial_obj_addr; }
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    // The starting address of the partial object extending onto the region.
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    HeapWord* partial_obj_addr() const { return _partial_obj_addr; }
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    // Size of the partial object extending onto the region (words).
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    size_t partial_obj_size() const { return _partial_obj_size; }
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    // Size of live data that lies within this region due to objects that start
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    // in this region (words).  This does not include the partial object
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    // extending onto the region (if any), or the part of an object that extends
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    // onto the next region (if any).
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    size_t live_obj_size() const { return _dc_and_los & los_mask; }
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    // Total live data that lies within the region (words).
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    size_t data_size() const { return partial_obj_size() + live_obj_size(); }
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    // The destination_count is the number of other regions to which data from
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    // this region will be copied.  At the end of the summary phase, the valid
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    // values of destination_count are
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    //
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    // 0 - data from the region will be compacted completely into itself, or the
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    //     region is empty.  The region can be claimed and then filled.
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    // 1 - data from the region will be compacted into 1 other region; some
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    //     data from the region may also be compacted into the region itself.
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    // 2 - data from the region will be copied to 2 other regions.
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    //
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    // During compaction as regions are emptied, the destination_count is
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    // decremented (atomically) and when it reaches 0, it can be claimed and
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    // then filled.
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    //
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    // A region is claimed for processing by atomically changing the
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    // destination_count to the claimed value (dc_claimed).  After a region has
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    // been filled, the destination_count should be set to the completed value
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    // (dc_completed).
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    inline uint destination_count() const;
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    inline uint destination_count_raw() const;
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    // Whether the block table for this region has been filled.
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    inline bool blocks_filled() const;
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    // Number of times the block table was filled.
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    DEBUG_ONLY(inline size_t blocks_filled_count() const;)
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    // The location of the java heap data that corresponds to this region.
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    inline HeapWord* data_location() const;
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    // The highest address referenced by objects in this region.
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    inline HeapWord* highest_ref() const;
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    // Whether this region is available to be claimed, has been claimed, or has
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    // been completed.
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    //
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    // Minor subtlety:  claimed() returns true if the region is marked
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    // completed(), which is desirable since a region must be claimed before it
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    // can be completed.
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    bool available() const { return _dc_and_los < dc_one; }
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    bool claimed() const   { return _dc_and_los >= dc_claimed; }
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    bool completed() const { return _dc_and_los >= dc_completed; }
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    // These are not atomic.
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    void set_destination(HeapWord* addr)       { _destination = addr; }
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    void set_source_region(size_t region)      { _source_region = region; }
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    void set_deferred_obj_addr(HeapWord* addr) { _partial_obj_addr = addr; }
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    void set_partial_obj_addr(HeapWord* addr)  { _partial_obj_addr = addr; }
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    void set_partial_obj_size(size_t words)    {
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      _partial_obj_size = (region_sz_t) words;
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    }
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    inline void set_blocks_filled();
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    inline void set_destination_count(uint count);
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    inline void set_live_obj_size(size_t words);
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    inline void set_data_location(HeapWord* addr);
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    inline void set_completed();
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    inline bool claim_unsafe();
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    // These are atomic.
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    inline void add_live_obj(size_t words);
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    inline void set_highest_ref(HeapWord* addr);
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    inline void decrement_destination_count();
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    inline bool claim();
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  private:
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    // The type used to represent object sizes within a region.
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    typedef uint region_sz_t;
1
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    // Constants for manipulating the _dc_and_los field, which holds both the
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    // destination count and live obj size.  The live obj size lives at the
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    // least significant end so no masking is necessary when adding.
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    static const region_sz_t dc_shift;           // Shift amount.
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    static const region_sz_t dc_mask;            // Mask for destination count.
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    static const region_sz_t dc_one;             // 1, shifted appropriately.
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    static const region_sz_t dc_claimed;         // Region has been claimed.
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    static const region_sz_t dc_completed;       // Region has been completed.
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    static const region_sz_t los_mask;           // Mask for live obj size.
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    HeapWord*            _destination;
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    size_t               _source_region;
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    HeapWord*            _partial_obj_addr;
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    region_sz_t          _partial_obj_size;
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    region_sz_t volatile _dc_and_los;
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    bool                 _blocks_filled;
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#ifdef ASSERT
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    size_t               _blocks_filled_count;   // Number of block table fills.
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    // These enable optimizations that are only partially implemented.  Use
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    // debug builds to prevent the code fragments from breaking.
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    HeapWord*            _data_location;
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    HeapWord*            _highest_ref;
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#endif  // #ifdef ASSERT
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#ifdef ASSERT
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   public:
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    uint                 _pushed;   // 0 until region is pushed onto a stack
1
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   private:
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#endif
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  };
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  // "Blocks" allow shorter sections of the bitmap to be searched.  Each Block
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  // holds an offset, which is the amount of live data in the Region to the left
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  // of the first live object that starts in the Block.
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   372
  class BlockData
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   373
  {
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   374
  public:
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   375
    typedef unsigned short int blk_ofs_t;
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   376
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   377
    blk_ofs_t offset() const    { return _offset; }
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   378
    void set_offset(size_t val) { _offset = (blk_ofs_t)val; }
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   379
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   380
  private:
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   381
    blk_ofs_t _offset;
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   382
  };
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   383
1
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   384
public:
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   385
  ParallelCompactData();
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   386
  bool initialize(MemRegion covered_region);
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   387
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   388
  size_t region_count() const { return _region_count; }
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   389
  size_t reserved_byte_size() const { return _reserved_byte_size; }
1
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   390
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   391
  // Convert region indices to/from RegionData pointers.
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   392
  inline RegionData* region(size_t region_idx) const;
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   393
  inline size_t     region(const RegionData* const region_ptr) const;
1
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   394
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   395
  size_t block_count() const { return _block_count; }
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   396
  inline BlockData* block(size_t block_idx) const;
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   397
  inline size_t     block(const BlockData* block_ptr) const;
1
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   398
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   399
  void add_obj(HeapWord* addr, size_t len);
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   400
  void add_obj(oop p, size_t len) { add_obj((HeapWord*)p, len); }
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   401
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   402
  // Fill in the regions covering [beg, end) so that no data moves; i.e., the
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   403
  // destination of region n is simply the start of region n.  The argument beg
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   404
  // must be region-aligned; end need not be.
1
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   405
  void summarize_dense_prefix(HeapWord* beg, HeapWord* end);
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   406
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   407
  HeapWord* summarize_split_space(size_t src_region, SplitInfo& split_info,
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   408
                                  HeapWord* destination, HeapWord* target_end,
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   409
                                  HeapWord** target_next);
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   410
  bool summarize(SplitInfo& split_info,
1
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   411
                 HeapWord* source_beg, HeapWord* source_end,
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   412
                 HeapWord** source_next,
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diff changeset
   413
                 HeapWord* target_beg, HeapWord* target_end,
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diff changeset
   414
                 HeapWord** target_next);
1
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   415
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   416
  void clear();
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   417
  void clear_range(size_t beg_region, size_t end_region);
1
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   418
  void clear_range(HeapWord* beg, HeapWord* end) {
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   419
    clear_range(addr_to_region_idx(beg), addr_to_region_idx(end));
1
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   420
  }
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   421
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   422
  // Return the number of words between addr and the start of the region
1
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   423
  // containing addr.
1407
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diff changeset
   424
  inline size_t     region_offset(const HeapWord* addr) const;
1
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   425
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   426
  // Convert addresses to/from a region index or region pointer.
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diff changeset
   427
  inline size_t     addr_to_region_idx(const HeapWord* addr) const;
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jcoomes
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diff changeset
   428
  inline RegionData* addr_to_region_ptr(const HeapWord* addr) const;
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
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diff changeset
   429
  inline HeapWord*  region_to_addr(size_t region) const;
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jcoomes
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diff changeset
   430
  inline HeapWord*  region_to_addr(size_t region, size_t offset) const;
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diff changeset
   431
  inline HeapWord*  region_to_addr(const RegionData* region) const;
1
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   432
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diff changeset
   433
  inline HeapWord*  region_align_down(HeapWord* addr) const;
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diff changeset
   434
  inline HeapWord*  region_align_up(HeapWord* addr) const;
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
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diff changeset
   435
  inline bool       is_region_aligned(HeapWord* addr) const;
1
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   436
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   437
  // Analogous to region_offset() for blocks.
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diff changeset
   438
  size_t     block_offset(const HeapWord* addr) const;
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diff changeset
   439
  size_t     addr_to_block_idx(const HeapWord* addr) const;
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diff changeset
   440
  size_t     addr_to_block_idx(const oop obj) const {
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diff changeset
   441
    return addr_to_block_idx((HeapWord*) obj);
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diff changeset
   442
  }
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diff changeset
   443
  inline BlockData* addr_to_block_ptr(const HeapWord* addr) const;
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diff changeset
   444
  inline HeapWord*  block_to_addr(size_t block) const;
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diff changeset
   445
  inline size_t     region_to_block_idx(size_t region) const;
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diff changeset
   446
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
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diff changeset
   447
  inline HeapWord*  block_align_down(HeapWord* addr) const;
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diff changeset
   448
  inline HeapWord*  block_align_up(HeapWord* addr) const;
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diff changeset
   449
  inline bool       is_block_aligned(HeapWord* addr) const;
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diff changeset
   450
1
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   451
  // Return the address one past the end of the partial object.
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diff changeset
   452
  HeapWord* partial_obj_end(size_t region_idx) const;
1
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parents:
diff changeset
   453
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diff changeset
   454
  // Return the location of the object after compaction.
1
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   455
  HeapWord* calc_new_pointer(HeapWord* addr);
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diff changeset
   456
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   457
  HeapWord* calc_new_pointer(oop p) {
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   458
    return calc_new_pointer((HeapWord*) p);
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   459
  }
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   460
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   461
#ifdef  ASSERT
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   462
  void verify_clear(const PSVirtualSpace* vspace);
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   463
  void verify_clear();
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   464
#endif  // #ifdef ASSERT
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   465
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   466
private:
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diff changeset
   467
  bool initialize_block_data();
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   468
  bool initialize_region_data(size_t region_size);
1
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parents:
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   469
  PSVirtualSpace* create_vspace(size_t count, size_t element_size);
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   470
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   471
private:
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   472
  HeapWord*       _region_start;
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parents:
diff changeset
   473
#ifdef  ASSERT
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diff changeset
   474
  HeapWord*       _region_end;
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diff changeset
   475
#endif  // #ifdef ASSERT
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diff changeset
   476
1407
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diff changeset
   477
  PSVirtualSpace* _region_vspace;
17627
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parents: 17625
diff changeset
   478
  size_t          _reserved_byte_size;
1407
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diff changeset
   479
  RegionData*     _region_data;
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   480
  size_t          _region_count;
17851
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   481
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   482
  PSVirtualSpace* _block_vspace;
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   483
  BlockData*      _block_data;
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   484
  size_t          _block_count;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   485
};
489c9b5090e2 Initial load
duke
parents:
diff changeset
   486
489c9b5090e2 Initial load
duke
parents:
diff changeset
   487
inline uint
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   488
ParallelCompactData::RegionData::destination_count_raw() const
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   489
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
   490
  return _dc_and_los & dc_mask;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   491
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   492
489c9b5090e2 Initial load
duke
parents:
diff changeset
   493
inline uint
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   494
ParallelCompactData::RegionData::destination_count() const
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   495
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
   496
  return destination_count_raw() >> dc_shift;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   497
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   498
17851
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   499
inline bool
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   500
ParallelCompactData::RegionData::blocks_filled() const
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   501
{
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   502
  return _blocks_filled;
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   503
}
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   504
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   505
#ifdef ASSERT
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   506
inline size_t
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   507
ParallelCompactData::RegionData::blocks_filled_count() const
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   508
{
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   509
  return _blocks_filled_count;
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   510
}
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   511
#endif // #ifdef ASSERT
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   512
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   513
inline void
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   514
ParallelCompactData::RegionData::set_blocks_filled()
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   515
{
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   516
  _blocks_filled = true;
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   517
  // Debug builds count the number of times the table was filled.
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   518
  DEBUG_ONLY(Atomic::inc_ptr(&_blocks_filled_count));
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   519
}
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   520
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   521
inline void
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   522
ParallelCompactData::RegionData::set_destination_count(uint count)
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   523
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
   524
  assert(count <= (dc_completed >> dc_shift), "count too large");
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   525
  const region_sz_t live_sz = (region_sz_t) live_obj_size();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   526
  _dc_and_los = (count << dc_shift) | live_sz;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   527
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   528
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   529
inline void ParallelCompactData::RegionData::set_live_obj_size(size_t words)
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   530
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
   531
  assert(words <= los_mask, "would overflow");
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   532
  _dc_and_los = destination_count_raw() | (region_sz_t)words;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   533
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   534
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   535
inline void ParallelCompactData::RegionData::decrement_destination_count()
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   536
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
   537
  assert(_dc_and_los < dc_claimed, "already claimed");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   538
  assert(_dc_and_los >= dc_one, "count would go negative");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   539
  Atomic::add((int)dc_mask, (volatile int*)&_dc_and_los);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   540
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   541
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   542
inline HeapWord* ParallelCompactData::RegionData::data_location() const
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   543
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
   544
  DEBUG_ONLY(return _data_location;)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   545
  NOT_DEBUG(return NULL;)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   546
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   547
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   548
inline HeapWord* ParallelCompactData::RegionData::highest_ref() const
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   549
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
   550
  DEBUG_ONLY(return _highest_ref;)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   551
  NOT_DEBUG(return NULL;)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   552
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   553
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   554
inline void ParallelCompactData::RegionData::set_data_location(HeapWord* addr)
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   555
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
   556
  DEBUG_ONLY(_data_location = addr;)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   557
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   558
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   559
inline void ParallelCompactData::RegionData::set_completed()
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   560
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
   561
  assert(claimed(), "must be claimed first");
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   562
  _dc_and_los = dc_completed | (region_sz_t) live_obj_size();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   563
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   564
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   565
// MT-unsafe claiming of a region.  Should only be used during single threaded
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   566
// execution.
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   567
inline bool ParallelCompactData::RegionData::claim_unsafe()
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   568
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
   569
  if (available()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   570
    _dc_and_los |= dc_claimed;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   571
    return true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   572
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   573
  return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   574
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   575
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   576
inline void ParallelCompactData::RegionData::add_live_obj(size_t words)
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   577
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
   578
  assert(words <= (size_t)los_mask - live_obj_size(), "overflow");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   579
  Atomic::add((int) words, (volatile int*) &_dc_and_los);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   580
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   581
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   582
inline void ParallelCompactData::RegionData::set_highest_ref(HeapWord* addr)
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   583
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
   584
#ifdef ASSERT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   585
  HeapWord* tmp = _highest_ref;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   586
  while (addr > tmp) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   587
    tmp = (HeapWord*)Atomic::cmpxchg_ptr(addr, &_highest_ref, tmp);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   588
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   589
#endif  // #ifdef ASSERT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   590
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   591
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   592
inline bool ParallelCompactData::RegionData::claim()
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   593
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
   594
  const int los = (int) live_obj_size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   595
  const int old = Atomic::cmpxchg(dc_claimed | los,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   596
                                  (volatile int*) &_dc_and_los, los);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   597
  return old == los;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   598
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   599
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   600
inline ParallelCompactData::RegionData*
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   601
ParallelCompactData::region(size_t region_idx) const
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   602
{
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   603
  assert(region_idx <= region_count(), "bad arg");
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   604
  return _region_data + region_idx;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   605
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   606
489c9b5090e2 Initial load
duke
parents:
diff changeset
   607
inline size_t
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   608
ParallelCompactData::region(const RegionData* const region_ptr) const
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   609
{
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   610
  assert(region_ptr >= _region_data, "bad arg");
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   611
  assert(region_ptr <= _region_data + region_count(), "bad arg");
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   612
  return pointer_delta(region_ptr, _region_data, sizeof(RegionData));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   613
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   614
17851
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   615
inline ParallelCompactData::BlockData*
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   616
ParallelCompactData::block(size_t n) const {
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   617
  assert(n < block_count(), "bad arg");
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   618
  return _block_data + n;
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   619
}
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   620
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   621
inline size_t
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   622
ParallelCompactData::region_offset(const HeapWord* addr) const
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   623
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
   624
  assert(addr >= _region_start, "bad addr");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   625
  assert(addr <= _region_end, "bad addr");
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   626
  return (size_t(addr) & RegionAddrOffsetMask) >> LogHeapWordSize;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   627
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   628
489c9b5090e2 Initial load
duke
parents:
diff changeset
   629
inline size_t
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   630
ParallelCompactData::addr_to_region_idx(const HeapWord* addr) const
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   631
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
   632
  assert(addr >= _region_start, "bad addr");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   633
  assert(addr <= _region_end, "bad addr");
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   634
  return pointer_delta(addr, _region_start) >> Log2RegionSize;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   635
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   636
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   637
inline ParallelCompactData::RegionData*
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   638
ParallelCompactData::addr_to_region_ptr(const HeapWord* addr) const
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   639
{
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   640
  return region(addr_to_region_idx(addr));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   641
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   642
489c9b5090e2 Initial load
duke
parents:
diff changeset
   643
inline HeapWord*
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   644
ParallelCompactData::region_to_addr(size_t region) const
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   645
{
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   646
  assert(region <= _region_count, "region out of range");
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   647
  return _region_start + (region << Log2RegionSize);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   648
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   649
489c9b5090e2 Initial load
duke
parents:
diff changeset
   650
inline HeapWord*
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   651
ParallelCompactData::region_to_addr(const RegionData* region) const
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   652
{
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   653
  return region_to_addr(pointer_delta(region, _region_data,
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   654
                                      sizeof(RegionData)));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   655
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   656
489c9b5090e2 Initial load
duke
parents:
diff changeset
   657
inline HeapWord*
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   658
ParallelCompactData::region_to_addr(size_t region, size_t offset) const
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   659
{
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   660
  assert(region <= _region_count, "region out of range");
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   661
  assert(offset < RegionSize, "offset too big");  // This may be too strict.
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   662
  return region_to_addr(region) + offset;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   663
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   664
489c9b5090e2 Initial load
duke
parents:
diff changeset
   665
inline HeapWord*
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   666
ParallelCompactData::region_align_down(HeapWord* addr) const
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   667
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
   668
  assert(addr >= _region_start, "bad addr");
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   669
  assert(addr < _region_end + RegionSize, "bad addr");
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   670
  return (HeapWord*)(size_t(addr) & RegionAddrMask);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   671
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   672
489c9b5090e2 Initial load
duke
parents:
diff changeset
   673
inline HeapWord*
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   674
ParallelCompactData::region_align_up(HeapWord* addr) const
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   675
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
   676
  assert(addr >= _region_start, "bad addr");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   677
  assert(addr <= _region_end, "bad addr");
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   678
  return region_align_down(addr + RegionSizeOffsetMask);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   679
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   680
489c9b5090e2 Initial load
duke
parents:
diff changeset
   681
inline bool
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   682
ParallelCompactData::is_region_aligned(HeapWord* addr) const
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   683
{
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   684
  return region_offset(addr) == 0;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   685
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   686
17851
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   687
inline size_t
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   688
ParallelCompactData::block_offset(const HeapWord* addr) const
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   689
{
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   690
  assert(addr >= _region_start, "bad addr");
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   691
  assert(addr <= _region_end, "bad addr");
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   692
  return (size_t(addr) & BlockAddrOffsetMask) >> LogHeapWordSize;
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   693
}
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   694
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   695
inline size_t
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   696
ParallelCompactData::addr_to_block_idx(const HeapWord* addr) const
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   697
{
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   698
  assert(addr >= _region_start, "bad addr");
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   699
  assert(addr <= _region_end, "bad addr");
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   700
  return pointer_delta(addr, _region_start) >> Log2BlockSize;
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   701
}
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   702
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   703
inline ParallelCompactData::BlockData*
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   704
ParallelCompactData::addr_to_block_ptr(const HeapWord* addr) const
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   705
{
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   706
  return block(addr_to_block_idx(addr));
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   707
}
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   708
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   709
inline HeapWord*
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   710
ParallelCompactData::block_to_addr(size_t block) const
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   711
{
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   712
  assert(block < _block_count, "block out of range");
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   713
  return _region_start + (block << Log2BlockSize);
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   714
}
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   715
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   716
inline size_t
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   717
ParallelCompactData::region_to_block_idx(size_t region) const
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   718
{
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   719
  return region << Log2BlocksPerRegion;
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   720
}
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   721
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   722
inline HeapWord*
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   723
ParallelCompactData::block_align_down(HeapWord* addr) const
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   724
{
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   725
  assert(addr >= _region_start, "bad addr");
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   726
  assert(addr < _region_end + RegionSize, "bad addr");
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   727
  return (HeapWord*)(size_t(addr) & BlockAddrMask);
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   728
}
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   729
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   730
inline HeapWord*
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   731
ParallelCompactData::block_align_up(HeapWord* addr) const
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   732
{
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   733
  assert(addr >= _region_start, "bad addr");
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   734
  assert(addr <= _region_end, "bad addr");
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   735
  return block_align_down(addr + BlockSizeOffsetMask);
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   736
}
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   737
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   738
inline bool
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   739
ParallelCompactData::is_block_aligned(HeapWord* addr) const
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   740
{
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   741
  return block_offset(addr) == 0;
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   742
}
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   743
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   744
// Abstract closure for use with ParMarkBitMap::iterate(), which will invoke the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   745
// do_addr() method.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   746
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   747
// The closure is initialized with the number of heap words to process
489c9b5090e2 Initial load
duke
parents:
diff changeset
   748
// (words_remaining()), and becomes 'full' when it reaches 0.  The do_addr()
489c9b5090e2 Initial load
duke
parents:
diff changeset
   749
// methods in subclasses should update the total as words are processed.  Since
489c9b5090e2 Initial load
duke
parents:
diff changeset
   750
// only one subclass actually uses this mechanism to terminate iteration, the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   751
// default initial value is > 0.  The implementation is here and not in the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   752
// single subclass that uses it to avoid making is_full() virtual, and thus
489c9b5090e2 Initial load
duke
parents:
diff changeset
   753
// adding a virtual call per live object.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   754
489c9b5090e2 Initial load
duke
parents:
diff changeset
   755
class ParMarkBitMapClosure: public StackObj {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   756
 public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   757
  typedef ParMarkBitMap::idx_t idx_t;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   758
  typedef ParMarkBitMap::IterationStatus IterationStatus;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   759
489c9b5090e2 Initial load
duke
parents:
diff changeset
   760
 public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   761
  inline ParMarkBitMapClosure(ParMarkBitMap* mbm, ParCompactionManager* cm,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   762
                              size_t words = max_uintx);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   763
489c9b5090e2 Initial load
duke
parents:
diff changeset
   764
  inline ParCompactionManager* compaction_manager() const;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   765
  inline ParMarkBitMap*        bitmap() const;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   766
  inline size_t                words_remaining() const;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   767
  inline bool                  is_full() const;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   768
  inline HeapWord*             source() const;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   769
489c9b5090e2 Initial load
duke
parents:
diff changeset
   770
  inline void                  set_source(HeapWord* addr);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   771
489c9b5090e2 Initial load
duke
parents:
diff changeset
   772
  virtual IterationStatus do_addr(HeapWord* addr, size_t words) = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   773
489c9b5090e2 Initial load
duke
parents:
diff changeset
   774
 protected:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   775
  inline void decrement_words_remaining(size_t words);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   776
489c9b5090e2 Initial load
duke
parents:
diff changeset
   777
 private:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   778
  ParMarkBitMap* const        _bitmap;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   779
  ParCompactionManager* const _compaction_manager;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   780
  DEBUG_ONLY(const size_t     _initial_words_remaining;) // Useful in debugger.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   781
  size_t                      _words_remaining; // Words left to copy.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   782
489c9b5090e2 Initial load
duke
parents:
diff changeset
   783
 protected:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   784
  HeapWord*                   _source;          // Next addr that would be read.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   785
};
489c9b5090e2 Initial load
duke
parents:
diff changeset
   786
489c9b5090e2 Initial load
duke
parents:
diff changeset
   787
inline
489c9b5090e2 Initial load
duke
parents:
diff changeset
   788
ParMarkBitMapClosure::ParMarkBitMapClosure(ParMarkBitMap* bitmap,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   789
                                           ParCompactionManager* cm,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   790
                                           size_t words):
489c9b5090e2 Initial load
duke
parents:
diff changeset
   791
  _bitmap(bitmap), _compaction_manager(cm)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   792
#ifdef  ASSERT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   793
  , _initial_words_remaining(words)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   794
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   795
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
   796
  _words_remaining = words;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   797
  _source = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   798
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   799
489c9b5090e2 Initial load
duke
parents:
diff changeset
   800
inline ParCompactionManager* ParMarkBitMapClosure::compaction_manager() const {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   801
  return _compaction_manager;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   802
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   803
489c9b5090e2 Initial load
duke
parents:
diff changeset
   804
inline ParMarkBitMap* ParMarkBitMapClosure::bitmap() const {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   805
  return _bitmap;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   806
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   807
489c9b5090e2 Initial load
duke
parents:
diff changeset
   808
inline size_t ParMarkBitMapClosure::words_remaining() const {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   809
  return _words_remaining;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   810
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   811
489c9b5090e2 Initial load
duke
parents:
diff changeset
   812
inline bool ParMarkBitMapClosure::is_full() const {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   813
  return words_remaining() == 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   814
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   815
489c9b5090e2 Initial load
duke
parents:
diff changeset
   816
inline HeapWord* ParMarkBitMapClosure::source() const {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   817
  return _source;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   818
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   819
489c9b5090e2 Initial load
duke
parents:
diff changeset
   820
inline void ParMarkBitMapClosure::set_source(HeapWord* addr) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   821
  _source = addr;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   822
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   823
489c9b5090e2 Initial load
duke
parents:
diff changeset
   824
inline void ParMarkBitMapClosure::decrement_words_remaining(size_t words) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   825
  assert(_words_remaining >= words, "processed too many words");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   826
  _words_remaining -= words;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   827
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   828
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   829
// The UseParallelOldGC collector is a stop-the-world garbage collector that
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   830
// does parts of the collection using parallel threads.  The collection includes
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   831
// the tenured generation and the young generation.  The permanent generation is
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   832
// collected at the same time as the other two generations but the permanent
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   833
// generation is collect by a single GC thread.  The permanent generation is
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   834
// collected serially because of the requirement that during the processing of a
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   835
// klass AAA, any objects reference by AAA must already have been processed.
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   836
// This requirement is enforced by a left (lower address) to right (higher
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   837
// address) sliding compaction.
971
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   838
//
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   839
// There are four phases of the collection.
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   840
//
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   841
//      - marking phase
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   842
//      - summary phase
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   843
//      - compacting phase
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   844
//      - clean up phase
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   845
//
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   846
// Roughly speaking these phases correspond, respectively, to
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   847
//      - mark all the live objects
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   848
//      - calculate the destination of each object at the end of the collection
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   849
//      - move the objects to their destination
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   850
//      - update some references and reinitialize some variables
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   851
//
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   852
// These three phases are invoked in PSParallelCompact::invoke_no_policy().  The
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   853
// marking phase is implemented in PSParallelCompact::marking_phase() and does a
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   854
// complete marking of the heap.  The summary phase is implemented in
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   855
// PSParallelCompact::summary_phase().  The move and update phase is implemented
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   856
// in PSParallelCompact::compact().
971
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   857
//
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   858
// A space that is being collected is divided into regions and with each region
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   859
// is associated an object of type ParallelCompactData.  Each region is of a
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   860
// fixed size and typically will contain more than 1 object and may have parts
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   861
// of objects at the front and back of the region.
971
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   862
//
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   863
// region            -----+---------------------+----------
971
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   864
// objects covered   [ AAA  )[ BBB )[ CCC   )[ DDD     )
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   865
//
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   866
// The marking phase does a complete marking of all live objects in the heap.
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   867
// The marking also compiles the size of the data for all live objects covered
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   868
// by the region.  This size includes the part of any live object spanning onto
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   869
// the region (part of AAA if it is live) from the front, all live objects
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   870
// contained in the region (BBB and/or CCC if they are live), and the part of
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   871
// any live objects covered by the region that extends off the region (part of
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   872
// DDD if it is live).  The marking phase uses multiple GC threads and marking
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   873
// is done in a bit array of type ParMarkBitMap.  The marking of the bit map is
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   874
// done atomically as is the accumulation of the size of the live objects
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   875
// covered by a region.
971
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   876
//
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   877
// The summary phase calculates the total live data to the left of each region
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   878
// XXX.  Based on that total and the bottom of the space, it can calculate the
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   879
// starting location of the live data in XXX.  The summary phase calculates for
22551
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 22221
diff changeset
   880
// each region XXX quantities such as
971
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   881
//
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   882
//      - the amount of live data at the beginning of a region from an object
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   883
//        entering the region.
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   884
//      - the location of the first live data on the region
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   885
//      - a count of the number of regions receiving live data from XXX.
971
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   886
//
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   887
// See ParallelCompactData for precise details.  The summary phase also
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   888
// calculates the dense prefix for the compaction.  The dense prefix is a
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   889
// portion at the beginning of the space that is not moved.  The objects in the
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   890
// dense prefix do need to have their object references updated.  See method
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   891
// summarize_dense_prefix().
971
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   892
//
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   893
// The summary phase is done using 1 GC thread.
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   894
//
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   895
// The compaction phase moves objects to their new location and updates all
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   896
// references in the object.
971
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   897
//
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   898
// A current exception is that objects that cross a region boundary are moved
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   899
// but do not have their references updated.  References are not updated because
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   900
// it cannot easily be determined if the klass pointer KKK for the object AAA
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   901
// has been updated.  KKK likely resides in a region to the left of the region
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   902
// containing AAA.  These AAA's have there references updated at the end in a
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   903
// clean up phase.  See the method PSParallelCompact::update_deferred_objects().
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   904
// An alternate strategy is being investigated for this deferral of updating.
971
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   905
//
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   906
// Compaction is done on a region basis.  A region that is ready to be filled is
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   907
// put on a ready list and GC threads take region off the list and fill them.  A
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   908
// region is ready to be filled if it empty of live objects.  Such a region may
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   909
// have been initially empty (only contained dead objects) or may have had all
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   910
// its live objects copied out already.  A region that compacts into itself is
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   911
// also ready for filling.  The ready list is initially filled with empty
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   912
// regions and regions compacting into themselves.  There is always at least 1
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   913
// region that can be put on the ready list.  The regions are atomically added
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   914
// and removed from the ready list.
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   915
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   916
class PSParallelCompact : AllStatic {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   917
 public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   918
  // Convenient access to type names.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   919
  typedef ParMarkBitMap::idx_t idx_t;
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   920
  typedef ParallelCompactData::RegionData RegionData;
17851
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
   921
  typedef ParallelCompactData::BlockData BlockData;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   922
489c9b5090e2 Initial load
duke
parents:
diff changeset
   923
  typedef enum {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
   924
    old_space_id, eden_space_id,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   925
    from_space_id, to_space_id, last_space_id
489c9b5090e2 Initial load
duke
parents:
diff changeset
   926
  } SpaceId;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   927
489c9b5090e2 Initial load
duke
parents:
diff changeset
   928
 public:
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   929
  // Inline closure decls
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   930
  //
489c9b5090e2 Initial load
duke
parents:
diff changeset
   931
  class IsAliveClosure: public BoolObjectClosure {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   932
   public:
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   933
    virtual bool do_object_b(oop p);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   934
  };
489c9b5090e2 Initial load
duke
parents:
diff changeset
   935
489c9b5090e2 Initial load
duke
parents:
diff changeset
   936
  class KeepAliveClosure: public OopClosure {
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   937
   private:
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   938
    ParCompactionManager* _compaction_manager;
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   939
   protected:
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   940
    template <class T> inline void do_oop_work(T* p);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   941
   public:
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   942
    KeepAliveClosure(ParCompactionManager* cm) : _compaction_manager(cm) { }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   943
    virtual void do_oop(oop* p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   944
    virtual void do_oop(narrowOop* p);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   945
  };
489c9b5090e2 Initial load
duke
parents:
diff changeset
   946
489c9b5090e2 Initial load
duke
parents:
diff changeset
   947
  class FollowStackClosure: public VoidClosure {
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   948
   private:
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   949
    ParCompactionManager* _compaction_manager;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   950
   public:
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   951
    FollowStackClosure(ParCompactionManager* cm) : _compaction_manager(cm) { }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   952
    virtual void do_void();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   953
  };
489c9b5090e2 Initial load
duke
parents:
diff changeset
   954
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
   955
  class AdjustPointerClosure: public OopClosure {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   956
   public:
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   957
    virtual void do_oop(oop* p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   958
    virtual void do_oop(narrowOop* p);
3908
24b55ad4c228 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 2105
diff changeset
   959
    // do not walk from thread stacks to the code cache on this phase
24b55ad4c228 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 2105
diff changeset
   960
    virtual void do_code_blob(CodeBlob* cb) const { }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   961
  };
489c9b5090e2 Initial load
duke
parents:
diff changeset
   962
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
   963
  class AdjustKlassClosure : public KlassClosure {
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
   964
   public:
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
   965
    void do_klass(Klass* klass);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
   966
  };
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
   967
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   968
  friend class KeepAliveClosure;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   969
  friend class FollowStackClosure;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   970
  friend class AdjustPointerClosure;
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
   971
  friend class AdjustKlassClosure;
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
   972
  friend class FollowKlassClosure;
13738
d67be49a5beb 7195833: NPG: Rename instanceClassLoaderKlass, instanceRefKlass and instanceMirrorKlass
coleenp
parents: 13728
diff changeset
   973
  friend class InstanceClassLoaderKlass;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   974
  friend class RefProcTaskProxy;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   975
489c9b5090e2 Initial load
duke
parents:
diff changeset
   976
 private:
18025
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17851
diff changeset
   977
  static STWGCTimer           _gc_timer;
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17851
diff changeset
   978
  static ParallelOldTracer    _gc_tracer;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   979
  static elapsedTimer         _accumulated_time;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   980
  static unsigned int         _total_invocations;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   981
  static unsigned int         _maximum_compaction_gc_num;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   982
  static jlong                _time_of_last_gc;   // ms
489c9b5090e2 Initial load
duke
parents:
diff changeset
   983
  static CollectorCounters*   _counters;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   984
  static ParMarkBitMap        _mark_bitmap;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   985
  static ParallelCompactData  _summary_data;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   986
  static IsAliveClosure       _is_alive_closure;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   987
  static SpaceInfo            _space_info[last_space_id];
489c9b5090e2 Initial load
duke
parents:
diff changeset
   988
  static bool                 _print_phases;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   989
  static AdjustPointerClosure _adjust_pointer_closure;
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
   990
  static AdjustKlassClosure   _adjust_klass_closure;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   991
489c9b5090e2 Initial load
duke
parents:
diff changeset
   992
  // Reference processing (used in ...follow_contents)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   993
  static ReferenceProcessor*  _ref_processor;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   994
489c9b5090e2 Initial load
duke
parents:
diff changeset
   995
  // Updated location of intArrayKlassObj.
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
   996
  static Klass* _updated_int_array_klass_obj;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   997
489c9b5090e2 Initial load
duke
parents:
diff changeset
   998
  // Values computed at initialization and used by dead_wood_limiter().
489c9b5090e2 Initial load
duke
parents:
diff changeset
   999
  static double _dwl_mean;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1000
  static double _dwl_std_dev;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1001
  static double _dwl_first_term;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1002
  static double _dwl_adjustment;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1003
#ifdef  ASSERT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1004
  static bool   _dwl_initialized;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1005
#endif  // #ifdef ASSERT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1006
25350
6423a57e5451 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents: 22551
diff changeset
  1007
6423a57e5451 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents: 22551
diff changeset
  1008
 public:
6423a57e5451 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents: 22551
diff changeset
  1009
  static ParallelOldTracer* gc_tracer() { return &_gc_tracer; }
6423a57e5451 8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents: 22551
diff changeset
  1010
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1011
 private:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1012
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1013
  static void initialize_space_info();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1014
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1015
  // Return true if details about individual phases should be printed.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1016
  static inline bool print_phases();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1017
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1018
  // Clear the marking bitmap and summary data that cover the specified space.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1019
  static void clear_data_covering_space(SpaceId id);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1020
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1021
  static void pre_compact(PreGCValues* pre_gc_values);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1022
  static void post_compact();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1023
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1024
  // Mark live objects
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1025
  static void marking_phase(ParCompactionManager* cm,
18025
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17851
diff changeset
  1026
                            bool maximum_heap_compaction,
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17851
diff changeset
  1027
                            ParallelOldTracer *gc_tracer);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1028
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1029
  template <class T>
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1030
  static inline void follow_root(ParCompactionManager* cm, T* p);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1031
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1032
  // Compute the dense prefix for the designated space.  This is an experimental
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1033
  // implementation currently not used in production.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1034
  static HeapWord* compute_dense_prefix_via_density(const SpaceId id,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1035
                                                    bool maximum_compaction);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1036
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1037
  // Methods used to compute the dense prefix.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1038
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1039
  // Compute the value of the normal distribution at x = density.  The mean and
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1040
  // standard deviation are values saved by initialize_dead_wood_limiter().
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1041
  static inline double normal_distribution(double density);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1042
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1043
  // Initialize the static vars used by dead_wood_limiter().
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1044
  static void initialize_dead_wood_limiter();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1045
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1046
  // Return the percentage of space that can be treated as "dead wood" (i.e.,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1047
  // not reclaimed).
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1048
  static double dead_wood_limiter(double density, size_t min_percent);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1049
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1050
  // Find the first (left-most) region in the range [beg, end) that has at least
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1051
  // dead_words of dead space to the left.  The argument beg must be the first
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1052
  // region in the space that is not completely live.
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1053
  static RegionData* dead_wood_limit_region(const RegionData* beg,
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1054
                                            const RegionData* end,
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1055
                                            size_t dead_words);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1056
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1057
  // Return a pointer to the first region in the range [beg, end) that is not
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1058
  // completely full.
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1059
  static RegionData* first_dead_space_region(const RegionData* beg,
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1060
                                             const RegionData* end);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1061
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1062
  // Return a value indicating the benefit or 'yield' if the compacted region
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1063
  // were to start (or equivalently if the dense prefix were to end) at the
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1064
  // candidate region.  Higher values are better.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1065
  //
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1066
  // The value is based on the amount of space reclaimed vs. the costs of (a)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1067
  // updating references in the dense prefix plus (b) copying objects and
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1068
  // updating references in the compacted region.
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1069
  static inline double reclaimed_ratio(const RegionData* const candidate,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1070
                                       HeapWord* const bottom,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1071
                                       HeapWord* const top,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1072
                                       HeapWord* const new_top);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1073
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1074
  // Compute the dense prefix for the designated space.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1075
  static HeapWord* compute_dense_prefix(const SpaceId id,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1076
                                        bool maximum_compaction);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1077
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1078
  // Return true if dead space crosses onto the specified Region; bit must be
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1079
  // the bit index corresponding to the first word of the Region.
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1080
  static inline bool dead_space_crosses_boundary(const RegionData* region,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1081
                                                 idx_t bit);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1082
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1083
  // Summary phase utility routine to fill dead space (if any) at the dense
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1084
  // prefix boundary.  Should only be called if the the dense prefix is
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1085
  // non-empty.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1086
  static void fill_dense_prefix_end(SpaceId id);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1087
1669
c921639400dd 6765745: par compact - allow young gen spaces to be split
jcoomes
parents: 1668
diff changeset
  1088
  // Clear the summary data source_region field for the specified addresses.
c921639400dd 6765745: par compact - allow young gen spaces to be split
jcoomes
parents: 1668
diff changeset
  1089
  static void clear_source_region(HeapWord* beg_addr, HeapWord* end_addr);
c921639400dd 6765745: par compact - allow young gen spaces to be split
jcoomes
parents: 1668
diff changeset
  1090
1670
0deb85ea62d5 6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents: 1669
diff changeset
  1091
#ifndef PRODUCT
0deb85ea62d5 6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents: 1669
diff changeset
  1092
  // Routines to provoke splitting a young gen space (ParallelOldGCSplitALot).
0deb85ea62d5 6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents: 1669
diff changeset
  1093
0deb85ea62d5 6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents: 1669
diff changeset
  1094
  // Fill the region [start, start + words) with live object(s).  Only usable
0deb85ea62d5 6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents: 1669
diff changeset
  1095
  // for the old and permanent generations.
0deb85ea62d5 6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents: 1669
diff changeset
  1096
  static void fill_with_live_objects(SpaceId id, HeapWord* const start,
0deb85ea62d5 6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents: 1669
diff changeset
  1097
                                     size_t words);
0deb85ea62d5 6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents: 1669
diff changeset
  1098
  // Include the new objects in the summary data.
0deb85ea62d5 6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents: 1669
diff changeset
  1099
  static void summarize_new_objects(SpaceId id, HeapWord* start);
0deb85ea62d5 6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents: 1669
diff changeset
  1100
1683
56dd12dd6cb3 6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents: 1682
diff changeset
  1101
  // Add live objects to a survivor space since it's rare that both survivors
56dd12dd6cb3 6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents: 1682
diff changeset
  1102
  // are non-empty.
56dd12dd6cb3 6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents: 1682
diff changeset
  1103
  static void provoke_split_fill_survivor(SpaceId id);
56dd12dd6cb3 6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents: 1682
diff changeset
  1104
1670
0deb85ea62d5 6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents: 1669
diff changeset
  1105
  // Add live objects and/or choose the dense prefix to provoke splitting.
0deb85ea62d5 6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents: 1669
diff changeset
  1106
  static void provoke_split(bool & maximum_compaction);
0deb85ea62d5 6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents: 1669
diff changeset
  1107
#endif
0deb85ea62d5 6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents: 1669
diff changeset
  1108
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1109
  static void summarize_spaces_quick();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1110
  static void summarize_space(SpaceId id, bool maximum_compaction);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1111
  static void summary_phase(ParCompactionManager* cm, bool maximum_compaction);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1112
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1113
  // Adjust addresses in roots.  Does not adjust addresses in heap.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1114
  static void adjust_roots();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1115
17851
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
  1116
  DEBUG_ONLY(static void write_block_fill_histogram(outputStream* const out);)
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
  1117
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1118
  // Move objects to new locations.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1119
  static void compact_perm(ParCompactionManager* cm);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1120
  static void compact();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1121
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1122
  // Add available regions to the stack and draining tasks to the task queue.
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1123
  static void enqueue_region_draining_tasks(GCTaskQueue* q,
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1124
                                            uint parallel_gc_threads);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1125
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1126
  // Add dense prefix update tasks to the task queue.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1127
  static void enqueue_dense_prefix_tasks(GCTaskQueue* q,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1128
                                         uint parallel_gc_threads);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1129
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1130
  // Add region stealing tasks to the task queue.
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1131
  static void enqueue_region_stealing_tasks(
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1132
                                       GCTaskQueue* q,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1133
                                       ParallelTaskTerminator* terminator_ptr,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1134
                                       uint parallel_gc_threads);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1135
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1136
  // If objects are left in eden after a collection, try to move the boundary
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1137
  // and absorb them into the old gen.  Returns true if eden was emptied.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1138
  static bool absorb_live_data_from_eden(PSAdaptiveSizePolicy* size_policy,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1139
                                         PSYoungGen* young_gen,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1140
                                         PSOldGen* old_gen);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1141
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1142
  // Reset time since last full gc
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1143
  static void reset_millis_since_last_gc();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1144
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1145
 public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1146
  class MarkAndPushClosure: public OopClosure {
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1147
   private:
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1148
    ParCompactionManager* _compaction_manager;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1149
   public:
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1150
    MarkAndPushClosure(ParCompactionManager* cm) : _compaction_manager(cm) { }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1151
    virtual void do_oop(oop* p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1152
    virtual void do_oop(narrowOop* p);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1153
  };
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1154
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
  1155
  // The one and only place to start following the classes.
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
  1156
  // Should only be applied to the ClassLoaderData klasses list.
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
  1157
  class FollowKlassClosure : public KlassClosure {
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
  1158
   private:
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
  1159
    MarkAndPushClosure* _mark_and_push_closure;
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
  1160
   public:
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
  1161
    FollowKlassClosure(MarkAndPushClosure* mark_and_push_closure) :
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
  1162
        _mark_and_push_closure(mark_and_push_closure) { }
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
  1163
    void do_klass(Klass* klass);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
  1164
  };
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
  1165
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1166
  PSParallelCompact();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1167
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1168
  // Convenient accessor for Universe::heap().
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1169
  static ParallelScavengeHeap* gc_heap() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1170
    return (ParallelScavengeHeap*)Universe::heap();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1171
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1172
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1173
  static void invoke(bool maximum_heap_compaction);
11757
cdf6204b114a 7146343: PS invoke methods should indicate the type of gc done
jcoomes
parents: 11178
diff changeset
  1174
  static bool invoke_no_policy(bool maximum_heap_compaction);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1175
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1176
  static void post_initialize();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1177
  // Perform initialization for PSParallelCompact that requires
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1178
  // allocations.  This should be called during the VM initialization
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1179
  // at a pointer where it would be appropriate to return a JNI_ENOMEM
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1180
  // in the event of a failure.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1181
  static bool initialize();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1182
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
  1183
  // Closure accessors
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
  1184
  static OopClosure* adjust_pointer_closure()      { return (OopClosure*)&_adjust_pointer_closure; }
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
  1185
  static KlassClosure* adjust_klass_closure()      { return (KlassClosure*)&_adjust_klass_closure; }
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
  1186
  static BoolObjectClosure* is_alive_closure()     { return (BoolObjectClosure*)&_is_alive_closure; }
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
  1187
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1188
  // Public accessors
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1189
  static elapsedTimer* accumulated_time() { return &_accumulated_time; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1190
  static unsigned int total_invocations() { return _total_invocations; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1191
  static CollectorCounters* counters()    { return _counters; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1192
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1193
  // Used to add tasks
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1194
  static GCTaskManager* const gc_task_manager();
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
  1195
  static Klass* updated_int_array_klass_obj() {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1196
    return _updated_int_array_klass_obj;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1197
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1198
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1199
  // Marking support
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1200
  static inline bool mark_obj(oop obj);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
  1201
  static inline bool is_marked(oop obj);
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1202
  // Check mark and maybe push on marking stack
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1203
  template <class T> static inline void mark_and_push(ParCompactionManager* cm,
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1204
                                                      T* p);
17105
25b392a7740d 8012687: Remove unused is_root checks and closures
stefank
parents: 16685
diff changeset
  1205
  template <class T> static inline void adjust_pointer(T* p);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1206
22221
444e4457cfc7 8028993: Full collections with ParallelScavenge slower in JDK 8 compared to 7u40
sjohanss
parents: 18025
diff changeset
  1207
  static inline void follow_klass(ParCompactionManager* cm, Klass* klass);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
  1208
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
  1209
  static void follow_class_loader(ParCompactionManager* cm,
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
  1210
                                  ClassLoaderData* klass);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
  1211
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1212
  // Compaction support.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1213
  // Return true if p is in the range [beg_addr, end_addr).
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1214
  static inline bool is_in(HeapWord* p, HeapWord* beg_addr, HeapWord* end_addr);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1215
  static inline bool is_in(oop* p, HeapWord* beg_addr, HeapWord* end_addr);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1216
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1217
  // Convenience wrappers for per-space data kept in _space_info.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1218
  static inline MutableSpace*     space(SpaceId space_id);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1219
  static inline HeapWord*         new_top(SpaceId space_id);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1220
  static inline HeapWord*         dense_prefix(SpaceId space_id);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1221
  static inline ObjectStartArray* start_array(SpaceId space_id);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1222
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1223
  // Move and update the live objects in the specified space.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1224
  static void move_and_update(ParCompactionManager* cm, SpaceId space_id);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1225
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1226
  // Process the end of the given region range in the dense prefix.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1227
  // This includes saving any object not updated.
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1228
  static void dense_prefix_regions_epilogue(ParCompactionManager* cm,
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1229
                                            size_t region_start_index,
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1230
                                            size_t region_end_index,
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1231
                                            idx_t exiting_object_offset,
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1232
                                            idx_t region_offset_start,
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1233
                                            idx_t region_offset_end);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1234
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1235
  // Update a region in the dense prefix.  For each live object
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1236
  // in the region, update it's interior references.  For each
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1237
  // dead object, fill it with deadwood. Dead space at the end
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1238
  // of a region range will be filled to the start of the next
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1239
  // live object regardless of the region_index_end.  None of the
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1240
  // objects in the dense prefix move and dead space is dead
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1241
  // (holds only dead objects that don't need any processing), so
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1242
  // dead space can be filled in any order.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1243
  static void update_and_deadwood_in_dense_prefix(ParCompactionManager* cm,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1244
                                                  SpaceId space_id,
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1245
                                                  size_t region_index_start,
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1246
                                                  size_t region_index_end);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1247
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1248
  // Return the address of the count + 1st live word in the range [beg, end).
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1249
  static HeapWord* skip_live_words(HeapWord* beg, HeapWord* end, size_t count);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1250
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1251
  // Return the address of the word to be copied to dest_addr, which must be
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1252
  // aligned to a region boundary.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1253
  static HeapWord* first_src_addr(HeapWord* const dest_addr,
1669
c921639400dd 6765745: par compact - allow young gen spaces to be split
jcoomes
parents: 1668
diff changeset
  1254
                                  SpaceId src_space_id,
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1255
                                  size_t src_region_idx);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1256
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1257
  // Determine the next source region, set closure.source() to the start of the
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1258
  // new region return the region index.  Parameter end_addr is the address one
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1259
  // beyond the end of source range just processed.  If necessary, switch to a
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1260
  // new source space and set src_space_id (in-out parameter) and src_space_top
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1261
  // (out parameter) accordingly.
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1262
  static size_t next_src_region(MoveAndUpdateClosure& closure,
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1263
                                SpaceId& src_space_id,
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1264
                                HeapWord*& src_space_top,
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1265
                                HeapWord* end_addr);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1266
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1267
  // Decrement the destination count for each non-empty source region in the
1682
94ad5692b3a7 6784849: par compact - can fail when to_space is non-empty
jcoomes
parents: 1670
diff changeset
  1268
  // range [beg_region, region(region_align_up(end_addr))).  If the destination
94ad5692b3a7 6784849: par compact - can fail when to_space is non-empty
jcoomes
parents: 1670
diff changeset
  1269
  // count for a region goes to 0 and it needs to be filled, enqueue it.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1270
  static void decrement_destination_counts(ParCompactionManager* cm,
1682
94ad5692b3a7 6784849: par compact - can fail when to_space is non-empty
jcoomes
parents: 1670
diff changeset
  1271
                                           SpaceId src_space_id,
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1272
                                           size_t beg_region,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1273
                                           HeapWord* end_addr);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1274
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1275
  // Fill a region, copying objects from one or more source regions.
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1276
  static void fill_region(ParCompactionManager* cm, size_t region_idx);
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1277
  static void fill_and_update_region(ParCompactionManager* cm, size_t region) {
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1278
    fill_region(cm, region);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1279
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1280
17851
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
  1281
  // Fill in the block table for the specified region.
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
  1282
  static void fill_blocks(size_t region_idx);
04e698940f8a 6725714: par compact - add a table to speed up bitmap searches
jcoomes
parents: 17627
diff changeset
  1283
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1284
  // Update the deferred objects in the space.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1285
  static void update_deferred_objects(ParCompactionManager* cm, SpaceId id);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1286
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1287
  static ParMarkBitMap* mark_bitmap() { return &_mark_bitmap; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1288
  static ParallelCompactData& summary_data() { return _summary_data; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1289
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1290
  // Reference Processing
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1291
  static ReferenceProcessor* const ref_processor() { return _ref_processor; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1292
18025
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17851
diff changeset
  1293
  static STWGCTimer* gc_timer() { return &_gc_timer; }
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17851
diff changeset
  1294
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1295
  // Return the SpaceId for the given address.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1296
  static SpaceId space_id(HeapWord* addr);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1297
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1298
  // Time since last full gc (in milliseconds).
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1299
  static jlong millis_since_last_gc();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1300
16685
41c34debcde0 8011872: Include Bit Map addresses in the hs_err files
stefank
parents: 15088
diff changeset
  1301
  static void print_on_error(outputStream* st);
41c34debcde0 8011872: Include Bit Map addresses in the hs_err files
stefank
parents: 15088
diff changeset
  1302
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1303
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1304
  // Debugging support.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1305
  static const char* space_names[last_space_id];
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1306
  static void print_region_ranges();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1307
  static void print_dense_prefix_stats(const char* const algorithm,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1308
                                       const SpaceId id,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1309
                                       const bool maximum_compaction,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1310
                                       HeapWord* const addr);
1669
c921639400dd 6765745: par compact - allow young gen spaces to be split
jcoomes
parents: 1668
diff changeset
  1311
  static void summary_phase_msg(SpaceId dst_space_id,
c921639400dd 6765745: par compact - allow young gen spaces to be split
jcoomes
parents: 1668
diff changeset
  1312
                                HeapWord* dst_beg, HeapWord* dst_end,
c921639400dd 6765745: par compact - allow young gen spaces to be split
jcoomes
parents: 1668
diff changeset
  1313
                                SpaceId src_space_id,
c921639400dd 6765745: par compact - allow young gen spaces to be split
jcoomes
parents: 1668
diff changeset
  1314
                                HeapWord* src_beg, HeapWord* src_end);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1315
#endif  // #ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1316
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1317
#ifdef  ASSERT
1682
94ad5692b3a7 6784849: par compact - can fail when to_space is non-empty
jcoomes
parents: 1670
diff changeset
  1318
  // Sanity check the new location of a word in the heap.
94ad5692b3a7 6784849: par compact - can fail when to_space is non-empty
jcoomes
parents: 1670
diff changeset
  1319
  static inline void check_new_location(HeapWord* old_addr, HeapWord* new_addr);
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1320
  // Verify that all the regions have been emptied.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1321
  static void verify_complete(SpaceId space_id);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1322
#endif  // #ifdef ASSERT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1323
};
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1324
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1325
inline bool PSParallelCompact::mark_obj(oop obj) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1326
  const int obj_size = obj->size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1327
  if (mark_bitmap()->mark_obj(obj, obj_size)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1328
    _summary_data.add_obj(obj, obj_size);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1329
    return true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1330
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1331
    return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1332
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1333
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1334
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
  1335
inline bool PSParallelCompact::is_marked(oop obj) {
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
  1336
  return mark_bitmap()->is_marked(obj);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
  1337
}
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
  1338
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1339
template <class T>
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1340
inline void PSParallelCompact::follow_root(ParCompactionManager* cm, T* p) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1341
  assert(!Universe::heap()->is_in_reserved(p),
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1342
         "roots shouldn't be things within the heap");
15088
8875e774f1a3 8004132: SerialGC: ValidateMarkSweep broken when running GCOld
johnc
parents: 13738
diff changeset
  1343
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1344
  T heap_oop = oopDesc::load_heap_oop(p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1345
  if (!oopDesc::is_null(heap_oop)) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1346
    oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1347
    if (mark_bitmap()->is_unmarked(obj)) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1348
      if (mark_obj(obj)) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1349
        obj->follow_contents(cm);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1350
      }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1351
    }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1352
  }
5076
8b74a4b60b31 4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents: 3912
diff changeset
  1353
  cm->follow_marking_stacks();
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1354
}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1355
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1356
template <class T>
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1357
inline void PSParallelCompact::mark_and_push(ParCompactionManager* cm, T* p) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1358
  T heap_oop = oopDesc::load_heap_oop(p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1359
  if (!oopDesc::is_null(heap_oop)) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1360
    oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
5918
73b96456819a 6957084: simplify TaskQueue overflow handling
jcoomes
parents: 5702
diff changeset
  1361
    if (mark_bitmap()->is_unmarked(obj) && mark_obj(obj)) {
73b96456819a 6957084: simplify TaskQueue overflow handling
jcoomes
parents: 5702
diff changeset
  1362
      cm->push(obj);
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1363
    }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1364
  }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1365
}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1366
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1367
template <class T>
17105
25b392a7740d 8012687: Remove unused is_root checks and closures
stefank
parents: 16685
diff changeset
  1368
inline void PSParallelCompact::adjust_pointer(T* p) {
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1369
  T heap_oop = oopDesc::load_heap_oop(p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1370
  if (!oopDesc::is_null(heap_oop)) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1371
    oop obj     = oopDesc::decode_heap_oop_not_null(heap_oop);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1372
    oop new_obj = (oop)summary_data().calc_new_pointer(obj);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
  1373
    assert(new_obj != NULL,                    // is forwarding ptr?
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1374
           "should be forwarded");
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1375
    // Just always do the update unconditionally?
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1376
    if (new_obj != NULL) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1377
      assert(Universe::heap()->is_in_reserved(new_obj),
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1378
             "should be in object space");
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1379
      oopDesc::encode_store_heap_oop_not_null(p, new_obj);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1380
    }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1381
  }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1382
}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1383
22221
444e4457cfc7 8028993: Full collections with ParallelScavenge slower in JDK 8 compared to 7u40
sjohanss
parents: 18025
diff changeset
  1384
inline void PSParallelCompact::follow_klass(ParCompactionManager* cm, Klass* klass) {
444e4457cfc7 8028993: Full collections with ParallelScavenge slower in JDK 8 compared to 7u40
sjohanss
parents: 18025
diff changeset
  1385
  oop holder = klass->klass_holder();
444e4457cfc7 8028993: Full collections with ParallelScavenge slower in JDK 8 compared to 7u40
sjohanss
parents: 18025
diff changeset
  1386
  PSParallelCompact::mark_and_push(cm, &holder);
444e4457cfc7 8028993: Full collections with ParallelScavenge slower in JDK 8 compared to 7u40
sjohanss
parents: 18025
diff changeset
  1387
}
444e4457cfc7 8028993: Full collections with ParallelScavenge slower in JDK 8 compared to 7u40
sjohanss
parents: 18025
diff changeset
  1388
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1389
template <class T>
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1390
inline void PSParallelCompact::KeepAliveClosure::do_oop_work(T* p) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1391
  mark_and_push(_compaction_manager, p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1392
}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1393
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1394
inline bool PSParallelCompact::print_phases() {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1395
  return _print_phases;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1396
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1397
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1398
inline double PSParallelCompact::normal_distribution(double density) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1399
  assert(_dwl_initialized, "uninitialized");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1400
  const double squared_term = (density - _dwl_mean) / _dwl_std_dev;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1401
  return _dwl_first_term * exp(-0.5 * squared_term * squared_term);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1402
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1403
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1404
inline bool
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1405
PSParallelCompact::dead_space_crosses_boundary(const RegionData* region,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1406
                                               idx_t bit)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1407
{
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1408
  assert(bit > 0, "cannot call this for the first bit/region");
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1409
  assert(_summary_data.region_to_addr(region) == _mark_bitmap.bit_to_addr(bit),
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1410
         "sanity check");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1411
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1412
  // Dead space crosses the boundary if (1) a partial object does not extend
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1413
  // onto the region, (2) an object does not start at the beginning of the
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1414
  // region, and (3) an object does not end at the end of the prior region.
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1415
  return region->partial_obj_size() == 0 &&
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1416
    !_mark_bitmap.is_obj_beg(bit) &&
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1417
    !_mark_bitmap.is_obj_end(bit - 1);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1418
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1419
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1420
inline bool
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1421
PSParallelCompact::is_in(HeapWord* p, HeapWord* beg_addr, HeapWord* end_addr) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1422
  return p >= beg_addr && p < end_addr;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1423
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1424
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1425
inline bool
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1426
PSParallelCompact::is_in(oop* p, HeapWord* beg_addr, HeapWord* end_addr) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1427
  return is_in((HeapWord*)p, beg_addr, end_addr);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1428
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1429
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1430
inline MutableSpace* PSParallelCompact::space(SpaceId id) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1431
  assert(id < last_space_id, "id out of range");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1432
  return _space_info[id].space();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1433
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1434
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1435
inline HeapWord* PSParallelCompact::new_top(SpaceId id) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1436
  assert(id < last_space_id, "id out of range");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1437
  return _space_info[id].new_top();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1438
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1439
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1440
inline HeapWord* PSParallelCompact::dense_prefix(SpaceId id) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1441
  assert(id < last_space_id, "id out of range");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1442
  return _space_info[id].dense_prefix();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1443
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1444
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1445
inline ObjectStartArray* PSParallelCompact::start_array(SpaceId id) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1446
  assert(id < last_space_id, "id out of range");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1447
  return _space_info[id].start_array();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1448
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1449
1682
94ad5692b3a7 6784849: par compact - can fail when to_space is non-empty
jcoomes
parents: 1670
diff changeset
  1450
#ifdef ASSERT
94ad5692b3a7 6784849: par compact - can fail when to_space is non-empty
jcoomes
parents: 1670
diff changeset
  1451
inline void
94ad5692b3a7 6784849: par compact - can fail when to_space is non-empty
jcoomes
parents: 1670
diff changeset
  1452
PSParallelCompact::check_new_location(HeapWord* old_addr, HeapWord* new_addr)
94ad5692b3a7 6784849: par compact - can fail when to_space is non-empty
jcoomes
parents: 1670
diff changeset
  1453
{
94ad5692b3a7 6784849: par compact - can fail when to_space is non-empty
jcoomes
parents: 1670
diff changeset
  1454
  assert(old_addr >= new_addr || space_id(old_addr) != space_id(new_addr),
94ad5692b3a7 6784849: par compact - can fail when to_space is non-empty
jcoomes
parents: 1670
diff changeset
  1455
         "must move left or to a different space");
5694
1e0532a6abff 6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents: 5076
diff changeset
  1456
  assert(is_object_aligned((intptr_t)old_addr) && is_object_aligned((intptr_t)new_addr),
1e0532a6abff 6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents: 5076
diff changeset
  1457
         "checking alignment");
1682
94ad5692b3a7 6784849: par compact - can fail when to_space is non-empty
jcoomes
parents: 1670
diff changeset
  1458
}
94ad5692b3a7 6784849: par compact - can fail when to_space is non-empty
jcoomes
parents: 1670
diff changeset
  1459
#endif // ASSERT
94ad5692b3a7 6784849: par compact - can fail when to_space is non-empty
jcoomes
parents: 1670
diff changeset
  1460
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1461
class MoveAndUpdateClosure: public ParMarkBitMapClosure {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1462
 public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1463
  inline MoveAndUpdateClosure(ParMarkBitMap* bitmap, ParCompactionManager* cm,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1464
                              ObjectStartArray* start_array,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1465
                              HeapWord* destination, size_t words);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1466
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1467
  // Accessors.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1468
  HeapWord* destination() const         { return _destination; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1469
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1470
  // If the object will fit (size <= words_remaining()), copy it to the current
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1471
  // destination, update the interior oops and the start array and return either
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1472
  // full (if the closure is full) or incomplete.  If the object will not fit,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1473
  // return would_overflow.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1474
  virtual IterationStatus do_addr(HeapWord* addr, size_t size);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1475
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1476
  // Copy enough words to fill this closure, starting at source().  Interior
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1477
  // oops and the start array are not updated.  Return full.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1478
  IterationStatus copy_until_full();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1479
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1480
  // Copy enough words to fill this closure or to the end of an object,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1481
  // whichever is smaller, starting at source().  Interior oops and the start
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1482
  // array are not updated.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1483
  void copy_partial_obj();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1484
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1485
 protected:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1486
  // Update variables to indicate that word_count words were processed.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1487
  inline void update_state(size_t word_count);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1488
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1489
 protected:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1490
  ObjectStartArray* const _start_array;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1491
  HeapWord*               _destination;         // Next addr to be written.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1492
};
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1493
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1494
inline
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1495
MoveAndUpdateClosure::MoveAndUpdateClosure(ParMarkBitMap* bitmap,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1496
                                           ParCompactionManager* cm,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1497
                                           ObjectStartArray* start_array,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1498
                                           HeapWord* destination,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1499
                                           size_t words) :
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1500
  ParMarkBitMapClosure(bitmap, cm, words), _start_array(start_array)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1501
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1502
  _destination = destination;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1503
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1504
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1505
inline void MoveAndUpdateClosure::update_state(size_t words)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1506
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1507
  decrement_words_remaining(words);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1508
  _source += words;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1509
  _destination += words;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1510
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1511
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1512
class UpdateOnlyClosure: public ParMarkBitMapClosure {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1513
 private:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1514
  const PSParallelCompact::SpaceId _space_id;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1515
  ObjectStartArray* const          _start_array;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1516
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1517
 public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1518
  UpdateOnlyClosure(ParMarkBitMap* mbm,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1519
                    ParCompactionManager* cm,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1520
                    PSParallelCompact::SpaceId space_id);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1521
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1522
  // Update the object.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1523
  virtual IterationStatus do_addr(HeapWord* addr, size_t words);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1524
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1525
  inline void do_addr(HeapWord* addr);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1526
};
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1527
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1528
inline void UpdateOnlyClosure::do_addr(HeapWord* addr)
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1529
{
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1530
  _start_array->allocate_block(addr);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1531
  oop(addr)->update_contents(compaction_manager());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1532
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1533
1668
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1408
diff changeset
  1534
class FillClosure: public ParMarkBitMapClosure
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1408
diff changeset
  1535
{
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1408
diff changeset
  1536
public:
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1537
  FillClosure(ParCompactionManager* cm, PSParallelCompact::SpaceId space_id) :
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1538
    ParMarkBitMapClosure(PSParallelCompact::mark_bitmap(), cm),
1668
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1408
diff changeset
  1539
    _start_array(PSParallelCompact::start_array(space_id))
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1408
diff changeset
  1540
  {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 11757
diff changeset
  1541
    assert(space_id == PSParallelCompact::old_space_id,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1542
           "cannot use FillClosure in the young gen");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1543
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1544
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1545
  virtual IterationStatus do_addr(HeapWord* addr, size_t size) {
1668
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1408
diff changeset
  1546
    CollectedHeap::fill_with_objects(addr, size);
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1408
diff changeset
  1547
    HeapWord* const end = addr + size;
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1408
diff changeset
  1548
    do {
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1408
diff changeset
  1549
      _start_array->allocate_block(addr);
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1408
diff changeset
  1550
      addr += oop(addr)->size();
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1408
diff changeset
  1551
    } while (addr < end);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1552
    return ParMarkBitMap::incomplete;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1553
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1554
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1555
private:
1668
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1408
diff changeset
  1556
  ObjectStartArray* const _start_array;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1557
};
7397
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 5918
diff changeset
  1558
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 5918
diff changeset
  1559
#endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSPARALLELCOMPACT_HPP