hotspot/src/share/vm/gc_implementation/g1/concurrentMark.hpp
author pliden
Fri, 11 Apr 2014 12:29:24 +0200
changeset 24094 5dbf1f44de18
parent 23450 c7c6202fc7e2
child 24469 33e039f8ee55
permissions -rw-r--r--
8039147: Cleanup SuspendibleThreadSet Reviewed-by: brutisso, tschatzl, mgerdin
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
     1
/*
15090
18bfcc1bbe39 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 14740
diff changeset
     2
 * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved.
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
     3
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
     4
 *
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
     5
 * This code is free software; you can redistribute it and/or modify it
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
     6
 * under the terms of the GNU General Public License version 2 only, as
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
     7
 * published by the Free Software Foundation.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
     8
 *
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
     9
 * This code is distributed in the hope that it will be useful, but WITHOUT
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    10
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    11
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    12
 * version 2 for more details (a copy is included in the LICENSE file that
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    13
 * accompanied this code).
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    14
 *
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    15
 * You should have received a copy of the GNU General Public License version
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    16
 * 2 along with this work; if not, write to the Free Software Foundation,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    17
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    18
 *
5547
f4b087cbb361 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 5350
diff changeset
    19
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
f4b087cbb361 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 5350
diff changeset
    20
 * or visit www.oracle.com if you need additional information or have any
f4b087cbb361 6941466: Oracle rebranding changes for Hotspot repositories
trims
parents: 5350
diff changeset
    21
 * questions.
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    22
 *
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    23
 */
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    24
7397
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 6761
diff changeset
    25
#ifndef SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTMARK_HPP
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 6761
diff changeset
    26
#define SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTMARK_HPP
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 6761
diff changeset
    27
23450
c7c6202fc7e2 8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents: 22551
diff changeset
    28
#include "gc_implementation/g1/heapRegionSet.hpp"
7397
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 6761
diff changeset
    29
#include "utilities/taskqueue.hpp"
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 6761
diff changeset
    30
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    31
class G1CollectedHeap;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    32
class CMTask;
13195
be27e1b6a4b9 6995781: Native Memory Tracking (Phase 1)
zgu
parents: 12381
diff changeset
    33
typedef GenericTaskQueue<oop, mtGC>            CMTaskQueue;
be27e1b6a4b9 6995781: Native Memory Tracking (Phase 1)
zgu
parents: 12381
diff changeset
    34
typedef GenericTaskQueueSet<CMTaskQueue, mtGC> CMTaskQueueSet;
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    35
7657
a80e571c3d96 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents: 7397
diff changeset
    36
// Closure used by CM during concurrent reference discovery
a80e571c3d96 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents: 7397
diff changeset
    37
// and reference processing (during remarking) to determine
a80e571c3d96 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents: 7397
diff changeset
    38
// if a particular object is alive. It is primarily used
a80e571c3d96 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents: 7397
diff changeset
    39
// to determine if referents of discovered reference objects
a80e571c3d96 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents: 7397
diff changeset
    40
// are alive. An instance is also embedded into the
a80e571c3d96 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents: 7397
diff changeset
    41
// reference processor as the _is_alive_non_header field
a80e571c3d96 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents: 7397
diff changeset
    42
class G1CMIsAliveClosure: public BoolObjectClosure {
a80e571c3d96 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents: 7397
diff changeset
    43
  G1CollectedHeap* _g1;
a80e571c3d96 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents: 7397
diff changeset
    44
 public:
12272
f87fd1292095 7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents: 11584
diff changeset
    45
  G1CMIsAliveClosure(G1CollectedHeap* g1) : _g1(g1) { }
7657
a80e571c3d96 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents: 7397
diff changeset
    46
a80e571c3d96 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents: 7397
diff changeset
    47
  bool do_object_b(oop obj);
a80e571c3d96 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents: 7397
diff changeset
    48
};
a80e571c3d96 7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents: 7397
diff changeset
    49
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    50
// A generic CM bit map.  This is essentially a wrapper around the BitMap
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    51
// class, with one bit per (1<<_shifter) HeapWords.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    52
2013
49e915da0905 6700941: G1: allocation spec missing for some G1 classes
apetrusenko
parents: 1374
diff changeset
    53
class CMBitMapRO VALUE_OBJ_CLASS_SPEC {
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    54
 protected:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    55
  HeapWord* _bmStartWord;      // base address of range covered by map
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    56
  size_t    _bmWordSize;       // map size (in #HeapWords covered)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    57
  const int _shifter;          // map to char or bit
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    58
  VirtualSpace _virtual_space; // underlying the bit map
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    59
  BitMap    _bm;               // the bit map itself
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    60
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    61
 public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    62
  // constructor
14740
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
    63
  CMBitMapRO(int shifter);
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    64
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    65
  enum { do_yield = true };
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    66
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    67
  // inquiries
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    68
  HeapWord* startWord()   const { return _bmStartWord; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    69
  size_t    sizeInWords() const { return _bmWordSize;  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    70
  // the following is one past the last word in space
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    71
  HeapWord* endWord()     const { return _bmStartWord + _bmWordSize; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    72
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    73
  // read marks
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    74
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    75
  bool isMarked(HeapWord* addr) const {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    76
    assert(_bmStartWord <= addr && addr < (_bmStartWord + _bmWordSize),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    77
           "outside underlying space?");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    78
    return _bm.at(heapWordToOffset(addr));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    79
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    80
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    81
  // iteration
11574
8a7fe61966c0 7121547: G1: High number mispredicted branches while iterating over the marking bitmap
johnc
parents: 11455
diff changeset
    82
  inline bool iterate(BitMapClosure* cl, MemRegion mr);
8a7fe61966c0 7121547: G1: High number mispredicted branches while iterating over the marking bitmap
johnc
parents: 11455
diff changeset
    83
  inline bool iterate(BitMapClosure* cl);
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    84
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    85
  // Return the address corresponding to the next marked bit at or after
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    86
  // "addr", and before "limit", if "limit" is non-NULL.  If there is no
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    87
  // such bit, returns "limit" if that is non-NULL, or else "endWord()".
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    88
  HeapWord* getNextMarkedWordAddress(HeapWord* addr,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    89
                                     HeapWord* limit = NULL) const;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    90
  // Return the address corresponding to the next unmarked bit at or after
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    91
  // "addr", and before "limit", if "limit" is non-NULL.  If there is no
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    92
  // such bit, returns "limit" if that is non-NULL, or else "endWord()".
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    93
  HeapWord* getNextUnmarkedWordAddress(HeapWord* addr,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    94
                                       HeapWord* limit = NULL) const;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    95
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    96
  // conversion utilities
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    97
  HeapWord* offsetToHeapWord(size_t offset) const {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    98
    return _bmStartWord + (offset << _shifter);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
    99
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   100
  size_t heapWordToOffset(HeapWord* addr) const {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   101
    return pointer_delta(addr, _bmStartWord) >> _shifter;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   102
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   103
  int heapWordDiffToOffsetDiff(size_t diff) const;
15949
a55dea304e8c 8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord
tamao
parents: 15495
diff changeset
   104
a55dea304e8c 8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord
tamao
parents: 15495
diff changeset
   105
  // The argument addr should be the start address of a valid object
a55dea304e8c 8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord
tamao
parents: 15495
diff changeset
   106
  HeapWord* nextObject(HeapWord* addr) {
a55dea304e8c 8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord
tamao
parents: 15495
diff changeset
   107
    oop obj = (oop) addr;
a55dea304e8c 8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord
tamao
parents: 15495
diff changeset
   108
    HeapWord* res =  addr + obj->size();
a55dea304e8c 8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord
tamao
parents: 15495
diff changeset
   109
    assert(offsetToHeapWord(heapWordToOffset(res)) == res, "sanity");
a55dea304e8c 8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord
tamao
parents: 15495
diff changeset
   110
    return res;
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   111
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   112
16685
41c34debcde0 8011872: Include Bit Map addresses in the hs_err files
stefank
parents: 16389
diff changeset
   113
  void print_on_error(outputStream* st, const char* prefix) const;
41c34debcde0 8011872: Include Bit Map addresses in the hs_err files
stefank
parents: 16389
diff changeset
   114
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   115
  // debugging
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   116
  NOT_PRODUCT(bool covers(ReservedSpace rs) const;)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   117
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   118
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   119
class CMBitMap : public CMBitMapRO {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   120
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   121
 public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   122
  // constructor
14740
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   123
  CMBitMap(int shifter) :
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   124
    CMBitMapRO(shifter) {}
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   125
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   126
  // Allocates the back store for the marking bitmap
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   127
  bool allocate(ReservedSpace heap_rs);
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   128
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   129
  // write marks
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   130
  void mark(HeapWord* addr) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   131
    assert(_bmStartWord <= addr && addr < (_bmStartWord + _bmWordSize),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   132
           "outside underlying space?");
9994
efb74fdbd46e 7046558: G1: concurrent marking optimizations
tonyp
parents: 9936
diff changeset
   133
    _bm.set_bit(heapWordToOffset(addr));
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   134
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   135
  void clear(HeapWord* addr) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   136
    assert(_bmStartWord <= addr && addr < (_bmStartWord + _bmWordSize),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   137
           "outside underlying space?");
9994
efb74fdbd46e 7046558: G1: concurrent marking optimizations
tonyp
parents: 9936
diff changeset
   138
    _bm.clear_bit(heapWordToOffset(addr));
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   139
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   140
  bool parMark(HeapWord* addr) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   141
    assert(_bmStartWord <= addr && addr < (_bmStartWord + _bmWordSize),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   142
           "outside underlying space?");
9994
efb74fdbd46e 7046558: G1: concurrent marking optimizations
tonyp
parents: 9936
diff changeset
   143
    return _bm.par_set_bit(heapWordToOffset(addr));
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   144
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   145
  bool parClear(HeapWord* addr) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   146
    assert(_bmStartWord <= addr && addr < (_bmStartWord + _bmWordSize),
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   147
           "outside underlying space?");
9994
efb74fdbd46e 7046558: G1: concurrent marking optimizations
tonyp
parents: 9936
diff changeset
   148
    return _bm.par_clear_bit(heapWordToOffset(addr));
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   149
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   150
  void markRange(MemRegion mr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   151
  void clearAll();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   152
  void clearRange(MemRegion mr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   153
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   154
  // Starting at the bit corresponding to "addr" (inclusive), find the next
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   155
  // "1" bit, if any.  This bit starts some run of consecutive "1"'s; find
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   156
  // the end of this run (stopping at "end_addr").  Return the MemRegion
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   157
  // covering from the start of the region corresponding to the first bit
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   158
  // of the run to the end of the region corresponding to the last bit of
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   159
  // the run.  If there is no "1" bit at or after "addr", return an empty
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   160
  // MemRegion.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   161
  MemRegion getAndClearMarkedRegion(HeapWord* addr, HeapWord* end_addr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   162
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   163
14740
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   164
// Represents a marking stack used by ConcurrentMarking in the G1 collector.
2013
49e915da0905 6700941: G1: allocation spec missing for some G1 classes
apetrusenko
parents: 1374
diff changeset
   165
class CMMarkStack VALUE_OBJ_CLASS_SPEC {
14740
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   166
  VirtualSpace _virtual_space;   // Underlying backing store for actual stack
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   167
  ConcurrentMark* _cm;
16388
60de0264afe8 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 15949
diff changeset
   168
  oop* _base;        // bottom of stack
14740
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   169
  jint _index;       // one more than last occupied index
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   170
  jint _capacity;    // max #elements
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   171
  jint _saved_index; // value of _index saved at start of GC
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   172
  NOT_PRODUCT(jint _max_depth;)   // max depth plumbed during run
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   173
14740
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   174
  bool  _overflow;
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   175
  bool  _should_expand;
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   176
  DEBUG_ONLY(bool _drain_in_progress;)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   177
  DEBUG_ONLY(bool _drain_in_progress_yields;)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   178
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   179
 public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   180
  CMMarkStack(ConcurrentMark* cm);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   181
  ~CMMarkStack();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   182
14740
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   183
#ifndef PRODUCT
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   184
  jint max_depth() const {
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   185
    return _max_depth;
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   186
  }
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   187
#endif
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   188
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   189
  bool allocate(size_t capacity);
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   190
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   191
  oop pop() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   192
    if (!isEmpty()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   193
      return _base[--_index] ;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   194
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   195
    return NULL;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   196
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   197
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   198
  // If overflow happens, don't do the push, and record the overflow.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   199
  // *Requires* that "ptr" is already marked.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   200
  void push(oop ptr) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   201
    if (isFull()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   202
      // Record overflow.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   203
      _overflow = true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   204
      return;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   205
    } else {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   206
      _base[_index++] = ptr;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   207
      NOT_PRODUCT(_max_depth = MAX2(_max_depth, _index));
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   208
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   209
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   210
  // Non-block impl.  Note: concurrency is allowed only with other
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   211
  // "par_push" operations, not with "pop" or "drain".  We would need
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   212
  // parallel versions of them if such concurrency was desired.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   213
  void par_push(oop ptr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   214
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   215
  // Pushes the first "n" elements of "ptr_arr" on the stack.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   216
  // Non-block impl.  Note: concurrency is allowed only with other
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   217
  // "par_adjoin_arr" or "push" operations, not with "pop" or "drain".
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   218
  void par_adjoin_arr(oop* ptr_arr, int n);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   219
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   220
  // Pushes the first "n" elements of "ptr_arr" on the stack.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   221
  // Locking impl: concurrency is allowed only with
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   222
  // "par_push_arr" and/or "par_pop_arr" operations, which use the same
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   223
  // locking strategy.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   224
  void par_push_arr(oop* ptr_arr, int n);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   225
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   226
  // If returns false, the array was empty.  Otherwise, removes up to "max"
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   227
  // elements from the stack, and transfers them to "ptr_arr" in an
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   228
  // unspecified order.  The actual number transferred is given in "n" ("n
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   229
  // == 0" is deliberately redundant with the return value.)  Locking impl:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   230
  // concurrency is allowed only with "par_push_arr" and/or "par_pop_arr"
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   231
  // operations, which use the same locking strategy.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   232
  bool par_pop_arr(oop* ptr_arr, int max, int* n);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   233
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   234
  // Drain the mark stack, applying the given closure to all fields of
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   235
  // objects on the stack.  (That is, continue until the stack is empty,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   236
  // even if closure applications add entries to the stack.)  The "bm"
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   237
  // argument, if non-null, may be used to verify that only marked objects
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   238
  // are on the mark stack.  If "yield_after" is "true", then the
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   239
  // concurrent marker performing the drain offers to yield after
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   240
  // processing each object.  If a yield occurs, stops the drain operation
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   241
  // and returns false.  Otherwise, returns true.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   242
  template<class OopClosureClass>
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   243
  bool drain(OopClosureClass* cl, CMBitMap* bm, bool yield_after = false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   244
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   245
  bool isEmpty()    { return _index == 0; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   246
  bool isFull()     { return _index == _capacity; }
14740
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   247
  int  maxElems()   { return _capacity; }
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   248
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   249
  bool overflow() { return _overflow; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   250
  void clear_overflow() { _overflow = false; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   251
14740
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   252
  bool should_expand() const { return _should_expand; }
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   253
  void set_should_expand();
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   254
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   255
  // Expand the stack, typically in response to an overflow condition
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   256
  void expand();
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   257
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   258
  int  size() { return _index; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   259
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   260
  void setEmpty()   { _index = 0; clear_overflow(); }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   261
11455
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   262
  // Record the current index.
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   263
  void note_start_of_gc();
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   264
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   265
  // Make sure that we have not added any entries to the stack during GC.
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   266
  void note_end_of_gc();
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   267
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   268
  // iterate over the oops in the mark stack, up to the bound recorded via
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   269
  // the call above.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   270
  void oops_do(OopClosure* f);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   271
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   272
9417
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   273
class ForceOverflowSettings VALUE_OBJ_CLASS_SPEC {
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   274
private:
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   275
#ifndef PRODUCT
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   276
  uintx _num_remaining;
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   277
  bool _force;
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   278
#endif // !defined(PRODUCT)
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   279
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   280
public:
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   281
  void init() PRODUCT_RETURN;
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   282
  void update() PRODUCT_RETURN;
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   283
  bool should_force() PRODUCT_RETURN_( return false; );
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   284
};
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   285
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   286
// this will enable a variety of different statistics per GC task
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   287
#define _MARKING_STATS_       0
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   288
// this will enable the higher verbose levels
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   289
#define _MARKING_VERBOSE_     0
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   290
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   291
#if _MARKING_STATS_
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   292
#define statsOnly(statement)  \
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   293
do {                          \
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   294
  statement ;                 \
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   295
} while (0)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   296
#else // _MARKING_STATS_
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   297
#define statsOnly(statement)  \
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   298
do {                          \
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   299
} while (0)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   300
#endif // _MARKING_STATS_
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   301
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   302
typedef enum {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   303
  no_verbose  = 0,   // verbose turned off
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   304
  stats_verbose,     // only prints stats at the end of marking
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   305
  low_verbose,       // low verbose, mostly per region and per major event
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   306
  medium_verbose,    // a bit more detailed than low
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   307
  high_verbose       // per object verbose
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   308
} CMVerboseLevel;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   309
11584
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   310
class YoungList;
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   311
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   312
// Root Regions are regions that are not empty at the beginning of a
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   313
// marking cycle and which we might collect during an evacuation pause
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   314
// while the cycle is active. Given that, during evacuation pauses, we
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   315
// do not copy objects that are explicitly marked, what we have to do
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   316
// for the root regions is to scan them and mark all objects reachable
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   317
// from them. According to the SATB assumptions, we only need to visit
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   318
// each object once during marking. So, as long as we finish this scan
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   319
// before the next evacuation pause, we can copy the objects from the
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   320
// root regions without having to mark them or do anything else to them.
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   321
//
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   322
// Currently, we only support root region scanning once (at the start
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   323
// of the marking cycle) and the root regions are all the survivor
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   324
// regions populated during the initial-mark pause.
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   325
class CMRootRegions VALUE_OBJ_CLASS_SPEC {
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   326
private:
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   327
  YoungList*           _young_list;
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   328
  ConcurrentMark*      _cm;
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   329
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   330
  volatile bool        _scan_in_progress;
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   331
  volatile bool        _should_abort;
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   332
  HeapRegion* volatile _next_survivor;
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   333
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   334
public:
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   335
  CMRootRegions();
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   336
  // We actually do most of the initialization in this method.
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   337
  void init(G1CollectedHeap* g1h, ConcurrentMark* cm);
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   338
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   339
  // Reset the claiming / scanning of the root regions.
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   340
  void prepare_for_scan();
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   341
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   342
  // Forces get_next() to return NULL so that the iteration aborts early.
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   343
  void abort() { _should_abort = true; }
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   344
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   345
  // Return true if the CM thread are actively scanning root regions,
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   346
  // false otherwise.
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   347
  bool scan_in_progress() { return _scan_in_progress; }
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   348
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   349
  // Claim the next root region to scan atomically, or return NULL if
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   350
  // all have been claimed.
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   351
  HeapRegion* claim_next();
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   352
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   353
  // Flag that we're done with root region scanning and notify anyone
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   354
  // who's waiting on it. If aborted is false, assume that all regions
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   355
  // have been claimed.
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   356
  void scan_finished();
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   357
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   358
  // If CM threads are still scanning root regions, wait until they
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   359
  // are done. Return true if we had to wait, false otherwise.
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   360
  bool wait_until_scan_finished();
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   361
};
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   362
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   363
class ConcurrentMarkThread;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   364
13195
be27e1b6a4b9 6995781: Native Memory Tracking (Phase 1)
zgu
parents: 12381
diff changeset
   365
class ConcurrentMark: public CHeapObj<mtGC> {
14740
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   366
  friend class CMMarkStack;
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   367
  friend class ConcurrentMarkThread;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   368
  friend class CMTask;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   369
  friend class CMBitMapClosure;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   370
  friend class CMGlobalObjectClosure;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   371
  friend class CMRemarkTask;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   372
  friend class CMConcurrentMarkingTask;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   373
  friend class G1ParNoteEndTask;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   374
  friend class CalcLiveObjectsClosure;
10670
4ea0e7d2ffbc 6484982: G1: process references during evacuation pauses
johnc
parents: 10280
diff changeset
   375
  friend class G1CMRefProcTaskProxy;
4ea0e7d2ffbc 6484982: G1: process references during evacuation pauses
johnc
parents: 10280
diff changeset
   376
  friend class G1CMRefProcTaskExecutor;
15495
d791a8e8cf6b 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 15489
diff changeset
   377
  friend class G1CMKeepAliveAndDrainClosure;
d791a8e8cf6b 8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents: 15489
diff changeset
   378
  friend class G1CMDrainMarkingStackClosure;
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   379
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   380
protected:
22551
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   381
  ConcurrentMarkThread* _cmThread;   // The thread doing the work
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   382
  G1CollectedHeap*      _g1h;        // The heap
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   383
  uint                  _parallel_marking_threads; // The number of marking
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   384
                                                   // threads we're using
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   385
  uint                  _max_parallel_marking_threads; // Max number of marking
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   386
                                                       // threads we'll ever use
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   387
  double                _sleep_factor; // How much we have to sleep, with
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   388
                                       // respect to the work we just did, to
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   389
                                       // meet the marking overhead goal
22551
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   390
  double                _marking_task_overhead; // Marking target overhead for
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   391
                                                // a single task
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   392
22551
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   393
  // Same as the two above, but for the cleanup task
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   394
  double                _cleanup_sleep_factor;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   395
  double                _cleanup_task_overhead;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   396
7923
fc200fcd4e05 6977804: G1: remove the zero-filling thread
tonyp
parents: 7657
diff changeset
   397
  FreeRegionList        _cleanup_list;
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   398
11575
d7a2e4295dc9 7130334: G1: Change comments and error messages that refer to CMS in g1/concurrentMark.cpp/hpp
brutisso
parents: 11574
diff changeset
   399
  // Concurrent marking support structures
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   400
  CMBitMap                _markBitMap1;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   401
  CMBitMap                _markBitMap2;
22551
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   402
  CMBitMapRO*             _prevMarkBitMap; // Completed mark bitmap
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   403
  CMBitMap*               _nextMarkBitMap; // Under-construction mark bitmap
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   404
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   405
  BitMap                  _region_bm;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   406
  BitMap                  _card_bm;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   407
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   408
  // Heap bounds
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   409
  HeapWord*               _heap_start;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   410
  HeapWord*               _heap_end;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   411
22551
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   412
  // Root region tracking and claiming
11584
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   413
  CMRootRegions           _root_regions;
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   414
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   415
  // For gray objects
22551
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   416
  CMMarkStack             _markStack; // Grey objects behind global finger
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   417
  HeapWord* volatile      _finger;  // The global finger, region aligned,
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   418
                                    // always points to the end of the
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   419
                                    // last claimed region
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   420
22551
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   421
  // Marking tasks
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   422
  uint                    _max_worker_id;// Maximum worker id
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   423
  uint                    _active_tasks; // Task num currently active
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   424
  CMTask**                _tasks;        // Task queue array (max_worker_id len)
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   425
  CMTaskQueueSet*         _task_queues;  // Task queue set
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   426
  ParallelTaskTerminator  _terminator;   // For termination
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   427
22551
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   428
  // Two sync barriers that are used to synchronize tasks when an
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   429
  // overflow occurs. The algorithm is the following. All tasks enter
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   430
  // the first one to ensure that they have all stopped manipulating
22551
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   431
  // the global data structures. After they exit it, they re-initialize
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   432
  // their data structures and task 0 re-initializes the global data
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   433
  // structures. Then, they enter the second sync barrier. This
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   434
  // ensure, that no task starts doing work before all data
22551
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   435
  // structures (local and global) have been re-initialized. When they
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   436
  // exit it, they are free to start working again.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   437
  WorkGangBarrierSync     _first_overflow_barrier_sync;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   438
  WorkGangBarrierSync     _second_overflow_barrier_sync;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   439
22551
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   440
  // This is set by any task, when an overflow on the global data
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   441
  // structures is detected
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   442
  volatile bool           _has_overflown;
22551
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   443
  // True: marking is concurrent, false: we're in remark
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   444
  volatile bool           _concurrent;
22551
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   445
  // Set at the end of a Full GC so that marking aborts
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   446
  volatile bool           _has_aborted;
6761
f9191297ce83 6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents: 5547
diff changeset
   447
22551
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   448
  // Used when remark aborts due to an overflow to indicate that
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   449
  // another concurrent marking phase should start
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   450
  volatile bool           _restart_for_overflow;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   451
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   452
  // This is true from the very start of concurrent marking until the
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   453
  // point when all the tasks complete their work. It is really used
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   454
  // to determine the points between the end of concurrent marking and
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   455
  // time of remark.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   456
  volatile bool           _concurrent_marking_in_progress;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   457
22551
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   458
  // Verbose level
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   459
  CMVerboseLevel          _verbose_level;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   460
22551
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   461
  // All of these times are in ms
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   462
  NumberSeq _init_times;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   463
  NumberSeq _remark_times;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   464
  NumberSeq   _remark_mark_times;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   465
  NumberSeq   _remark_weak_ref_times;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   466
  NumberSeq _cleanup_times;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   467
  double    _total_counting_time;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   468
  double    _total_rs_scrub_time;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   469
22551
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   470
  double*   _accum_task_vtime;   // Accumulated task vtime
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   471
11174
fccee5238e70 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 10670
diff changeset
   472
  FlexibleWorkGang* _parallel_workers;
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   473
9417
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   474
  ForceOverflowSettings _force_overflow_conc;
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   475
  ForceOverflowSettings _force_overflow_stw;
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   476
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   477
  void weakRefsWork(bool clear_all_soft_refs);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   478
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   479
  void swapMarkBitMaps();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   480
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   481
  // It resets the global marking data structures, as well as the
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   482
  // task local ones; should be called during initial mark.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   483
  void reset();
15090
18bfcc1bbe39 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 14740
diff changeset
   484
18bfcc1bbe39 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 14740
diff changeset
   485
  // Resets all the marking data structures. Called when we have to restart
18bfcc1bbe39 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 14740
diff changeset
   486
  // marking or when marking completes (via set_non_marking_state below).
18bfcc1bbe39 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 14740
diff changeset
   487
  void reset_marking_state(bool clear_overflow = true);
18bfcc1bbe39 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 14740
diff changeset
   488
18bfcc1bbe39 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 14740
diff changeset
   489
  // We do this after we're done with marking so that the marking data
22551
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   490
  // structures are initialized to a sensible and predictable state.
15090
18bfcc1bbe39 8004816: G1: Kitchensink failures after marking stack changes
johnc
parents: 14740
diff changeset
   491
  void set_non_marking_state();
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   492
16389
70f98431dd29 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 16388
diff changeset
   493
  // Called to indicate how many threads are currently active.
70f98431dd29 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 16388
diff changeset
   494
  void set_concurrency(uint active_tasks);
70f98431dd29 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 16388
diff changeset
   495
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   496
  // It should be called to indicate which phase we're in (concurrent
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   497
  // mark or remark) and how many threads are currently active.
16389
70f98431dd29 8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents: 16388
diff changeset
   498
  void set_concurrency_and_phase(uint active_tasks, bool concurrent);
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   499
22551
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   500
  // Prints all gathered CM-related statistics
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   501
  void print_stats();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   502
7923
fc200fcd4e05 6977804: G1: remove the zero-filling thread
tonyp
parents: 7657
diff changeset
   503
  bool cleanup_list_is_empty() {
fc200fcd4e05 6977804: G1: remove the zero-filling thread
tonyp
parents: 7657
diff changeset
   504
    return _cleanup_list.is_empty();
fc200fcd4e05 6977804: G1: remove the zero-filling thread
tonyp
parents: 7657
diff changeset
   505
  }
fc200fcd4e05 6977804: G1: remove the zero-filling thread
tonyp
parents: 7657
diff changeset
   506
22551
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   507
  // Accessor methods
15489
0f2bd608c4f2 8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents: 15090
diff changeset
   508
  uint parallel_marking_threads() const     { return _parallel_marking_threads; }
0f2bd608c4f2 8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents: 15090
diff changeset
   509
  uint max_parallel_marking_threads() const { return _max_parallel_marking_threads;}
0f2bd608c4f2 8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents: 15090
diff changeset
   510
  double sleep_factor()                     { return _sleep_factor; }
0f2bd608c4f2 8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents: 15090
diff changeset
   511
  double marking_task_overhead()            { return _marking_task_overhead;}
0f2bd608c4f2 8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents: 15090
diff changeset
   512
  double cleanup_sleep_factor()             { return _cleanup_sleep_factor; }
0f2bd608c4f2 8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents: 15090
diff changeset
   513
  double cleanup_task_overhead()            { return _cleanup_task_overhead;}
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   514
15489
0f2bd608c4f2 8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents: 15090
diff changeset
   515
  bool use_parallel_marking_threads() const {
0f2bd608c4f2 8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents: 15090
diff changeset
   516
    assert(parallel_marking_threads() <=
0f2bd608c4f2 8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents: 15090
diff changeset
   517
           max_parallel_marking_threads(), "sanity");
0f2bd608c4f2 8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents: 15090
diff changeset
   518
    assert((_parallel_workers == NULL && parallel_marking_threads() == 0) ||
0f2bd608c4f2 8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents: 15090
diff changeset
   519
           parallel_marking_threads() > 0,
0f2bd608c4f2 8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents: 15090
diff changeset
   520
           "parallel workers not set up correctly");
0f2bd608c4f2 8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents: 15090
diff changeset
   521
    return _parallel_workers != NULL;
0f2bd608c4f2 8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents: 15090
diff changeset
   522
  }
0f2bd608c4f2 8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents: 15090
diff changeset
   523
0f2bd608c4f2 8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents: 15090
diff changeset
   524
  HeapWord*               finger()          { return _finger;   }
0f2bd608c4f2 8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents: 15090
diff changeset
   525
  bool                    concurrent()      { return _concurrent; }
0f2bd608c4f2 8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents: 15090
diff changeset
   526
  uint                    active_tasks()    { return _active_tasks; }
0f2bd608c4f2 8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents: 15090
diff changeset
   527
  ParallelTaskTerminator* terminator()      { return &_terminator; }
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   528
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   529
  // It claims the next available region to be scanned by a marking
14073
6012178c0c19 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 13919
diff changeset
   530
  // task/thread. It might return NULL if the next region is empty or
6012178c0c19 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 13919
diff changeset
   531
  // we have run out of regions. In the latter case, out_of_regions()
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   532
  // determines whether we've really run out of regions or the task
14073
6012178c0c19 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 13919
diff changeset
   533
  // should call claim_region() again. This might seem a bit
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   534
  // awkward. Originally, the code was written so that claim_region()
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   535
  // either successfully returned with a non-empty region or there
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   536
  // were no more regions to be claimed. The problem with this was
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   537
  // that, in certain circumstances, it iterated over large chunks of
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   538
  // the heap finding only empty regions and, while it was working, it
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   539
  // was preventing the calling task to call its regular clock
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   540
  // method. So, this way, each task will spend very little time in
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   541
  // claim_region() and is allowed to call the regular clock method
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   542
  // frequently.
14073
6012178c0c19 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 13919
diff changeset
   543
  HeapRegion* claim_region(uint worker_id);
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   544
22551
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   545
  // It determines whether we've run out of regions to scan
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   546
  bool        out_of_regions() { return _finger == _heap_end; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   547
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   548
  // Returns the task with the given id
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   549
  CMTask* task(int id) {
4026
10386ea70fe5 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 4022
diff changeset
   550
    assert(0 <= id && id < (int) _active_tasks,
10386ea70fe5 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 4022
diff changeset
   551
           "task id not within active bounds");
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   552
    return _tasks[id];
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   553
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   554
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   555
  // Returns the task queue with the given id
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   556
  CMTaskQueue* task_queue(int id) {
4026
10386ea70fe5 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 4022
diff changeset
   557
    assert(0 <= id && id < (int) _active_tasks,
10386ea70fe5 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 4022
diff changeset
   558
           "task queue id not within active bounds");
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   559
    return (CMTaskQueue*) _task_queues->queue(id);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   560
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   561
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   562
  // Returns the task queue set
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   563
  CMTaskQueueSet* task_queues()  { return _task_queues; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   564
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   565
  // Access / manipulation of the overflow flag which is set to
12272
f87fd1292095 7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents: 11584
diff changeset
   566
  // indicate that the global stack has overflown
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   567
  bool has_overflown()           { return _has_overflown; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   568
  void set_has_overflown()       { _has_overflown = true; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   569
  void clear_has_overflown()     { _has_overflown = false; }
11584
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   570
  bool restart_for_overflow()    { return _restart_for_overflow; }
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   571
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   572
  // Methods to enter the two overflow sync barriers
14073
6012178c0c19 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 13919
diff changeset
   573
  void enter_first_sync_barrier(uint worker_id);
6012178c0c19 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 13919
diff changeset
   574
  void enter_second_sync_barrier(uint worker_id);
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   575
9417
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   576
  ForceOverflowSettings* force_overflow_conc() {
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   577
    return &_force_overflow_conc;
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   578
  }
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   579
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   580
  ForceOverflowSettings* force_overflow_stw() {
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   581
    return &_force_overflow_stw;
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   582
  }
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   583
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   584
  ForceOverflowSettings* force_overflow() {
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   585
    if (concurrent()) {
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   586
      return force_overflow_conc();
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   587
    } else {
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   588
      return force_overflow_stw();
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   589
    }
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   590
  }
6719a2e727c0 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 8930
diff changeset
   591
11583
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   592
  // Live Data Counting data structures...
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   593
  // These data structures are initialized at the start of
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   594
  // marking. They are written to while marking is active.
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   595
  // They are aggregated during remark; the aggregated values
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   596
  // are then used to populate the _region_bm, _card_bm, and
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   597
  // the total live bytes, which are then subsequently updated
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   598
  // during cleanup.
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   599
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   600
  // An array of bitmaps (one bit map per task). Each bitmap
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   601
  // is used to record the cards spanned by the live objects
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   602
  // marked by that task/worker.
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   603
  BitMap*  _count_card_bitmaps;
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   604
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   605
  // Used to record the number of marked live bytes
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   606
  // (for each region, by worker thread).
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   607
  size_t** _count_marked_bytes;
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   608
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   609
  // Card index of the bottom of the G1 heap. Used for biasing indices into
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   610
  // the card bitmaps.
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   611
  intptr_t _heap_bottom_card_num;
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   612
14740
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   613
  // Set to true when initialization is complete
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   614
  bool _completed_initialization;
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   615
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   616
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   617
  // Manipulation of the global mark stack.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   618
  // Notice that the first mark_stack_push is CAS-based, whereas the
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   619
  // two below are Mutex-based. This is OK since the first one is only
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   620
  // called during evacuation pauses and doesn't compete with the
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   621
  // other two (which are called by the marking tasks during
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   622
  // concurrent marking or remark).
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   623
  bool mark_stack_push(oop p) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   624
    _markStack.par_push(p);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   625
    if (_markStack.overflow()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   626
      set_has_overflown();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   627
      return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   628
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   629
    return true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   630
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   631
  bool mark_stack_push(oop* arr, int n) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   632
    _markStack.par_push_arr(arr, n);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   633
    if (_markStack.overflow()) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   634
      set_has_overflown();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   635
      return false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   636
    }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   637
    return true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   638
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   639
  void mark_stack_pop(oop* arr, int max, int* n) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   640
    _markStack.par_pop_arr(arr, max, n);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   641
  }
9999
5f0b78217054 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 9995
diff changeset
   642
  size_t mark_stack_size()                { return _markStack.size(); }
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   643
  size_t partial_mark_stack_size_target() { return _markStack.maxElems()/3; }
9999
5f0b78217054 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 9995
diff changeset
   644
  bool mark_stack_overflow()              { return _markStack.overflow(); }
5f0b78217054 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 9995
diff changeset
   645
  bool mark_stack_empty()                 { return _markStack.isEmpty(); }
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   646
11584
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   647
  CMRootRegions* root_regions() { return &_root_regions; }
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   648
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   649
  bool concurrent_marking_in_progress() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   650
    return _concurrent_marking_in_progress;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   651
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   652
  void set_concurrent_marking_in_progress() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   653
    _concurrent_marking_in_progress = true;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   654
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   655
  void clear_concurrent_marking_in_progress() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   656
    _concurrent_marking_in_progress = false;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   657
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   658
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   659
  void update_accum_task_vtime(int i, double vtime) {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   660
    _accum_task_vtime[i] += vtime;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   661
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   662
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   663
  double all_task_accum_vtime() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   664
    double ret = 0.0;
14073
6012178c0c19 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 13919
diff changeset
   665
    for (uint i = 0; i < _max_worker_id; ++i)
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   666
      ret += _accum_task_vtime[i];
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   667
    return ret;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   668
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   669
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   670
  // Attempts to steal an object from the task queues of other tasks
14073
6012178c0c19 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 13919
diff changeset
   671
  bool try_stealing(uint worker_id, int* hash_seed, oop& obj) {
6012178c0c19 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 13919
diff changeset
   672
    return _task_queues->steal(worker_id, hash_seed, obj);
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   673
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   674
14740
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   675
  ConcurrentMark(G1CollectedHeap* g1h, ReservedSpace heap_rs);
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   676
  ~ConcurrentMark();
11583
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   677
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   678
  ConcurrentMarkThread* cmThread() { return _cmThread; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   679
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   680
  CMBitMapRO* prevMarkBitMap() const { return _prevMarkBitMap; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   681
  CMBitMap*   nextMarkBitMap() const { return _nextMarkBitMap; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   682
11174
fccee5238e70 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 10670
diff changeset
   683
  // Returns the number of GC threads to be used in a concurrent
fccee5238e70 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 10670
diff changeset
   684
  // phase based on the number of GC threads being used in a STW
fccee5238e70 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 10670
diff changeset
   685
  // phase.
11396
917d8673b5ef 7121618: Change type of number of GC workers to unsigned int.
jmasa
parents: 11250
diff changeset
   686
  uint scale_parallel_threads(uint n_par_threads);
11174
fccee5238e70 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 10670
diff changeset
   687
fccee5238e70 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 10670
diff changeset
   688
  // Calculates the number of GC threads to be used in a concurrent phase.
11396
917d8673b5ef 7121618: Change type of number of GC workers to unsigned int.
jmasa
parents: 11250
diff changeset
   689
  uint calc_parallel_marking_threads();
11174
fccee5238e70 6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents: 10670
diff changeset
   690
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   691
  // The following three are interaction between CM and
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   692
  // G1CollectedHeap
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   693
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   694
  // This notifies CM that a root during initial-mark needs to be
11584
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   695
  // grayed. It is MT-safe. word_size is the size of the object in
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   696
  // words. It is passed explicitly as sometimes we cannot calculate
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   697
  // it from the given object because it might be in an inconsistent
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   698
  // state (e.g., in to-space and being copied). So the caller is
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   699
  // responsible for dealing with this issue (e.g., get the size from
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   700
  // the from-space image when the to-space image might be
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   701
  // inconsistent) and always passing the size. hr is the region that
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   702
  // contains the object and it's passed optionally from callers who
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   703
  // might already have it (no point in recalculating it).
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   704
  inline void grayRoot(oop obj, size_t word_size,
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   705
                       uint worker_id, HeapRegion* hr = NULL);
11455
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   706
5344
f78ef2531f44 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 5242
diff changeset
   707
  // It iterates over the heap and for each object it comes across it
f78ef2531f44 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 5242
diff changeset
   708
  // will dump the contents of its reference fields, as well as
f78ef2531f44 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 5242
diff changeset
   709
  // liveness information for the object and its referents. The dump
f78ef2531f44 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 5242
diff changeset
   710
  // will be written to a file with the following name:
9995
290620c08233 7004681: G1: Extend marking verification to Full GCs
johnc
parents: 9994
diff changeset
   711
  // G1PrintReachableBaseFile + "." + str.
290620c08233 7004681: G1: Extend marking verification to Full GCs
johnc
parents: 9994
diff changeset
   712
  // vo decides whether the prev (vo == UsePrevMarking), the next
290620c08233 7004681: G1: Extend marking verification to Full GCs
johnc
parents: 9994
diff changeset
   713
  // (vo == UseNextMarking) marking information, or the mark word
290620c08233 7004681: G1: Extend marking verification to Full GCs
johnc
parents: 9994
diff changeset
   714
  // (vo == UseMarkWord) will be used to determine the liveness of
290620c08233 7004681: G1: Extend marking verification to Full GCs
johnc
parents: 9994
diff changeset
   715
  // each object / referent.
290620c08233 7004681: G1: Extend marking verification to Full GCs
johnc
parents: 9994
diff changeset
   716
  // If all is true, all objects in the heap will be dumped, otherwise
290620c08233 7004681: G1: Extend marking verification to Full GCs
johnc
parents: 9994
diff changeset
   717
  // only the live ones. In the dump the following symbols / breviations
290620c08233 7004681: G1: Extend marking verification to Full GCs
johnc
parents: 9994
diff changeset
   718
  // are used:
5344
f78ef2531f44 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 5242
diff changeset
   719
  //   M : an explicitly live object (its bitmap bit is set)
f78ef2531f44 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 5242
diff changeset
   720
  //   > : an implicitly live object (over tams)
f78ef2531f44 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 5242
diff changeset
   721
  //   O : an object outside the G1 heap (typically: in the perm gen)
f78ef2531f44 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 5242
diff changeset
   722
  //   NOT : a reference field whose referent is not live
f78ef2531f44 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 5242
diff changeset
   723
  //   AND MARKED : indicates that an object is both explicitly and
f78ef2531f44 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 5242
diff changeset
   724
  //   implicitly live (it should be one or the other, not both)
f78ef2531f44 6937142: G1: improvements to debugging output (S-M)
tonyp
parents: 5242
diff changeset
   725
  void print_reachable(const char* str,
9995
290620c08233 7004681: G1: Extend marking verification to Full GCs
johnc
parents: 9994
diff changeset
   726
                       VerifyOption vo, bool all) PRODUCT_RETURN;
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   727
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   728
  // Clear the next marking bitmap (will be called concurrently).
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   729
  void clearNextBitmap();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   730
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   731
  // These two do the work that needs to be done before and after the
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   732
  // initial root checkpoint. Since this checkpoint can be done at two
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   733
  // different points (i.e. an explicit pause or piggy-backed on a
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   734
  // young collection), then it's nice to be able to easily share the
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   735
  // pre/post code. It might be the case that we can put everything in
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   736
  // the post method. TP
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   737
  void checkpointRootsInitialPre();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   738
  void checkpointRootsInitialPost();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   739
11584
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   740
  // Scan all the root regions and mark everything reachable from
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   741
  // them.
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   742
  void scanRootRegions();
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   743
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   744
  // Scan a single root region and mark everything reachable from it.
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   745
  void scanRootRegion(HeapRegion* hr, uint worker_id);
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   746
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   747
  // Do concurrent phase of marking, to a tentative transitive closure.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   748
  void markFromRoots();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   749
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   750
  void checkpointRootsFinal(bool clear_all_soft_refs);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   751
  void checkpointRootsFinalWork();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   752
  void cleanup();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   753
  void completeCleanup();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   754
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   755
  // Mark in the previous bitmap.  NB: this is usually read-only, so use
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   756
  // this carefully!
11455
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   757
  inline void markPrev(oop p);
11583
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   758
11455
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   759
  // Clears marks for all objects in the given range, for the prev,
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   760
  // next, or both bitmaps.  NB: the previous bitmap is usually
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   761
  // read-only, so use this carefully!
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   762
  void clearRangePrevBitmap(MemRegion mr);
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   763
  void clearRangeNextBitmap(MemRegion mr);
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   764
  void clearRangeBothBitmaps(MemRegion mr);
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   765
11455
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   766
  // Notify data structures that a GC has started.
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   767
  void note_start_of_gc() {
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   768
    _markStack.note_start_of_gc();
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   769
  }
11455
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   770
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   771
  // Notify data structures that a GC is finished.
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   772
  void note_end_of_gc() {
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   773
    _markStack.note_end_of_gc();
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   774
  }
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   775
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   776
  // Verify that there are no CSet oops on the stacks (taskqueues /
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   777
  // global mark stack), enqueued SATB buffers, per-thread SATB
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   778
  // buffers, and fingers (global / per-task). The boolean parameters
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   779
  // decide which of the above data structures to verify. If marking
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   780
  // is not in progress, it's a no-op.
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   781
  void verify_no_cset_oops(bool verify_stacks,
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   782
                           bool verify_enqueued_buffers,
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   783
                           bool verify_thread_buffers,
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   784
                           bool verify_fingers) PRODUCT_RETURN;
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
   785
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   786
  // It is called at the end of an evacuation pause during marking so
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   787
  // that CM is notified of where the new end of the heap is. It
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   788
  // doesn't do anything if concurrent_marking_in_progress() is false,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   789
  // unless the force parameter is true.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   790
  void update_g1_committed(bool force = false);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   791
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   792
  bool isMarked(oop p) const {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   793
    assert(p != NULL && p->is_oop(), "expected an oop");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   794
    HeapWord* addr = (HeapWord*)p;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   795
    assert(addr >= _nextMarkBitMap->startWord() ||
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   796
           addr < _nextMarkBitMap->endWord(), "in a region");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   797
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   798
    return _nextMarkBitMap->isMarked(addr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   799
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   800
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   801
  inline bool not_yet_marked(oop p) const;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   802
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   803
  // XXX Debug code
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   804
  bool containing_card_is_marked(void* p);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   805
  bool containing_cards_are_marked(void* start, void* last);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   806
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   807
  bool isPrevMarked(oop p) const {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   808
    assert(p != NULL && p->is_oop(), "expected an oop");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   809
    HeapWord* addr = (HeapWord*)p;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   810
    assert(addr >= _prevMarkBitMap->startWord() ||
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   811
           addr < _prevMarkBitMap->endWord(), "in a region");
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   812
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   813
    return _prevMarkBitMap->isMarked(addr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   814
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   815
11396
917d8673b5ef 7121618: Change type of number of GC workers to unsigned int.
jmasa
parents: 11250
diff changeset
   816
  inline bool do_yield_check(uint worker_i = 0);
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   817
22551
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   818
  // Called to abort the marking cycle after a Full GC takes place.
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   819
  void abort();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   820
18025
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17625
diff changeset
   821
  bool has_aborted()      { return _has_aborted; }
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17625
diff changeset
   822
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   823
  // This prints the global/local fingers. It is used for debugging.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   824
  NOT_PRODUCT(void print_finger();)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   825
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   826
  void print_summary_info();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   827
4022
2ec87d5043f7 6885041: G1: inconsistent thread dump
tonyp
parents: 3691
diff changeset
   828
  void print_worker_threads_on(outputStream* st) const;
2ec87d5043f7 6885041: G1: inconsistent thread dump
tonyp
parents: 3691
diff changeset
   829
16685
41c34debcde0 8011872: Include Bit Map addresses in the hs_err files
stefank
parents: 16389
diff changeset
   830
  void print_on_error(outputStream* st) const;
41c34debcde0 8011872: Include Bit Map addresses in the hs_err files
stefank
parents: 16389
diff changeset
   831
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   832
  // The following indicate whether a given verbose level has been
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   833
  // set. Notice that anything above stats is conditional to
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   834
  // _MARKING_VERBOSE_ having been set to 1
9999
5f0b78217054 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 9995
diff changeset
   835
  bool verbose_stats() {
5f0b78217054 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 9995
diff changeset
   836
    return _verbose_level >= stats_verbose;
5f0b78217054 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 9995
diff changeset
   837
  }
5f0b78217054 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 9995
diff changeset
   838
  bool verbose_low() {
5f0b78217054 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 9995
diff changeset
   839
    return _MARKING_VERBOSE_ && _verbose_level >= low_verbose;
5f0b78217054 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 9995
diff changeset
   840
  }
5f0b78217054 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 9995
diff changeset
   841
  bool verbose_medium() {
5f0b78217054 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 9995
diff changeset
   842
    return _MARKING_VERBOSE_ && _verbose_level >= medium_verbose;
5f0b78217054 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 9995
diff changeset
   843
  }
5f0b78217054 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 9995
diff changeset
   844
  bool verbose_high() {
5f0b78217054 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 9995
diff changeset
   845
    return _MARKING_VERBOSE_ && _verbose_level >= high_verbose;
5f0b78217054 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 9995
diff changeset
   846
  }
11583
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   847
13919
01f6d01a9004 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 13195
diff changeset
   848
  // Liveness counting
01f6d01a9004 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 13195
diff changeset
   849
01f6d01a9004 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 13195
diff changeset
   850
  // Utility routine to set an exclusive range of cards on the given
01f6d01a9004 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 13195
diff changeset
   851
  // card liveness bitmap
01f6d01a9004 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 13195
diff changeset
   852
  inline void set_card_bitmap_range(BitMap* card_bm,
01f6d01a9004 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 13195
diff changeset
   853
                                    BitMap::idx_t start_idx,
01f6d01a9004 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 13195
diff changeset
   854
                                    BitMap::idx_t end_idx,
01f6d01a9004 7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents: 13195
diff changeset
   855
                                    bool is_par);
11583
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   856
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   857
  // Returns the card number of the bottom of the G1 heap.
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   858
  // Used in biasing indices into accounting card bitmaps.
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   859
  intptr_t heap_bottom_card_num() const {
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   860
    return _heap_bottom_card_num;
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   861
  }
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   862
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   863
  // Returns the card bitmap for a given task or worker id.
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   864
  BitMap* count_card_bitmap_for(uint worker_id) {
14073
6012178c0c19 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 13919
diff changeset
   865
    assert(0 <= worker_id && worker_id < _max_worker_id, "oob");
11583
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   866
    assert(_count_card_bitmaps != NULL, "uninitialized");
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   867
    BitMap* task_card_bm = &_count_card_bitmaps[worker_id];
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   868
    assert(task_card_bm->size() == _card_bm.size(), "size mismatch");
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   869
    return task_card_bm;
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   870
  }
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   871
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   872
  // Returns the array containing the marked bytes for each region,
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   873
  // for the given worker or task id.
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   874
  size_t* count_marked_bytes_array_for(uint worker_id) {
14073
6012178c0c19 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 13919
diff changeset
   875
    assert(0 <= worker_id && worker_id < _max_worker_id, "oob");
11583
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   876
    assert(_count_marked_bytes != NULL, "uninitialized");
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   877
    size_t* marked_bytes_array = _count_marked_bytes[worker_id];
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   878
    assert(marked_bytes_array != NULL, "uninitialized");
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   879
    return marked_bytes_array;
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   880
  }
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   881
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   882
  // Returns the index in the liveness accounting card table bitmap
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   883
  // for the given address
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   884
  inline BitMap::idx_t card_bitmap_index_for(HeapWord* addr);
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   885
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   886
  // Counts the size of the given memory region in the the given
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   887
  // marked_bytes array slot for the given HeapRegion.
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   888
  // Sets the bits in the given card bitmap that are associated with the
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   889
  // cards that are spanned by the memory region.
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   890
  inline void count_region(MemRegion mr, HeapRegion* hr,
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   891
                           size_t* marked_bytes_array,
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   892
                           BitMap* task_card_bm);
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   893
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   894
  // Counts the given memory region in the task/worker counting
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   895
  // data structures for the given worker id.
11584
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   896
  inline void count_region(MemRegion mr, HeapRegion* hr, uint worker_id);
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   897
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   898
  // Counts the given memory region in the task/worker counting
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   899
  // data structures for the given worker id.
11583
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   900
  inline void count_region(MemRegion mr, uint worker_id);
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   901
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   902
  // Counts the given object in the given task/worker counting
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   903
  // data structures.
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   904
  inline void count_object(oop obj, HeapRegion* hr,
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   905
                           size_t* marked_bytes_array,
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   906
                           BitMap* task_card_bm);
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   907
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   908
  // Counts the given object in the task/worker counting data
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   909
  // structures for the given worker id.
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   910
  inline void count_object(oop obj, HeapRegion* hr, uint worker_id);
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   911
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   912
  // Attempts to mark the given object and, if successful, counts
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   913
  // the object in the given task/worker counting structures.
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   914
  inline bool par_mark_and_count(oop obj, HeapRegion* hr,
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   915
                                 size_t* marked_bytes_array,
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   916
                                 BitMap* task_card_bm);
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   917
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   918
  // Attempts to mark the given object and, if successful, counts
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   919
  // the object in the task/worker counting structures for the
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   920
  // given worker id.
11584
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   921
  inline bool par_mark_and_count(oop obj, size_t word_size,
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   922
                                 HeapRegion* hr, uint worker_id);
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   923
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   924
  // Attempts to mark the given object and, if successful, counts
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   925
  // the object in the task/worker counting structures for the
e1df4d08a1f4 7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents: 11583
diff changeset
   926
  // given worker id.
11583
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   927
  inline bool par_mark_and_count(oop obj, HeapRegion* hr, uint worker_id);
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   928
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   929
  // Similar to the above routine but we don't know the heap region that
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   930
  // contains the object to be marked/counted, which this routine looks up.
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   931
  inline bool par_mark_and_count(oop obj, uint worker_id);
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   932
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   933
  // Similar to the above routine but there are times when we cannot
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   934
  // safely calculate the size of obj due to races and we, therefore,
22551
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   935
  // pass the size in as a parameter. It is the caller's responsibility
11583
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   936
  // to ensure that the size passed in for obj is valid.
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   937
  inline bool par_mark_and_count(oop obj, size_t word_size, uint worker_id);
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   938
22551
9bf46d16dcc6 8025856: Fix typos in the GC code
jwilhelm
parents: 19339
diff changeset
   939
  // Unconditionally mark the given object, and unconditionally count
11583
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   940
  // the object in the counting structures for worker id 0.
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   941
  // Should *not* be called from parallel code.
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   942
  inline bool mark_and_count(oop obj, HeapRegion* hr);
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   943
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   944
  // Similar to the above routine but we don't know the heap region that
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   945
  // contains the object to be marked/counted, which this routine looks up.
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   946
  // Should *not* be called from parallel code.
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   947
  inline bool mark_and_count(oop obj);
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   948
14740
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   949
  // Returns true if initialization was successfully completed.
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   950
  bool completed_initialization() const {
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   951
    return _completed_initialization;
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   952
  }
1431ef92fed1 8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents: 14073
diff changeset
   953
11583
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   954
protected:
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   955
  // Clear all the per-task bitmaps and arrays used to store the
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   956
  // counting data.
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   957
  void clear_all_count_data();
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   958
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   959
  // Aggregates the counting data for each worker/task
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   960
  // that was constructed while marking. Also sets
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   961
  // the amount of marked bytes for each region and
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   962
  // the top at concurrent mark count.
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   963
  void aggregate_count_data();
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   964
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   965
  // Verification routine
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
   966
  void verify_count_data();
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   967
};
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   968
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   969
// A class representing a marking task.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   970
class CMTask : public TerminatorTerminator {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   971
private:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   972
  enum PrivateConstants {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   973
    // the regular clock call is called once the scanned words reaches
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   974
    // this limit
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   975
    words_scanned_period          = 12*1024,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   976
    // the regular clock call is called once the number of visited
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   977
    // references reaches this limit
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   978
    refs_reached_period           = 384,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   979
    // initial value for the hash seed, used in the work stealing code
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   980
    init_hash_seed                = 17,
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   981
    // how many entries will be transferred between global stack and
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   982
    // local queues
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   983
    global_stack_transfer_size    = 16
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   984
  };
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   985
14073
6012178c0c19 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 13919
diff changeset
   986
  uint                        _worker_id;
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   987
  G1CollectedHeap*            _g1h;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   988
  ConcurrentMark*             _cm;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   989
  CMBitMap*                   _nextMarkBitMap;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   990
  // the task queue of this task
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   991
  CMTaskQueue*                _task_queue;
3262
30d1c247fc25 6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents: 2105
diff changeset
   992
private:
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   993
  // the task queue set---needed for stealing
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   994
  CMTaskQueueSet*             _task_queues;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   995
  // indicates whether the task has been claimed---this is only  for
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   996
  // debugging purposes
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   997
  bool                        _claimed;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   998
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
   999
  // number of calls to this task
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1000
  int                         _calls;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1001
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1002
  // when the virtual timer reaches this time, the marking step should
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1003
  // exit
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1004
  double                      _time_target_ms;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1005
  // the start time of the current marking step
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1006
  double                      _start_time_ms;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1007
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1008
  // the oop closure used for iterations over oops
9994
efb74fdbd46e 7046558: G1: concurrent marking optimizations
tonyp
parents: 9936
diff changeset
  1009
  G1CMOopClosure*             _cm_oop_closure;
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1010
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1011
  // the region this task is scanning, NULL if we're not scanning any
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1012
  HeapRegion*                 _curr_region;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1013
  // the local finger of this task, NULL if we're not scanning a region
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1014
  HeapWord*                   _finger;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1015
  // limit of the region this task is scanning, NULL if we're not scanning one
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1016
  HeapWord*                   _region_limit;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1017
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1018
  // the number of words this task has scanned
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1019
  size_t                      _words_scanned;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1020
  // When _words_scanned reaches this limit, the regular clock is
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1021
  // called. Notice that this might be decreased under certain
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1022
  // circumstances (i.e. when we believe that we did an expensive
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1023
  // operation).
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1024
  size_t                      _words_scanned_limit;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1025
  // the initial value of _words_scanned_limit (i.e. what it was
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1026
  // before it was decreased).
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1027
  size_t                      _real_words_scanned_limit;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1028
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1029
  // the number of references this task has visited
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1030
  size_t                      _refs_reached;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1031
  // When _refs_reached reaches this limit, the regular clock is
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1032
  // called. Notice this this might be decreased under certain
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1033
  // circumstances (i.e. when we believe that we did an expensive
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1034
  // operation).
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1035
  size_t                      _refs_reached_limit;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1036
  // the initial value of _refs_reached_limit (i.e. what it was before
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1037
  // it was decreased).
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1038
  size_t                      _real_refs_reached_limit;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1039
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1040
  // used by the work stealing stuff
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1041
  int                         _hash_seed;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1042
  // if this is true, then the task has aborted for some reason
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1043
  bool                        _has_aborted;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1044
  // set when the task aborts because it has met its time quota
8073
a14dc27842dc 6608385: G1: need to support parallel reference processing
johnc
parents: 7923
diff changeset
  1045
  bool                        _has_timed_out;
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1046
  // true when we're draining SATB buffers; this avoids the task
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1047
  // aborting due to SATB buffers being available (as we're already
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1048
  // dealing with them)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1049
  bool                        _draining_satb_buffers;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1050
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1051
  // number sequence of past step times
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1052
  NumberSeq                   _step_times_ms;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1053
  // elapsed time of this task
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1054
  double                      _elapsed_time_ms;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1055
  // termination time of this task
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1056
  double                      _termination_time_ms;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1057
  // when this task got into the termination protocol
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1058
  double                      _termination_start_time_ms;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1059
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1060
  // true when the task is during a concurrent phase, false when it is
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1061
  // in the remark phase (so, in the latter case, we do not have to
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1062
  // check all the things that we have to check during the concurrent
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1063
  // phase, i.e. SATB buffer availability...)
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1064
  bool                        _concurrent;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1065
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1066
  TruncatedSeq                _marking_step_diffs_ms;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1067
11583
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
  1068
  // Counting data structures. Embedding the task's marked_bytes_array
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
  1069
  // and card bitmap into the actual task saves having to go through
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
  1070
  // the ConcurrentMark object.
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
  1071
  size_t*                     _marked_bytes_array;
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
  1072
  BitMap*                     _card_bm;
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
  1073
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1074
  // LOTS of statistics related with this task
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1075
#if _MARKING_STATS_
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1076
  NumberSeq                   _all_clock_intervals_ms;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1077
  double                      _interval_start_time_ms;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1078
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1079
  int                         _aborted;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1080
  int                         _aborted_overflow;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1081
  int                         _aborted_cm_aborted;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1082
  int                         _aborted_yield;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1083
  int                         _aborted_timed_out;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1084
  int                         _aborted_satb;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1085
  int                         _aborted_termination;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1086
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1087
  int                         _steal_attempts;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1088
  int                         _steals;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1089
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1090
  int                         _clock_due_to_marking;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1091
  int                         _clock_due_to_scanning;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1092
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1093
  int                         _local_pushes;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1094
  int                         _local_pops;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1095
  int                         _local_max_size;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1096
  int                         _objs_scanned;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1097
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1098
  int                         _global_pushes;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1099
  int                         _global_pops;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1100
  int                         _global_max_size;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1101
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1102
  int                         _global_transfers_to;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1103
  int                         _global_transfers_from;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1104
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1105
  int                         _regions_claimed;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1106
  int                         _objs_found_on_bitmap;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1107
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1108
  int                         _satb_buffers_processed;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1109
#endif // _MARKING_STATS_
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1110
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1111
  // it updates the local fields after this task has claimed
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1112
  // a new region to scan
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1113
  void setup_for_region(HeapRegion* hr);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1114
  // it brings up-to-date the limit of the region
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1115
  void update_region_limit();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1116
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1117
  // called when either the words scanned or the refs visited limit
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1118
  // has been reached
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1119
  void reached_limit();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1120
  // recalculates the words scanned and refs visited limits
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1121
  void recalculate_limits();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1122
  // decreases the words scanned and refs visited limits when we reach
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1123
  // an expensive operation
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1124
  void decrease_limits();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1125
  // it checks whether the words scanned or refs visited reached their
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1126
  // respective limit and calls reached_limit() if they have
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1127
  void check_limits() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1128
    if (_words_scanned >= _words_scanned_limit ||
9999
5f0b78217054 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 9995
diff changeset
  1129
        _refs_reached >= _refs_reached_limit) {
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1130
      reached_limit();
9999
5f0b78217054 7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents: 9995
diff changeset
  1131
    }
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1132
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1133
  // this is supposed to be called regularly during a marking step as
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1134
  // it checks a bunch of conditions that might cause the marking step
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1135
  // to abort
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1136
  void regular_clock_call();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1137
  bool concurrent() { return _concurrent; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1138
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1139
public:
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1140
  // It resets the task; it should be called right at the beginning of
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1141
  // a marking phase.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1142
  void reset(CMBitMap* _nextMarkBitMap);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1143
  // it clears all the fields that correspond to a claimed region.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1144
  void clear_region_fields();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1145
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1146
  void set_concurrent(bool concurrent) { _concurrent = concurrent; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1147
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1148
  // The main method of this class which performs a marking step
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1149
  // trying not to exceed the given duration. However, it might exit
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1150
  // prematurely, according to some conditions (i.e. SATB buffers are
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1151
  // available for processing).
16388
60de0264afe8 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 15949
diff changeset
  1152
  void do_marking_step(double target_ms,
60de0264afe8 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 15949
diff changeset
  1153
                       bool do_termination,
60de0264afe8 8009536: G1: Apache Lucene hang during reference processing
johnc
parents: 15949
diff changeset
  1154
                       bool is_serial);
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1155
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1156
  // These two calls start and stop the timer
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1157
  void record_start_time() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1158
    _elapsed_time_ms = os::elapsedTime() * 1000.0;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1159
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1160
  void record_end_time() {
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1161
    _elapsed_time_ms = os::elapsedTime() * 1000.0 - _elapsed_time_ms;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1162
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1163
14073
6012178c0c19 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 13919
diff changeset
  1164
  // returns the worker ID associated with this task.
6012178c0c19 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 13919
diff changeset
  1165
  uint worker_id() { return _worker_id; }
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1166
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1167
  // From TerminatorTerminator. It determines whether this task should
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1168
  // exit the termination protocol after it's entered it.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1169
  virtual bool should_exit_termination();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1170
9936
59dac2950cc7 7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents: 9417
diff changeset
  1171
  // Resets the local region fields after a task has finished scanning a
59dac2950cc7 7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents: 9417
diff changeset
  1172
  // region; or when they have become stale as a result of the region
59dac2950cc7 7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents: 9417
diff changeset
  1173
  // being evacuated.
59dac2950cc7 7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents: 9417
diff changeset
  1174
  void giveup_current_region();
59dac2950cc7 7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents: 9417
diff changeset
  1175
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1176
  HeapWord* finger()            { return _finger; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1177
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1178
  bool has_aborted()            { return _has_aborted; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1179
  void set_has_aborted()        { _has_aborted = true; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1180
  void clear_has_aborted()      { _has_aborted = false; }
8073
a14dc27842dc 6608385: G1: need to support parallel reference processing
johnc
parents: 7923
diff changeset
  1181
  bool has_timed_out()          { return _has_timed_out; }
a14dc27842dc 6608385: G1: need to support parallel reference processing
johnc
parents: 7923
diff changeset
  1182
  bool claimed()                { return _claimed; }
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1183
9994
efb74fdbd46e 7046558: G1: concurrent marking optimizations
tonyp
parents: 9936
diff changeset
  1184
  void set_cm_oop_closure(G1CMOopClosure* cm_oop_closure);
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1185
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1186
  // It grays the object by marking it and, if necessary, pushing it
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1187
  // on the local queue
9994
efb74fdbd46e 7046558: G1: concurrent marking optimizations
tonyp
parents: 9936
diff changeset
  1188
  inline void deal_with_reference(oop obj);
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1189
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1190
  // It scans an object and visits its children.
9994
efb74fdbd46e 7046558: G1: concurrent marking optimizations
tonyp
parents: 9936
diff changeset
  1191
  void scan_object(oop obj);
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1192
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1193
  // It pushes an object on the local queue.
9994
efb74fdbd46e 7046558: G1: concurrent marking optimizations
tonyp
parents: 9936
diff changeset
  1194
  inline void push(oop obj);
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1195
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1196
  // These two move entries to/from the global stack.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1197
  void move_entries_to_global_stack();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1198
  void get_entries_from_global_stack();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1199
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1200
  // It pops and scans objects from the local queue. If partially is
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1201
  // true, then it stops when the queue size is of a given limit. If
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1202
  // partially is false, then it stops when the queue is empty.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1203
  void drain_local_queue(bool partially);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1204
  // It moves entries from the global stack to the local queue and
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1205
  // drains the local queue. If partially is true, then it stops when
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1206
  // both the global stack and the local queue reach a given size. If
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1207
  // partially if false, it tries to empty them totally.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1208
  void drain_global_stack(bool partially);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1209
  // It keeps picking SATB buffers and processing them until no SATB
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1210
  // buffers are available.
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1211
  void drain_satb_buffers();
11455
a6ab3d8b9a4c 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents: 11396
diff changeset
  1212
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1213
  // moves the local finger to a new location
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1214
  inline void move_finger_to(HeapWord* new_finger) {
4026
10386ea70fe5 6888619: G1: too many guarantees in concurrent marking
tonyp
parents: 4022
diff changeset
  1215
    assert(new_finger >= _finger && new_finger < _region_limit, "invariant");
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1216
    _finger = new_finger;
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1217
  }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1218
14073
6012178c0c19 7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents: 13919
diff changeset
  1219
  CMTask(uint worker_id, ConcurrentMark *cm,
11583
83a7383de44c 6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents: 11575
diff changeset
  1220
         size_t* marked_bytes, BitMap* card_bm,
1374
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1221
         CMTaskQueue* task_queue, CMTaskQueueSet* task_queues);
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1222
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1223
  // it prints statistics associated with this task
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1224
  void print_stats();
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1225
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1226
#if _MARKING_STATS_
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1227
  void increase_objs_found_on_bitmap() { ++_objs_found_on_bitmap; }
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1228
#endif // _MARKING_STATS_
4c24294029a9 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
  1229
};
7397
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 6761
diff changeset
  1230
8930
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1231
// Class that's used to to print out per-region liveness
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1232
// information. It's currently used at the end of marking and also
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1233
// after we sort the old regions at the end of the cleanup operation.
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1234
class G1PrintRegionLivenessInfoClosure: public HeapRegionClosure {
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1235
private:
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1236
  outputStream* _out;
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1237
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1238
  // Accumulators for these values.
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1239
  size_t _total_used_bytes;
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1240
  size_t _total_capacity_bytes;
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1241
  size_t _total_prev_live_bytes;
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1242
  size_t _total_next_live_bytes;
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1243
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1244
  // These are set up when we come across a "stars humongous" region
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1245
  // (as this is where most of this information is stored, not in the
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1246
  // subsequent "continues humongous" regions). After that, for every
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1247
  // region in a given humongous region series we deduce the right
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1248
  // values for it by simply subtracting the appropriate amount from
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1249
  // these fields. All these values should reach 0 after we've visited
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1250
  // the last region in the series.
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1251
  size_t _hum_used_bytes;
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1252
  size_t _hum_capacity_bytes;
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1253
  size_t _hum_prev_live_bytes;
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1254
  size_t _hum_next_live_bytes;
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1255
17395
2cd3ef1be718 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents: 16685
diff changeset
  1256
  // Accumulator for the remembered set size
2cd3ef1be718 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents: 16685
diff changeset
  1257
  size_t _total_remset_bytes;
2cd3ef1be718 8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents: 16685
diff changeset
  1258
19339
d247781beec7 7145569: G1: optimize nmethods scanning
johnc
parents: 18025
diff changeset
  1259
  // Accumulator for strong code roots memory size
d247781beec7 7145569: G1: optimize nmethods scanning
johnc
parents: 18025
diff changeset
  1260
  size_t _total_strong_code_roots_bytes;
d247781beec7 7145569: G1: optimize nmethods scanning
johnc
parents: 18025
diff changeset
  1261
8930
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1262
  static double perc(size_t val, size_t total) {
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1263
    if (total == 0) {
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1264
      return 0.0;
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1265
    } else {
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1266
      return 100.0 * ((double) val / (double) total);
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1267
    }
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1268
  }
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1269
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1270
  static double bytes_to_mb(size_t val) {
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1271
    return (double) val / (double) M;
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1272
  }
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1273
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1274
  // See the .cpp file.
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1275
  size_t get_hum_bytes(size_t* hum_bytes);
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1276
  void get_hum_bytes(size_t* used_bytes, size_t* capacity_bytes,
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1277
                     size_t* prev_live_bytes, size_t* next_live_bytes);
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1278
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1279
public:
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1280
  // The header and footer are printed in the constructor and
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1281
  // destructor respectively.
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1282
  G1PrintRegionLivenessInfoClosure(outputStream* out, const char* phase_name);
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1283
  virtual bool doHeapRegion(HeapRegion* r);
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1284
  ~G1PrintRegionLivenessInfoClosure();
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1285
};
52368505ee8e 7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents: 8073
diff changeset
  1286
7397
5b173b4ca846 6989984: Use standard include model for Hospot
stefank
parents: 6761
diff changeset
  1287
#endif // SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTMARK_HPP