Mercurial > hg > truffle
annotate src/share/vm/services/memRecorder.cpp @ 8733:9def4075da6d
8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord
Summary: Update the task local finger to the start of the next object when marking aborts, in order to avoid the redundant scanning of all 0's when the marking task restarts, if otherwise updating to the next word. In addition, reuse the routine nextObject() in routine iterate().
Reviewed-by: johnc, ysr
Contributed-by: tamao <tao.mao@oracle.com>
| author | tamao |
|---|---|
| date | Tue, 05 Mar 2013 15:36:56 -0800 |
| parents | 4102b59539ce |
| children | 1f4355cee9a2 |
| rev | line source |
|---|---|
| 6197 | 1 /* |
| 2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #include "precompiled.hpp" | |
| 26 | |
| 27 #include "runtime/atomic.hpp" | |
| 28 #include "services/memBaseline.hpp" | |
| 29 #include "services/memRecorder.hpp" | |
| 30 #include "services/memPtr.hpp" | |
| 31 #include "services/memTracker.hpp" | |
| 32 | |
| 33 MemPointer* SequencedRecordIterator::next_record() { | |
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34 MemPointerRecord* itr_cur = (MemPointerRecord*)_itr.current(); |
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35 if (itr_cur == NULL) { |
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36 return itr_cur; |
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37 } |
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38 |
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39 MemPointerRecord* itr_next = (MemPointerRecord*)_itr.next(); |
| 6197 | 40 |
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41 // don't collapse virtual memory records |
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42 while (itr_next != NULL && !itr_cur->is_vm_pointer() && |
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43 !itr_next->is_vm_pointer() && |
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44 same_kind(itr_cur, itr_next)) { |
| 6197 | 45 itr_cur = itr_next; |
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46 itr_next = (MemPointerRecord*)_itr.next(); |
| 6197 | 47 } |
| 48 | |
| 49 return itr_cur; | |
| 50 } | |
| 51 | |
| 52 | |
| 6231 | 53 volatile jint MemRecorder::_instance_count = 0; |
| 6197 | 54 |
| 55 MemRecorder::MemRecorder() { | |
| 56 assert(MemTracker::is_on(), "Native memory tracking is off"); | |
| 6231 | 57 Atomic::inc(&_instance_count); |
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58 set_generation(); |
| 6197 | 59 |
| 60 if (MemTracker::track_callsite()) { | |
| 61 _pointer_records = new (std::nothrow)FixedSizeMemPointerArray<SeqMemPointerRecordEx, | |
| 62 DEFAULT_RECORDER_PTR_ARRAY_SIZE>(); | |
| 63 } else { | |
| 64 _pointer_records = new (std::nothrow)FixedSizeMemPointerArray<SeqMemPointerRecord, | |
| 65 DEFAULT_RECORDER_PTR_ARRAY_SIZE>(); | |
| 66 } | |
| 67 _next = NULL; | |
| 68 | |
| 69 | |
| 70 if (_pointer_records != NULL) { | |
| 71 // recode itself | |
| 72 record((address)this, (MemPointerRecord::malloc_tag()|mtNMT|otNMTRecorder), | |
| 73 sizeof(MemRecorder), CALLER_PC); | |
| 74 record((address)_pointer_records, (MemPointerRecord::malloc_tag()|mtNMT|otNMTRecorder), | |
| 75 _pointer_records->instance_size(),CURRENT_PC); | |
| 76 } | |
| 77 } | |
| 78 | |
| 79 MemRecorder::~MemRecorder() { | |
| 80 if (_pointer_records != NULL) { | |
| 81 if (MemTracker::is_on()) { | |
| 82 MemTracker::record_free((address)_pointer_records, mtNMT); | |
| 83 MemTracker::record_free((address)this, mtNMT); | |
| 84 } | |
| 85 delete _pointer_records; | |
| 86 } | |
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87 // delete all linked recorders |
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88 while (_next != NULL) { |
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89 MemRecorder* tmp = _next; |
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90 _next = _next->next(); |
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91 tmp->set_next(NULL); |
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92 delete tmp; |
| 6197 | 93 } |
| 94 Atomic::dec(&_instance_count); | |
| 95 } | |
| 96 | |
| 97 // Sorting order: | |
| 98 // 1. memory block address | |
| 99 // 2. mem pointer record tags | |
| 100 // 3. sequence number | |
| 101 int MemRecorder::sort_record_fn(const void* e1, const void* e2) { | |
| 102 const MemPointerRecord* p1 = (const MemPointerRecord*)e1; | |
| 103 const MemPointerRecord* p2 = (const MemPointerRecord*)e2; | |
| 104 int delta = UNSIGNED_COMPARE(p1->addr(), p2->addr()); | |
| 105 if (delta == 0) { | |
| 106 int df = UNSIGNED_COMPARE((p1->flags() & MemPointerRecord::tag_masks), | |
| 107 (p2->flags() & MemPointerRecord::tag_masks)); | |
| 108 if (df == 0) { | |
| 109 assert(p1->seq() != p2->seq(), "dup seq"); | |
| 110 return p1->seq() - p2->seq(); | |
| 111 } else { | |
| 112 return df; | |
| 113 } | |
| 114 } else { | |
| 115 return delta; | |
| 116 } | |
| 117 } | |
| 118 | |
| 119 bool MemRecorder::record(address p, MEMFLAGS flags, size_t size, address pc) { | |
| 120 #ifdef ASSERT | |
| 121 if (MemPointerRecord::is_virtual_memory_record(flags)) { | |
| 122 assert((flags & MemPointerRecord::tag_masks) != 0, "bad virtual memory record"); | |
| 123 } else { | |
| 124 assert((flags & MemPointerRecord::tag_masks) == MemPointerRecord::malloc_tag() || | |
| 125 (flags & MemPointerRecord::tag_masks) == MemPointerRecord::free_tag() || | |
| 126 IS_ARENA_OBJ(flags), | |
| 127 "bad malloc record"); | |
| 128 } | |
| 129 // a recorder should only hold records within the same generation | |
| 130 unsigned long cur_generation = SequenceGenerator::current_generation(); | |
| 131 assert(cur_generation == _generation, | |
| 132 "this thread did not enter sync point"); | |
| 133 #endif | |
| 134 | |
| 135 if (MemTracker::track_callsite()) { | |
| 136 SeqMemPointerRecordEx ap(p, flags, size, pc); | |
| 137 debug_only(check_dup_seq(ap.seq());) | |
| 138 return _pointer_records->append(&ap); | |
| 139 } else { | |
| 140 SeqMemPointerRecord ap(p, flags, size); | |
| 141 debug_only(check_dup_seq(ap.seq());) | |
| 142 return _pointer_records->append(&ap); | |
| 143 } | |
| 144 } | |
| 145 | |
| 146 // iterator for alloc pointers | |
| 147 SequencedRecordIterator MemRecorder::pointer_itr() { | |
| 148 assert(_pointer_records != NULL, "just check"); | |
| 149 _pointer_records->sort((FN_SORT)sort_record_fn); | |
| 150 return SequencedRecordIterator(_pointer_records); | |
| 151 } | |
| 152 | |
| 153 | |
| 154 void MemRecorder::set_generation() { | |
| 155 _generation = SequenceGenerator::current_generation(); | |
| 156 } | |
| 157 | |
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158 #ifdef ASSERT |
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159 |
| 6197 | 160 void MemRecorder::check_dup_seq(jint seq) const { |
| 161 MemPointerArrayIteratorImpl itr(_pointer_records); | |
| 162 MemPointerRecord* rc = (MemPointerRecord*)itr.current(); | |
| 163 while (rc != NULL) { | |
| 164 assert(rc->seq() != seq, "dup seq"); | |
| 165 rc = (MemPointerRecord*)itr.next(); | |
| 166 } | |
| 167 } | |
| 168 | |
| 169 #endif |