Mercurial > hg > graal-jvmci-8
annotate src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.cpp @ 2149:7e37af9d69ef
7011379: G1: overly long concurrent marking cycles
Summary: This changeset introduces filtering of SATB buffers at the point when they are about to be enqueued. If this filtering clears enough entries on each buffer, the buffer can then be re-used and not enqueued. This cuts down the number of SATB buffers that need to be processed by the concurrent marking threads.
Reviewed-by: johnc, ysr
| author | tonyp |
|---|---|
| date | Wed, 19 Jan 2011 09:35:17 -0500 |
| parents | f95d63e2154a |
| children | e1162778c1c8 |
| rev | line source |
|---|---|
| 342 | 1 /* |
| 1972 | 2 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. |
| 342 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 342 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" | |
| 27 #include "gc_implementation/g1/heapRegion.hpp" | |
| 28 #include "gc_implementation/g1/satbQueue.hpp" | |
| 29 #include "runtime/mutexLocker.hpp" | |
| 30 #include "runtime/thread.hpp" | |
| 31 #ifdef TARGET_OS_FAMILY_linux | |
| 32 # include "thread_linux.inline.hpp" | |
| 33 #endif | |
| 34 #ifdef TARGET_OS_FAMILY_solaris | |
| 35 # include "thread_solaris.inline.hpp" | |
| 36 #endif | |
| 37 #ifdef TARGET_OS_FAMILY_windows | |
| 38 # include "thread_windows.inline.hpp" | |
| 39 #endif | |
| 342 | 40 |
| 41 G1SATBCardTableModRefBS::G1SATBCardTableModRefBS(MemRegion whole_heap, | |
| 42 int max_covered_regions) : | |
| 43 CardTableModRefBSForCTRS(whole_heap, max_covered_regions) | |
| 44 { | |
| 45 _kind = G1SATBCT; | |
| 46 } | |
| 47 | |
| 48 | |
| 49 void G1SATBCardTableModRefBS::enqueue(oop pre_val) { | |
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50 assert(pre_val->is_oop_or_null(true), "Error"); |
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51 if (!JavaThread::satb_mark_queue_set().is_active()) return; |
| 342 | 52 Thread* thr = Thread::current(); |
| 53 if (thr->is_Java_thread()) { | |
| 54 JavaThread* jt = (JavaThread*)thr; | |
| 55 jt->satb_mark_queue().enqueue(pre_val); | |
| 56 } else { | |
| 57 MutexLocker x(Shared_SATB_Q_lock); | |
| 58 JavaThread::satb_mark_queue_set().shared_satb_queue()->enqueue(pre_val); | |
| 59 } | |
| 60 } | |
| 61 | |
| 62 // When we know the current java thread: | |
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63 template <class T> void |
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64 G1SATBCardTableModRefBS::write_ref_field_pre_static(T* field, |
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65 oop new_val, |
| 342 | 66 JavaThread* jt) { |
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67 if (!JavaThread::satb_mark_queue_set().is_active()) return; |
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68 T heap_oop = oopDesc::load_heap_oop(field); |
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69 if (!oopDesc::is_null(heap_oop)) { |
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70 oop pre_val = oopDesc::decode_heap_oop_not_null(heap_oop); |
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71 assert(pre_val->is_oop(true /* ignore mark word */), "Error"); |
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72 jt->satb_mark_queue().enqueue(pre_val); |
| 342 | 73 } |
| 74 } | |
| 75 | |
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76 template <class T> void |
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77 G1SATBCardTableModRefBS::write_ref_array_pre_work(T* dst, int count) { |
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78 if (!JavaThread::satb_mark_queue_set().is_active()) return; |
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79 T* elem_ptr = dst; |
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80 for (int i = 0; i < count; i++, elem_ptr++) { |
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81 T heap_oop = oopDesc::load_heap_oop(elem_ptr); |
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82 if (!oopDesc::is_null(heap_oop)) { |
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83 enqueue(oopDesc::decode_heap_oop_not_null(heap_oop)); |
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84 } |
| 342 | 85 } |
| 86 } | |
| 87 | |
| 88 G1SATBCardTableLoggingModRefBS:: | |
| 89 G1SATBCardTableLoggingModRefBS(MemRegion whole_heap, | |
| 90 int max_covered_regions) : | |
| 91 G1SATBCardTableModRefBS(whole_heap, max_covered_regions), | |
| 92 _dcqs(JavaThread::dirty_card_queue_set()) | |
| 93 { | |
| 94 _kind = G1SATBCTLogging; | |
| 95 } | |
| 96 | |
| 97 void | |
| 98 G1SATBCardTableLoggingModRefBS::write_ref_field_work(void* field, | |
| 99 oop new_val) { | |
| 100 jbyte* byte = byte_for(field); | |
| 101 if (*byte != dirty_card) { | |
| 102 *byte = dirty_card; | |
| 103 Thread* thr = Thread::current(); | |
| 104 if (thr->is_Java_thread()) { | |
| 105 JavaThread* jt = (JavaThread*)thr; | |
| 106 jt->dirty_card_queue().enqueue(byte); | |
| 107 } else { | |
| 108 MutexLockerEx x(Shared_DirtyCardQ_lock, | |
| 109 Mutex::_no_safepoint_check_flag); | |
| 110 _dcqs.shared_dirty_card_queue()->enqueue(byte); | |
| 111 } | |
| 112 } | |
| 113 } | |
| 114 | |
| 115 void | |
| 116 G1SATBCardTableLoggingModRefBS::write_ref_field_static(void* field, | |
| 117 oop new_val) { | |
| 118 uintptr_t field_uint = (uintptr_t)field; | |
| 119 uintptr_t new_val_uint = (uintptr_t)new_val; | |
| 120 uintptr_t comb = field_uint ^ new_val_uint; | |
| 121 comb = comb >> HeapRegion::LogOfHRGrainBytes; | |
| 122 if (comb == 0) return; | |
| 123 if (new_val == NULL) return; | |
| 124 // Otherwise, log it. | |
| 125 G1SATBCardTableLoggingModRefBS* g1_bs = | |
| 126 (G1SATBCardTableLoggingModRefBS*)Universe::heap()->barrier_set(); | |
| 127 g1_bs->write_ref_field_work(field, new_val); | |
| 128 } | |
| 129 | |
| 130 void | |
| 131 G1SATBCardTableLoggingModRefBS::invalidate(MemRegion mr, bool whole_heap) { | |
| 132 jbyte* byte = byte_for(mr.start()); | |
| 133 jbyte* last_byte = byte_for(mr.last()); | |
| 134 Thread* thr = Thread::current(); | |
| 135 if (whole_heap) { | |
| 136 while (byte <= last_byte) { | |
| 137 *byte = dirty_card; | |
| 138 byte++; | |
| 139 } | |
| 140 } else { | |
| 141 // Enqueue if necessary. | |
| 142 if (thr->is_Java_thread()) { | |
| 143 JavaThread* jt = (JavaThread*)thr; | |
| 144 while (byte <= last_byte) { | |
| 145 if (*byte != dirty_card) { | |
| 146 *byte = dirty_card; | |
| 147 jt->dirty_card_queue().enqueue(byte); | |
| 148 } | |
| 149 byte++; | |
| 150 } | |
| 151 } else { | |
| 152 MutexLockerEx x(Shared_DirtyCardQ_lock, | |
| 153 Mutex::_no_safepoint_check_flag); | |
| 154 while (byte <= last_byte) { | |
| 155 if (*byte != dirty_card) { | |
| 156 *byte = dirty_card; | |
| 157 _dcqs.shared_dirty_card_queue()->enqueue(byte); | |
| 158 } | |
| 159 byte++; | |
| 160 } | |
| 161 } | |
| 162 } | |
| 163 } |