Mercurial > hg > graal-jvmci-8
annotate src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.cpp @ 3285:49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
Summary: It introduces non-product cmd line parameter G1DummyRegionsPerGC which indicates how many "dummy" regions to allocate at the end of each GC. This allows the G1 heap to grow artificially and makes concurrent marking cycles more frequent irrespective of what the application that is running is doing. The dummy regions will be found totally empty during cleanup so this parameter can also be used to stress the concurrent cleanup operation.
Reviewed-by: brutisso, johnc
| author | tonyp |
|---|---|
| date | Tue, 19 Apr 2011 15:46:59 -0400 |
| parents | e1162778c1c8 |
| children | f08d439fab8c |
| rev | line source |
|---|---|
| 342 | 1 /* |
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2 * Copyright (c) 2001, 2011, 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 // Nulls should have been already filtered. |
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51 assert(pre_val->is_oop(true), "Error"); |
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52 |
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53 if (!JavaThread::satb_mark_queue_set().is_active()) return; |
| 342 | 54 Thread* thr = Thread::current(); |
| 55 if (thr->is_Java_thread()) { | |
| 56 JavaThread* jt = (JavaThread*)thr; | |
| 57 jt->satb_mark_queue().enqueue(pre_val); | |
| 58 } else { | |
| 59 MutexLocker x(Shared_SATB_Q_lock); | |
| 60 JavaThread::satb_mark_queue_set().shared_satb_queue()->enqueue(pre_val); | |
| 61 } | |
| 62 } | |
| 63 | |
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64 template <class T> void |
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65 G1SATBCardTableModRefBS::write_ref_array_pre_work(T* dst, int count) { |
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66 if (!JavaThread::satb_mark_queue_set().is_active()) return; |
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67 T* elem_ptr = dst; |
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68 for (int i = 0; i < count; i++, elem_ptr++) { |
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69 T heap_oop = oopDesc::load_heap_oop(elem_ptr); |
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70 if (!oopDesc::is_null(heap_oop)) { |
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71 enqueue(oopDesc::decode_heap_oop_not_null(heap_oop)); |
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72 } |
| 342 | 73 } |
| 74 } | |
| 75 | |
| 76 G1SATBCardTableLoggingModRefBS:: | |
| 77 G1SATBCardTableLoggingModRefBS(MemRegion whole_heap, | |
| 78 int max_covered_regions) : | |
| 79 G1SATBCardTableModRefBS(whole_heap, max_covered_regions), | |
| 80 _dcqs(JavaThread::dirty_card_queue_set()) | |
| 81 { | |
| 82 _kind = G1SATBCTLogging; | |
| 83 } | |
| 84 | |
| 85 void | |
| 86 G1SATBCardTableLoggingModRefBS::write_ref_field_work(void* field, | |
| 87 oop new_val) { | |
| 88 jbyte* byte = byte_for(field); | |
| 89 if (*byte != dirty_card) { | |
| 90 *byte = dirty_card; | |
| 91 Thread* thr = Thread::current(); | |
| 92 if (thr->is_Java_thread()) { | |
| 93 JavaThread* jt = (JavaThread*)thr; | |
| 94 jt->dirty_card_queue().enqueue(byte); | |
| 95 } else { | |
| 96 MutexLockerEx x(Shared_DirtyCardQ_lock, | |
| 97 Mutex::_no_safepoint_check_flag); | |
| 98 _dcqs.shared_dirty_card_queue()->enqueue(byte); | |
| 99 } | |
| 100 } | |
| 101 } | |
| 102 | |
| 103 void | |
| 104 G1SATBCardTableLoggingModRefBS::write_ref_field_static(void* field, | |
| 105 oop new_val) { | |
| 106 uintptr_t field_uint = (uintptr_t)field; | |
| 107 uintptr_t new_val_uint = (uintptr_t)new_val; | |
| 108 uintptr_t comb = field_uint ^ new_val_uint; | |
| 109 comb = comb >> HeapRegion::LogOfHRGrainBytes; | |
| 110 if (comb == 0) return; | |
| 111 if (new_val == NULL) return; | |
| 112 // Otherwise, log it. | |
| 113 G1SATBCardTableLoggingModRefBS* g1_bs = | |
| 114 (G1SATBCardTableLoggingModRefBS*)Universe::heap()->barrier_set(); | |
| 115 g1_bs->write_ref_field_work(field, new_val); | |
| 116 } | |
| 117 | |
| 118 void | |
| 119 G1SATBCardTableLoggingModRefBS::invalidate(MemRegion mr, bool whole_heap) { | |
| 120 jbyte* byte = byte_for(mr.start()); | |
| 121 jbyte* last_byte = byte_for(mr.last()); | |
| 122 Thread* thr = Thread::current(); | |
| 123 if (whole_heap) { | |
| 124 while (byte <= last_byte) { | |
| 125 *byte = dirty_card; | |
| 126 byte++; | |
| 127 } | |
| 128 } else { | |
| 129 // Enqueue if necessary. | |
| 130 if (thr->is_Java_thread()) { | |
| 131 JavaThread* jt = (JavaThread*)thr; | |
| 132 while (byte <= last_byte) { | |
| 133 if (*byte != dirty_card) { | |
| 134 *byte = dirty_card; | |
| 135 jt->dirty_card_queue().enqueue(byte); | |
| 136 } | |
| 137 byte++; | |
| 138 } | |
| 139 } else { | |
| 140 MutexLockerEx x(Shared_DirtyCardQ_lock, | |
| 141 Mutex::_no_safepoint_check_flag); | |
| 142 while (byte <= last_byte) { | |
| 143 if (*byte != dirty_card) { | |
| 144 *byte = dirty_card; | |
| 145 _dcqs.shared_dirty_card_queue()->enqueue(byte); | |
| 146 } | |
| 147 byte++; | |
| 148 } | |
| 149 } | |
| 150 } | |
| 151 } |