Mercurial > hg > graal-jvmci-8
annotate src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.cpp @ 6611:7383557659bd
7185699: G1: Prediction model discrepancies
Summary: Correct the result value of G1CollectedHeap::pending_card_num(). Change the code that calculates the GC efficiency of a non-young heap region to use historical data from mixed GCs and the actual number of live bytes when predicting how long it would take to collect the region. Changes were also reviewed by Thomas Schatzl.
Reviewed-by: azeemj, brutisso
author | johnc |
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date | Tue, 21 Aug 2012 14:10:39 -0700 |
parents | f08d439fab8c |
children | f34d701e952e |
rev | line source |
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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 | |
3960 | 40 #ifdef TARGET_OS_FAMILY_bsd |
41 # include "thread_bsd.inline.hpp" | |
42 #endif | |
342 | 43 |
44 G1SATBCardTableModRefBS::G1SATBCardTableModRefBS(MemRegion whole_heap, | |
45 int max_covered_regions) : | |
46 CardTableModRefBSForCTRS(whole_heap, max_covered_regions) | |
47 { | |
48 _kind = G1SATBCT; | |
49 } | |
50 | |
51 | |
52 void G1SATBCardTableModRefBS::enqueue(oop pre_val) { | |
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53 // Nulls should have been already filtered. |
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54 assert(pre_val->is_oop(true), "Error"); |
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55 |
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56 if (!JavaThread::satb_mark_queue_set().is_active()) return; |
342 | 57 Thread* thr = Thread::current(); |
58 if (thr->is_Java_thread()) { | |
59 JavaThread* jt = (JavaThread*)thr; | |
60 jt->satb_mark_queue().enqueue(pre_val); | |
61 } else { | |
62 MutexLocker x(Shared_SATB_Q_lock); | |
63 JavaThread::satb_mark_queue_set().shared_satb_queue()->enqueue(pre_val); | |
64 } | |
65 } | |
66 | |
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67 template <class T> void |
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68 G1SATBCardTableModRefBS::write_ref_array_pre_work(T* dst, int count) { |
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69 if (!JavaThread::satb_mark_queue_set().is_active()) return; |
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70 T* elem_ptr = dst; |
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71 for (int i = 0; i < count; i++, elem_ptr++) { |
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72 T heap_oop = oopDesc::load_heap_oop(elem_ptr); |
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73 if (!oopDesc::is_null(heap_oop)) { |
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74 enqueue(oopDesc::decode_heap_oop_not_null(heap_oop)); |
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75 } |
342 | 76 } |
77 } | |
78 | |
79 G1SATBCardTableLoggingModRefBS:: | |
80 G1SATBCardTableLoggingModRefBS(MemRegion whole_heap, | |
81 int max_covered_regions) : | |
82 G1SATBCardTableModRefBS(whole_heap, max_covered_regions), | |
83 _dcqs(JavaThread::dirty_card_queue_set()) | |
84 { | |
85 _kind = G1SATBCTLogging; | |
86 } | |
87 | |
88 void | |
89 G1SATBCardTableLoggingModRefBS::write_ref_field_work(void* field, | |
90 oop new_val) { | |
91 jbyte* byte = byte_for(field); | |
92 if (*byte != dirty_card) { | |
93 *byte = dirty_card; | |
94 Thread* thr = Thread::current(); | |
95 if (thr->is_Java_thread()) { | |
96 JavaThread* jt = (JavaThread*)thr; | |
97 jt->dirty_card_queue().enqueue(byte); | |
98 } else { | |
99 MutexLockerEx x(Shared_DirtyCardQ_lock, | |
100 Mutex::_no_safepoint_check_flag); | |
101 _dcqs.shared_dirty_card_queue()->enqueue(byte); | |
102 } | |
103 } | |
104 } | |
105 | |
106 void | |
107 G1SATBCardTableLoggingModRefBS::write_ref_field_static(void* field, | |
108 oop new_val) { | |
109 uintptr_t field_uint = (uintptr_t)field; | |
110 uintptr_t new_val_uint = (uintptr_t)new_val; | |
111 uintptr_t comb = field_uint ^ new_val_uint; | |
112 comb = comb >> HeapRegion::LogOfHRGrainBytes; | |
113 if (comb == 0) return; | |
114 if (new_val == NULL) return; | |
115 // Otherwise, log it. | |
116 G1SATBCardTableLoggingModRefBS* g1_bs = | |
117 (G1SATBCardTableLoggingModRefBS*)Universe::heap()->barrier_set(); | |
118 g1_bs->write_ref_field_work(field, new_val); | |
119 } | |
120 | |
121 void | |
122 G1SATBCardTableLoggingModRefBS::invalidate(MemRegion mr, bool whole_heap) { | |
123 jbyte* byte = byte_for(mr.start()); | |
124 jbyte* last_byte = byte_for(mr.last()); | |
125 Thread* thr = Thread::current(); | |
126 if (whole_heap) { | |
127 while (byte <= last_byte) { | |
128 *byte = dirty_card; | |
129 byte++; | |
130 } | |
131 } else { | |
132 // Enqueue if necessary. | |
133 if (thr->is_Java_thread()) { | |
134 JavaThread* jt = (JavaThread*)thr; | |
135 while (byte <= last_byte) { | |
136 if (*byte != dirty_card) { | |
137 *byte = dirty_card; | |
138 jt->dirty_card_queue().enqueue(byte); | |
139 } | |
140 byte++; | |
141 } | |
142 } else { | |
143 MutexLockerEx x(Shared_DirtyCardQ_lock, | |
144 Mutex::_no_safepoint_check_flag); | |
145 while (byte <= last_byte) { | |
146 if (*byte != dirty_card) { | |
147 *byte = dirty_card; | |
148 _dcqs.shared_dirty_card_queue()->enqueue(byte); | |
149 } | |
150 byte++; | |
151 } | |
152 } | |
153 } | |
154 } |