Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/g1/concurrentG1RefineThread.hpp @ 806:821269eca479
6820167: GCALotAtAllSafepoints + FullGCALot(ScavengeALot) options crash JVM
Summary: Short-circuit gc-a-lot attempts by non-JavaThreads; SkipGCALot c'tor to elide re-entrant gc-a-lot attempts.
Reviewed-by: apetrusenko, jcoomes, jmasa, kamg
author | ysr |
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date | Thu, 11 Jun 2009 12:40:00 -0700 |
parents | 215f81b4d9b3 |
children | bd02caa94611 |
rev | line source |
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342 | 1 /* |
2 * Copyright 2001-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 // Forward Decl. | |
26 class ConcurrentG1Refine; | |
27 | |
28 // The G1 Concurrent Refinement Thread (could be several in the future). | |
29 | |
30 class ConcurrentG1RefineThread: public ConcurrentGCThread { | |
31 friend class VMStructs; | |
32 friend class G1CollectedHeap; | |
33 | |
34 double _vtime_start; // Initial virtual time. | |
35 double _vtime_accum; // Initial virtual time. | |
794 | 36 int _worker_id; |
795
215f81b4d9b3
6841831: G1: assert(contains_reference(from),"We just added it!") fires
iveresov
parents:
794
diff
changeset
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37 int _worker_id_offset; |
342 | 38 |
794 | 39 // The refinement threads collection is linked list. A predecessor can activate a successor |
40 // when the number of the rset update buffer crosses a certain threshold. A successor | |
41 // would self-deactivate when the number of the buffers falls below the threshold. | |
42 bool _active; | |
43 ConcurrentG1RefineThread * _next; | |
342 | 44 public: |
45 virtual void run(); | |
46 | |
794 | 47 bool is_active() { return _active; } |
48 void activate() { _active = true; } | |
49 void deactivate() { _active = false; } | |
50 | |
342 | 51 private: |
52 ConcurrentG1Refine* _cg1r; | |
53 | |
54 COTracker _co_tracker; | |
55 double _interval_ms; | |
56 | |
57 void decreaseInterval(int processing_time_ms) { | |
58 double min_interval_ms = (double) processing_time_ms; | |
59 _interval_ms = 0.8 * _interval_ms; | |
60 if (_interval_ms < min_interval_ms) | |
61 _interval_ms = min_interval_ms; | |
62 } | |
63 void increaseInterval(int processing_time_ms) { | |
64 double max_interval_ms = 9.0 * (double) processing_time_ms; | |
65 _interval_ms = 1.1 * _interval_ms; | |
66 if (max_interval_ms > 0 && _interval_ms > max_interval_ms) | |
67 _interval_ms = max_interval_ms; | |
68 } | |
69 | |
70 void sleepBeforeNextCycle(); | |
71 | |
72 // For use by G1CollectedHeap, which is a friend. | |
73 static SuspendibleThreadSet* sts() { return &_sts; } | |
74 | |
75 public: | |
76 // Constructor | |
795
215f81b4d9b3
6841831: G1: assert(contains_reference(from),"We just added it!") fires
iveresov
parents:
794
diff
changeset
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77 ConcurrentG1RefineThread(ConcurrentG1Refine* cg1r, ConcurrentG1RefineThread* next, |
215f81b4d9b3
6841831: G1: assert(contains_reference(from),"We just added it!") fires
iveresov
parents:
794
diff
changeset
|
78 int worker_id_offset, int worker_id); |
342 | 79 |
80 // Printing | |
81 void print(); | |
82 | |
83 // Total virtual time so far. | |
84 double vtime_accum() { return _vtime_accum; } | |
85 | |
86 ConcurrentG1Refine* cg1r() { return _cg1r; } | |
87 | |
88 void sample_young_list_rs_lengths(); | |
89 | |
90 // Yield for GC | |
91 void yield(); | |
92 | |
93 // shutdown | |
794 | 94 void stop(); |
342 | 95 }; |