Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/concurrentG1RefineThread.hpp @ 941:8b46c4d82093
4957990: Perm heap bloat in JVM
Summary: Treat ProfileData in MDO's as a source of weak, not strong, roots. Fixes the bug for stop-world collection -- the case of concurrent collection will be fixed separately.
Reviewed-by: jcoomes, jmasa, kvn, never
| author | ysr |
|---|---|
| date | Wed, 02 Sep 2009 00:04:29 -0700 |
| parents | e1fdf4fd34dc |
| children | 035d2e036a9b |
| rev | line source |
|---|---|
| 342 | 1 /* |
| 844 | 2 * Copyright 2001-2009 Sun Microsystems, Inc. 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 * | |
| 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; |
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215f81b4d9b3
6841831: G1: assert(contains_reference(from),"We just added it!") fires
iveresov
parents:
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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 double _interval_ms; | |
| 55 | |
| 56 void decreaseInterval(int processing_time_ms) { | |
| 57 double min_interval_ms = (double) processing_time_ms; | |
| 58 _interval_ms = 0.8 * _interval_ms; | |
| 59 if (_interval_ms < min_interval_ms) | |
| 60 _interval_ms = min_interval_ms; | |
| 61 } | |
| 62 void increaseInterval(int processing_time_ms) { | |
| 63 double max_interval_ms = 9.0 * (double) processing_time_ms; | |
| 64 _interval_ms = 1.1 * _interval_ms; | |
| 65 if (max_interval_ms > 0 && _interval_ms > max_interval_ms) | |
| 66 _interval_ms = max_interval_ms; | |
| 67 } | |
| 68 | |
| 69 void sleepBeforeNextCycle(); | |
| 70 | |
| 71 // For use by G1CollectedHeap, which is a friend. | |
| 72 static SuspendibleThreadSet* sts() { return &_sts; } | |
| 73 | |
| 74 public: | |
| 75 // Constructor | |
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215f81b4d9b3
6841831: G1: assert(contains_reference(from),"We just added it!") fires
iveresov
parents:
794
diff
changeset
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76 ConcurrentG1RefineThread(ConcurrentG1Refine* cg1r, ConcurrentG1RefineThread* next, |
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215f81b4d9b3
6841831: G1: assert(contains_reference(from),"We just added it!") fires
iveresov
parents:
794
diff
changeset
|
77 int worker_id_offset, int worker_id); |
| 342 | 78 |
| 79 // Printing | |
| 80 void print(); | |
| 81 | |
| 82 // Total virtual time so far. | |
| 83 double vtime_accum() { return _vtime_accum; } | |
| 84 | |
| 85 ConcurrentG1Refine* cg1r() { return _cg1r; } | |
| 86 | |
| 87 void sample_young_list_rs_lengths(); | |
| 88 | |
| 89 // Yield for GC | |
| 90 void yield(); | |
| 91 | |
| 92 // shutdown | |
| 794 | 93 void stop(); |
| 342 | 94 }; |