Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/concurrentZFThread.hpp @ 1703:f6f3eef8a521
6581734: CMS Old Gen's collection usage is zero after GC which is incorrect
Summary: Management code enabled for use by a concurrent collector.
Reviewed-by: mchung, ysr
author | kevinw |
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date | Fri, 30 Jul 2010 22:43:50 +0100 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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342 | 1 /* |
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2 * Copyright (c) 2001, 2009, 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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6941466: Oracle rebranding changes for Hotspot repositories
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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parents:
1019
diff
changeset
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20 * or visit www.oracle.com if you need additional information or have any |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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parents:
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21 * questions. |
342 | 22 * |
23 */ | |
24 | |
25 // The Concurrent ZF Thread. Performs concurrent zero-filling. | |
26 | |
27 class ConcurrentZFThread: public ConcurrentGCThread { | |
28 friend class VMStructs; | |
29 friend class ZeroFillRegionClosure; | |
30 | |
31 private: | |
32 | |
33 // Zero fill the heap region. | |
34 void processHeapRegion(HeapRegion* r); | |
35 | |
36 // Stats | |
37 // Allocation (protected by heap lock). | |
38 static int _region_allocs; // Number of regions allocated | |
39 static int _sync_zfs; // Synchronous zero-fills + | |
40 static int _zf_waits; // Wait for conc zero-fill completion. | |
41 | |
42 // Number of regions CFZ thread fills. | |
43 static int _regions_filled; | |
44 | |
45 double _vtime_start; // Initial virtual time. | |
46 | |
47 // These are static because the "print_summary_info" method is, and | |
48 // it currently assumes there is only one ZF thread. We'll change when | |
49 // we need to. | |
50 static double _vtime_accum; // Initial virtual time. | |
51 static double vtime_accum() { return _vtime_accum; } | |
52 | |
53 // Offer yield for GC. Returns true if yield occurred. | |
54 bool offer_yield(); | |
55 | |
56 public: | |
57 // Constructor | |
58 ConcurrentZFThread(); | |
59 | |
60 // Main loop. | |
61 virtual void run(); | |
62 | |
63 // Printing | |
1019 | 64 void print_on(outputStream* st) const; |
65 void print() const; | |
342 | 66 |
67 // Waits until "r" has been zero-filled. Requires caller to hold the | |
68 // ZF_mon. | |
69 static void wait_for_ZF_completed(HeapRegion* r); | |
70 | |
71 // Get or clear the current unclean region. Should be done | |
72 // while holding the ZF_needed_mon lock. | |
73 | |
74 // shutdown | |
794 | 75 void stop(); |
342 | 76 |
77 // Stats | |
78 static void note_region_alloc() {_region_allocs++; } | |
79 static void note_sync_zfs() { _sync_zfs++; } | |
80 static void note_zf_wait() { _zf_waits++; } | |
81 static void note_region_filled() { _regions_filled++; } | |
82 | |
83 static void print_summary_info(); | |
84 }; |