Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/concurrentMarkThread.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 |
---|---|
date | Fri, 30 Jul 2010 22:43:50 +0100 |
parents | c18cbe5936b8 |
children | 4e0094bc41fa |
rev | line source |
---|---|
342 | 1 /* |
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1359
diff
changeset
|
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 * | |
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1359
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1359
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1359
diff
changeset
|
21 * questions. |
342 | 22 * |
23 */ | |
24 | |
25 // The Concurrent Mark GC Thread (could be several in the future). | |
26 // This is copied from the Concurrent Mark Sweep GC Thread | |
27 // Still under construction. | |
28 | |
29 class ConcurrentMark; | |
30 | |
31 class ConcurrentMarkThread: public ConcurrentGCThread { | |
32 friend class VMStructs; | |
33 | |
34 double _vtime_start; // Initial virtual time. | |
35 double _vtime_accum; // Accumulated virtual time. | |
36 | |
37 double _vtime_mark_accum; | |
38 double _vtime_count_accum; | |
39 | |
40 public: | |
41 virtual void run(); | |
42 | |
43 private: | |
44 ConcurrentMark* _cm; | |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1019
diff
changeset
|
45 volatile bool _started; |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1019
diff
changeset
|
46 volatile bool _in_progress; |
342 | 47 |
48 void sleepBeforeNextCycle(); | |
49 | |
50 static SurrogateLockerThread* _slt; | |
51 | |
52 public: | |
53 // Constructor | |
54 ConcurrentMarkThread(ConcurrentMark* cm); | |
55 | |
56 static void makeSurrogateLockerThread(TRAPS); | |
57 static SurrogateLockerThread* slt() { return _slt; } | |
58 | |
59 // Printing | |
1019 | 60 void print_on(outputStream* st) const; |
61 void print() const; | |
342 | 62 |
63 // Total virtual time so far. | |
64 double vtime_accum(); | |
65 // Marking virtual time so far | |
66 double vtime_mark_accum(); | |
67 // Counting virtual time so far. | |
68 double vtime_count_accum() { return _vtime_count_accum; } | |
69 | |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1019
diff
changeset
|
70 ConcurrentMark* cm() { return _cm; } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1019
diff
changeset
|
71 |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1019
diff
changeset
|
72 void set_started() { _started = true; } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1019
diff
changeset
|
73 void clear_started() { _started = false; } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1019
diff
changeset
|
74 bool started() { return _started; } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1019
diff
changeset
|
75 |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1019
diff
changeset
|
76 void set_in_progress() { _in_progress = true; } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1019
diff
changeset
|
77 void clear_in_progress() { _in_progress = false; } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1019
diff
changeset
|
78 bool in_progress() { return _in_progress; } |
342 | 79 |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1019
diff
changeset
|
80 // This flag returns true from the moment a marking cycle is |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1019
diff
changeset
|
81 // initiated (during the initial-mark pause when started() is set) |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1019
diff
changeset
|
82 // to the moment when the cycle completes (just after the next |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1019
diff
changeset
|
83 // marking bitmap has been cleared and in_progress() is |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1019
diff
changeset
|
84 // cleared). While this flag is true we will not start another cycle |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1019
diff
changeset
|
85 // so that cycles do not overlap. We cannot use just in_progress() |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1019
diff
changeset
|
86 // as the CM thread might take some time to wake up before noticing |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1019
diff
changeset
|
87 // that started() is set and set in_progress(). |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1019
diff
changeset
|
88 bool during_cycle() { return started() || in_progress(); } |
342 | 89 |
90 // Yield for GC | |
91 void yield(); | |
92 | |
93 // shutdown | |
794 | 94 void stop(); |
342 | 95 }; |