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src/share/vm/gc_implementation/parNew/parOopClosures.hpp@5cfd8d19e546
src/share/vm/gc_implementation/parNew/parOopClosures.hpp
Mon, 26 Jan 2009 12:47:21 -0800
- author
- ysr
- date
- Mon, 26 Jan 2009 12:47:21 -0800
- changeset 969
- 5cfd8d19e546
- parent 548
- ba764ed4b6f2
- child 1907
- c18cbe5936b8
- permissions
- -rw-r--r--
6786503: Overflow list performance can be improved
Summary: Avoid overflow list walk in CMS & ParNew when it is unnecessary. Fix a couple of correctness issues, including a C-heap leak, in ParNew at the intersection of promotion failure, work queue overflow and object array chunking. Add stress testing option and related assertion checking.
Reviewed-by: jmasa
1 /*
2 * Copyright (c) 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 */
25 // Closures for ParNewGeneration
27 class ParScanThreadState;
28 class ParNewGeneration;
29 typedef OopTaskQueueSet ObjToScanQueueSet;
30 class ParallelTaskTerminator;
32 class ParScanClosure: public OopsInGenClosure {
33 protected:
34 ParScanThreadState* _par_scan_state;
35 ParNewGeneration* _g;
36 HeapWord* _boundary;
37 template <class T> void inline par_do_barrier(T* p);
38 template <class T> void inline do_oop_work(T* p,
39 bool gc_barrier,
40 bool root_scan);
41 public:
42 ParScanClosure(ParNewGeneration* g, ParScanThreadState* par_scan_state);
43 };
45 class ParScanWithBarrierClosure: public ParScanClosure {
46 public:
47 ParScanWithBarrierClosure(ParNewGeneration* g,
48 ParScanThreadState* par_scan_state) :
49 ParScanClosure(g, par_scan_state) {}
50 virtual void do_oop(oop* p);
51 virtual void do_oop(narrowOop* p);
52 inline void do_oop_nv(oop* p);
53 inline void do_oop_nv(narrowOop* p);
54 };
56 class ParScanWithoutBarrierClosure: public ParScanClosure {
57 public:
58 ParScanWithoutBarrierClosure(ParNewGeneration* g,
59 ParScanThreadState* par_scan_state) :
60 ParScanClosure(g, par_scan_state) {}
61 virtual void do_oop(oop* p);
62 virtual void do_oop(narrowOop* p);
63 inline void do_oop_nv(oop* p);
64 inline void do_oop_nv(narrowOop* p);
65 };
67 class ParRootScanWithBarrierTwoGensClosure: public ParScanClosure {
68 public:
69 ParRootScanWithBarrierTwoGensClosure(ParNewGeneration* g,
70 ParScanThreadState* par_scan_state) :
71 ParScanClosure(g, par_scan_state) {}
72 virtual void do_oop(oop* p);
73 virtual void do_oop(narrowOop* p);
74 };
76 class ParRootScanWithoutBarrierClosure: public ParScanClosure {
77 public:
78 ParRootScanWithoutBarrierClosure(ParNewGeneration* g,
79 ParScanThreadState* par_scan_state) :
80 ParScanClosure(g, par_scan_state) {}
81 virtual void do_oop(oop* p);
82 virtual void do_oop(narrowOop* p);
83 };
85 class ParScanWeakRefClosure: public ScanWeakRefClosure {
86 protected:
87 ParScanThreadState* _par_scan_state;
88 template <class T> inline void do_oop_work(T* p);
89 public:
90 ParScanWeakRefClosure(ParNewGeneration* g,
91 ParScanThreadState* par_scan_state);
92 virtual void do_oop(oop* p);
93 virtual void do_oop(narrowOop* p);
94 inline void do_oop_nv(oop* p);
95 inline void do_oop_nv(narrowOop* p);
96 };
98 class ParEvacuateFollowersClosure: public VoidClosure {
99 private:
100 ParScanThreadState* _par_scan_state;
101 ParScanThreadState* par_scan_state() { return _par_scan_state; }
103 // We want to preserve the specific types here (rather than "OopClosure")
104 // for later de-virtualization of do_oop calls.
105 ParScanWithoutBarrierClosure* _to_space_closure;
106 ParScanWithoutBarrierClosure* to_space_closure() {
107 return _to_space_closure;
108 }
109 ParRootScanWithoutBarrierClosure* _to_space_root_closure;
110 ParRootScanWithoutBarrierClosure* to_space_root_closure() {
111 return _to_space_root_closure;
112 }
114 ParScanWithBarrierClosure* _old_gen_closure;
115 ParScanWithBarrierClosure* old_gen_closure () {
116 return _old_gen_closure;
117 }
118 ParRootScanWithBarrierTwoGensClosure* _old_gen_root_closure;
119 ParRootScanWithBarrierTwoGensClosure* old_gen_root_closure () {
120 return _old_gen_root_closure;
121 }
123 ParNewGeneration* _par_gen;
124 ParNewGeneration* par_gen() { return _par_gen; }
126 ObjToScanQueueSet* _task_queues;
127 ObjToScanQueueSet* task_queues() { return _task_queues; }
129 ParallelTaskTerminator* _terminator;
130 ParallelTaskTerminator* terminator() { return _terminator; }
131 public:
132 ParEvacuateFollowersClosure(
133 ParScanThreadState* par_scan_state_,
134 ParScanWithoutBarrierClosure* to_space_closure_,
135 ParScanWithBarrierClosure* old_gen_closure_,
136 ParRootScanWithoutBarrierClosure* to_space_root_closure_,
137 ParNewGeneration* par_gen_,
138 ParRootScanWithBarrierTwoGensClosure* old_gen_root_closure_,
139 ObjToScanQueueSet* task_queues_,
140 ParallelTaskTerminator* terminator_);
141 virtual void do_void();
142 };
