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src/share/vm/gc_implementation/parallelScavenge/psTasks.hpp@8b10f48633dc (annotated)

src/share/vm/gc_implementation/parallelScavenge/psTasks.hpp

Mon, 20 Sep 2010 14:38:38 -0700

author

jmasa

date

Mon, 20 Sep 2010 14:38:38 -0700

changeset 2188

8b10f48633dc

parent 1907

c18cbe5936b8

child 2314

f95d63e2154a

permissions

-rw-r--r--

6984287: Regularize how GC parallel workers are specified.
Summary: Associate number of GC workers with the workgang as opposed to the task.
Reviewed-by: johnc, ysr

duke@435	1	/*
trims@1907	2	* Copyright (c) 2002, 2005, Oracle and/or its affiliates. All rights reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	//
duke@435	26	// psTasks.hpp is a collection of GCTasks used by the
duke@435	27	// parallelScavenge collector.
duke@435	28	//
duke@435	29
duke@435	30	class GCTask;
duke@435	31	class OopClosure;
duke@435	32	class OopStack;
duke@435	33	class ObjectStartArray;
duke@435	34	class ParallelTaskTerminator;
duke@435	35	class MutableSpace;
duke@435	36	class PSOldGen;
duke@435	37	class Thread;
duke@435	38	class VMThread;
duke@435	39
duke@435	40	//
duke@435	41	// ScavengeRootsTask
duke@435	42	//
duke@435	43	// This task scans all the roots of a given type.
duke@435	44	//
duke@435	45	//
duke@435	46
duke@435	47	class ScavengeRootsTask : public GCTask {
duke@435	48	public:
duke@435	49	enum RootType {
duke@435	50	universe = 1,
duke@435	51	jni_handles = 2,
duke@435	52	threads = 3,
duke@435	53	object_synchronizer = 4,
duke@435	54	flat_profiler = 5,
duke@435	55	system_dictionary = 6,
duke@435	56	management = 7,
jrose@1424	57	jvmti = 8,
jrose@1424	58	code_cache = 9
duke@435	59	};
duke@435	60	private:
duke@435	61	RootType _root_type;
duke@435	62	public:
duke@435	63	ScavengeRootsTask(RootType value) : _root_type(value) {}
duke@435	64
duke@435	65	char* name() { return (char *)"scavenge-roots-task"; }
duke@435	66
duke@435	67	virtual void do_it(GCTaskManager* manager, uint which);
duke@435	68	};
duke@435	69
duke@435	70	//
duke@435	71	// ThreadRootsTask
duke@435	72	//
duke@435	73	// This task scans the roots of a single thread. This task
duke@435	74	// enables scanning of thread roots in parallel.
duke@435	75	//
duke@435	76
duke@435	77	class ThreadRootsTask : public GCTask {
duke@435	78	private:
duke@435	79	JavaThread* _java_thread;
duke@435	80	VMThread* _vm_thread;
duke@435	81	public:
duke@435	82	ThreadRootsTask(JavaThread* root) : _java_thread(root), _vm_thread(NULL) {}
duke@435	83	ThreadRootsTask(VMThread* root) : _java_thread(NULL), _vm_thread(root) {}
duke@435	84
duke@435	85	char* name() { return (char *)"thread-roots-task"; }
duke@435	86
duke@435	87	virtual void do_it(GCTaskManager* manager, uint which);
duke@435	88	};
duke@435	89
duke@435	90	//
duke@435	91	// StealTask
duke@435	92	//
duke@435	93	// This task is used to distribute work to idle threads.
duke@435	94	//
duke@435	95
duke@435	96	class StealTask : public GCTask {
duke@435	97	private:
duke@435	98	ParallelTaskTerminator* const _terminator;
duke@435	99	public:
duke@435	100	char* name() { return (char *)"steal-task"; }
duke@435	101
duke@435	102	StealTask(ParallelTaskTerminator* t);
duke@435	103
duke@435	104	ParallelTaskTerminator* terminator() { return _terminator; }
duke@435	105
duke@435	106	virtual void do_it(GCTaskManager* manager, uint which);
duke@435	107	};
duke@435	108
duke@435	109	//
duke@435	110	// SerialOldToYoungRootsTask
duke@435	111	//
duke@435	112	// This task is used to scan for roots in the perm gen
duke@435	113
duke@435	114	class SerialOldToYoungRootsTask : public GCTask {
duke@435	115	private:
duke@435	116	PSOldGen* _gen;
duke@435	117	HeapWord* _gen_top;
duke@435	118
duke@435	119	public:
duke@435	120	SerialOldToYoungRootsTask(PSOldGen *gen, HeapWord* gen_top) :
duke@435	121	_gen(gen), _gen_top(gen_top) { }
duke@435	122
duke@435	123	char* name() { return (char *)"serial-old-to-young-roots-task"; }
duke@435	124
duke@435	125	virtual void do_it(GCTaskManager* manager, uint which);
duke@435	126	};
duke@435	127
duke@435	128	//
duke@435	129	// OldToYoungRootsTask
duke@435	130	//
duke@435	131	// This task is used to scan old to young roots in parallel
duke@435	132
duke@435	133	class OldToYoungRootsTask : public GCTask {
duke@435	134	private:
duke@435	135	PSOldGen* _gen;
duke@435	136	HeapWord* _gen_top;
duke@435	137	uint _stripe_number;
duke@435	138
duke@435	139	public:
duke@435	140	OldToYoungRootsTask(PSOldGen *gen, HeapWord* gen_top, uint stripe_number) :
duke@435	141	_gen(gen), _gen_top(gen_top), _stripe_number(stripe_number) { }
duke@435	142
duke@435	143	char* name() { return (char *)"old-to-young-roots-task"; }
duke@435	144
duke@435	145	virtual void do_it(GCTaskManager* manager, uint which);
duke@435	146	};