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src/share/vm/gc_implementation/parallelScavenge/psTasks.hpp@0f773163217d (annotated)

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

Thu, 11 Dec 2008 12:05:21 -0800

author

jcoomes

date

Thu, 11 Dec 2008 12:05:21 -0800

changeset 918

0f773163217d

parent 435

a61af66fc99e

child 1424

148e5441d916

permissions

-rw-r--r--

6765954: par compact - stress mode for splitting young gen spaces
Reviewed-by: jmasa

duke@435	1	/*
duke@435	2	* Copyright 2002-2005 Sun Microsystems, Inc. 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	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any 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,
duke@435	57	jvmti = 8
duke@435	58	};
duke@435	59	private:
duke@435	60	RootType _root_type;
duke@435	61	public:
duke@435	62	ScavengeRootsTask(RootType value) : _root_type(value) {}
duke@435	63
duke@435	64	char* name() { return (char *)"scavenge-roots-task"; }
duke@435	65
duke@435	66	virtual void do_it(GCTaskManager* manager, uint which);
duke@435	67	};
duke@435	68
duke@435	69	//
duke@435	70	// ThreadRootsTask
duke@435	71	//
duke@435	72	// This task scans the roots of a single thread. This task
duke@435	73	// enables scanning of thread roots in parallel.
duke@435	74	//
duke@435	75
duke@435	76	class ThreadRootsTask : public GCTask {
duke@435	77	private:
duke@435	78	JavaThread* _java_thread;
duke@435	79	VMThread* _vm_thread;
duke@435	80	public:
duke@435	81	ThreadRootsTask(JavaThread* root) : _java_thread(root), _vm_thread(NULL) {}
duke@435	82	ThreadRootsTask(VMThread* root) : _java_thread(NULL), _vm_thread(root) {}
duke@435	83
duke@435	84	char* name() { return (char *)"thread-roots-task"; }
duke@435	85
duke@435	86	virtual void do_it(GCTaskManager* manager, uint which);
duke@435	87	};
duke@435	88
duke@435	89	//
duke@435	90	// StealTask
duke@435	91	//
duke@435	92	// This task is used to distribute work to idle threads.
duke@435	93	//
duke@435	94
duke@435	95	class StealTask : public GCTask {
duke@435	96	private:
duke@435	97	ParallelTaskTerminator* const _terminator;
duke@435	98	public:
duke@435	99	char* name() { return (char *)"steal-task"; }
duke@435	100
duke@435	101	StealTask(ParallelTaskTerminator* t);
duke@435	102
duke@435	103	ParallelTaskTerminator* terminator() { return _terminator; }
duke@435	104
duke@435	105	virtual void do_it(GCTaskManager* manager, uint which);
duke@435	106	};
duke@435	107
duke@435	108	//
duke@435	109	// SerialOldToYoungRootsTask
duke@435	110	//
duke@435	111	// This task is used to scan for roots in the perm gen
duke@435	112
duke@435	113	class SerialOldToYoungRootsTask : public GCTask {
duke@435	114	private:
duke@435	115	PSOldGen* _gen;
duke@435	116	HeapWord* _gen_top;
duke@435	117
duke@435	118	public:
duke@435	119	SerialOldToYoungRootsTask(PSOldGen *gen, HeapWord* gen_top) :
duke@435	120	_gen(gen), _gen_top(gen_top) { }
duke@435	121
duke@435	122	char* name() { return (char *)"serial-old-to-young-roots-task"; }
duke@435	123
duke@435	124	virtual void do_it(GCTaskManager* manager, uint which);
duke@435	125	};
duke@435	126
duke@435	127	//
duke@435	128	// OldToYoungRootsTask
duke@435	129	//
duke@435	130	// This task is used to scan old to young roots in parallel
duke@435	131
duke@435	132	class OldToYoungRootsTask : public GCTask {
duke@435	133	private:
duke@435	134	PSOldGen* _gen;
duke@435	135	HeapWord* _gen_top;
duke@435	136	uint _stripe_number;
duke@435	137
duke@435	138	public:
duke@435	139	OldToYoungRootsTask(PSOldGen *gen, HeapWord* gen_top, uint stripe_number) :
duke@435	140	_gen(gen), _gen_top(gen_top), _stripe_number(stripe_number) { }
duke@435	141
duke@435	142	char* name() { return (char *)"old-to-young-roots-task"; }
duke@435	143
duke@435	144	virtual void do_it(GCTaskManager* manager, uint which);
duke@435	145	};