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src/share/vm/gc_implementation/parallelScavenge/psTasks.hpp@1fb790245268 (annotated)

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

Fri, 11 Mar 2011 16:35:18 +0100

author

jwilhelm

date

Fri, 11 Mar 2011 16:35:18 +0100

changeset 2648

1fb790245268

parent 2314

f95d63e2154a

child 3294

bca17e38de00

permissions

-rw-r--r--

6820066: Check that -XX:ParGCArrayScanChunk has a value larger than zero.
Summary: Check that -XX:ParGCArrayScanChunk has a value larger than zero.
Reviewed-by: johnc, jmasa, ysr

duke@435	1	/*
stefank@2314	2	* Copyright (c) 2002, 2010, 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
stefank@2314	25	#ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSTASKS_HPP
stefank@2314	26	#define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSTASKS_HPP
stefank@2314	27
stefank@2314	28	#include "memory/allocation.hpp"
stefank@2314	29	#include "utilities/growableArray.hpp"
stefank@2314	30
duke@435	31	//
duke@435	32	// psTasks.hpp is a collection of GCTasks used by the
duke@435	33	// parallelScavenge collector.
duke@435	34	//
duke@435	35
duke@435	36	class GCTask;
duke@435	37	class OopClosure;
duke@435	38	class OopStack;
duke@435	39	class ObjectStartArray;
duke@435	40	class ParallelTaskTerminator;
duke@435	41	class MutableSpace;
duke@435	42	class PSOldGen;
duke@435	43	class Thread;
duke@435	44	class VMThread;
duke@435	45
duke@435	46	//
duke@435	47	// ScavengeRootsTask
duke@435	48	//
duke@435	49	// This task scans all the roots of a given type.
duke@435	50	//
duke@435	51	//
duke@435	52
duke@435	53	class ScavengeRootsTask : public GCTask {
duke@435	54	public:
duke@435	55	enum RootType {
duke@435	56	universe = 1,
duke@435	57	jni_handles = 2,
duke@435	58	threads = 3,
duke@435	59	object_synchronizer = 4,
duke@435	60	flat_profiler = 5,
duke@435	61	system_dictionary = 6,
duke@435	62	management = 7,
jrose@1424	63	jvmti = 8,
jrose@1424	64	code_cache = 9
duke@435	65	};
duke@435	66	private:
duke@435	67	RootType _root_type;
duke@435	68	public:
duke@435	69	ScavengeRootsTask(RootType value) : _root_type(value) {}
duke@435	70
duke@435	71	char* name() { return (char *)"scavenge-roots-task"; }
duke@435	72
duke@435	73	virtual void do_it(GCTaskManager* manager, uint which);
duke@435	74	};
duke@435	75
duke@435	76	//
duke@435	77	// ThreadRootsTask
duke@435	78	//
duke@435	79	// This task scans the roots of a single thread. This task
duke@435	80	// enables scanning of thread roots in parallel.
duke@435	81	//
duke@435	82
duke@435	83	class ThreadRootsTask : public GCTask {
duke@435	84	private:
duke@435	85	JavaThread* _java_thread;
duke@435	86	VMThread* _vm_thread;
duke@435	87	public:
duke@435	88	ThreadRootsTask(JavaThread* root) : _java_thread(root), _vm_thread(NULL) {}
duke@435	89	ThreadRootsTask(VMThread* root) : _java_thread(NULL), _vm_thread(root) {}
duke@435	90
duke@435	91	char* name() { return (char *)"thread-roots-task"; }
duke@435	92
duke@435	93	virtual void do_it(GCTaskManager* manager, uint which);
duke@435	94	};
duke@435	95
duke@435	96	//
duke@435	97	// StealTask
duke@435	98	//
duke@435	99	// This task is used to distribute work to idle threads.
duke@435	100	//
duke@435	101
duke@435	102	class StealTask : public GCTask {
duke@435	103	private:
duke@435	104	ParallelTaskTerminator* const _terminator;
duke@435	105	public:
duke@435	106	char* name() { return (char *)"steal-task"; }
duke@435	107
duke@435	108	StealTask(ParallelTaskTerminator* t);
duke@435	109
duke@435	110	ParallelTaskTerminator* terminator() { return _terminator; }
duke@435	111
duke@435	112	virtual void do_it(GCTaskManager* manager, uint which);
duke@435	113	};
duke@435	114
duke@435	115	//
duke@435	116	// SerialOldToYoungRootsTask
duke@435	117	//
duke@435	118	// This task is used to scan for roots in the perm gen
duke@435	119
duke@435	120	class SerialOldToYoungRootsTask : public GCTask {
duke@435	121	private:
duke@435	122	PSOldGen* _gen;
duke@435	123	HeapWord* _gen_top;
duke@435	124
duke@435	125	public:
duke@435	126	SerialOldToYoungRootsTask(PSOldGen *gen, HeapWord* gen_top) :
duke@435	127	_gen(gen), _gen_top(gen_top) { }
duke@435	128
duke@435	129	char* name() { return (char *)"serial-old-to-young-roots-task"; }
duke@435	130
duke@435	131	virtual void do_it(GCTaskManager* manager, uint which);
duke@435	132	};
duke@435	133
duke@435	134	//
duke@435	135	// OldToYoungRootsTask
duke@435	136	//
duke@435	137	// This task is used to scan old to young roots in parallel
duke@435	138
duke@435	139	class OldToYoungRootsTask : public GCTask {
duke@435	140	private:
duke@435	141	PSOldGen* _gen;
duke@435	142	HeapWord* _gen_top;
duke@435	143	uint _stripe_number;
duke@435	144
duke@435	145	public:
duke@435	146	OldToYoungRootsTask(PSOldGen *gen, HeapWord* gen_top, uint stripe_number) :
duke@435	147	_gen(gen), _gen_top(gen_top), _stripe_number(stripe_number) { }
duke@435	148
duke@435	149	char* name() { return (char *)"old-to-young-roots-task"; }
duke@435	150
duke@435	151	virtual void do_it(GCTaskManager* manager, uint which);
duke@435	152	};
stefank@2314	153
stefank@2314	154	#endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSTASKS_HPP