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src/share/vm/gc_implementation/g1/vm_operations_g1.hpp@710a3c8b516e (annotated)

src/share/vm/gc_implementation/g1/vm_operations_g1.hpp

Tue, 08 Aug 2017 15:57:29 +0800

author

aoqi

date

Tue, 08 Aug 2017 15:57:29 +0800

changeset 6876

710a3c8b516e

parent 3823

37552638d24a

parent 0

f90c822e73f8

child 7535

7ae4e26cb1e0

permissions

-rw-r--r--

merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@0	25	#ifndef SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP
aoqi@0	26	#define SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP
aoqi@0	27
aoqi@0	28	#include "gc_implementation/shared/vmGCOperations.hpp"
aoqi@0	29
aoqi@0	30	// VM_operations for the G1 collector.
aoqi@0	31	// VM_GC_Operation:
aoqi@0	32	// - VM_CGC_Operation
aoqi@0	33	// - VM_G1CollectFull
aoqi@0	34	// - VM_G1OperationWithAllocRequest
aoqi@0	35	// - VM_G1CollectForAllocation
aoqi@0	36	// - VM_G1IncCollectionPause
aoqi@0	37
aoqi@0	38	class VM_G1OperationWithAllocRequest: public VM_GC_Operation {
aoqi@0	39	protected:
aoqi@0	40	size_t _word_size;
aoqi@0	41	HeapWord* _result;
aoqi@0	42	bool _pause_succeeded;
aoqi@0	43
aoqi@0	44	public:
aoqi@0	45	VM_G1OperationWithAllocRequest(unsigned int gc_count_before,
aoqi@0	46	size_t word_size,
aoqi@0	47	GCCause::Cause gc_cause)
aoqi@0	48	: VM_GC_Operation(gc_count_before, gc_cause),
aoqi@0	49	_word_size(word_size), _result(NULL), _pause_succeeded(false) { }
aoqi@0	50	HeapWord* result() { return _result; }
aoqi@0	51	bool pause_succeeded() { return _pause_succeeded; }
aoqi@0	52	};
aoqi@0	53
aoqi@0	54	class VM_G1CollectFull: public VM_GC_Operation {
aoqi@0	55	public:
aoqi@0	56	VM_G1CollectFull(unsigned int gc_count_before,
aoqi@0	57	unsigned int full_gc_count_before,
aoqi@0	58	GCCause::Cause cause)
aoqi@0	59	: VM_GC_Operation(gc_count_before, cause, full_gc_count_before) { }
aoqi@0	60	virtual VMOp_Type type() const { return VMOp_G1CollectFull; }
aoqi@0	61	virtual void doit();
aoqi@0	62	virtual const char* name() const {
aoqi@0	63	return "full garbage-first collection";
aoqi@0	64	}
aoqi@0	65	};
aoqi@0	66
aoqi@0	67	class VM_G1CollectForAllocation: public VM_G1OperationWithAllocRequest {
aoqi@0	68	public:
aoqi@0	69	VM_G1CollectForAllocation(unsigned int gc_count_before,
aoqi@0	70	size_t word_size);
aoqi@0	71	virtual VMOp_Type type() const { return VMOp_G1CollectForAllocation; }
aoqi@0	72	virtual void doit();
aoqi@0	73	virtual const char* name() const {
aoqi@0	74	return "garbage-first collection to satisfy allocation";
aoqi@0	75	}
aoqi@0	76	};
aoqi@0	77
aoqi@0	78	class VM_G1IncCollectionPause: public VM_G1OperationWithAllocRequest {
aoqi@0	79	private:
aoqi@0	80	bool _should_initiate_conc_mark;
aoqi@0	81	bool _should_retry_gc;
aoqi@0	82	double _target_pause_time_ms;
aoqi@0	83	unsigned int _old_marking_cycles_completed_before;
aoqi@0	84	public:
aoqi@0	85	VM_G1IncCollectionPause(unsigned int gc_count_before,
aoqi@0	86	size_t word_size,
aoqi@0	87	bool should_initiate_conc_mark,
aoqi@0	88	double target_pause_time_ms,
aoqi@0	89	GCCause::Cause gc_cause);
aoqi@0	90	virtual VMOp_Type type() const { return VMOp_G1IncCollectionPause; }
aoqi@0	91	virtual bool doit_prologue();
aoqi@0	92	virtual void doit();
aoqi@0	93	virtual void doit_epilogue();
aoqi@0	94	virtual const char* name() const {
aoqi@0	95	return "garbage-first incremental collection pause";
aoqi@0	96	}
aoqi@0	97	bool should_retry_gc() const { return _should_retry_gc; }
aoqi@0	98	};
aoqi@0	99
aoqi@0	100	// Concurrent GC stop-the-world operations such as remark and cleanup;
aoqi@0	101	// consider sharing these with CMS's counterparts.
aoqi@0	102	class VM_CGC_Operation: public VM_Operation {
aoqi@0	103	VoidClosure* _cl;
aoqi@0	104	const char* _printGCMessage;
aoqi@0	105	bool _needs_pll;
aoqi@0	106
aoqi@0	107	protected:
aoqi@0	108	// java.lang.ref.Reference support
aoqi@0	109	void acquire_pending_list_lock();
aoqi@0	110	void release_and_notify_pending_list_lock();
aoqi@0	111
aoqi@0	112	public:
aoqi@0	113	VM_CGC_Operation(VoidClosure* cl, const char *printGCMsg, bool needs_pll)
aoqi@0	114	: _cl(cl), _printGCMessage(printGCMsg), _needs_pll(needs_pll) { }
aoqi@0	115	virtual VMOp_Type type() const { return VMOp_CGC_Operation; }
aoqi@0	116	virtual void doit();
aoqi@0	117	virtual bool doit_prologue();
aoqi@0	118	virtual void doit_epilogue();
aoqi@0	119	virtual const char* name() const {
aoqi@0	120	return "concurrent gc";
aoqi@0	121	}
aoqi@0	122	};
aoqi@0	123
aoqi@0	124	#endif // SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP