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src/share/vm/gc_implementation/g1/vm_operations_g1.hpp@7ae4e26cb1e0 (annotated)

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

Thu, 12 Oct 2017 21:27:07 +0800

author

aoqi

date

Thu, 12 Oct 2017 21:27:07 +0800

changeset 7535

7ae4e26cb1e0

parent 7285

1d6eb209432a

parent 6876

710a3c8b516e

child 7994

04ff2f6cd0eb

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
sjohanss@7118	28	#include "gc_implementation/g1/g1AllocationContext.hpp"
aoqi@0	29	#include "gc_implementation/shared/vmGCOperations.hpp"
aoqi@0	30
aoqi@0	31	// VM_operations for the G1 collector.
aoqi@0	32	// VM_GC_Operation:
aoqi@0	33	// - VM_CGC_Operation
aoqi@0	34	// - VM_G1CollectFull
aoqi@0	35	// - VM_G1OperationWithAllocRequest
aoqi@0	36	// - VM_G1CollectForAllocation
aoqi@0	37	// - VM_G1IncCollectionPause
aoqi@0	38
aoqi@0	39	class VM_G1OperationWithAllocRequest: public VM_GC_Operation {
aoqi@0	40	protected:
aoqi@0	41	size_t _word_size;
aoqi@0	42	HeapWord* _result;
aoqi@0	43	bool _pause_succeeded;
sjohanss@7118	44	AllocationContext_t _allocation_context;
aoqi@0	45
aoqi@0	46	public:
aoqi@0	47	VM_G1OperationWithAllocRequest(unsigned int gc_count_before,
aoqi@0	48	size_t word_size,
aoqi@0	49	GCCause::Cause gc_cause)
aoqi@0	50	: VM_GC_Operation(gc_count_before, gc_cause),
aoqi@0	51	_word_size(word_size), _result(NULL), _pause_succeeded(false) { }
aoqi@0	52	HeapWord* result() { return _result; }
aoqi@0	53	bool pause_succeeded() { return _pause_succeeded; }
sjohanss@7118	54	void set_allocation_context(AllocationContext_t context) { _allocation_context = context; }
sjohanss@7118	55	AllocationContext_t allocation_context() { return _allocation_context; }
aoqi@0	56	};
aoqi@0	57
aoqi@0	58	class VM_G1CollectFull: public VM_GC_Operation {
aoqi@0	59	public:
aoqi@0	60	VM_G1CollectFull(unsigned int gc_count_before,
aoqi@0	61	unsigned int full_gc_count_before,
aoqi@0	62	GCCause::Cause cause)
sjohanss@7285	63	: VM_GC_Operation(gc_count_before, cause, full_gc_count_before, true) { }
aoqi@0	64	virtual VMOp_Type type() const { return VMOp_G1CollectFull; }
aoqi@0	65	virtual void doit();
aoqi@0	66	virtual const char* name() const {
aoqi@0	67	return "full garbage-first collection";
aoqi@0	68	}
aoqi@0	69	};
aoqi@0	70
aoqi@0	71	class VM_G1CollectForAllocation: public VM_G1OperationWithAllocRequest {
aoqi@0	72	public:
aoqi@0	73	VM_G1CollectForAllocation(unsigned int gc_count_before,
aoqi@0	74	size_t word_size);
aoqi@0	75	virtual VMOp_Type type() const { return VMOp_G1CollectForAllocation; }
aoqi@0	76	virtual void doit();
aoqi@0	77	virtual const char* name() const {
aoqi@0	78	return "garbage-first collection to satisfy allocation";
aoqi@0	79	}
aoqi@0	80	};
aoqi@0	81
aoqi@0	82	class VM_G1IncCollectionPause: public VM_G1OperationWithAllocRequest {
aoqi@0	83	private:
aoqi@0	84	bool _should_initiate_conc_mark;
aoqi@0	85	bool _should_retry_gc;
aoqi@0	86	double _target_pause_time_ms;
aoqi@0	87	unsigned int _old_marking_cycles_completed_before;
aoqi@0	88	public:
aoqi@0	89	VM_G1IncCollectionPause(unsigned int gc_count_before,
aoqi@0	90	size_t word_size,
aoqi@0	91	bool should_initiate_conc_mark,
aoqi@0	92	double target_pause_time_ms,
aoqi@0	93	GCCause::Cause gc_cause);
aoqi@0	94	virtual VMOp_Type type() const { return VMOp_G1IncCollectionPause; }
aoqi@0	95	virtual bool doit_prologue();
aoqi@0	96	virtual void doit();
aoqi@0	97	virtual void doit_epilogue();
aoqi@0	98	virtual const char* name() const {
aoqi@0	99	return "garbage-first incremental collection pause";
aoqi@0	100	}
aoqi@0	101	bool should_retry_gc() const { return _should_retry_gc; }
aoqi@0	102	};
aoqi@0	103
aoqi@0	104	// Concurrent GC stop-the-world operations such as remark and cleanup;
aoqi@0	105	// consider sharing these with CMS's counterparts.
aoqi@0	106	class VM_CGC_Operation: public VM_Operation {
aoqi@0	107	VoidClosure* _cl;
aoqi@0	108	const char* _printGCMessage;
aoqi@0	109	bool _needs_pll;
aoqi@0	110
aoqi@0	111	protected:
aoqi@0	112	// java.lang.ref.Reference support
aoqi@0	113	void acquire_pending_list_lock();
aoqi@0	114	void release_and_notify_pending_list_lock();
aoqi@0	115
aoqi@0	116	public:
aoqi@0	117	VM_CGC_Operation(VoidClosure* cl, const char *printGCMsg, bool needs_pll)
aoqi@0	118	: _cl(cl), _printGCMessage(printGCMsg), _needs_pll(needs_pll) { }
aoqi@0	119	virtual VMOp_Type type() const { return VMOp_CGC_Operation; }
aoqi@0	120	virtual void doit();
aoqi@0	121	virtual bool doit_prologue();
aoqi@0	122	virtual void doit_epilogue();
aoqi@0	123	virtual const char* name() const {
aoqi@0	124	return "concurrent gc";
aoqi@0	125	}
aoqi@0	126	};
aoqi@0	127
aoqi@0	128	#endif // SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP