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src/share/vm/gc_implementation/shared/hSpaceCounters.hpp@f90c822e73f8 (annotated)

src/share/vm/gc_implementation/shared/hSpaceCounters.hpp

Wed, 27 Apr 2016 01:25:04 +0800

author

aoqi

date

Wed, 27 Apr 2016 01:25:04 +0800

changeset 0

f90c822e73f8

child 6876

710a3c8b516e

permissions

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http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2011, 2013, 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_SHARED_HSPACECOUNTERS_HPP
aoqi@0	26	#define SHARE_VM_GC_IMPLEMENTATION_SHARED_HSPACECOUNTERS_HPP
aoqi@0	27
aoqi@0	28	#include "utilities/macros.hpp"
aoqi@0	29	#include "gc_implementation/shared/generationCounters.hpp"
aoqi@0	30	#include "memory/generation.hpp"
aoqi@0	31	#include "runtime/perfData.hpp"
aoqi@0	32
aoqi@0	33	// A HSpaceCounter is a holder class for performance counters
aoqi@0	34	// that track a collections (logical spaces) in a heap;
aoqi@0	35
aoqi@0	36	class HeapSpaceUsedHelper;
aoqi@0	37	class G1SpaceMonitoringSupport;
aoqi@0	38
aoqi@0	39	class HSpaceCounters: public CHeapObj<mtGC> {
aoqi@0	40	friend class VMStructs;
aoqi@0	41
aoqi@0	42	private:
aoqi@0	43	PerfVariable* _capacity;
aoqi@0	44	PerfVariable* _used;
aoqi@0	45
aoqi@0	46	// Constant PerfData types don't need to retain a reference.
aoqi@0	47	// However, it's a good idea to document them here.
aoqi@0	48
aoqi@0	49	char* _name_space;
aoqi@0	50
aoqi@0	51	public:
aoqi@0	52
aoqi@0	53	HSpaceCounters(const char* name, int ordinal, size_t max_size,
aoqi@0	54	size_t initial_capacity, GenerationCounters* gc);
aoqi@0	55
aoqi@0	56	~HSpaceCounters() {
aoqi@0	57	if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space, mtGC);
aoqi@0	58	}
aoqi@0	59
aoqi@0	60	inline void update_capacity(size_t v) {
aoqi@0	61	_capacity->set_value(v);
aoqi@0	62	}
aoqi@0	63
aoqi@0	64	inline void update_used(size_t v) {
aoqi@0	65	_used->set_value(v);
aoqi@0	66	}
aoqi@0	67
aoqi@0	68	debug_only(
aoqi@0	69	// for security reasons, we do not allow arbitrary reads from
aoqi@0	70	// the counters as they may live in shared memory.
aoqi@0	71	jlong used() {
aoqi@0	72	return _used->get_value();
aoqi@0	73	}
aoqi@0	74	jlong capacity() {
aoqi@0	75	return _used->get_value();
aoqi@0	76	}
aoqi@0	77	)
aoqi@0	78
aoqi@0	79	inline void update_all(size_t capacity, size_t used) {
aoqi@0	80	update_capacity(capacity);
aoqi@0	81	update_used(used);
aoqi@0	82	}
aoqi@0	83
aoqi@0	84	const char* name_space() const { return _name_space; }
aoqi@0	85	};
aoqi@0	86	#endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_HSPACECOUNTERS_HPP