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src/share/vm/gc_implementation/shared/generationCounters.hpp@ba764ed4b6f2 (annotated)

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

Sun, 13 Apr 2008 17:43:42 -0400

author

coleenp

date

Sun, 13 Apr 2008 17:43:42 -0400

changeset 548

ba764ed4b6f2

parent 435

a61af66fc99e

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
Summary: Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv
Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold

duke@435	1	/*
duke@435	2	* Copyright 2002-2004 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	// A GenerationCounter is a holder class for performance counters
duke@435	26	// that track a generation
duke@435	27
duke@435	28	class GenerationCounters: public CHeapObj {
duke@435	29	friend class VMStructs;
duke@435	30
duke@435	31	protected:
duke@435	32	PerfVariable* _current_size;
duke@435	33	VirtualSpace* _virtual_space;
duke@435	34
duke@435	35	// Constant PerfData types don't need to retain a reference.
duke@435	36	// However, it's a good idea to document them here.
duke@435	37	// PerfStringConstant* _name;
duke@435	38	// PerfConstant* _min_size;
duke@435	39	// PerfConstant* _max_size;
duke@435	40	// PerfConstant* _spaces;
duke@435	41
duke@435	42	char* _name_space;
duke@435	43
duke@435	44	// This constructor is only meant for use with the PSGenerationCounters
duke@435	45	// constructor. The need for such an constructor should be eliminated
duke@435	46	// when VirtualSpace and PSVirtualSpace are unified.
duke@435	47	GenerationCounters() : _name_space(NULL), _current_size(NULL), _virtual_space(NULL) {}
duke@435	48	public:
duke@435	49
duke@435	50	GenerationCounters(const char* name, int ordinal, int spaces,
duke@435	51	VirtualSpace* v);
duke@435	52
duke@435	53	~GenerationCounters() {
duke@435	54	if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space);
duke@435	55	}
duke@435	56
duke@435	57	virtual void update_all() {
duke@435	58	_current_size->set_value(_virtual_space->committed_size());
duke@435	59	}
duke@435	60
duke@435	61	const char* name_space() const { return _name_space; }
duke@435	62	};