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src/share/vm/gc_implementation/concurrentMarkSweep/cmsCollectorPolicy.cpp@8b10f48633dc (annotated)

src/share/vm/gc_implementation/concurrentMarkSweep/cmsCollectorPolicy.cpp

Mon, 20 Sep 2010 14:38:38 -0700

author

jmasa

date

Mon, 20 Sep 2010 14:38:38 -0700

changeset 2188

8b10f48633dc

parent 1907

c18cbe5936b8

child 2314

f95d63e2154a

permissions

-rw-r--r--

6984287: Regularize how GC parallel workers are specified.
Summary: Associate number of GC workers with the workgang as opposed to the task.
Reviewed-by: johnc, ysr

duke@435	1	/*
jmasa@2188	2	* Copyright (c) 2007, 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
duke@435	25	# include "incls/_precompiled.incl"
duke@435	26	# include "incls/_cmsCollectorPolicy.cpp.incl"
duke@435	27
duke@435	28	//
duke@435	29	// ConcurrentMarkSweepPolicy methods
duke@435	30	//
duke@435	31
duke@435	32	ConcurrentMarkSweepPolicy::ConcurrentMarkSweepPolicy() {
duke@435	33	initialize_all();
duke@435	34	}
duke@435	35
duke@435	36	void ConcurrentMarkSweepPolicy::initialize_generations() {
duke@435	37	initialize_perm_generation(PermGen::ConcurrentMarkSweep);
duke@435	38	_generations = new GenerationSpecPtr[number_of_generations()];
duke@435	39	if (_generations == NULL)
duke@435	40	vm_exit_during_initialization("Unable to allocate gen spec");
duke@435	41
jmasa@2188	42	if (ParNewGeneration::in_use()) {
duke@435	43	if (UseAdaptiveSizePolicy) {
duke@435	44	_generations[0] = new GenerationSpec(Generation::ASParNew,
duke@435	45	_initial_gen0_size, _max_gen0_size);
duke@435	46	} else {
duke@435	47	_generations[0] = new GenerationSpec(Generation::ParNew,
duke@435	48	_initial_gen0_size, _max_gen0_size);
duke@435	49	}
duke@435	50	} else {
duke@435	51	_generations[0] = new GenerationSpec(Generation::DefNew,
duke@435	52	_initial_gen0_size, _max_gen0_size);
duke@435	53	}
duke@435	54	if (UseAdaptiveSizePolicy) {
duke@435	55	_generations[1] = new GenerationSpec(Generation::ASConcurrentMarkSweep,
duke@435	56	_initial_gen1_size, _max_gen1_size);
duke@435	57	} else {
duke@435	58	_generations[1] = new GenerationSpec(Generation::ConcurrentMarkSweep,
duke@435	59	_initial_gen1_size, _max_gen1_size);
duke@435	60	}
duke@435	61
duke@435	62	if (_generations[0] == NULL || _generations[1] == NULL) {
duke@435	63	vm_exit_during_initialization("Unable to allocate gen spec");
duke@435	64	}
duke@435	65	}
duke@435	66
duke@435	67	void ConcurrentMarkSweepPolicy::initialize_size_policy(size_t init_eden_size,
duke@435	68	size_t init_promo_size,
duke@435	69	size_t init_survivor_size) {
duke@435	70	double max_gc_minor_pause_sec = ((double) MaxGCMinorPauseMillis)/1000.0;
duke@435	71	double max_gc_pause_sec = ((double) MaxGCPauseMillis)/1000.0;
duke@435	72	_size_policy = new CMSAdaptiveSizePolicy(init_eden_size,
duke@435	73	init_promo_size,
duke@435	74	init_survivor_size,
duke@435	75	max_gc_minor_pause_sec,
duke@435	76	max_gc_pause_sec,
duke@435	77	GCTimeRatio);
duke@435	78	}
duke@435	79
duke@435	80	void ConcurrentMarkSweepPolicy::initialize_gc_policy_counters() {
duke@435	81	// initialize the policy counters - 2 collectors, 3 generations
jmasa@2188	82	if (ParNewGeneration::in_use()) {
duke@435	83	_gc_policy_counters = new GCPolicyCounters("ParNew:CMS", 2, 3);
duke@435	84	}
duke@435	85	else {
duke@435	86	_gc_policy_counters = new GCPolicyCounters("Copy:CMS", 2, 3);
duke@435	87	}
duke@435	88	}
duke@435	89
duke@435	90	// Returns true if the incremental mode is enabled.
duke@435	91	bool ConcurrentMarkSweepPolicy::has_soft_ended_eden()
duke@435	92	{
duke@435	93	return CMSIncrementalMode;
duke@435	94	}
duke@435	95
duke@435	96
duke@435	97	//
duke@435	98	// ASConcurrentMarkSweepPolicy methods
duke@435	99	//
duke@435	100
duke@435	101	void ASConcurrentMarkSweepPolicy::initialize_gc_policy_counters() {
duke@435	102
duke@435	103	assert(size_policy() != NULL, "A size policy is required");
duke@435	104	// initialize the policy counters - 2 collectors, 3 generations
jmasa@2188	105	if (ParNewGeneration::in_use()) {
duke@435	106	_gc_policy_counters = new CMSGCAdaptivePolicyCounters("ParNew:CMS", 2, 3,
duke@435	107	size_policy());
duke@435	108	}
duke@435	109	else {
duke@435	110	_gc_policy_counters = new CMSGCAdaptivePolicyCounters("Copy:CMS", 2, 3,
duke@435	111	size_policy());
duke@435	112	}
duke@435	113	}