• file
• revisions
• annotate
• diff
• comparison
• raw

src/share/vm/gc_implementation/parallelScavenge/generationSizer.hpp@0f773163217d (annotated)

src/share/vm/gc_implementation/parallelScavenge/generationSizer.hpp

Thu, 11 Dec 2008 12:05:21 -0800

author

jcoomes

date

Thu, 11 Dec 2008 12:05:21 -0800

changeset 918

0f773163217d

parent 631

d1605aabd0a1

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6765954: par compact - stress mode for splitting young gen spaces
Reviewed-by: jmasa

duke@435	1	/*
xdono@631	2	* Copyright 2001-2008 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	// There is a nice batch of tested generation sizing code in
duke@435	26	// TwoGenerationCollectorPolicy. Lets reuse it!
duke@435	27
duke@435	28	class GenerationSizer : public TwoGenerationCollectorPolicy {
duke@435	29	public:
duke@435	30	GenerationSizer() {
duke@435	31	// Partial init only!
duke@435	32	initialize_flags();
duke@435	33	initialize_size_info();
duke@435	34	}
duke@435	35
duke@435	36	void initialize_flags() {
duke@435	37	// Do basic sizing work
duke@435	38	this->TwoGenerationCollectorPolicy::initialize_flags();
duke@435	39
duke@435	40	// If the user hasn't explicitly set the number of worker
duke@435	41	// threads, set the count.
jmasa@445	42	assert(UseSerialGC ||
jmasa@445	43	!FLAG_IS_DEFAULT(ParallelGCThreads) ||
jmasa@445	44	(ParallelGCThreads > 0),
jmasa@445	45	"ParallelGCThreads should be set before flag initialization");
duke@435	46
duke@435	47	// The survivor ratio's are calculated "raw", unlike the
duke@435	48	// default gc, which adds 2 to the ratio value. We need to
duke@435	49	// make sure the values are valid before using them.
duke@435	50	if (MinSurvivorRatio < 3) {
duke@435	51	MinSurvivorRatio = 3;
duke@435	52	}
duke@435	53
duke@435	54	if (InitialSurvivorRatio < 3) {
duke@435	55	InitialSurvivorRatio = 3;
duke@435	56	}
duke@435	57	}
duke@435	58
duke@435	59	size_t min_young_gen_size() { return _min_gen0_size; }
duke@435	60	size_t young_gen_size() { return _initial_gen0_size; }
duke@435	61	size_t max_young_gen_size() { return _max_gen0_size; }
duke@435	62
duke@435	63	size_t min_old_gen_size() { return _min_gen1_size; }
duke@435	64	size_t old_gen_size() { return _initial_gen1_size; }
duke@435	65	size_t max_old_gen_size() { return _max_gen1_size; }
duke@435	66
duke@435	67	size_t perm_gen_size() { return PermSize; }
duke@435	68	size_t max_perm_gen_size() { return MaxPermSize; }
duke@435	69	};