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src/share/vm/memory/generationSpec.cpp@d903bf750e9f (annotated)

src/share/vm/memory/generationSpec.cpp

Wed, 18 Jan 2012 09:50:16 -0800

author

johnc

date

Wed, 18 Jan 2012 09:50:16 -0800

changeset 3538

d903bf750e9f

parent 2314

f95d63e2154a

child 3730

9f059abe8cf2

permissions

-rw-r--r--

7129514: time warp warnings after 7117303
Summary: Replace calls to os::javaTimeMillis() that are used to update the milliseconds since the last GC to an equivalent that uses a monotonically non-decreasing time source.
Reviewed-by: ysr, jmasa

duke@435	1	/*
stefank@2314	2	* Copyright (c) 2001, 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
stefank@2314	25	#include "precompiled.hpp"
stefank@2314	26	#include "memory/compactPermGen.hpp"
stefank@2314	27	#include "memory/defNewGeneration.hpp"
stefank@2314	28	#include "memory/filemap.hpp"
stefank@2314	29	#include "memory/genRemSet.hpp"
stefank@2314	30	#include "memory/generationSpec.hpp"
stefank@2314	31	#include "memory/tenuredGeneration.hpp"
stefank@2314	32	#include "runtime/java.hpp"
stefank@2314	33	#ifndef SERIALGC
stefank@2314	34	#include "gc_implementation/concurrentMarkSweep/cmsPermGen.hpp"
stefank@2314	35	#include "gc_implementation/parNew/asParNewGeneration.hpp"
stefank@2314	36	#include "gc_implementation/parNew/parNewGeneration.hpp"
stefank@2314	37	#endif
duke@435	38
duke@435	39	Generation* GenerationSpec::init(ReservedSpace rs, int level,
duke@435	40	GenRemSet* remset) {
duke@435	41	switch (name()) {
duke@435	42	case Generation::DefNew:
duke@435	43	return new DefNewGeneration(rs, init_size(), level);
duke@435	44
duke@435	45	case Generation::MarkSweepCompact:
duke@435	46	return new TenuredGeneration(rs, init_size(), level, remset);
duke@435	47
duke@435	48	#ifndef SERIALGC
duke@435	49	case Generation::ParNew:
duke@435	50	return new ParNewGeneration(rs, init_size(), level);
duke@435	51
duke@435	52	case Generation::ASParNew:
duke@435	53	return new ASParNewGeneration(rs,
duke@435	54	init_size(),
duke@435	55	init_size() /* min size */,
duke@435	56	level);
duke@435	57
duke@435	58	case Generation::ConcurrentMarkSweep: {
duke@435	59	assert(UseConcMarkSweepGC, "UseConcMarkSweepGC should be set");
duke@435	60	CardTableRS* ctrs = remset->as_CardTableRS();
duke@435	61	if (ctrs == NULL) {
duke@435	62	vm_exit_during_initialization("Rem set incompatibility.");
duke@435	63	}
duke@435	64	// Otherwise
duke@435	65	// The constructor creates the CMSCollector if needed,
duke@435	66	// else registers with an existing CMSCollector
duke@435	67
duke@435	68	ConcurrentMarkSweepGeneration* g = NULL;
duke@435	69	g = new ConcurrentMarkSweepGeneration(rs,
duke@435	70	init_size(), level, ctrs, UseCMSAdaptiveFreeLists,
duke@435	71	(FreeBlockDictionary::DictionaryChoice)CMSDictionaryChoice);
duke@435	72
duke@435	73	g->initialize_performance_counters();
duke@435	74
duke@435	75	return g;
duke@435	76	}
duke@435	77
duke@435	78	case Generation::ASConcurrentMarkSweep: {
duke@435	79	assert(UseConcMarkSweepGC, "UseConcMarkSweepGC should be set");
duke@435	80	CardTableRS* ctrs = remset->as_CardTableRS();
duke@435	81	if (ctrs == NULL) {
duke@435	82	vm_exit_during_initialization("Rem set incompatibility.");
duke@435	83	}
duke@435	84	// Otherwise
duke@435	85	// The constructor creates the CMSCollector if needed,
duke@435	86	// else registers with an existing CMSCollector
duke@435	87
duke@435	88	ASConcurrentMarkSweepGeneration* g = NULL;
duke@435	89	g = new ASConcurrentMarkSweepGeneration(rs,
duke@435	90	init_size(), level, ctrs, UseCMSAdaptiveFreeLists,
duke@435	91	(FreeBlockDictionary::DictionaryChoice)CMSDictionaryChoice);
duke@435	92
duke@435	93	g->initialize_performance_counters();
duke@435	94
duke@435	95	return g;
duke@435	96	}
duke@435	97	#endif // SERIALGC
duke@435	98
duke@435	99	default:
duke@435	100	guarantee(false, "unrecognized GenerationName");
duke@435	101	return NULL;
duke@435	102	}
duke@435	103	}
duke@435	104
duke@435	105
duke@435	106	PermanentGenerationSpec::PermanentGenerationSpec(PermGen::Name name,
duke@435	107	size_t init_size, size_t max_size,
duke@435	108	size_t read_only_size, size_t read_write_size,
duke@435	109	size_t misc_data_size, size_t misc_code_size) {
duke@435	110	_name = name;
duke@435	111	_init_size = init_size;
duke@435	112
duke@435	113	if (UseSharedSpaces || DumpSharedSpaces) {
duke@435	114	_enable_shared_spaces = true;
duke@435	115	if (UseSharedSpaces) {
duke@435	116	// Override shared space sizes from those in the file.
duke@435	117	FileMapInfo* mapinfo = FileMapInfo::current_info();
duke@435	118	_read_only_size = mapinfo->space_capacity(CompactingPermGenGen::ro);
duke@435	119	_read_write_size = mapinfo->space_capacity(CompactingPermGenGen::rw);
duke@435	120	_misc_data_size = mapinfo->space_capacity(CompactingPermGenGen::md);
duke@435	121	_misc_code_size = mapinfo->space_capacity(CompactingPermGenGen::mc);
duke@435	122	} else {
duke@435	123	_read_only_size = read_only_size;
duke@435	124	_read_write_size = read_write_size;
duke@435	125	_misc_data_size = misc_data_size;
duke@435	126	_misc_code_size = misc_code_size;
duke@435	127	}
duke@435	128	} else {
duke@435	129	_enable_shared_spaces = false;
duke@435	130	_read_only_size = 0;
duke@435	131	_read_write_size = 0;
duke@435	132	_misc_data_size = 0;
duke@435	133	_misc_code_size = 0;
duke@435	134	}
duke@435	135
duke@435	136	_max_size = max_size;
duke@435	137	}
duke@435	138
duke@435	139
duke@435	140	PermGen* PermanentGenerationSpec::init(ReservedSpace rs,
duke@435	141	size_t init_size,
duke@435	142	GenRemSet *remset) {
duke@435	143
duke@435	144	// Break the reserved spaces into pieces for the permanent space
duke@435	145	// and the shared spaces.
duke@435	146	ReservedSpace perm_rs = rs.first_part(_max_size, UseSharedSpaces,
duke@435	147	UseSharedSpaces);
duke@435	148	ReservedSpace shared_rs = rs.last_part(_max_size);
duke@435	149
duke@435	150	if (enable_shared_spaces()) {
duke@435	151	if (!perm_rs.is_reserved() ||
duke@435	152	perm_rs.base() + perm_rs.size() != shared_rs.base()) {
duke@435	153	FileMapInfo* mapinfo = FileMapInfo::current_info();
duke@435	154	mapinfo->fail_continue("Sharing disabled - unable to "
duke@435	155	"reserve address space.");
duke@435	156	shared_rs.release();
duke@435	157	disable_sharing();
duke@435	158	}
duke@435	159	}
duke@435	160
duke@435	161	switch (name()) {
duke@435	162	case PermGen::MarkSweepCompact:
duke@435	163	return new CompactingPermGen(perm_rs, shared_rs, init_size, remset, this);
duke@435	164
duke@435	165	#ifndef SERIALGC
duke@435	166	case PermGen::MarkSweep:
duke@435	167	guarantee(false, "NYI");
duke@435	168	return NULL;
duke@435	169
duke@435	170	case PermGen::ConcurrentMarkSweep: {
duke@435	171	assert(UseConcMarkSweepGC, "UseConcMarkSweepGC should be set");
duke@435	172	CardTableRS* ctrs = remset->as_CardTableRS();
duke@435	173	if (ctrs == NULL) {
duke@435	174	vm_exit_during_initialization("RemSet/generation incompatibility.");
duke@435	175	}
duke@435	176	// XXXPERM
duke@435	177	return new CMSPermGen(perm_rs, init_size, ctrs,
duke@435	178	(FreeBlockDictionary::DictionaryChoice)CMSDictionaryChoice);
duke@435	179	}
duke@435	180	#endif // SERIALGC
duke@435	181	default:
duke@435	182	guarantee(false, "unrecognized GenerationName");
duke@435	183	return NULL;
duke@435	184	}
duke@435	185	}
duke@435	186
duke@435	187
duke@435	188	// Alignment
duke@435	189	void PermanentGenerationSpec::align(size_t alignment) {
duke@435	190	_init_size = align_size_up(_init_size, alignment);
duke@435	191	_max_size = align_size_up(_max_size, alignment);
duke@435	192	_read_only_size = align_size_up(_read_only_size, alignment);
duke@435	193	_read_write_size = align_size_up(_read_write_size, alignment);
duke@435	194	_misc_data_size = align_size_up(_misc_data_size, alignment);
duke@435	195	_misc_code_size = align_size_up(_misc_code_size, alignment);
duke@435	196
duke@435	197	assert(enable_shared_spaces() || (_read_only_size + _read_write_size == 0),
duke@435	198	"Shared space when disabled?");
duke@435	199	}