Mercurial > hg > graal-jvmci-8
view src/share/vm/memory/generationSpec.cpp @ 1994:6cd6d394f280
7001033: assert(gch->gc_cause() == GCCause::_scavenge_alot || !gch->incremental_collection_failed())
7002546: regression on SpecJbb2005 on 7b118 comparing to 7b117 on small heaps
Summary: Relaxed assertion checking related to incremental_collection_failed flag to allow for ExplicitGCInvokesConcurrent behaviour where we do not want a failing scavenge to bail to a stop-world collection. Parameterized incremental_collection_will_fail() so we can selectively use, or not use, as appropriate, the statistical prediction at specific use sites. This essentially reverts the scavenge bail-out logic to what it was prior to some recent changes that had inadvertently started using the statistical prediction which can be noisy in the presence of bursty loads. Added some associated verbose non-product debugging messages.
Reviewed-by: johnc, tonyp
author | ysr |
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date | Tue, 07 Dec 2010 21:55:53 -0800 |
parents | f95d63e2154a |
children | 9f059abe8cf2 |
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/* * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "memory/compactPermGen.hpp" #include "memory/defNewGeneration.hpp" #include "memory/filemap.hpp" #include "memory/genRemSet.hpp" #include "memory/generationSpec.hpp" #include "memory/tenuredGeneration.hpp" #include "runtime/java.hpp" #ifndef SERIALGC #include "gc_implementation/concurrentMarkSweep/cmsPermGen.hpp" #include "gc_implementation/parNew/asParNewGeneration.hpp" #include "gc_implementation/parNew/parNewGeneration.hpp" #endif Generation* GenerationSpec::init(ReservedSpace rs, int level, GenRemSet* remset) { switch (name()) { case Generation::DefNew: return new DefNewGeneration(rs, init_size(), level); case Generation::MarkSweepCompact: return new TenuredGeneration(rs, init_size(), level, remset); #ifndef SERIALGC case Generation::ParNew: return new ParNewGeneration(rs, init_size(), level); case Generation::ASParNew: return new ASParNewGeneration(rs, init_size(), init_size() /* min size */, level); case Generation::ConcurrentMarkSweep: { assert(UseConcMarkSweepGC, "UseConcMarkSweepGC should be set"); CardTableRS* ctrs = remset->as_CardTableRS(); if (ctrs == NULL) { vm_exit_during_initialization("Rem set incompatibility."); } // Otherwise // The constructor creates the CMSCollector if needed, // else registers with an existing CMSCollector ConcurrentMarkSweepGeneration* g = NULL; g = new ConcurrentMarkSweepGeneration(rs, init_size(), level, ctrs, UseCMSAdaptiveFreeLists, (FreeBlockDictionary::DictionaryChoice)CMSDictionaryChoice); g->initialize_performance_counters(); return g; } case Generation::ASConcurrentMarkSweep: { assert(UseConcMarkSweepGC, "UseConcMarkSweepGC should be set"); CardTableRS* ctrs = remset->as_CardTableRS(); if (ctrs == NULL) { vm_exit_during_initialization("Rem set incompatibility."); } // Otherwise // The constructor creates the CMSCollector if needed, // else registers with an existing CMSCollector ASConcurrentMarkSweepGeneration* g = NULL; g = new ASConcurrentMarkSweepGeneration(rs, init_size(), level, ctrs, UseCMSAdaptiveFreeLists, (FreeBlockDictionary::DictionaryChoice)CMSDictionaryChoice); g->initialize_performance_counters(); return g; } #endif // SERIALGC default: guarantee(false, "unrecognized GenerationName"); return NULL; } } PermanentGenerationSpec::PermanentGenerationSpec(PermGen::Name name, size_t init_size, size_t max_size, size_t read_only_size, size_t read_write_size, size_t misc_data_size, size_t misc_code_size) { _name = name; _init_size = init_size; if (UseSharedSpaces || DumpSharedSpaces) { _enable_shared_spaces = true; if (UseSharedSpaces) { // Override shared space sizes from those in the file. FileMapInfo* mapinfo = FileMapInfo::current_info(); _read_only_size = mapinfo->space_capacity(CompactingPermGenGen::ro); _read_write_size = mapinfo->space_capacity(CompactingPermGenGen::rw); _misc_data_size = mapinfo->space_capacity(CompactingPermGenGen::md); _misc_code_size = mapinfo->space_capacity(CompactingPermGenGen::mc); } else { _read_only_size = read_only_size; _read_write_size = read_write_size; _misc_data_size = misc_data_size; _misc_code_size = misc_code_size; } } else { _enable_shared_spaces = false; _read_only_size = 0; _read_write_size = 0; _misc_data_size = 0; _misc_code_size = 0; } _max_size = max_size; } PermGen* PermanentGenerationSpec::init(ReservedSpace rs, size_t init_size, GenRemSet *remset) { // Break the reserved spaces into pieces for the permanent space // and the shared spaces. ReservedSpace perm_rs = rs.first_part(_max_size, UseSharedSpaces, UseSharedSpaces); ReservedSpace shared_rs = rs.last_part(_max_size); if (enable_shared_spaces()) { if (!perm_rs.is_reserved() || perm_rs.base() + perm_rs.size() != shared_rs.base()) { FileMapInfo* mapinfo = FileMapInfo::current_info(); mapinfo->fail_continue("Sharing disabled - unable to " "reserve address space."); shared_rs.release(); disable_sharing(); } } switch (name()) { case PermGen::MarkSweepCompact: return new CompactingPermGen(perm_rs, shared_rs, init_size, remset, this); #ifndef SERIALGC case PermGen::MarkSweep: guarantee(false, "NYI"); return NULL; case PermGen::ConcurrentMarkSweep: { assert(UseConcMarkSweepGC, "UseConcMarkSweepGC should be set"); CardTableRS* ctrs = remset->as_CardTableRS(); if (ctrs == NULL) { vm_exit_during_initialization("RemSet/generation incompatibility."); } // XXXPERM return new CMSPermGen(perm_rs, init_size, ctrs, (FreeBlockDictionary::DictionaryChoice)CMSDictionaryChoice); } #endif // SERIALGC default: guarantee(false, "unrecognized GenerationName"); return NULL; } } // Alignment void PermanentGenerationSpec::align(size_t alignment) { _init_size = align_size_up(_init_size, alignment); _max_size = align_size_up(_max_size, alignment); _read_only_size = align_size_up(_read_only_size, alignment); _read_write_size = align_size_up(_read_write_size, alignment); _misc_data_size = align_size_up(_misc_data_size, alignment); _misc_code_size = align_size_up(_misc_code_size, alignment); assert(enable_shared_spaces() || (_read_only_size + _read_write_size == 0), "Shared space when disabled?"); }