Mercurial > hg > graal-compiler
view src/share/vm/gc_implementation/parallelScavenge/asPSOldGen.hpp @ 2149:7e37af9d69ef
7011379: G1: overly long concurrent marking cycles
Summary: This changeset introduces filtering of SATB buffers at the point when they are about to be enqueued. If this filtering clears enough entries on each buffer, the buffer can then be re-used and not enqueued. This cuts down the number of SATB buffers that need to be processed by the concurrent marking threads.
Reviewed-by: johnc, ysr
author | tonyp |
---|---|
date | Wed, 19 Jan 2011 09:35:17 -0500 |
parents | f95d63e2154a |
children | f99cd6e20ab1 |
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/* * Copyright (c) 2003, 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. * */ #ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_ASPSOLDGEN_HPP #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_ASPSOLDGEN_HPP #include "gc_implementation/parallelScavenge/objectStartArray.hpp" #include "gc_implementation/parallelScavenge/psOldGen.hpp" #include "gc_implementation/parallelScavenge/psVirtualspace.hpp" #include "gc_implementation/shared/generationCounters.hpp" #include "gc_implementation/shared/mutableSpace.hpp" #include "gc_implementation/shared/spaceCounters.hpp" class ASPSOldGen : public PSOldGen { friend class VMStructs; size_t _gen_size_limit; // Largest size the generation's reserved size // can grow. public: ASPSOldGen(size_t initial_byte_size, size_t minimum_byte_size, size_t byte_size_limit, const char* gen_name, int level); ASPSOldGen(PSVirtualSpace* vs, size_t initial_byte_size, size_t minimum_byte_size, size_t byte_size_limit, const char* gen_name, int level); size_t gen_size_limit() { return _gen_size_limit; } size_t max_gen_size() { return _reserved.byte_size(); } void set_gen_size_limit(size_t v) { _gen_size_limit = v; } // After a shrink or expand reset the generation void reset_after_change(); // Return number of bytes that the virtual space in the generation is willing // to expand or contract. The results from these methods should feed into the // decisions about adjusting the virtual space. size_t available_for_expansion(); size_t available_for_contraction(); // Accessors void set_reserved(MemRegion v) { _reserved = v; } // Debugging support virtual const char* short_name() const { return "ASPSOldGen"; } }; #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_ASPSOLDGEN_HPP