Mercurial > hg > graal-compiler
view src/share/vm/memory/generationSpec.hpp @ 4836:d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
Summary: Remove the separate counting phase of concurrent marking by tracking the amount of marked bytes and the cards spanned by marked objects in marking task/worker thread local data structures, which are updated as individual objects are marked.
Reviewed-by: brutisso, tonyp
author | johnc |
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date | Thu, 12 Jan 2012 00:06:47 -0800 |
parents | f95d63e2154a |
children | d2a62e0f25eb |
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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. * */ #ifndef SHARE_VM_MEMORY_GENERATIONSPEC_HPP #define SHARE_VM_MEMORY_GENERATIONSPEC_HPP #include "memory/generation.hpp" #include "memory/permGen.hpp" // The specification of a generation. This class also encapsulates // some generation-specific behavior. This is done here rather than as a // virtual function of Generation because these methods are needed in // initialization of the Generations. class GenerationSpec : public CHeapObj { friend class VMStructs; private: Generation::Name _name; size_t _init_size; size_t _max_size; public: GenerationSpec(Generation::Name name, size_t init_size, size_t max_size) { _name = name; _init_size = init_size; _max_size = max_size; } Generation* init(ReservedSpace rs, int level, GenRemSet* remset); // Accessors Generation::Name name() const { return _name; } size_t init_size() const { return _init_size; } void set_init_size(size_t size) { _init_size = size; } size_t max_size() const { return _max_size; } void set_max_size(size_t size) { _max_size = size; } // Alignment void align(size_t alignment) { set_init_size(align_size_up(init_size(), alignment)); set_max_size(align_size_up(max_size(), alignment)); } // Return the number of regions contained in the generation which // might need to be independently covered by a remembered set. virtual int n_covered_regions() const { return 1; } }; typedef GenerationSpec* GenerationSpecPtr; // The specification of a permanent generation. This class is very // similar to GenerationSpec in use. Due to PermGen's not being a // true Generation, we cannot combine the spec classes either. class PermanentGenerationSpec : public CHeapObj { friend class VMStructs; private: 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; bool _enable_shared_spaces; enum { _n_spaces = 2 }; public: 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); PermGen* init(ReservedSpace rs, size_t init_size, GenRemSet* remset); void disable_sharing() { _enable_shared_spaces = false; _read_only_size = 0; _read_write_size = 0; _misc_data_size = 0; _misc_code_size = 0; } // Accessors PermGen::Name name() const { return _name; } size_t init_size() const { return _init_size; } void set_init_size(size_t size) { _init_size = size; } // Max size for user DOES NOT include shared spaces. // Max size for space allocation DOES include shared spaces. size_t max_size() const { return _max_size + _read_only_size + _read_write_size; } // Need one covered region for the main space, and one for the shared // spaces (together). int n_covered_regions() const { return 2; } void align(size_t alignment); size_t read_only_size() const { return _read_only_size; } size_t read_write_size() const { return _read_write_size; } size_t misc_data_size() const { return _misc_data_size; } size_t misc_code_size() const { return _misc_code_size; } bool enable_shared_spaces() const { return _enable_shared_spaces; } }; #endif // SHARE_VM_MEMORY_GENERATIONSPEC_HPP