Mercurial > hg > graal-compiler
view src/share/vm/memory/classify.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 |
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date | Wed, 19 Jan 2011 09:35:17 -0500 |
parents | f95d63e2154a |
children |
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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_MEMORY_CLASSIFY_HPP #define SHARE_VM_MEMORY_CLASSIFY_HPP #include "oops/oop.inline.hpp" typedef enum oop_type { unknown_type, instance_type, instanceRef_type, objArray_type, symbol_type, klass_type, instanceKlass_type, method_type, constMethod_type, methodData_type, constantPool_type, constantPoolCache_type, typeArray_type, compiledICHolder_type, number_object_types } object_type; // Classify objects by type and keep counts. // Print the count and space taken for each type. class ClassifyObjectClosure : public ObjectClosure { private: static const char* object_type_name[number_object_types]; int total_object_count; size_t total_object_size; int object_count[number_object_types]; size_t object_size[number_object_types]; public: ClassifyObjectClosure() { reset(); } void reset(); void do_object(oop obj); static object_type classify_object(oop obj, bool count); size_t print(); }; // Count objects using the alloc_count field in the object's klass // object. class ClassifyInstanceKlassClosure : public ClassifyObjectClosure { private: int total_instances; public: ClassifyInstanceKlassClosure() { reset(); } void reset(); void print(); void do_object(oop obj); }; // Clear the alloc_count fields in all classes so that the count can be // restarted. class ClearAllocCountClosure : public ObjectClosure { public: void do_object(oop obj) { if (obj->is_klass()) { Klass* k = Klass::cast((klassOop)obj); k->set_alloc_count(0); } } }; #endif // SHARE_VM_MEMORY_CLASSIFY_HPP