Mercurial > hg > graal-compiler
view src/share/vm/prims/jvmtiManageCapabilities.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 |
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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_PRIMS_JVMTIMANAGECAPABILITIES_HPP #define SHARE_VM_PRIMS_JVMTIMANAGECAPABILITIES_HPP #include "jvmtifiles/jvmti.h" #include "memory/allocation.hpp" class JvmtiManageCapabilities : public AllStatic { private: // these four capabilities sets represent all potentially // available capabilities. They are disjoint, covering // the four cases: (OnLoad vs OnLoad+live phase) X // (one environment vs any environment). static jvmtiCapabilities always_capabilities; static jvmtiCapabilities onload_capabilities; static jvmtiCapabilities always_solo_capabilities; static jvmtiCapabilities onload_solo_capabilities; // solo capabilities that have not been grabbed static jvmtiCapabilities always_solo_remaining_capabilities; static jvmtiCapabilities onload_solo_remaining_capabilities; // all capabilities ever acquired static jvmtiCapabilities acquired_capabilities; // basic intenal operations static jvmtiCapabilities *either(const jvmtiCapabilities *a, const jvmtiCapabilities *b, jvmtiCapabilities *result); static jvmtiCapabilities *both(const jvmtiCapabilities *a, const jvmtiCapabilities *b, jvmtiCapabilities *result); static jvmtiCapabilities *exclude(const jvmtiCapabilities *a, const jvmtiCapabilities *b, jvmtiCapabilities *result); static bool has_some(const jvmtiCapabilities *a); static void update(); // init functions static jvmtiCapabilities init_always_capabilities(); static jvmtiCapabilities init_onload_capabilities(); static jvmtiCapabilities init_always_solo_capabilities(); static jvmtiCapabilities init_onload_solo_capabilities(); public: static void initialize(); // may have to adjust always capabilities when VM initialization has completed static void recompute_always_capabilities(); // queries and actions static void get_potential_capabilities(const jvmtiCapabilities *current, const jvmtiCapabilities *prohibited, jvmtiCapabilities *result); static jvmtiError add_capabilities(const jvmtiCapabilities *current, const jvmtiCapabilities *prohibited, const jvmtiCapabilities *desired, jvmtiCapabilities *result); static void relinquish_capabilities(const jvmtiCapabilities *current, const jvmtiCapabilities *unwanted, jvmtiCapabilities *result); static void copy_capabilities(const jvmtiCapabilities *from, jvmtiCapabilities *to); #ifndef PRODUCT static void print(const jvmtiCapabilities* caps); #endif }; #endif // SHARE_VM_PRIMS_JVMTIMANAGECAPABILITIES_HPP