Mercurial > hg > truffle
view src/share/vm/gc_implementation/shared/gcPolicyCounters.hpp @ 534:5cfd8d19e546
6786503: Overflow list performance can be improved
Summary: Avoid overflow list walk in CMS & ParNew when it is unnecessary. Fix a couple of correctness issues, including a C-heap leak, in ParNew at the intersection of promotion failure, work queue overflow and object array chunking. Add stress testing option and related assertion checking.
Reviewed-by: jmasa
author | ysr |
---|---|
date | Mon, 26 Jan 2009 12:47:21 -0800 |
parents | a61af66fc99e |
children | c18cbe5936b8 |
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/* * Copyright 2002-2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ // GCPolicyCounters is a holder class for performance counters // that track a generation class GCPolicyCounters: public CHeapObj { friend class VMStructs; private: // Constant PerfData types don't need to retain a reference. // However, it's a good idea to document them here. // PerfStringConstant* _name; // PerfStringConstant* _collector_size; // PerfStringConstant* _generation_size; PerfVariable* _tenuring_threshold; PerfVariable* _desired_survivor_size; const char* _name_space; public: enum Name { NONE, GCPolicyCountersKind, GCAdaptivePolicyCountersKind, PSGCAdaptivePolicyCountersKind, CMSGCAdaptivePolicyCountersKind }; GCPolicyCounters(const char* name, int collectors, int generations); inline PerfVariable* tenuring_threshold() const { return _tenuring_threshold; } inline PerfVariable* desired_survivor_size() const { return _desired_survivor_size; } const char* name_space() const { return _name_space; } virtual void update_counters() {} virtual GCPolicyCounters::Name kind() const { return GCPolicyCounters::GCPolicyCountersKind; } };