Mercurial > hg > graal-jvmci-8
view src/share/vm/gc_implementation/shared/collectorCounters.hpp @ 1656:4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
Summary: G1 was not handling explicit GCs correctly in many ways. It does now. See the CR for the list of improvements contained in this changeset.
Reviewed-by: iveresov, ysr, johnc
author | tonyp |
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date | Mon, 28 Jun 2010 14:13:17 -0400 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
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/* * Copyright (c) 2002, 2004, 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. * */ // CollectorCounters is a holder class for performance counters // that track a collector class CollectorCounters: public CHeapObj { friend class VMStructs; private: PerfCounter* _invocations; PerfCounter* _time; PerfVariable* _last_entry_time; PerfVariable* _last_exit_time; // Constant PerfData types don't need to retain a reference. // However, it's a good idea to document them here. // PerfStringConstant* _name; char* _name_space; public: CollectorCounters(const char* name, int ordinal); ~CollectorCounters() { if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space); } inline PerfCounter* invocation_counter() const { return _invocations; } inline PerfCounter* time_counter() const { return _time; } inline PerfVariable* last_entry_counter() const { return _last_entry_time; } inline PerfVariable* last_exit_counter() const { return _last_exit_time; } const char* name_space() const { return _name_space; } }; class TraceCollectorStats: public PerfTraceTimedEvent { protected: CollectorCounters* _c; public: inline TraceCollectorStats(CollectorCounters* c) : PerfTraceTimedEvent(c->time_counter(), c->invocation_counter()), _c(c) { if (UsePerfData) { _c->last_entry_counter()->set_value(os::elapsed_counter()); } } inline ~TraceCollectorStats() { if (UsePerfData) _c->last_exit_counter()->set_value(os::elapsed_counter()); } };