annotate src/share/vm/runtime/statSampler.hpp @ 61:5a76ab815e34

6667833: Remove CacheTimeMillis Summary: Remove -XX:+CacheTimeMillis option and associated functionality Reviewed-by: acorn, never
author sbohne
date Wed, 19 Mar 2008 09:58:01 -0400
parents
children c18cbe5936b8
rev   line source
duke@0 1 /*
duke@0 2 * Copyright 2001-2002 Sun Microsystems, Inc. All Rights Reserved.
duke@0 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@0 4 *
duke@0 5 * This code is free software; you can redistribute it and/or modify it
duke@0 6 * under the terms of the GNU General Public License version 2 only, as
duke@0 7 * published by the Free Software Foundation.
duke@0 8 *
duke@0 9 * This code is distributed in the hope that it will be useful, but WITHOUT
duke@0 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@0 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@0 12 * version 2 for more details (a copy is included in the LICENSE file that
duke@0 13 * accompanied this code).
duke@0 14 *
duke@0 15 * You should have received a copy of the GNU General Public License version
duke@0 16 * 2 along with this work; if not, write to the Free Software Foundation,
duke@0 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@0 18 *
duke@0 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@0 20 * CA 95054 USA or visit www.sun.com if you need additional information or
duke@0 21 * have any questions.
duke@0 22 *
duke@0 23 */
duke@0 24
duke@0 25 class StatSamplerTask;
duke@0 26
duke@0 27 /*
duke@0 28 * The StatSampler class is responsible for periodically updating
duke@0 29 * sampled PerfData instances and writing the sampled values to the
duke@0 30 * PerfData memory region.
duke@0 31 *
duke@0 32 * In addition it is also responsible for providing a home for
duke@0 33 * PerfData instances that otherwise have no better home.
duke@0 34 */
duke@0 35 class StatSampler : AllStatic {
duke@0 36
duke@0 37 friend class StatSamplerTask;
duke@0 38
duke@0 39 private:
duke@0 40
duke@0 41 static StatSamplerTask* _task;
duke@0 42 static PerfDataList* _sampled;
duke@0 43
duke@0 44 static void collect_sample();
duke@0 45 static void create_misc_perfdata();
duke@0 46 static void create_sampled_perfdata();
duke@0 47 static void sample_data(PerfDataList* list);
duke@0 48 static const char* get_system_property(const char* name, TRAPS);
duke@0 49 static void create_system_property_instrumentation(TRAPS);
duke@0 50
duke@0 51 public:
duke@0 52 // Start/stop the sampler
duke@0 53 static void engage();
duke@0 54 static void disengage();
duke@0 55
duke@0 56 static bool is_active() { return _task != NULL; }
duke@0 57
duke@0 58 static void initialize();
duke@0 59 static void destroy();
duke@0 60 };
duke@0 61
duke@0 62 void statSampler_exit();