1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/gc_implementation/shared/gcTimer.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,193 @@
1.4 +/*
1.5 + * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_GCTIMER_HPP
1.29 +#define SHARE_VM_GC_IMPLEMENTATION_SHARED_GCTIMER_HPP
1.30 +
1.31 +#include "memory/allocation.hpp"
1.32 +#include "prims/jni_md.h"
1.33 +#include "utilities/macros.hpp"
1.34 +#include "utilities/ticks.hpp"
1.35 +
1.36 +class ConcurrentPhase;
1.37 +class GCPhase;
1.38 +class PausePhase;
1.39 +
1.40 +template <class E> class GrowableArray;
1.41 +
1.42 +class PhaseVisitor {
1.43 + public:
1.44 + virtual void visit(GCPhase* phase) = 0;
1.45 + virtual void visit(PausePhase* phase) { visit((GCPhase*)phase); }
1.46 + virtual void visit(ConcurrentPhase* phase) { visit((GCPhase*)phase); }
1.47 +};
1.48 +
1.49 +class GCPhase {
1.50 + const char* _name;
1.51 + int _level;
1.52 + Ticks _start;
1.53 + Ticks _end;
1.54 +
1.55 + public:
1.56 + void set_name(const char* name) { _name = name; }
1.57 + const char* name() const { return _name; }
1.58 +
1.59 + int level() const { return _level; }
1.60 + void set_level(int level) { _level = level; }
1.61 +
1.62 + const Ticks start() const { return _start; }
1.63 + void set_start(const Ticks& time) { _start = time; }
1.64 +
1.65 + const Ticks end() const { return _end; }
1.66 + void set_end(const Ticks& time) { _end = time; }
1.67 +
1.68 + virtual void accept(PhaseVisitor* visitor) = 0;
1.69 +};
1.70 +
1.71 +class PausePhase : public GCPhase {
1.72 + public:
1.73 + void accept(PhaseVisitor* visitor) {
1.74 + visitor->visit(this);
1.75 + }
1.76 +};
1.77 +
1.78 +class ConcurrentPhase : public GCPhase {
1.79 + void accept(PhaseVisitor* visitor) {
1.80 + visitor->visit(this);
1.81 + }
1.82 +};
1.83 +
1.84 +class PhasesStack {
1.85 + public:
1.86 + // FIXME: Temporary set to 5 (used to be 4), since Reference processing needs it.
1.87 + static const int PHASE_LEVELS = 5;
1.88 +
1.89 + private:
1.90 + int _phase_indices[PHASE_LEVELS];
1.91 + int _next_phase_level;
1.92 +
1.93 + public:
1.94 + PhasesStack() { clear(); }
1.95 + void clear();
1.96 +
1.97 + void push(int phase_index);
1.98 + int pop();
1.99 + int count() const;
1.100 +};
1.101 +
1.102 +class TimePartitions {
1.103 + static const int INITIAL_CAPACITY = 10;
1.104 +
1.105 + // Currently we only support pause phases.
1.106 + GrowableArray<PausePhase>* _phases;
1.107 + PhasesStack _active_phases;
1.108 +
1.109 + Tickspan _sum_of_pauses;
1.110 + Tickspan _longest_pause;
1.111 +
1.112 + public:
1.113 + TimePartitions();
1.114 + ~TimePartitions();
1.115 + void clear();
1.116 +
1.117 + void report_gc_phase_start(const char* name, const Ticks& time);
1.118 + void report_gc_phase_end(const Ticks& time);
1.119 +
1.120 + int num_phases() const;
1.121 + GCPhase* phase_at(int index) const;
1.122 +
1.123 + const Tickspan sum_of_pauses() const { return _sum_of_pauses; }
1.124 + const Tickspan longest_pause() const { return _longest_pause; }
1.125 +
1.126 + bool has_active_phases();
1.127 + private:
1.128 + void update_statistics(GCPhase* phase);
1.129 +};
1.130 +
1.131 +class PhasesIterator {
1.132 + public:
1.133 + virtual bool has_next() = 0;
1.134 + virtual GCPhase* next() = 0;
1.135 +};
1.136 +
1.137 +class GCTimer : public ResourceObj {
1.138 + NOT_PRODUCT(friend class GCTimerTest;)
1.139 + protected:
1.140 + Ticks _gc_start;
1.141 + Ticks _gc_end;
1.142 + TimePartitions _time_partitions;
1.143 +
1.144 + public:
1.145 + virtual void register_gc_start(const Ticks& time = Ticks::now());
1.146 + virtual void register_gc_end(const Ticks& time = Ticks::now());
1.147 +
1.148 + void register_gc_phase_start(const char* name, const Ticks& time);
1.149 + void register_gc_phase_end(const Ticks& time);
1.150 +
1.151 + const Ticks gc_start() const { return _gc_start; }
1.152 + const Ticks gc_end() const { return _gc_end; }
1.153 +
1.154 + TimePartitions* time_partitions() { return &_time_partitions; }
1.155 +
1.156 + protected:
1.157 + void register_gc_pause_start(const char* name, const Ticks& time = Ticks::now());
1.158 + void register_gc_pause_end(const Ticks& time = Ticks::now());
1.159 +};
1.160 +
1.161 +class STWGCTimer : public GCTimer {
1.162 + public:
1.163 + virtual void register_gc_start(const Ticks& time = Ticks::now());
1.164 + virtual void register_gc_end(const Ticks& time = Ticks::now());
1.165 +};
1.166 +
1.167 +class ConcurrentGCTimer : public GCTimer {
1.168 + public:
1.169 + void register_gc_pause_start(const char* name);
1.170 + void register_gc_pause_end();
1.171 +};
1.172 +
1.173 +class TimePartitionPhasesIterator {
1.174 + TimePartitions* _time_partitions;
1.175 + int _next;
1.176 +
1.177 + public:
1.178 + TimePartitionPhasesIterator(TimePartitions* time_partitions) : _time_partitions(time_partitions), _next(0) { }
1.179 +
1.180 + virtual bool has_next();
1.181 + virtual GCPhase* next();
1.182 +};
1.183 +
1.184 +
1.185 +/////////////// Unit tests ///////////////
1.186 +
1.187 +#ifndef PRODUCT
1.188 +
1.189 +class GCTimerAllTest {
1.190 + public:
1.191 + static void all();
1.192 +};
1.193 +
1.194 +#endif
1.195 +
1.196 +#endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_GCTIMER_HPP
