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/*
* Copyright (c) 2012, 2019, 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_GC_SHARED_GCTIMER_HPP
#define SHARE_GC_SHARED_GCTIMER_HPP
#include "memory/allocation.hpp"
#include "utilities/macros.hpp"
#include "utilities/ticks.hpp"
class ConcurrentPhase;
class GCPhase;
class PausePhase;
template <class E> class GrowableArray;
class PhaseVisitor {
public:
virtual void visit(GCPhase* phase) = 0;
};
class GCPhase {
public:
enum PhaseType {
PausePhaseType = 0,
ConcurrentPhaseType = 1
};
private:
const char* _name;
int _level;
Ticks _start;
Ticks _end;
PhaseType _type;
public:
void set_name(const char* name) { _name = name; }
const char* name() const { return _name; }
int level() const { return _level; }
void set_level(int level) { _level = level; }
const Ticks start() const { return _start; }
void set_start(const Ticks& time) { _start = time; }
const Ticks end() const { return _end; }
void set_end(const Ticks& time) { _end = time; }
PhaseType type() const { return _type; }
void set_type(PhaseType type) { _type = type; }
void accept(PhaseVisitor* visitor) {
visitor->visit(this);
}
};
class PhasesStack {
public:
// Set to 6, since Reference processing needs it.
static const int PHASE_LEVELS = 6;
private:
int _phase_indices[PHASE_LEVELS];
int _next_phase_level;
public:
PhasesStack() { clear(); }
void clear();
void push(int phase_index);
int pop();
int count() const;
int phase_index(int level) const;
};
class TimePartitions {
friend class TimePartitionsTest;
static const int INITIAL_CAPACITY = 10;
GrowableArray<GCPhase>* _phases;
PhasesStack _active_phases;
Tickspan _sum_of_pauses;
Tickspan _longest_pause;
GCPhase::PhaseType current_phase_type() const;
void report_gc_phase_start(const char* name, const Ticks& time, GCPhase::PhaseType type);
public:
TimePartitions();
~TimePartitions();
void clear();
void report_gc_phase_start_top_level(const char* name, const Ticks& time, GCPhase::PhaseType type);
void report_gc_phase_start_sub_phase(const char* name, const Ticks& time);
void report_gc_phase_end(const Ticks& time);
int num_phases() const;
GCPhase* phase_at(int index) const;
const Tickspan sum_of_pauses() const { return _sum_of_pauses; }
const Tickspan longest_pause() const { return _longest_pause; }
bool has_active_phases();
private:
void update_statistics(GCPhase* phase);
};
class PhasesIterator {
public:
virtual bool has_next() = 0;
virtual GCPhase* next() = 0;
};
class GCTimer {
friend class GCTimerTest;
protected:
Ticks _gc_start;
Ticks _gc_end;
TimePartitions _time_partitions;
public:
virtual void register_gc_start(const Ticks& time = Ticks::now());
virtual void register_gc_end(const Ticks& time = Ticks::now());
void register_gc_pause_start(const char* name, const Ticks& time = Ticks::now());
void register_gc_pause_end(const Ticks& time = Ticks::now());
void register_gc_phase_start(const char* name, const Ticks& time);
void register_gc_phase_end(const Ticks& time);
const Ticks gc_start() const { return _gc_start; }
const Ticks gc_end() const { return _gc_end; }
TimePartitions* time_partitions() { return &_time_partitions; }
};
class STWGCTimer : public GCTimer, public CHeapObj<mtGC> {
public:
virtual void register_gc_start(const Ticks& time = Ticks::now());
virtual void register_gc_end(const Ticks& time = Ticks::now());
};
class ConcurrentGCTimer : public GCTimer, public CHeapObj<mtGC> {
public:
void register_gc_concurrent_start(const char* name, const Ticks& time = Ticks::now());
void register_gc_concurrent_end(const Ticks& time = Ticks::now());
};
class TimePartitionPhasesIterator {
TimePartitions* _time_partitions;
int _next;
public:
TimePartitionPhasesIterator(TimePartitions* time_partitions) : _time_partitions(time_partitions), _next(0) { }
virtual bool has_next();
virtual GCPhase* next();
};
#endif // SHARE_GC_SHARED_GCTIMER_HPP
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