| /* |
| * Copyright (c) 2012, 2017, 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_VM_GC_SHARED_GCTIMER_HPP |
| #define SHARE_VM_GC_SHARED_GCTIMER_HPP |
| |
| #include "memory/allocation.hpp" |
| #include "prims/jni_md.h" |
| #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; |
| }; |
| |
| class TimePartitions { |
| static const int INITIAL_CAPACITY = 10; |
| |
| GrowableArray<GCPhase>* _phases; |
| PhasesStack _active_phases; |
| |
| Tickspan _sum_of_pauses; |
| Tickspan _longest_pause; |
| |
| public: |
| TimePartitions(); |
| ~TimePartitions(); |
| void clear(); |
| |
| void report_gc_phase_start(const char* name, const Ticks& time, GCPhase::PhaseType type=GCPhase::PausePhaseType); |
| void report_gc_phase_end(const Ticks& time, GCPhase::PhaseType type=GCPhase::PausePhaseType); |
| |
| 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 : public ResourceObj { |
| NOT_PRODUCT(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_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; } |
| |
| protected: |
| void register_gc_pause_start(const char* name, const Ticks& time = Ticks::now()); |
| void register_gc_pause_end(const Ticks& time = Ticks::now()); |
| }; |
| |
| class STWGCTimer : public GCTimer { |
| 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 { |
| // ConcurrentGCTimer can't be used if there is an overlap between a pause phase and a concurrent phase. |
| // _is_concurrent_phase_active is used to find above case. |
| bool _is_concurrent_phase_active; |
| |
| public: |
| ConcurrentGCTimer(): GCTimer(), _is_concurrent_phase_active(false) {}; |
| |
| void register_gc_pause_start(const char* name); |
| void register_gc_pause_end(); |
| |
| 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_VM_GC_SHARED_GCTIMER_HPP |