185 lines
5.5 KiB
C++
185 lines
5.5 KiB
C++
/*
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* Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "gc/shared/gcTimer.hpp"
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#include "utilities/growableArray.hpp"
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// the "time" parameter for most functions
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// has a default value set by Ticks::now()
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void GCTimer::register_gc_start(const Ticks& time) {
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_time_partitions.clear();
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_gc_start = time;
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}
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void GCTimer::register_gc_end(const Ticks& time) {
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assert(!_time_partitions.has_active_phases(),
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"We should have ended all started phases, before ending the GC");
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_gc_end = time;
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}
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void GCTimer::register_gc_pause_start(const char* name, const Ticks& time) {
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_time_partitions.report_gc_phase_start(name, time);
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}
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void GCTimer::register_gc_pause_end(const Ticks& time) {
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_time_partitions.report_gc_phase_end(time);
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}
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void GCTimer::register_gc_phase_start(const char* name, const Ticks& time) {
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_time_partitions.report_gc_phase_start(name, time);
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}
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void GCTimer::register_gc_phase_end(const Ticks& time) {
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_time_partitions.report_gc_phase_end(time);
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}
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void STWGCTimer::register_gc_start(const Ticks& time) {
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GCTimer::register_gc_start(time);
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register_gc_pause_start("GC Pause", time);
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}
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void STWGCTimer::register_gc_end(const Ticks& time) {
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register_gc_pause_end(time);
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GCTimer::register_gc_end(time);
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}
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void ConcurrentGCTimer::register_gc_pause_start(const char* name, const Ticks& time) {
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assert(!_is_concurrent_phase_active, "A pause phase can't be started while a concurrent phase is active.");
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GCTimer::register_gc_pause_start(name, time);
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}
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void ConcurrentGCTimer::register_gc_pause_end(const Ticks& time) {
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assert(!_is_concurrent_phase_active, "A pause phase can't be ended while a concurrent phase is active.");
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GCTimer::register_gc_pause_end(time);
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}
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void ConcurrentGCTimer::register_gc_concurrent_start(const char* name, const Ticks& time) {
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assert(!_is_concurrent_phase_active, "A concurrent phase is already active.");
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_time_partitions.report_gc_phase_start(name, time, GCPhase::ConcurrentPhaseType);
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_is_concurrent_phase_active = true;
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}
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void ConcurrentGCTimer::register_gc_concurrent_end(const Ticks& time) {
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assert(_is_concurrent_phase_active, "A concurrent phase is not active.");
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_time_partitions.report_gc_phase_end(time, GCPhase::ConcurrentPhaseType);
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_is_concurrent_phase_active = false;
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}
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void PhasesStack::clear() {
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_next_phase_level = 0;
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}
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void PhasesStack::push(int phase_index) {
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assert(_next_phase_level < PHASE_LEVELS, "Overflow");
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_phase_indices[_next_phase_level] = phase_index;
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_next_phase_level++;
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}
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int PhasesStack::pop() {
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assert(_next_phase_level > 0, "Underflow");
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_next_phase_level--;
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return _phase_indices[_next_phase_level];
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}
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int PhasesStack::count() const {
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return _next_phase_level;
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}
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TimePartitions::TimePartitions() {
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_phases = new (ResourceObj::C_HEAP, mtGC) GrowableArray<GCPhase>(INITIAL_CAPACITY, true, mtGC);
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clear();
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}
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TimePartitions::~TimePartitions() {
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delete _phases;
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_phases = NULL;
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}
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void TimePartitions::clear() {
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_phases->clear();
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_active_phases.clear();
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_sum_of_pauses = Tickspan();
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_longest_pause = Tickspan();
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}
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void TimePartitions::report_gc_phase_start(const char* name, const Ticks& time, GCPhase::PhaseType type) {
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assert(_phases->length() <= 1000, "Too many recored phases?");
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int level = _active_phases.count();
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GCPhase phase;
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phase.set_type(type);
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phase.set_level(level);
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phase.set_name(name);
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phase.set_start(time);
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int index = _phases->append(phase);
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_active_phases.push(index);
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}
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void TimePartitions::update_statistics(GCPhase* phase) {
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if ((phase->type() == GCPhase::PausePhaseType) && (phase->level() == 0)) {
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const Tickspan pause = phase->end() - phase->start();
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_sum_of_pauses += pause;
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_longest_pause = MAX2(pause, _longest_pause);
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}
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}
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void TimePartitions::report_gc_phase_end(const Ticks& time, GCPhase::PhaseType type) {
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int phase_index = _active_phases.pop();
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GCPhase* phase = _phases->adr_at(phase_index);
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phase->set_end(time);
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update_statistics(phase);
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}
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int TimePartitions::num_phases() const {
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return _phases->length();
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}
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GCPhase* TimePartitions::phase_at(int index) const {
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assert(index >= 0, "Out of bounds");
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assert(index < _phases->length(), "Out of bounds");
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return _phases->adr_at(index);
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}
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bool TimePartitions::has_active_phases() {
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return _active_phases.count() > 0;
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}
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bool TimePartitionPhasesIterator::has_next() {
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return _next < _time_partitions->num_phases();
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}
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GCPhase* TimePartitionPhasesIterator::next() {
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assert(has_next(), "Must have phases left");
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return _time_partitions->phase_at(_next++);
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}
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