| // Copyright 2012 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "src/logging/counters.h" |
| |
| #include "src/base/atomic-utils.h" |
| #include "src/base/platform/elapsed-timer.h" |
| #include "src/base/platform/time.h" |
| #include "src/builtins/builtins-definitions.h" |
| #include "src/execution/isolate.h" |
| #include "src/execution/thread-id.h" |
| #include "src/logging/log-inl.h" |
| #include "src/logging/log.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| StatsTable::StatsTable(Counters* counters) |
| : lookup_function_(nullptr), |
| create_histogram_function_(nullptr), |
| add_histogram_sample_function_(nullptr) {} |
| |
| void StatsTable::SetCounterFunction(CounterLookupCallback f) { |
| lookup_function_ = f; |
| } |
| |
| namespace { |
| std::atomic<int> unused_counter_dump{0}; |
| } |
| |
| bool StatsCounter::Enabled() { return GetPtr() != &unused_counter_dump; } |
| |
| std::atomic<int>* StatsCounter::SetupPtrFromStatsTable() { |
| // {Init} must have been called. |
| DCHECK_NOT_NULL(counters_); |
| DCHECK_NOT_NULL(name_); |
| int* location = counters_->FindLocation(name_); |
| std::atomic<int>* ptr = |
| location ? base::AsAtomicPtr(location) : &unused_counter_dump; |
| #ifdef DEBUG |
| std::atomic<int>* old_ptr = ptr_.exchange(ptr, std::memory_order_release); |
| DCHECK_IMPLIES(old_ptr, old_ptr == ptr); |
| #else |
| ptr_.store(ptr, std::memory_order_release); |
| #endif |
| return ptr; |
| } |
| |
| void Histogram::AddSample(int sample) { |
| if (Enabled()) { |
| counters_->AddHistogramSample(histogram_, sample); |
| } |
| } |
| |
| void* Histogram::CreateHistogram() const { |
| return counters_->CreateHistogram(name_, min_, max_, num_buckets_); |
| } |
| |
| void TimedHistogram::Stop(base::ElapsedTimer* timer) { |
| DCHECK(Enabled()); |
| AddTimedSample(timer->Elapsed()); |
| timer->Stop(); |
| } |
| |
| void TimedHistogram::AddTimedSample(base::TimeDelta sample) { |
| if (Enabled()) { |
| int64_t sample_int = resolution_ == TimedHistogramResolution::MICROSECOND |
| ? sample.InMicroseconds() |
| : sample.InMilliseconds(); |
| AddSample(static_cast<int>(sample_int)); |
| } |
| } |
| |
| void TimedHistogram::RecordAbandon(base::ElapsedTimer* timer, |
| Isolate* isolate) { |
| if (Enabled()) { |
| DCHECK(timer->IsStarted()); |
| timer->Stop(); |
| int64_t sample = resolution_ == TimedHistogramResolution::MICROSECOND |
| ? base::TimeDelta::Max().InMicroseconds() |
| : base::TimeDelta::Max().InMilliseconds(); |
| AddSample(static_cast<int>(sample)); |
| } |
| if (isolate != nullptr) { |
| V8FileLogger::CallEventLogger(isolate, name(), v8::LogEventStatus::kEnd, |
| true); |
| } |
| } |
| |
| #ifdef DEBUG |
| bool TimedHistogram::ToggleRunningState(bool expect_to_run) const { |
| #if __clang__ |
| #pragma clang diagnostic push |
| #pragma clang diagnostic ignored "-Wexit-time-destructors" |
| #endif |
| static thread_local std::unordered_map<const TimedHistogram*, bool> |
| active_timer; |
| #if __clang__ |
| #pragma clang diagnostic pop |
| #endif |
| bool is_running = active_timer[this]; |
| DCHECK_NE(is_running, expect_to_run); |
| active_timer[this] = !is_running; |
| return true; |
| } |
| #endif |
| |
| namespace { |
| static constexpr int DefaultTimedHistogramNumBuckets = 50; |
| } |
| |
| void CountersInitializer::Visit(Histogram* histogram, const char* caption, |
| int min, int max, int num_buckets) { |
| histogram->Initialize(caption, min, max, num_buckets, counters()); |
| } |
| |
| void CountersInitializer::Visit(PercentageHistogram* histogram, |
| const char* caption) { |
| histogram->Initialize(caption, 0, 101, 100, counters()); |
| } |
| |
| void CountersInitializer::Visit(LegacyMemoryHistogram* histogram, |
| const char* caption) { |
| // Exponential histogram assigns bucket limits to points |
| // p[1], p[2], ... p[n] such that p[i+1] / p[i] = constant. |
| // The constant factor is equal to the n-th root of (high / low), |
| // where the n is the number of buckets, the low is the lower limit, |
| // the high is the upper limit. |
| // For n = 50, low = 1000, high = 500000: the factor = 1.13. |
| histogram->Initialize(caption, 1000, 500000, 50, counters()); |
| } |
| |
| void CountersInitializer::Visit(TimedHistogram* histogram, const char* caption, |
| int max, TimedHistogramResolution res) { |
| histogram->Initialize(caption, 0, max, res, DefaultTimedHistogramNumBuckets, |
| counters()); |
| } |
| |
| void CountersInitializer::Visit(NestedTimedHistogram* histogram, |
| const char* caption, int max, |
| TimedHistogramResolution res) { |
| histogram->Initialize(caption, 0, max, res, DefaultTimedHistogramNumBuckets, |
| counters()); |
| } |
| |
| void CountersInitializer::Visit(AggregatableHistogramTimer* histogram, |
| const char* caption) { |
| histogram->Initialize(caption, 0, 10000000, DefaultTimedHistogramNumBuckets, |
| counters()); |
| } |
| |
| void CountersInitializer::Visit(StatsCounter* counter, const char* caption) { |
| counter->Initialize(caption, counters()); |
| } |
| |
| Counters::Counters(Isolate* isolate) |
| : |
| #ifdef V8_RUNTIME_CALL_STATS |
| runtime_call_stats_(RuntimeCallStats::kMainIsolateThread), |
| worker_thread_runtime_call_stats_(), |
| #endif |
| isolate_(isolate), |
| stats_table_(this) { |
| CountersInitializer init(this); |
| init.Start(); |
| } |
| |
| void StatsCounterResetter::VisitStatsCounter(StatsCounter* counter, |
| const char* caption) { |
| counter->Reset(); |
| } |
| |
| void Counters::ResetCounterFunction(CounterLookupCallback f) { |
| stats_table_.SetCounterFunction(f); |
| StatsCounterResetter resetter(this); |
| resetter.Start(); |
| } |
| |
| void HistogramResetter::VisitHistogram(Histogram* histogram, |
| const char* caption) { |
| histogram->Reset(); |
| } |
| |
| void Counters::ResetCreateHistogramFunction(CreateHistogramCallback f) { |
| stats_table_.SetCreateHistogramFunction(f); |
| HistogramResetter resetter(this); |
| resetter.Start(); |
| } |
| |
| void CountersVisitor::Start() { |
| VisitStatsCounters(); |
| VisitHistograms(); |
| } |
| |
| void CountersVisitor::VisitHistograms() { |
| #define HR(name, caption, min, max, num_buckets) \ |
| Visit(&counters()->name##_, #caption, min, max, num_buckets); |
| HISTOGRAM_RANGE_LIST(HR) |
| #undef HR |
| |
| #define HR(name, caption) Visit(&counters()->name##_, #caption); |
| HISTOGRAM_PERCENTAGE_LIST(HR) |
| #undef HR |
| |
| #define HR(name, caption) Visit(&counters()->name##_, #caption); |
| HISTOGRAM_LEGACY_MEMORY_LIST(HR) |
| #undef HR |
| |
| #define HT(name, caption, max, res) \ |
| Visit(&counters()->name##_, #caption, max, TimedHistogramResolution::res); |
| NESTED_TIMED_HISTOGRAM_LIST(HT) |
| #undef HT |
| |
| #define HT(name, caption, max, res) \ |
| Visit(&counters()->name##_, #caption, max, TimedHistogramResolution::res); |
| NESTED_TIMED_HISTOGRAM_LIST_SLOW(HT) |
| #undef HT |
| |
| #define HT(name, caption, max, res) \ |
| Visit(&counters()->name##_, #caption, max, TimedHistogramResolution::res); |
| TIMED_HISTOGRAM_LIST(HT) |
| #undef HT |
| |
| #define AHT(name, caption) Visit(&counters()->name##_, #caption); |
| AGGREGATABLE_HISTOGRAM_TIMER_LIST(AHT) |
| #undef AHT |
| } |
| |
| void CountersVisitor::VisitStatsCounters() { |
| #define SC(name, caption) Visit(&counters()->name##_, "c:" #caption); |
| STATS_COUNTER_LIST(SC) |
| STATS_COUNTER_NATIVE_CODE_LIST(SC) |
| #undef SC |
| } |
| |
| void CountersVisitor::Visit(Histogram* histogram, const char* caption, int min, |
| int max, int num_buckets) { |
| VisitHistogram(histogram, caption); |
| } |
| void CountersVisitor::Visit(TimedHistogram* histogram, const char* caption, |
| int max, TimedHistogramResolution res) { |
| VisitHistogram(histogram, caption); |
| } |
| void CountersVisitor::Visit(NestedTimedHistogram* histogram, |
| const char* caption, int max, |
| TimedHistogramResolution res) { |
| VisitHistogram(histogram, caption); |
| } |
| |
| void CountersVisitor::Visit(AggregatableHistogramTimer* histogram, |
| const char* caption) { |
| VisitHistogram(histogram, caption); |
| } |
| |
| void CountersVisitor::Visit(PercentageHistogram* histogram, |
| const char* caption) { |
| VisitHistogram(histogram, caption); |
| } |
| |
| void CountersVisitor::Visit(LegacyMemoryHistogram* histogram, |
| const char* caption) { |
| VisitHistogram(histogram, caption); |
| } |
| |
| void CountersVisitor::Visit(StatsCounter* counter, const char* caption) { |
| VisitStatsCounter(counter, caption); |
| } |
| |
| } // namespace internal |
| } // namespace v8 |