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// 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.
#ifndef V8_COUNTERS_H_
#define V8_COUNTERS_H_
#include "include/v8.h"
#include "src/allocation.h"
#include "src/base/atomic-utils.h"
#include "src/base/optional.h"
#include "src/base/platform/elapsed-timer.h"
#include "src/base/platform/time.h"
#include "src/globals.h"
#include "src/heap-symbols.h"
#include "src/isolate.h"
#include "src/objects.h"
#include "src/runtime/runtime.h"
#include "src/tracing/trace-event.h"
#include "src/tracing/traced-value.h"
#include "src/tracing/tracing-category-observer.h"
namespace v8 {
namespace internal {
// This struct contains a set of flags that can be modified from multiple
// threads at runtime unlike the normal FLAG_-like flags which are not modified
// after V8 instance is initialized.
struct TracingFlags {
static V8_EXPORT_PRIVATE std::atomic_uint runtime_stats;
static V8_EXPORT_PRIVATE std::atomic_uint gc_stats;
static V8_EXPORT_PRIVATE std::atomic_uint ic_stats;
static bool is_runtime_stats_enabled() {
return runtime_stats.load(std::memory_order_relaxed) != 0;
}
static bool is_gc_stats_enabled() {
return gc_stats.load(std::memory_order_relaxed) != 0;
}
static bool is_ic_stats_enabled() {
return ic_stats.load(std::memory_order_relaxed) != 0;
}
};
// StatsCounters is an interface for plugging into external
// counters for monitoring. Counters can be looked up and
// manipulated by name.
class Counters;
class StatsTable {
public:
// Register an application-defined function for recording
// subsequent counter statistics.
void SetCounterFunction(CounterLookupCallback f);
// Register an application-defined function to create histograms for
// recording subsequent histogram samples.
void SetCreateHistogramFunction(CreateHistogramCallback f) {
create_histogram_function_ = f;
}
// Register an application-defined function to add a sample
// to a histogram created with CreateHistogram function.
void SetAddHistogramSampleFunction(AddHistogramSampleCallback f) {
add_histogram_sample_function_ = f;
}
bool HasCounterFunction() const { return lookup_function_ != nullptr; }
// Lookup the location of a counter by name. If the lookup
// is successful, returns a non-nullptr pointer for writing the
// value of the counter. Each thread calling this function
// may receive a different location to store it's counter.
// The return value must not be cached and re-used across
// threads, although a single thread is free to cache it.
int* FindLocation(const char* name) {
if (!lookup_function_) return nullptr;
return lookup_function_(name);
}
// Create a histogram by name. If the create is successful,
// returns a non-nullptr pointer for use with AddHistogramSample
// function. min and max define the expected minimum and maximum
// sample values. buckets is the maximum number of buckets
// that the samples will be grouped into.
void* CreateHistogram(const char* name,
int min,
int max,
size_t buckets) {
if (!create_histogram_function_) return nullptr;
return create_histogram_function_(name, min, max, buckets);
}
// Add a sample to a histogram created with the CreateHistogram
// function.
void AddHistogramSample(void* histogram, int sample) {
if (!add_histogram_sample_function_) return;
return add_histogram_sample_function_(histogram, sample);
}
private:
friend class Counters;
explicit StatsTable(Counters* counters);
CounterLookupCallback lookup_function_;
CreateHistogramCallback create_histogram_function_;
AddHistogramSampleCallback add_histogram_sample_function_;
DISALLOW_COPY_AND_ASSIGN(StatsTable);
};
// Base class for stats counters.
class StatsCounterBase {
protected:
Counters* counters_;
const char* name_;
int* ptr_;
StatsCounterBase() = default;
StatsCounterBase(Counters* counters, const char* name)
: counters_(counters), name_(name), ptr_(nullptr) {}
void SetLoc(int* loc, int value) { *loc = value; }
void IncrementLoc(int* loc) { (*loc)++; }
void IncrementLoc(int* loc, int value) { (*loc) += value; }
void DecrementLoc(int* loc) { (*loc)--; }
void DecrementLoc(int* loc, int value) { (*loc) -= value; }
int* FindLocationInStatsTable() const;
};
// StatsCounters are dynamically created values which can be tracked in
// the StatsTable. They are designed to be lightweight to create and
// easy to use.
//
// Internally, a counter represents a value in a row of a StatsTable.
// The row has a 32bit value for each process/thread in the table and also
// a name (stored in the table metadata). Since the storage location can be
// thread-specific, this class cannot be shared across threads. Note: This
// class is not thread safe.
class StatsCounter : public StatsCounterBase {
public:
// Sets the counter to a specific value.
void Set(int value) {
if (int* loc = GetPtr()) SetLoc(loc, value);
}
// Increments the counter.
void Increment() {
if (int* loc = GetPtr()) IncrementLoc(loc);
}
void Increment(int value) {
if (int* loc = GetPtr()) IncrementLoc(loc, value);
}
// Decrements the counter.
void Decrement() {
if (int* loc = GetPtr()) DecrementLoc(loc);
}
void Decrement(int value) {
if (int* loc = GetPtr()) DecrementLoc(loc, value);
}
// Is this counter enabled?
// Returns false if table is full.
bool Enabled() { return GetPtr() != nullptr; }
// Get the internal pointer to the counter. This is used
// by the code generator to emit code that manipulates a
// given counter without calling the runtime system.
int* GetInternalPointer() {
int* loc = GetPtr();
DCHECK_NOT_NULL(loc);
return loc;
}
private:
friend class Counters;
StatsCounter() = default;
StatsCounter(Counters* counters, const char* name)
: StatsCounterBase(counters, name), lookup_done_(false) {}
// Reset the cached internal pointer.
void Reset() { lookup_done_ = false; }
// Returns the cached address of this counter location.
int* GetPtr() {
if (lookup_done_) return ptr_;
lookup_done_ = true;
ptr_ = FindLocationInStatsTable();
return ptr_;
}
bool lookup_done_;
};
// Thread safe version of StatsCounter.
class StatsCounterThreadSafe : public StatsCounterBase {
public:
void Set(int Value);
void Increment();
void Increment(int value);
void Decrement();
void Decrement(int value);
bool Enabled() { return ptr_ != nullptr; }
int* GetInternalPointer() {
DCHECK_NOT_NULL(ptr_);
return ptr_;
}
private:
friend class Counters;
StatsCounterThreadSafe(Counters* counters, const char* name);
void Reset() { ptr_ = FindLocationInStatsTable(); }
base::Mutex mutex_;
DISALLOW_IMPLICIT_CONSTRUCTORS(StatsCounterThreadSafe);
};
// A Histogram represents a dynamically created histogram in the
// StatsTable. Note: This class is thread safe.
class Histogram {
public:
// Add a single sample to this histogram.
void AddSample(int sample);
// Returns true if this histogram is enabled.
bool Enabled() { return histogram_ != nullptr; }
const char* name() { return name_; }
int min() const { return min_; }
int max() const { return max_; }
int num_buckets() const { return num_buckets_; }
// Asserts that |expected_counters| are the same as the Counters this
// Histogram reports to.
void AssertReportsToCounters(Counters* expected_counters) {
DCHECK_EQ(counters_, expected_counters);
}
protected:
Histogram() = default;
Histogram(const char* name, int min, int max, int num_buckets,
Counters* counters)
: name_(name),
min_(min),
max_(max),
num_buckets_(num_buckets),
histogram_(nullptr),
counters_(counters) {
DCHECK(counters_);
}
Counters* counters() const { return counters_; }
// Reset the cached internal pointer.
void Reset() { histogram_ = CreateHistogram(); }
private:
friend class Counters;
void* CreateHistogram() const;
const char* name_;
int min_;
int max_;
int num_buckets_;
void* histogram_;
Counters* counters_;
};
enum class HistogramTimerResolution { MILLISECOND, MICROSECOND };
// A thread safe histogram timer. It also allows distributions of
// nested timed results.
class TimedHistogram : public Histogram {
public:
// Start the timer. Log if isolate non-null.
void Start(base::ElapsedTimer* timer, Isolate* isolate);
// Stop the timer and record the results. Log if isolate non-null.
void Stop(base::ElapsedTimer* timer, Isolate* isolate);
// Records a TimeDelta::Max() result. Useful to record percentage of tasks
// that never got to run in a given scenario. Log if isolate non-null.
void RecordAbandon(base::ElapsedTimer* timer, Isolate* isolate);
protected:
friend class Counters;
HistogramTimerResolution resolution_;
TimedHistogram() = default;
TimedHistogram(const char* name, int min, int max,
HistogramTimerResolution resolution, int num_buckets,
Counters* counters)
: Histogram(name, min, max, num_buckets, counters),
resolution_(resolution) {}
void AddTimeSample();
};
// Helper class for scoping a TimedHistogram.
class TimedHistogramScope {
public:
explicit TimedHistogramScope(TimedHistogram* histogram,
Isolate* isolate = nullptr)
: histogram_(histogram), isolate_(isolate) {
histogram_->Start(&timer_, isolate);
}
~TimedHistogramScope() { histogram_->Stop(&timer_, isolate_); }
private:
base::ElapsedTimer timer_;
TimedHistogram* histogram_;
Isolate* isolate_;
DISALLOW_IMPLICIT_CONSTRUCTORS(TimedHistogramScope);
};
enum class OptionalTimedHistogramScopeMode { TAKE_TIME, DONT_TAKE_TIME };
// Helper class for scoping a TimedHistogram.
// It will not take time for mode = DONT_TAKE_TIME.
class OptionalTimedHistogramScope {
public:
OptionalTimedHistogramScope(TimedHistogram* histogram, Isolate* isolate,
OptionalTimedHistogramScopeMode mode)
: histogram_(histogram), isolate_(isolate), mode_(mode) {
if (mode == OptionalTimedHistogramScopeMode::TAKE_TIME) {
histogram_->Start(&timer_, isolate);
}
}
~OptionalTimedHistogramScope() {
if (mode_ == OptionalTimedHistogramScopeMode::TAKE_TIME) {
histogram_->Stop(&timer_, isolate_);
}
}
private:
base::ElapsedTimer timer_;
TimedHistogram* const histogram_;
Isolate* const isolate_;
const OptionalTimedHistogramScopeMode mode_;
DISALLOW_IMPLICIT_CONSTRUCTORS(OptionalTimedHistogramScope);
};
// Helper class for recording a TimedHistogram asynchronously with manual
// controls (it will not generate a report if destroyed without explicitly
// triggering a report). |async_counters| should be a shared_ptr to
// |histogram->counters()|, making it is safe to report to an
// AsyncTimedHistogram after the associated isolate has been destroyed.
// AsyncTimedHistogram can be moved/copied to avoid computing Now() multiple
// times when the times of multiple tasks are identical; each copy will generate
// its own report.
class AsyncTimedHistogram {
public:
explicit AsyncTimedHistogram(TimedHistogram* histogram,
std::shared_ptr<Counters> async_counters)
: histogram_(histogram), async_counters_(std::move(async_counters)) {
histogram_->AssertReportsToCounters(async_counters_.get());
histogram_->Start(&timer_, nullptr);
}
// Records the time elapsed to |histogram_| and stops |timer_|.
void RecordDone() { histogram_->Stop(&timer_, nullptr); }
// Records TimeDelta::Max() to |histogram_| and stops |timer_|.
void RecordAbandon() { histogram_->RecordAbandon(&timer_, nullptr); }
private:
base::ElapsedTimer timer_;
TimedHistogram* histogram_;
std::shared_ptr<Counters> async_counters_;
};
// Helper class for scoping a TimedHistogram, where the histogram is selected at
// stop time rather than start time.
// TODO(leszeks): This is heavily reliant on TimedHistogram::Start() doing
// nothing but starting the timer, and TimedHistogram::Stop() logging the sample
// correctly even if Start() was not called. This happens to be true iff Stop()
// is passed a null isolate, but that's an implementation detail of
// TimedHistogram, and we shouldn't rely on it.
class LazyTimedHistogramScope {
public:
LazyTimedHistogramScope() : histogram_(nullptr) { timer_.Start(); }
~LazyTimedHistogramScope() {
// We should set the histogram before this scope exits.
DCHECK_NOT_NULL(histogram_);
histogram_->Stop(&timer_, nullptr);
}
void set_histogram(TimedHistogram* histogram) { histogram_ = histogram; }
private:
base::ElapsedTimer timer_;
TimedHistogram* histogram_;
};
// A HistogramTimer allows distributions of non-nested timed results
// to be created. WARNING: This class is not thread safe and can only
// be run on the foreground thread.
class HistogramTimer : public TimedHistogram {
public:
// Note: public for testing purposes only.
HistogramTimer(const char* name, int min, int max,
HistogramTimerResolution resolution, int num_buckets,
Counters* counters)
: TimedHistogram(name, min, max, resolution, num_buckets, counters) {}
inline void Start();
inline void Stop();
// Returns true if the timer is running.
bool Running() {
return Enabled() && timer_.IsStarted();
}
// TODO(bmeurer): Remove this when HistogramTimerScope is fixed.
#ifdef DEBUG
base::ElapsedTimer* timer() { return &timer_; }
#endif
private:
friend class Counters;
base::ElapsedTimer timer_;
HistogramTimer() = default;
};
// Helper class for scoping a HistogramTimer.
// TODO(bmeurer): The ifdeffery is an ugly hack around the fact that the
// Parser is currently reentrant (when it throws an error, we call back
// into JavaScript and all bets are off), but ElapsedTimer is not
// reentry-safe. Fix this properly and remove |allow_nesting|.
class HistogramTimerScope {
public:
explicit HistogramTimerScope(HistogramTimer* timer,
bool allow_nesting = false)
#ifdef DEBUG
: timer_(timer), skipped_timer_start_(false) {
if (timer_->timer()->IsStarted() && allow_nesting) {
skipped_timer_start_ = true;
} else {
timer_->Start();
}
}
#else
: timer_(timer) {
timer_->Start();
}
#endif
~HistogramTimerScope() {
#ifdef DEBUG
if (!skipped_timer_start_) {
timer_->Stop();
}
#else
timer_->Stop();
#endif
}
private:
HistogramTimer* timer_;
#ifdef DEBUG
bool skipped_timer_start_;
#endif
};
// A histogram timer that can aggregate events within a larger scope.
//
// Intended use of this timer is to have an outer (aggregating) and an inner
// (to be aggregated) scope, where the inner scope measure the time of events,
// and all those inner scope measurements will be summed up by the outer scope.
// An example use might be to aggregate the time spent in lazy compilation
// while running a script.
//
// Helpers:
// - AggregatingHistogramTimerScope, the "outer" scope within which
// times will be summed up.
// - AggregatedHistogramTimerScope, the "inner" scope which defines the
// events to be timed.
class AggregatableHistogramTimer : public Histogram {
public:
// Start/stop the "outer" scope.
void Start() { time_ = base::TimeDelta(); }
void Stop() {
if (time_ != base::TimeDelta()) {
// Only add non-zero samples, since zero samples represent situations
// where there were no aggregated samples added.
AddSample(static_cast<int>(time_.InMicroseconds()));
}
}
// Add a time value ("inner" scope).
void Add(base::TimeDelta other) { time_ += other; }
private:
friend class Counters;
AggregatableHistogramTimer() = default;
AggregatableHistogramTimer(const char* name, int min, int max,
int num_buckets, Counters* counters)
: Histogram(name, min, max, num_buckets, counters) {}
base::TimeDelta time_;
};
// A helper class for use with AggregatableHistogramTimer. This is the
// // outer-most timer scope used with an AggregatableHistogramTimer. It will
// // aggregate the information from the inner AggregatedHistogramTimerScope.
class AggregatingHistogramTimerScope {
public:
explicit AggregatingHistogramTimerScope(AggregatableHistogramTimer* histogram)
: histogram_(histogram) {
histogram_->Start();
}
~AggregatingHistogramTimerScope() { histogram_->Stop(); }
private:
AggregatableHistogramTimer* histogram_;
};
// A helper class for use with AggregatableHistogramTimer, the "inner" scope
// // which defines the events to be timed.
class AggregatedHistogramTimerScope {
public:
explicit AggregatedHistogramTimerScope(AggregatableHistogramTimer* histogram)
: histogram_(histogram) {
timer_.Start();
}
~AggregatedHistogramTimerScope() { histogram_->Add(timer_.Elapsed()); }
private:
base::ElapsedTimer timer_;
AggregatableHistogramTimer* histogram_;
};
// AggretatedMemoryHistogram collects (time, value) sample pairs and turns
// them into time-uniform samples for the backing historgram, such that the
// backing histogram receives one sample every T ms, where the T is controlled
// by the FLAG_histogram_interval.
//
// More formally: let F be a real-valued function that maps time to sample
// values. We define F as a linear interpolation between adjacent samples. For
// each time interval [x; x + T) the backing histogram gets one sample value
// that is the average of F(t) in the interval.
template <typename Histogram>
class AggregatedMemoryHistogram {
public:
// Note: public for testing purposes only.
explicit AggregatedMemoryHistogram(Histogram* backing_histogram)
: AggregatedMemoryHistogram() {
backing_histogram_ = backing_histogram;
}
// Invariants that hold before and after AddSample if
// is_initialized_ is true:
//
// 1) For we processed samples that came in before start_ms_ and sent the
// corresponding aggregated samples to backing histogram.
// 2) (last_ms_, last_value_) is the last received sample.
// 3) last_ms_ < start_ms_ + FLAG_histogram_interval.
// 4) aggregate_value_ is the average of the function that is constructed by
// linearly interpolating samples received between start_ms_ and last_ms_.
void AddSample(double current_ms, double current_value);
private:
friend class Counters;
AggregatedMemoryHistogram()
: is_initialized_(false),
start_ms_(0.0),
last_ms_(0.0),
aggregate_value_(0.0),
last_value_(0.0),
backing_histogram_(nullptr) {}
double Aggregate(double current_ms, double current_value);
bool is_initialized_;
double start_ms_;
double last_ms_;
double aggregate_value_;
double last_value_;
Histogram* backing_histogram_;
};
template <typename Histogram>
void AggregatedMemoryHistogram<Histogram>::AddSample(double current_ms,
double current_value) {
if (!is_initialized_) {
aggregate_value_ = current_value;
start_ms_ = current_ms;
last_value_ = current_value;
last_ms_ = current_ms;
is_initialized_ = true;
} else {
const double kEpsilon = 1e-6;
const int kMaxSamples = 1000;
if (current_ms < last_ms_ + kEpsilon) {
// Two samples have the same time, remember the last one.
last_value_ = current_value;
} else {
double sample_interval_ms = FLAG_histogram_interval;
double end_ms = start_ms_ + sample_interval_ms;
if (end_ms <= current_ms + kEpsilon) {
// Linearly interpolate between the last_ms_ and the current_ms.
double slope = (current_value - last_value_) / (current_ms - last_ms_);
int i;
// Send aggregated samples to the backing histogram from the start_ms
// to the current_ms.
for (i = 0; i < kMaxSamples && end_ms <= current_ms + kEpsilon; i++) {
double end_value = last_value_ + (end_ms - last_ms_) * slope;
double sample_value;
if (i == 0) {
// Take aggregate_value_ into account.
sample_value = Aggregate(end_ms, end_value);
} else {
// There is no aggregate_value_ for i > 0.
sample_value = (last_value_ + end_value) / 2;
}
backing_histogram_->AddSample(static_cast<int>(sample_value + 0.5));
last_value_ = end_value;
last_ms_ = end_ms;
end_ms += sample_interval_ms;
}
if (i == kMaxSamples) {
// We hit the sample limit, ignore the remaining samples.
aggregate_value_ = current_value;
start_ms_ = current_ms;
} else {
aggregate_value_ = last_value_;
start_ms_ = last_ms_;
}
}
aggregate_value_ = current_ms > start_ms_ + kEpsilon
? Aggregate(current_ms, current_value)
: aggregate_value_;
last_value_ = current_value;
last_ms_ = current_ms;
}
}
}
template <typename Histogram>
double AggregatedMemoryHistogram<Histogram>::Aggregate(double current_ms,
double current_value) {
double interval_ms = current_ms - start_ms_;
double value = (current_value + last_value_) / 2;
// The aggregate_value_ is the average for [start_ms_; last_ms_].
// The value is the average for [last_ms_; current_ms].
// Return the weighted average of the aggregate_value_ and the value.
return aggregate_value_ * ((last_ms_ - start_ms_) / interval_ms) +
value * ((current_ms - last_ms_) / interval_ms);
}
class RuntimeCallCounter final {
public:
RuntimeCallCounter() : RuntimeCallCounter(nullptr) {}
explicit RuntimeCallCounter(const char* name)
: name_(name), count_(0), time_(0) {}
V8_NOINLINE void Reset();
V8_NOINLINE void Dump(v8::tracing::TracedValue* value);
void Add(RuntimeCallCounter* other);
const char* name() const { return name_; }
int64_t count() const { return count_; }
base::TimeDelta time() const {
return base::TimeDelta::FromMicroseconds(time_);
}
void Increment() { count_++; }
void Add(base::TimeDelta delta) { time_ += delta.InMicroseconds(); }
private:
friend class RuntimeCallStats;
const char* name_;
int64_t count_;
// Stored as int64_t so that its initialization can be deferred.
int64_t time_;
};
// RuntimeCallTimer is used to keep track of the stack of currently active
// timers used for properly measuring the own time of a RuntimeCallCounter.
class RuntimeCallTimer final {
public:
RuntimeCallCounter* counter() { return counter_; }
void set_counter(RuntimeCallCounter* counter) { counter_ = counter; }
RuntimeCallTimer* parent() const { return parent_.Value(); }
void set_parent(RuntimeCallTimer* timer) { parent_.SetValue(timer); }
const char* name() const { return counter_->name(); }
inline bool IsStarted();
inline void Start(RuntimeCallCounter* counter, RuntimeCallTimer* parent);
void Snapshot();
inline RuntimeCallTimer* Stop();
// Make the time source configurable for testing purposes.
V8_EXPORT_PRIVATE static base::TimeTicks (*Now)();
private:
inline void Pause(base::TimeTicks now);
inline void Resume(base::TimeTicks now);
inline void CommitTimeToCounter();
RuntimeCallCounter* counter_ = nullptr;
base::AtomicValue<RuntimeCallTimer*> parent_;
base::TimeTicks start_ticks_;
base::TimeDelta elapsed_;
};
#define FOR_EACH_GC_COUNTER(V) \
TRACER_SCOPES(V) \
TRACER_BACKGROUND_SCOPES(V)
#define FOR_EACH_API_COUNTER(V) \
V(ArrayBuffer_Cast) \
V(ArrayBuffer_Detach) \
V(ArrayBuffer_New) \
V(Array_CloneElementAt) \
V(Array_New) \
V(BigInt64Array_New) \
V(BigInt_NewFromWords) \
V(BigIntObject_BigIntValue) \
V(BigIntObject_New) \
V(BigUint64Array_New) \
V(BooleanObject_BooleanValue) \
V(BooleanObject_New) \
V(Context_New) \
V(Context_NewRemoteContext) \
V(DataView_New) \
V(Date_New) \
V(Date_NumberValue) \
V(Debug_Call) \
V(debug_GetPrivateFields) \
V(Error_New) \
V(External_New) \
V(Float32Array_New) \
V(Float64Array_New) \
V(Function_Call) \
V(Function_New) \
V(Function_NewInstance) \
V(FunctionTemplate_GetFunction) \
V(FunctionTemplate_New) \
V(FunctionTemplate_NewRemoteInstance) \
V(FunctionTemplate_NewWithCache) \
V(FunctionTemplate_NewWithFastHandler) \
V(Int16Array_New) \
V(Int32Array_New) \
V(Int8Array_New) \
V(Isolate_DateTimeConfigurationChangeNotification) \
V(Isolate_LocaleConfigurationChangeNotification) \
V(JSON_Parse) \
V(JSON_Stringify) \
V(Map_AsArray) \
V(Map_Clear) \
V(Map_Delete) \
V(Map_Get) \
V(Map_Has) \
V(Map_New) \
V(Map_Set) \
V(Message_GetEndColumn) \
V(Message_GetLineNumber) \
V(Message_GetSourceLine) \
V(Message_GetStartColumn) \
V(Module_Evaluate) \
V(Module_InstantiateModule) \
V(NumberObject_New) \
V(NumberObject_NumberValue) \
V(Object_CallAsConstructor) \
V(Object_CallAsFunction) \
V(Object_CreateDataProperty) \
V(Object_DefineOwnProperty) \
V(Object_DefineProperty) \
V(Object_Delete) \
V(Object_DeleteProperty) \
V(Object_ForceSet) \
V(Object_Get) \
V(Object_GetOwnPropertyDescriptor) \
V(Object_GetOwnPropertyNames) \
V(Object_GetPropertyAttributes) \
V(Object_GetPropertyNames) \
V(Object_GetRealNamedProperty) \
V(Object_GetRealNamedPropertyAttributes) \
V(Object_GetRealNamedPropertyAttributesInPrototypeChain) \
V(Object_GetRealNamedPropertyInPrototypeChain) \
V(Object_Has) \
V(Object_HasOwnProperty) \
V(Object_HasRealIndexedProperty) \
V(Object_HasRealNamedCallbackProperty) \
V(Object_HasRealNamedProperty) \
V(Object_New) \
V(Object_ObjectProtoToString) \
V(Object_Set) \
V(Object_SetAccessor) \
V(Object_SetIntegrityLevel) \
V(Object_SetPrivate) \
V(Object_SetPrototype) \
V(ObjectTemplate_New) \
V(ObjectTemplate_NewInstance) \
V(Object_ToArrayIndex) \
V(Object_ToBigInt) \
V(Object_ToDetailString) \
V(Object_ToInt32) \
V(Object_ToInteger) \
V(Object_ToNumber) \
V(Object_ToObject) \
V(Object_ToString) \
V(Object_ToUint32) \
V(Persistent_New) \
V(Private_New) \
V(Promise_Catch) \
V(Promise_Chain) \
V(Promise_HasRejectHandler) \
V(Promise_Resolver_New) \
V(Promise_Resolver_Reject) \
V(Promise_Resolver_Resolve) \
V(Promise_Result) \
V(Promise_Status) \
V(Promise_Then) \
V(Proxy_New) \
V(RangeError_New) \
V(ReferenceError_New) \
V(RegExp_New) \
V(ScriptCompiler_Compile) \
V(ScriptCompiler_CompileFunctionInContext) \
V(ScriptCompiler_CompileUnbound) \
V(Script_Run) \
V(Set_Add) \
V(Set_AsArray) \
V(Set_Clear) \
V(Set_Delete) \
V(Set_Has) \
V(Set_New) \
V(SharedArrayBuffer_New) \
V(String_Concat) \
V(String_NewExternalOneByte) \
V(String_NewExternalTwoByte) \
V(String_NewFromOneByte) \
V(String_NewFromTwoByte) \
V(String_NewFromUtf8) \
V(StringObject_New) \
V(StringObject_StringValue) \
V(String_Write) \
V(String_WriteUtf8) \
V(Symbol_New) \
V(SymbolObject_New) \
V(SymbolObject_SymbolValue) \
V(SyntaxError_New) \
V(TracedGlobal_New) \
V(TryCatch_StackTrace) \
V(TypeError_New) \
V(Uint16Array_New) \
V(Uint32Array_New) \
V(Uint8Array_New) \
V(Uint8ClampedArray_New) \
V(UnboundScript_GetId) \
V(UnboundScript_GetLineNumber) \
V(UnboundScript_GetName) \
V(UnboundScript_GetSourceMappingURL) \
V(UnboundScript_GetSourceURL) \
V(ValueDeserializer_ReadHeader) \
V(ValueDeserializer_ReadValue) \
V(ValueSerializer_WriteValue) \
V(Value_InstanceOf) \
V(Value_Int32Value) \
V(Value_IntegerValue) \
V(Value_NumberValue) \
V(Value_TypeOf) \
V(Value_Uint32Value) \
V(WeakMap_Get) \
V(WeakMap_New) \
V(WeakMap_Set)
#define FOR_EACH_MANUAL_COUNTER(V) \
V(AccessorGetterCallback) \
V(AccessorSetterCallback) \
V(ArrayLengthGetter) \
V(ArrayLengthSetter) \
V(BoundFunctionLengthGetter) \
V(BoundFunctionNameGetter) \
V(CompileAnalyse) \
V(CompileBackgroundAnalyse) \
V(CompileBackgroundCompileTask) \
V(CompileBackgroundEval) \
V(CompileBackgroundFunction) \
V(CompileBackgroundIgnition) \
V(CompileBackgroundRewriteReturnResult) \
V(CompileBackgroundScopeAnalysis) \
V(CompileBackgroundScript) \
V(CompileCollectSourcePositions) \
V(CompileDeserialize) \
V(CompileEnqueueOnDispatcher) \
V(CompileEval) \
V(CompileFinalizeBackgroundCompileTask) \
V(CompileFinishNowOnDispatcher) \
V(CompileFunction) \
V(CompileGetFromOptimizedCodeMap) \
V(CompileIgnition) \
V(CompileIgnitionFinalization) \
V(CompileRewriteReturnResult) \
V(CompileScopeAnalysis) \
V(CompileScript) \
V(CompileSerialize) \
V(CompileWaitForDispatcher) \
V(DeoptimizeCode) \
V(DeserializeContext) \
V(DeserializeIsolate) \
V(FunctionCallback) \
V(FunctionLengthGetter) \
V(FunctionPrototypeGetter) \
V(FunctionPrototypeSetter) \
V(GC_Custom_AllAvailableGarbage) \
V(GC_Custom_IncrementalMarkingObserver) \
V(GC_Custom_SlowAllocateRaw) \
V(GCEpilogueCallback) \
V(GCPrologueCallback) \
V(Genesis) \
V(GetMoreDataCallback) \
V(IndexedDefinerCallback) \
V(IndexedDeleterCallback) \
V(IndexedDescriptorCallback) \
V(IndexedEnumeratorCallback) \
V(IndexedGetterCallback) \
V(IndexedQueryCallback) \
V(IndexedSetterCallback) \
V(Invoke) \
V(InvokeApiFunction) \
V(InvokeApiInterruptCallbacks) \
V(InvokeFunctionCallback) \
V(JS_Execution) \
V(Map_SetPrototype) \
V(Map_TransitionToAccessorProperty) \
V(Map_TransitionToDataProperty) \
V(MessageListenerCallback) \
V(NamedDefinerCallback) \
V(NamedDeleterCallback) \
V(NamedDescriptorCallback) \
V(NamedEnumeratorCallback) \
V(NamedGetterCallback) \
V(NamedQueryCallback) \
V(NamedSetterCallback) \
V(Object_DeleteProperty) \
V(ObjectVerify) \
V(OptimizeCode) \
V(ParseArrowFunctionLiteral) \
V(ParseBackgroundArrowFunctionLiteral) \
V(ParseBackgroundFunctionLiteral) \
V(ParseBackgroundProgram) \
V(ParseEval) \
V(ParseFunction) \
V(ParseFunctionLiteral) \
V(ParseProgram) \
V(PreParseArrowFunctionLiteral) \
V(PreParseBackgroundArrowFunctionLiteral) \
V(PreParseBackgroundWithVariableResolution) \
V(PreParseWithVariableResolution) \
V(PropertyCallback) \
V(PrototypeMap_TransitionToAccessorProperty) \
V(PrototypeMap_TransitionToDataProperty) \
V(PrototypeObject_DeleteProperty) \
V(RecompileConcurrent) \
V(RecompileSynchronous) \
V(ReconfigureToDataProperty) \
V(StringLengthGetter) \
V(TestCounter1) \
V(TestCounter2) \
V(TestCounter3)
#define FOR_EACH_HANDLER_COUNTER(V) \
V(KeyedLoadIC_KeyedLoadSloppyArgumentsStub) \
V(KeyedLoadIC_LoadElementDH) \
V(KeyedLoadIC_LoadIndexedInterceptorStub) \
V(KeyedLoadIC_LoadIndexedStringDH) \
V(KeyedLoadIC_SlowStub) \
V(KeyedStoreIC_ElementsTransitionAndStoreStub) \
V(KeyedStoreIC_KeyedStoreSloppyArgumentsStub) \
V(KeyedStoreIC_SlowStub) \
V(KeyedStoreIC_StoreElementStub) \
V(KeyedStoreIC_StoreFastElementStub) \
V(LoadGlobalIC_LoadScriptContextField) \
V(LoadGlobalIC_SlowStub) \
V(LoadIC_FunctionPrototypeStub) \
V(LoadIC_HandlerCacheHit_Accessor) \
V(LoadIC_LoadAccessorDH) \
V(LoadIC_LoadAccessorFromPrototypeDH) \
V(LoadIC_LoadApiGetterFromPrototypeDH) \
V(LoadIC_LoadCallback) \
V(LoadIC_LoadConstantDH) \
V(LoadIC_LoadConstantFromPrototypeDH) \
V(LoadIC_LoadFieldDH) \
V(LoadIC_LoadFieldFromPrototypeDH) \
V(LoadIC_LoadGlobalDH) \
V(LoadIC_LoadGlobalFromPrototypeDH) \
V(LoadIC_LoadIntegerIndexedExoticDH) \
V(LoadIC_LoadInterceptorDH) \
V(LoadIC_LoadInterceptorFromPrototypeDH) \
V(LoadIC_LoadNativeDataPropertyDH) \
V(LoadIC_LoadNativeDataPropertyFromPrototypeDH) \
V(LoadIC_LoadNonexistentDH) \
V(LoadIC_LoadNonMaskingInterceptorDH) \
V(LoadIC_LoadNormalDH) \
V(LoadIC_LoadNormalFromPrototypeDH) \
V(LoadIC_NonReceiver) \
V(LoadIC_Premonomorphic) \
V(LoadIC_SlowStub) \
V(LoadIC_StringLength) \
V(LoadIC_StringWrapperLength) \
V(StoreGlobalIC_SlowStub) \
V(StoreGlobalIC_StoreScriptContextField) \
V(StoreGlobalIC_Premonomorphic) \
V(StoreIC_HandlerCacheHit_Accessor) \
V(StoreIC_NonReceiver) \
V(StoreIC_Premonomorphic) \
V(StoreIC_SlowStub) \
V(StoreIC_StoreAccessorDH) \
V(StoreIC_StoreAccessorOnPrototypeDH) \
V(StoreIC_StoreApiSetterOnPrototypeDH) \
V(StoreIC_StoreFieldDH) \
V(StoreIC_StoreGlobalDH) \
V(StoreIC_StoreGlobalTransitionDH) \
V(StoreIC_StoreInterceptorStub) \
V(StoreIC_StoreNativeDataPropertyDH) \
V(StoreIC_StoreNativeDataPropertyOnPrototypeDH) \
V(StoreIC_StoreNormalDH) \
V(StoreIC_StoreTransitionDH) \
V(StoreInArrayLiteralIC_SlowStub)
enum RuntimeCallCounterId {
#define CALL_RUNTIME_COUNTER(name) kGC_##name,
FOR_EACH_GC_COUNTER(CALL_RUNTIME_COUNTER)
#undef CALL_RUNTIME_COUNTER
#define CALL_RUNTIME_COUNTER(name) k##name,
FOR_EACH_MANUAL_COUNTER(CALL_RUNTIME_COUNTER)
#undef CALL_RUNTIME_COUNTER
#define CALL_RUNTIME_COUNTER(name, nargs, ressize) kRuntime_##name,
FOR_EACH_INTRINSIC(CALL_RUNTIME_COUNTER)
#undef CALL_RUNTIME_COUNTER
#define CALL_BUILTIN_COUNTER(name) kBuiltin_##name,
BUILTIN_LIST_C(CALL_BUILTIN_COUNTER)
#undef CALL_BUILTIN_COUNTER
#define CALL_BUILTIN_COUNTER(name) kAPI_##name,
FOR_EACH_API_COUNTER(CALL_BUILTIN_COUNTER)
#undef CALL_BUILTIN_COUNTER
#define CALL_BUILTIN_COUNTER(name) kHandler_##name,
FOR_EACH_HANDLER_COUNTER(CALL_BUILTIN_COUNTER)
#undef CALL_BUILTIN_COUNTER
kNumberOfCounters
};
class RuntimeCallStats final {
public:
V8_EXPORT_PRIVATE RuntimeCallStats();
// Starting measuring the time for a function. This will establish the
// connection to the parent counter for properly calculating the own times.
V8_EXPORT_PRIVATE void Enter(RuntimeCallTimer* timer,
RuntimeCallCounterId counter_id);
// Leave a scope for a measured runtime function. This will properly add
// the time delta to the current_counter and subtract the delta from its
// parent.
V8_EXPORT_PRIVATE void Leave(RuntimeCallTimer* timer);
// Set counter id for the innermost measurement. It can be used to refine
// event kind when a runtime entry counter is too generic.
V8_EXPORT_PRIVATE void CorrectCurrentCounterId(
RuntimeCallCounterId counter_id);
V8_EXPORT_PRIVATE void Reset();
// Add all entries from another stats object.
void Add(RuntimeCallStats* other);
V8_EXPORT_PRIVATE void Print(std::ostream& os);
V8_EXPORT_PRIVATE void Print();
V8_NOINLINE void Dump(v8::tracing::TracedValue* value);
ThreadId thread_id() const { return thread_id_; }
RuntimeCallTimer* current_timer() { return current_timer_.Value(); }
RuntimeCallCounter* current_counter() { return current_counter_.Value(); }
bool InUse() { return in_use_; }
bool IsCalledOnTheSameThread();
static const int kNumberOfCounters =
static_cast<int>(RuntimeCallCounterId::kNumberOfCounters);
RuntimeCallCounter* GetCounter(RuntimeCallCounterId counter_id) {
return &counters_[static_cast<int>(counter_id)];
}
RuntimeCallCounter* GetCounter(int counter_id) {
return &counters_[counter_id];
}
private:
// Top of a stack of active timers.
base::AtomicValue<RuntimeCallTimer*> current_timer_;
// Active counter object associated with current timer.
base::AtomicValue<RuntimeCallCounter*> current_counter_;
// Used to track nested tracing scopes.
bool in_use_;
ThreadId thread_id_;
RuntimeCallCounter counters_[kNumberOfCounters];
};
class WorkerThreadRuntimeCallStats final {
public:
WorkerThreadRuntimeCallStats();
~WorkerThreadRuntimeCallStats();
// Returns the TLS key associated with this WorkerThreadRuntimeCallStats.
base::Thread::LocalStorageKey GetKey();
// Returns a new worker thread runtime call stats table managed by this
// WorkerThreadRuntimeCallStats.
RuntimeCallStats* NewTable();
// Adds the counters from the worker thread tables to |main_call_stats|.
void AddToMainTable(RuntimeCallStats* main_call_stats);
private:
base::Mutex mutex_;
std::vector<std::unique_ptr<RuntimeCallStats>> tables_;
base::Optional<base::Thread::LocalStorageKey> tls_key_;
};
// Creating a WorkerThreadRuntimeCallStatsScope will provide a thread-local
// runtime call stats table, and will dump the table to an immediate trace event
// when it is destroyed.
class WorkerThreadRuntimeCallStatsScope final {
public:
WorkerThreadRuntimeCallStatsScope(
WorkerThreadRuntimeCallStats* off_thread_stats);
~WorkerThreadRuntimeCallStatsScope();
RuntimeCallStats* Get() const { return table_; }
private:
RuntimeCallStats* table_;
};
#define CHANGE_CURRENT_RUNTIME_COUNTER(runtime_call_stats, counter_id) \
do { \
if (V8_UNLIKELY(TracingFlags::is_runtime_stats_enabled()) && \
runtime_call_stats) { \
runtime_call_stats->CorrectCurrentCounterId(counter_id); \
} \
} while (false)
#define TRACE_HANDLER_STATS(isolate, counter_name) \
CHANGE_CURRENT_RUNTIME_COUNTER( \
isolate->counters()->runtime_call_stats(), \
RuntimeCallCounterId::kHandler_##counter_name)
// A RuntimeCallTimerScopes wraps around a RuntimeCallTimer to measure the
// the time of C++ scope.
class RuntimeCallTimerScope {
public:
inline RuntimeCallTimerScope(Isolate* isolate,
RuntimeCallCounterId counter_id);
// This constructor is here just to avoid calling GetIsolate() when the
// stats are disabled and the isolate is not directly available.
inline RuntimeCallTimerScope(Isolate* isolate, HeapObject heap_object,
RuntimeCallCounterId counter_id);
inline RuntimeCallTimerScope(RuntimeCallStats* stats,
RuntimeCallCounterId counter_id) {
if (V8_LIKELY(!TracingFlags::is_runtime_stats_enabled() ||
stats == nullptr))
return;
stats_ = stats;
stats_->Enter(&timer_, counter_id);
}
inline ~RuntimeCallTimerScope() {
if (V8_UNLIKELY(stats_ != nullptr)) {
stats_->Leave(&timer_);
}
}
private:
RuntimeCallStats* stats_ = nullptr;
RuntimeCallTimer timer_;
DISALLOW_COPY_AND_ASSIGN(RuntimeCallTimerScope);
};
#define HISTOGRAM_RANGE_LIST(HR) \
/* Generic range histograms: HR(name, caption, min, max, num_buckets) */ \
HR(background_marking, V8.GCBackgroundMarking, 0, 10000, 101) \
HR(background_scavenger, V8.GCBackgroundScavenger, 0, 10000, 101) \
HR(background_sweeping, V8.GCBackgroundSweeping, 0, 10000, 101) \
HR(detached_context_age_in_gc, V8.DetachedContextAgeInGC, 0, 20, 21) \
HR(code_cache_reject_reason, V8.CodeCacheRejectReason, 1, 6, 6) \
HR(errors_thrown_per_context, V8.ErrorsThrownPerContext, 0, 200, 20) \
HR(debug_feature_usage, V8.DebugFeatureUsage, 1, 7, 7) \
HR(incremental_marking_reason, V8.GCIncrementalMarkingReason, 0, 21, 22) \
HR(incremental_marking_sum, V8.GCIncrementalMarkingSum, 0, 10000, 101) \
HR(mark_compact_reason, V8.GCMarkCompactReason, 0, 21, 22) \
HR(gc_finalize_clear, V8.GCFinalizeMC.Clear, 0, 10000, 101) \
HR(gc_finalize_epilogue, V8.GCFinalizeMC.Epilogue, 0, 10000, 101) \
HR(gc_finalize_evacuate, V8.GCFinalizeMC.Evacuate, 0, 10000, 101) \
HR(gc_finalize_finish, V8.GCFinalizeMC.Finish, 0, 10000, 101) \
HR(gc_finalize_mark, V8.GCFinalizeMC.Mark, 0, 10000, 101) \
HR(gc_finalize_prologue, V8.GCFinalizeMC.Prologue, 0, 10000, 101) \
HR(gc_finalize_sweep, V8.GCFinalizeMC.Sweep, 0, 10000, 101) \
HR(gc_scavenger_scavenge_main, V8.GCScavenger.ScavengeMain, 0, 10000, 101) \
HR(gc_scavenger_scavenge_roots, V8.GCScavenger.ScavengeRoots, 0, 10000, 101) \
HR(gc_mark_compactor, V8.GCMarkCompactor, 0, 10000, 101) \
HR(scavenge_reason, V8.GCScavengeReason, 0, 21, 22) \
HR(young_generation_handling, V8.GCYoungGenerationHandling, 0, 2, 3) \
/* Asm/Wasm. */ \
HR(wasm_functions_per_asm_module, V8.WasmFunctionsPerModule.asm, 1, 1000000, \
51) \
HR(wasm_functions_per_wasm_module, V8.WasmFunctionsPerModule.wasm, 1, \
1000000, 51) \
HR(array_buffer_big_allocations, V8.ArrayBufferLargeAllocations, 0, 4096, \
13) \
HR(array_buffer_new_size_failures, V8.ArrayBufferNewSizeFailures, 0, 4096, \
13) \
HR(shared_array_allocations, V8.SharedArrayAllocationSizes, 0, 4096, 13) \
HR(wasm_asm_function_size_bytes, V8.WasmFunctionSizeBytes.asm, 1, GB, 51) \
HR(wasm_wasm_function_size_bytes, V8.WasmFunctionSizeBytes.wasm, 1, GB, 51) \
HR(wasm_asm_module_size_bytes, V8.WasmModuleSizeBytes.asm, 1, GB, 51) \
HR(wasm_wasm_module_size_bytes, V8.WasmModuleSizeBytes.wasm, 1, GB, 51) \
HR(wasm_asm_min_mem_pages_count, V8.WasmMinMemPagesCount.asm, 1, 2 << 16, \
51) \
HR(wasm_wasm_min_mem_pages_count, V8.WasmMinMemPagesCount.wasm, 1, 2 << 16, \
51) \
HR(wasm_wasm_max_mem_pages_count, V8.WasmMaxMemPagesCount.wasm, 1, 2 << 16, \
51) \
HR(wasm_decode_asm_module_peak_memory_bytes, \
V8.WasmDecodeModulePeakMemoryBytes.asm, 1, GB, 51) \
HR(wasm_decode_wasm_module_peak_memory_bytes, \
V8.WasmDecodeModulePeakMemoryBytes.wasm, 1, GB, 51) \
HR(asm_wasm_translation_peak_memory_bytes, \
V8.AsmWasmTranslationPeakMemoryBytes, 1, GB, 51) \
HR(wasm_compile_function_peak_memory_bytes, \
V8.WasmCompileFunctionPeakMemoryBytes, 1, GB, 51) \
HR(asm_module_size_bytes, V8.AsmModuleSizeBytes, 1, GB, 51) \
HR(asm_wasm_translation_throughput, V8.AsmWasmTranslationThroughput, 1, 100, \
20) \
HR(wasm_lazy_compilation_throughput, V8.WasmLazyCompilationThroughput, 1, \
10000, 50) \
HR(compile_script_cache_behaviour, V8.CompileScript.CacheBehaviour, 0, 20, \
21) \
HR(wasm_memory_allocation_result, V8.WasmMemoryAllocationResult, 0, 3, 4) \
HR(wasm_address_space_usage_mb, V8.WasmAddressSpaceUsageMiB, 0, 1 << 20, \
128) \
/* code size of live modules, collected on GC */ \
HR(wasm_module_code_size_mb, V8.WasmModuleCodeSizeMiB, 0, 1024, 64) \
/* code size of modules after baseline compilation */ \
HR(wasm_module_code_size_mb_after_baseline, \
V8.WasmModuleCodeSizeBaselineMiB, 0, 1024, 64) \
/* code size of modules after top-tier compilation */ \
HR(wasm_module_code_size_mb_after_top_tier, V8.WasmModuleCodeSizeTopTierMiB, \
0, 1024, 64)
#define HISTOGRAM_TIMER_LIST(HT) \
/* Timer histograms, not thread safe: HT(name, caption, max, unit) */ \
/* Garbage collection timers. */ \
HT(gc_context, V8.GCContext, 10000, \
MILLISECOND) /* GC context cleanup time */ \
HT(gc_idle_notification, V8.GCIdleNotification, 10000, MILLISECOND) \
HT(gc_incremental_marking, V8.GCIncrementalMarking, 10000, MILLISECOND) \
HT(gc_incremental_marking_start, V8.GCIncrementalMarkingStart, 10000, \
MILLISECOND) \
HT(gc_incremental_marking_finalize, V8.GCIncrementalMarkingFinalize, 10000, \
MILLISECOND) \
HT(gc_low_memory_notification, V8.GCLowMemoryNotification, 10000, \
MILLISECOND) \
/* Compilation times. */ \
HT(collect_source_positions, V8.CollectSourcePositions, 1000000, \
MICROSECOND) \
HT(compile, V8.CompileMicroSeconds, 1000000, MICROSECOND) \
HT(compile_eval, V8.CompileEvalMicroSeconds, 1000000, MICROSECOND) \
/* Serialization as part of compilation (code caching) */ \
HT(compile_serialize, V8.CompileSerializeMicroSeconds, 100000, MICROSECOND) \
HT(compile_deserialize, V8.CompileDeserializeMicroSeconds, 1000000, \
MICROSECOND) \
/* Total compilation time incl. caching/parsing */ \
HT(compile_script, V8.CompileScriptMicroSeconds, 1000000, MICROSECOND) \
/* Total JavaScript execution time (including callbacks and runtime calls */ \
HT(execute, V8.Execute, 1000000, MICROSECOND) \
/* Asm/Wasm */ \
HT(asm_wasm_translation_time, V8.AsmWasmTranslationMicroSeconds, 1000000, \
MICROSECOND) \
HT(wasm_lazy_compilation_time, V8.WasmLazyCompilationMicroSeconds, 1000000, \
MICROSECOND)
#define TIMED_HISTOGRAM_LIST(HT) \
/* Timer histograms, thread safe: HT(name, caption, max, unit) */ \
/* Garbage collection timers. */ \
HT(gc_compactor, V8.GCCompactor, 10000, MILLISECOND) \
HT(gc_compactor_background, V8.GCCompactorBackground, 10000, MILLISECOND) \
HT(gc_compactor_foreground, V8.GCCompactorForeground, 10000, MILLISECOND) \
HT(gc_finalize, V8.GCFinalizeMC, 10000, MILLISECOND) \
HT(gc_finalize_background, V8.GCFinalizeMCBackground, 10000, MILLISECOND) \
HT(gc_finalize_foreground, V8.GCFinalizeMCForeground, 10000, MILLISECOND) \
HT(gc_finalize_reduce_memory, V8.GCFinalizeMCReduceMemory, 10000, \
MILLISECOND) \
HT(gc_finalize_reduce_memory_background, \
V8.GCFinalizeMCReduceMemoryBackground, 10000, MILLISECOND) \
HT(gc_finalize_reduce_memory_foreground, \
V8.GCFinalizeMCReduceMemoryForeground, 10000, MILLISECOND) \
HT(gc_scavenger, V8.GCScavenger, 10000, MILLISECOND) \
HT(gc_scavenger_background, V8.GCScavengerBackground, 10000, MILLISECOND) \
HT(gc_scavenger_foreground, V8.GCScavengerForeground, 10000, MILLISECOND) \
/* Wasm timers. */ \
HT(wasm_decode_asm_module_time, V8.WasmDecodeModuleMicroSeconds.asm, \
1000000, MICROSECOND) \
HT(wasm_decode_wasm_module_time, V8.WasmDecodeModuleMicroSeconds.wasm, \
1000000, MICROSECOND) \
HT(wasm_decode_asm_function_time, V8.WasmDecodeFunctionMicroSeconds.asm, \
1000000, MICROSECOND) \
HT(wasm_decode_wasm_function_time, V8.WasmDecodeFunctionMicroSeconds.wasm, \
1000000, MICROSECOND) \
HT(wasm_compile_asm_module_time, V8.WasmCompileModuleMicroSeconds.asm, \
10000000, MICROSECOND) \
HT(wasm_compile_wasm_module_time, V8.WasmCompileModuleMicroSeconds.wasm, \
10000000, MICROSECOND) \
HT(wasm_compile_asm_function_time, V8.WasmCompileFunctionMicroSeconds.asm, \
1000000, MICROSECOND) \
HT(wasm_compile_wasm_function_time, V8.WasmCompileFunctionMicroSeconds.wasm, \
1000000, MICROSECOND) \
HT(liftoff_compile_time, V8.LiftoffCompileMicroSeconds, 10000000, \
MICROSECOND) \
HT(wasm_instantiate_wasm_module_time, \
V8.WasmInstantiateModuleMicroSeconds.wasm, 10000000, MICROSECOND) \
HT(wasm_instantiate_asm_module_time, \
V8.WasmInstantiateModuleMicroSeconds.asm, 10000000, MICROSECOND) \
/* Total compilation time incl. caching/parsing for various cache states. */ \
HT(compile_script_with_produce_cache, \
V8.CompileScriptMicroSeconds.ProduceCache, 1000000, MICROSECOND) \
HT(compile_script_with_isolate_cache_hit, \
V8.CompileScriptMicroSeconds.IsolateCacheHit, 1000000, MICROSECOND) \
HT(compile_script_with_consume_cache, \
V8.CompileScriptMicroSeconds.ConsumeCache, 1000000, MICROSECOND) \
HT(compile_script_consume_failed, \
V8.CompileScriptMicroSeconds.ConsumeCache.Failed, 1000000, MICROSECOND) \
HT(compile_script_no_cache_other, \
V8.CompileScriptMicroSeconds.NoCache.Other, 1000000, MICROSECOND) \
HT(compile_script_no_cache_because_inline_script, \
V8.CompileScriptMicroSeconds.NoCache.InlineScript, 1000000, MICROSECOND) \
HT(compile_script_no_cache_because_script_too_small, \
V8.CompileScriptMicroSeconds.NoCache.ScriptTooSmall, 1000000, \
MICROSECOND) \
HT(compile_script_no_cache_because_cache_too_cold, \
V8.CompileScriptMicroSeconds.NoCache.CacheTooCold, 1000000, MICROSECOND) \
HT(compile_script_on_background, \
V8.CompileScriptMicroSeconds.BackgroundThread, 1000000, MICROSECOND) \
HT(compile_function_on_background, \
V8.CompileFunctionMicroSeconds.BackgroundThread, 1000000, MICROSECOND)
#define AGGREGATABLE_HISTOGRAM_TIMER_LIST(AHT) \
AHT(compile_lazy, V8.CompileLazyMicroSeconds)
#define HISTOGRAM_PERCENTAGE_LIST(HP) \
/* Heap fragmentation. */ \
HP(external_fragmentation_total, V8.MemoryExternalFragmentationTotal) \
HP(external_fragmentation_old_space, V8.MemoryExternalFragmentationOldSpace) \
HP(external_fragmentation_code_space, \
V8.MemoryExternalFragmentationCodeSpace) \
HP(external_fragmentation_map_space, V8.MemoryExternalFragmentationMapSpace) \
HP(external_fragmentation_lo_space, V8.MemoryExternalFragmentationLoSpace)
// Note: These use Histogram with options (min=1000, max=500000, buckets=50).
#define HISTOGRAM_LEGACY_MEMORY_LIST(HM) \
HM(heap_sample_total_committed, V8.MemoryHeapSampleTotalCommitted) \
HM(heap_sample_total_used, V8.MemoryHeapSampleTotalUsed) \
HM(heap_sample_map_space_committed, V8.MemoryHeapSampleMapSpaceCommitted) \
HM(heap_sample_code_space_committed, V8.MemoryHeapSampleCodeSpaceCommitted) \
HM(heap_sample_maximum_committed, V8.MemoryHeapSampleMaximumCommitted)
// WARNING: STATS_COUNTER_LIST_* is a very large macro that is causing MSVC
// Intellisense to crash. It was broken into two macros (each of length 40
// lines) rather than one macro (of length about 80 lines) to work around
// this problem. Please avoid using recursive macros of this length when
// possible.
#define STATS_COUNTER_LIST_1(SC) \
/* Global Handle Count*/ \
SC(global_handles, V8.GlobalHandles) \
/* OS Memory allocated */ \
SC(memory_allocated, V8.OsMemoryAllocated) \
SC(maps_normalized, V8.MapsNormalized) \
SC(maps_created, V8.MapsCreated) \
SC(elements_transitions, V8.ObjectElementsTransitions) \
SC(props_to_dictionary, V8.ObjectPropertiesToDictionary) \
SC(elements_to_dictionary, V8.ObjectElementsToDictionary) \
SC(alive_after_last_gc, V8.AliveAfterLastGC) \
SC(objs_since_last_young, V8.ObjsSinceLastYoung) \
SC(objs_since_last_full, V8.ObjsSinceLastFull) \
SC(string_table_capacity, V8.StringTableCapacity) \
SC(number_of_symbols, V8.NumberOfSymbols) \
SC(inlined_copied_elements, V8.InlinedCopiedElements) \
SC(compilation_cache_hits, V8.CompilationCacheHits) \
SC(compilation_cache_misses, V8.CompilationCacheMisses) \
/* Amount of evaled source code. */ \
SC(total_eval_size, V8.TotalEvalSize) \
/* Amount of loaded source code. */ \
SC(total_load_size, V8.TotalLoadSize) \
/* Amount of parsed source code. */ \
SC(total_parse_size, V8.TotalParseSize) \
/* Amount of source code skipped over using preparsing. */ \
SC(total_preparse_skipped, V8.TotalPreparseSkipped) \
/* Amount of compiled source code. */ \
SC(total_compile_size, V8.TotalCompileSize) \
/* Amount of source code compiled with the full codegen. */ \
SC(total_full_codegen_source_size, V8.TotalFullCodegenSourceSize) \
/* Number of contexts created from scratch. */ \
SC(contexts_created_from_scratch, V8.ContextsCreatedFromScratch) \
/* Number of contexts created by partial snapshot. */ \
SC(contexts_created_by_snapshot, V8.ContextsCreatedBySnapshot) \
/* Number of code objects found from pc. */ \
SC(pc_to_code, V8.PcToCode) \
SC(pc_to_code_cached, V8.PcToCodeCached) \
/* The store-buffer implementation of the write barrier. */ \
SC(store_buffer_overflows, V8.StoreBufferOverflows)
#define STATS_COUNTER_LIST_2(SC) \
/* Amount of (JS) compiled code. */ \
SC(total_compiled_code_size, V8.TotalCompiledCodeSize) \
SC(gc_compactor_caused_by_request, V8.GCCompactorCausedByRequest) \
SC(gc_compactor_caused_by_promoted_data, V8.GCCompactorCausedByPromotedData) \
SC(gc_compactor_caused_by_oldspace_exhaustion, \
V8.GCCompactorCausedByOldspaceExhaustion) \
SC(gc_last_resort_from_js, V8.GCLastResortFromJS) \
SC(gc_last_resort_from_handles, V8.GCLastResortFromHandles) \
SC(ic_keyed_load_generic_smi, V8.ICKeyedLoadGenericSmi) \
SC(ic_keyed_load_generic_symbol, V8.ICKeyedLoadGenericSymbol) \
SC(ic_keyed_load_generic_slow, V8.ICKeyedLoadGenericSlow) \
SC(ic_named_load_global_stub, V8.ICNamedLoadGlobalStub) \
SC(ic_store_normal_miss, V8.ICStoreNormalMiss) \
SC(ic_store_normal_hit, V8.ICStoreNormalHit) \
SC(ic_binary_op_miss, V8.ICBinaryOpMiss) \
SC(ic_compare_miss, V8.ICCompareMiss) \
SC(ic_call_miss, V8.ICCallMiss) \
SC(ic_keyed_call_miss, V8.ICKeyedCallMiss) \
SC(ic_store_miss, V8.ICStoreMiss) \
SC(ic_keyed_store_miss, V8.ICKeyedStoreMiss) \
SC(cow_arrays_converted, V8.COWArraysConverted) \
SC(constructed_objects, V8.ConstructedObjects) \
SC(constructed_objects_runtime, V8.ConstructedObjectsRuntime) \
SC(megamorphic_stub_cache_probes, V8.MegamorphicStubCacheProbes) \
SC(megamorphic_stub_cache_misses, V8.MegamorphicStubCacheMisses) \
SC(megamorphic_stub_cache_updates, V8.MegamorphicStubCacheUpdates) \
SC(enum_cache_hits, V8.EnumCacheHits) \
SC(enum_cache_misses, V8.EnumCacheMisses) \
SC(fast_new_closure_total, V8.FastNewClosureTotal) \
SC(string_add_runtime, V8.StringAddRuntime) \
SC(string_add_native, V8.StringAddNative) \
SC(sub_string_runtime, V8.SubStringRuntime) \
SC(sub_string_native, V8.SubStringNative) \
SC(regexp_entry_runtime, V8.RegExpEntryRuntime) \
SC(regexp_entry_native, V8.RegExpEntryNative) \
SC(math_exp_runtime, V8.MathExpRuntime) \
SC(math_log_runtime, V8.MathLogRuntime) \
SC(math_pow_runtime, V8.MathPowRuntime) \
SC(stack_interrupts, V8.StackInterrupts) \
SC(runtime_profiler_ticks, V8.RuntimeProfilerTicks) \
SC(runtime_calls, V8.RuntimeCalls) \
SC(bounds_checks_eliminated, V8.BoundsChecksEliminated) \
SC(bounds_checks_hoisted, V8.BoundsChecksHoisted) \
SC(soft_deopts_requested, V8.SoftDeoptsRequested) \
SC(soft_deopts_inserted, V8.SoftDeoptsInserted) \
SC(soft_deopts_executed, V8.SoftDeoptsExecuted) \
/* Number of write barriers in generated code. */ \
SC(write_barriers_dynamic, V8.WriteBarriersDynamic) \
SC(write_barriers_static, V8.WriteBarriersStatic) \
SC(new_space_bytes_available, V8.MemoryNewSpaceBytesAvailable) \
SC(new_space_bytes_committed, V8.MemoryNewSpaceBytesCommitted) \
SC(new_space_bytes_used, V8.MemoryNewSpaceBytesUsed) \
SC(old_space_bytes_available, V8.MemoryOldSpaceBytesAvailable) \
SC(old_space_bytes_committed, V8.MemoryOldSpaceBytesCommitted) \
SC(old_space_bytes_used, V8.MemoryOldSpaceBytesUsed) \
SC(code_space_bytes_available, V8.MemoryCodeSpaceBytesAvailable) \
SC(code_space_bytes_committed, V8.MemoryCodeSpaceBytesCommitted) \
SC(code_space_bytes_used, V8.MemoryCodeSpaceBytesUsed) \
SC(map_space_bytes_available, V8.MemoryMapSpaceBytesAvailable) \
SC(map_space_bytes_committed, V8.MemoryMapSpaceBytesCommitted) \
SC(map_space_bytes_used, V8.MemoryMapSpaceBytesUsed) \
SC(lo_space_bytes_available, V8.MemoryLoSpaceBytesAvailable) \
SC(lo_space_bytes_committed, V8.MemoryLoSpaceBytesCommitted) \
SC(lo_space_bytes_used, V8.MemoryLoSpaceBytesUsed) \
/* Total code size (including metadata) of baseline code or bytecode. */ \
SC(total_baseline_code_size, V8.TotalBaselineCodeSize) \
/* Total count of functions compiled using the baseline compiler. */ \
SC(total_baseline_compile_count, V8.TotalBaselineCompileCount)
#define STATS_COUNTER_TS_LIST(SC) \
SC(wasm_generated_code_size, V8.WasmGeneratedCodeBytes) \
SC(wasm_reloc_size, V8.WasmRelocBytes) \
SC(wasm_lazily_compiled_functions, V8.WasmLazilyCompiledFunctions) \
SC(liftoff_compiled_functions, V8.LiftoffCompiledFunctions) \
SC(liftoff_unsupported_functions, V8.LiftoffUnsupportedFunctions)
// This file contains all the v8 counters that are in use.
class Counters : public std::enable_shared_from_this<Counters> {
public:
explicit Counters(Isolate* isolate);
// Register an application-defined function for recording
// subsequent counter statistics. Note: Must be called on the main
// thread.
void ResetCounterFunction(CounterLookupCallback f);
// Register an application-defined function to create histograms for
// recording subsequent histogram samples. Note: Must be called on
// the main thread.
void ResetCreateHistogramFunction(CreateHistogramCallback f);
// Register an application-defined function to add a sample
// to a histogram. Will be used in all subsequent sample additions.
// Note: Must be called on the main thread.
void SetAddHistogramSampleFunction(AddHistogramSampleCallback f) {
stats_table_.SetAddHistogramSampleFunction(f);
}
#define HR(name, caption, min, max, num_buckets) \
Histogram* name() { return &name##_; }
HISTOGRAM_RANGE_LIST(HR)
#undef HR
#define HT(name, caption, max, res) \
HistogramTimer* name() { return &name##_; }
HISTOGRAM_TIMER_LIST(HT)
#undef HT
#define HT(name, caption, max, res) \
TimedHistogram* name() { return &name##_; }
TIMED_HISTOGRAM_LIST(HT)
#undef HT
#define AHT(name, caption) \
AggregatableHistogramTimer* name() { return &name##_; }
AGGREGATABLE_HISTOGRAM_TIMER_LIST(AHT)
#undef AHT
#define HP(name, caption) \
Histogram* name() { return &name##_; }
HISTOGRAM_PERCENTAGE_LIST(HP)
#undef HP
#define HM(name, caption) \
Histogram* name() { return &name##_; }
HISTOGRAM_LEGACY_MEMORY_LIST(HM)
#undef HM
#define SC(name, caption) \
StatsCounter* name() { return &name##_; }
STATS_COUNTER_LIST_1(SC)
STATS_COUNTER_LIST_2(SC)
#undef SC
#define SC(name, caption) \
StatsCounterThreadSafe* name() { return &name##_; }
STATS_COUNTER_TS_LIST(SC)
#undef SC
// clang-format off
enum Id {
#define RATE_ID(name, caption, max, res) k_##name,
HISTOGRAM_TIMER_LIST(RATE_ID)
TIMED_HISTOGRAM_LIST(RATE_ID)
#undef RATE_ID
#define AGGREGATABLE_ID(name, caption) k_##name,
AGGREGATABLE_HISTOGRAM_TIMER_LIST(AGGREGATABLE_ID)
#undef AGGREGATABLE_ID
#define PERCENTAGE_ID(name, caption) k_##name,
HISTOGRAM_PERCENTAGE_LIST(PERCENTAGE_ID)
#undef PERCENTAGE_ID
#define MEMORY_ID(name, caption) k_##name,
HISTOGRAM_LEGACY_MEMORY_LIST(MEMORY_ID)
#undef MEMORY_ID
#define COUNTER_ID(name, caption) k_##name,
STATS_COUNTER_LIST_1(COUNTER_ID)
STATS_COUNTER_LIST_2(COUNTER_ID)
STATS_COUNTER_TS_LIST(COUNTER_ID)
#undef COUNTER_ID
#define COUNTER_ID(name) kCountOf##name, kSizeOf##name,
INSTANCE_TYPE_LIST(COUNTER_ID)
#undef COUNTER_ID
#define COUNTER_ID(name) kCountOfCODE_TYPE_##name, \
kSizeOfCODE_TYPE_##name,
CODE_KIND_LIST(COUNTER_ID)
#undef COUNTER_ID
#define COUNTER_ID(name) kCountOfFIXED_ARRAY__##name, \
kSizeOfFIXED_ARRAY__##name,
FIXED_ARRAY_SUB_INSTANCE_TYPE_LIST(COUNTER_ID)
#undef COUNTER_ID
stats_counter_count
};
// clang-format on
RuntimeCallStats* runtime_call_stats() { return &runtime_call_stats_; }
WorkerThreadRuntimeCallStats* worker_thread_runtime_call_stats() {
return &worker_thread_runtime_call_stats_;
}
private:
friend class StatsTable;
friend class StatsCounterBase;
friend class Histogram;
friend class HistogramTimer;
Isolate* isolate_;
StatsTable stats_table_;
int* FindLocation(const char* name) {
return stats_table_.FindLocation(name);
}
void* CreateHistogram(const char* name, int min, int max, size_t buckets) {
return stats_table_.CreateHistogram(name, min, max, buckets);
}
void AddHistogramSample(void* histogram, int sample) {
stats_table_.AddHistogramSample(histogram, sample);
}
Isolate* isolate() { return isolate_; }
#define HR(name, caption, min, max, num_buckets) Histogram name##_;
HISTOGRAM_RANGE_LIST(HR)
#undef HR
#define HT(name, caption, max, res) HistogramTimer name##_;
HISTOGRAM_TIMER_LIST(HT)
#undef HT
#define HT(name, caption, max, res) TimedHistogram name##_;
TIMED_HISTOGRAM_LIST(HT)
#undef HT
#define AHT(name, caption) \
AggregatableHistogramTimer name##_;
AGGREGATABLE_HISTOGRAM_TIMER_LIST(AHT)
#undef AHT
#define HP(name, caption) \
Histogram name##_;
HISTOGRAM_PERCENTAGE_LIST(HP)
#undef HP
#define HM(name, caption) \
Histogram name##_;
HISTOGRAM_LEGACY_MEMORY_LIST(HM)
#undef HM
#define SC(name, caption) \
StatsCounter name##_;
STATS_COUNTER_LIST_1(SC)
STATS_COUNTER_LIST_2(SC)
#undef SC
#define SC(name, caption) StatsCounterThreadSafe name##_;
STATS_COUNTER_TS_LIST(SC)
#undef SC
#define SC(name) \
StatsCounter size_of_##name##_; \
StatsCounter count_of_##name##_;
INSTANCE_TYPE_LIST(SC)
#undef SC
#define SC(name) \
StatsCounter size_of_CODE_TYPE_##name##_; \
StatsCounter count_of_CODE_TYPE_##name##_;
CODE_KIND_LIST(SC)
#undef SC
#define SC(name) \
StatsCounter size_of_FIXED_ARRAY_##name##_; \
StatsCounter count_of_FIXED_ARRAY_##name##_;
FIXED_ARRAY_SUB_INSTANCE_TYPE_LIST(SC)
#undef SC
RuntimeCallStats runtime_call_stats_;
WorkerThreadRuntimeCallStats worker_thread_runtime_call_stats_;
DISALLOW_IMPLICIT_CONSTRUCTORS(Counters);
};
void HistogramTimer::Start() {
TimedHistogram::Start(&timer_, counters()->isolate());
}
void HistogramTimer::Stop() {
TimedHistogram::Stop(&timer_, counters()->isolate());
}
RuntimeCallTimerScope::RuntimeCallTimerScope(Isolate* isolate,
RuntimeCallCounterId counter_id) {
if (V8_LIKELY(!TracingFlags::is_runtime_stats_enabled())) return;
stats_ = isolate->counters()->runtime_call_stats();
stats_->Enter(&timer_, counter_id);
}
} // namespace internal
} // namespace v8
#endif // V8_COUNTERS_H_