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// Copyright 2016 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_COMPILER_DISPATCHER_COMPILER_DISPATCHER_TRACER_H_
#define V8_COMPILER_DISPATCHER_COMPILER_DISPATCHER_TRACER_H_
#include <utility>
#include "src/base/macros.h"
#include "src/base/platform/mutex.h"
#include "src/base/ring-buffer.h"
#include "src/counters.h"
#include "src/globals.h"
namespace v8 {
namespace internal {
class Isolate;
class RuntimeCallStats;
#define COMPILER_DISPATCHER_TRACE_SCOPE_WITH_NUM(tracer, scope_id, num) \
CompilerDispatcherTracer::ScopeID tracer_scope_id( \
CompilerDispatcherTracer::ScopeID::scope_id); \
CompilerDispatcherTracer::Scope trace_scope(tracer, tracer_scope_id, num); \
TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"), \
CompilerDispatcherTracer::Scope::Name(tracer_scope_id))
#define COMPILER_DISPATCHER_TRACE_SCOPE(tracer, scope_id) \
COMPILER_DISPATCHER_TRACE_SCOPE_WITH_NUM(tracer, scope_id, 0)
class V8_EXPORT_PRIVATE CompilerDispatcherTracer {
public:
enum class ScopeID { kPrepare, kCompile, kFinalize };
class Scope {
public:
Scope(CompilerDispatcherTracer* tracer, ScopeID scope_id, size_t num = 0);
~Scope();
static const char* Name(ScopeID scoped_id);
private:
CompilerDispatcherTracer* tracer_;
ScopeID scope_id_;
size_t num_;
double start_time_;
DISALLOW_COPY_AND_ASSIGN(Scope);
};
explicit CompilerDispatcherTracer(Isolate* isolate);
~CompilerDispatcherTracer();
void RecordPrepare(double duration_ms);
void RecordCompile(double duration_ms, size_t source_length);
void RecordFinalize(double duration_ms);
double EstimatePrepareInMs() const;
double EstimateCompileInMs(size_t source_length) const;
double EstimateFinalizeInMs() const;
void DumpStatistics() const;
private:
static double Average(const base::RingBuffer<double>& buffer);
static double Estimate(
const base::RingBuffer<std::pair<size_t, double>>& buffer, size_t num);
mutable base::Mutex mutex_;
base::RingBuffer<double> prepare_events_;
base::RingBuffer<std::pair<size_t, double>> compile_events_;
base::RingBuffer<double> finalize_events_;
RuntimeCallStats* runtime_call_stats_;
DISALLOW_COPY_AND_ASSIGN(CompilerDispatcherTracer);
};
} // namespace internal
} // namespace v8
#endif // V8_COMPILER_DISPATCHER_COMPILER_DISPATCHER_TRACER_H_
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