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// Copyright 2016 The Chromium 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 "base/bind.h"
#include "base/memory/ptr_util.h"
#include "base/memory/ref_counted_memory.h"
#include "base/run_loop.h"
#include "base/threading/thread.h"
#include "base/trace_event/trace_event.h"
#include "base/trace_event/trace_event_argument.h"
#include "perf_test_helpers.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace tracing {
namespace {
using base::Bind;
using base::Thread;
using base::Unretained;
using base::WaitableEvent;
using base::trace_event::TraceConfig;
using base::trace_event::TraceLog;
using base::trace_event::TraceRecordMode;
using base::trace_event::TracedValue;
const int kNumRuns = 10;
class TraceEventPerfTest : public ::testing::Test {
public:
void BeginTrace() {
TraceConfig config("*", "");
config.SetTraceRecordMode(TraceRecordMode::RECORD_CONTINUOUSLY);
TraceLog::GetInstance()->SetEnabled(config, TraceLog::RECORDING_MODE);
}
void EndTraceAndFlush() {
ScopedStopwatch stopwatch("flush");
base::RunLoop run_loop;
TraceLog::GetInstance()->SetDisabled();
TraceLog::GetInstance()->Flush(
Bind(&OnTraceDataCollected, run_loop.QuitClosure()));
run_loop.Run();
}
static void OnTraceDataCollected(
base::Closure quit_closure,
const scoped_refptr<base::RefCountedString>& events_str,
bool has_more_events) {
if (!has_more_events)
quit_closure.Run();
}
std::unique_ptr<TracedValue> MakeTracedValue(int counter) {
auto value = base::MakeUnique<TracedValue>();
value->SetInteger("counter", counter);
value->BeginDictionary("test_dict");
value->BeginArray("nodes");
for (int i = 0; i < 10; i++) {
value->BeginDictionary();
value->SetInteger("id", i);
value->SetBoolean("valid", true);
value->SetString("value", "foo");
value->EndDictionary();
}
value->EndArray();
value->SetInteger("count", 10);
value->EndDictionary();
return value;
}
static void SubmitTraceEventsAndSignal(WaitableEvent* complete_event) {
for (int i = 0; i < 10000; i++) {
TRACE_EVENT0("test_category", "some call");
}
complete_event->Signal();
}
private:
base::MessageLoop _message_loop;
};
TEST_F(TraceEventPerfTest, Submit_10000_TRACE_EVENT0) {
BeginTrace();
IterableStopwatch stopwatch("events");
for (int lap = 0; lap < kNumRuns; lap++) {
for (int i = 0; i < 10000; i++) {
TRACE_EVENT0("test_category", "TRACE_EVENT0 call");
}
stopwatch.NextLap();
}
EndTraceAndFlush();
}
TEST_F(TraceEventPerfTest, Long_TRACE_EVENT0) {
BeginTrace();
IterableStopwatch stopwatch("long_event");
for (int lap = 0; lap < kNumRuns; lap++) {
TRACE_EVENT0("test_category", "Outer event");
for (int i = 0; i < 10000; i++) {
TRACE_EVENT0("test_category", "TRACE_EVENT0 call");
}
stopwatch.NextLap();
}
EndTraceAndFlush();
}
TEST_F(TraceEventPerfTest, Create_10000_TracedValue) {
std::unique_ptr<TracedValue> value;
{
ScopedStopwatch value_sw("create_traced_values");
for (int i = 0; i < 10000; i++) {
value = MakeTracedValue(i);
}
}
}
TEST_F(TraceEventPerfTest, Submit_10000_TRACE_EVENT_with_TracedValue) {
BeginTrace();
// Time reported by this timer includes TracedValue creation as well.
IterableStopwatch trace_sw("events_with_value");
for (int lap = 0; lap < kNumRuns; lap++) {
for (int i = 0; i < 10000; i++) {
TRACE_EVENT_INSTANT1("test_category", "event_with_value",
TRACE_EVENT_SCOPE_THREAD, "value", MakeTracedValue(i));
}
trace_sw.NextLap();
}
EndTraceAndFlush();
}
TEST_F(TraceEventPerfTest, Submit_10000_TRACE_EVENT0_multithreaded) {
BeginTrace();
const int kNumThreads = 4;
std::vector<std::unique_ptr<Thread>> threads;
std::vector<std::unique_ptr<WaitableEvent>> complete_events;
for (int i = 0; i < kNumThreads; i++) {
Thread* thread = new Thread(std::string("thread_%d") + std::to_string(i));
WaitableEvent* complete_event =
new WaitableEvent(WaitableEvent::ResetPolicy::AUTOMATIC,
WaitableEvent::InitialState::NOT_SIGNALED);
threads.push_back(base::WrapUnique(thread));
complete_events.push_back(base::WrapUnique(complete_event));
thread->Start();
}
{
ScopedStopwatch stopwatch("events_over_multiple_threads");
for (int i = 0; i < kNumThreads; i++) {
threads[i]->task_runner()->PostTask(
FROM_HERE,
base::Bind(&SubmitTraceEventsAndSignal, complete_events[i].get()));
}
for (int i = 0; i < kNumThreads; i++) {
complete_events[i]->Wait();
}
}
EndTraceAndFlush();
for (int i = 0; i < kNumThreads; i++) {
threads[i]->Stop();
}
}
} // namespace
} // namespace tracing
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