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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "base/base_switches.h" | 5 #include "base/base_switches.h" |
| 6 #include "base/bind.h" | 6 #include "base/bind.h" |
| 7 #include "base/command_line.h" | 7 #include "base/command_line.h" |
| 8 #include "base/location.h" | 8 #include "base/location.h" |
| 9 #include "base/memory/scoped_vector.h" | 9 #include "base/memory/scoped_vector.h" |
| 10 #include "base/single_thread_task_runner.h" | 10 #include "base/single_thread_task_runner.h" |
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| 41 switches::kProfilerTimingDisabledValue); | 41 switches::kProfilerTimingDisabledValue); |
| 42 } | 42 } |
| 43 | 43 |
| 44 // To be implemented by each test. Subclass must uses threads_ such that | 44 // To be implemented by each test. Subclass must uses threads_ such that |
| 45 // their cpu-time can be measured. Test must return from PingPong() _and_ | 45 // their cpu-time can be measured. Test must return from PingPong() _and_ |
| 46 // call FinishMeasurement from any thread to complete the test. | 46 // call FinishMeasurement from any thread to complete the test. |
| 47 virtual void Init() {} | 47 virtual void Init() {} |
| 48 virtual void PingPong(int hops) = 0; | 48 virtual void PingPong(int hops) = 0; |
| 49 virtual void Reset() {} | 49 virtual void Reset() {} |
| 50 | 50 |
| 51 void TimeOnThread(base::TimeTicks* ticks, base::WaitableEvent* done) { | 51 void TimeOnThread(base::ThreadTicks* ticks, base::WaitableEvent* done) { |
| 52 *ticks = base::TimeTicks::ThreadNow(); | 52 *ticks = base::ThreadTicks::Now(); |
| 53 done->Signal(); | 53 done->Signal(); |
| 54 } | 54 } |
| 55 | 55 |
| 56 base::TimeTicks ThreadNow(base::Thread* thread) { | 56 base::ThreadTicks ThreadNow(base::Thread* thread) { |
| 57 base::WaitableEvent done(false, false); | 57 base::WaitableEvent done(false, false); |
| 58 base::TimeTicks ticks; | 58 base::ThreadTicks ticks; |
| 59 thread->task_runner()->PostTask( | 59 thread->task_runner()->PostTask( |
| 60 FROM_HERE, base::Bind(&ThreadPerfTest::TimeOnThread, | 60 FROM_HERE, base::Bind(&ThreadPerfTest::TimeOnThread, |
| 61 base::Unretained(this), &ticks, &done)); | 61 base::Unretained(this), &ticks, &done)); |
| 62 done.Wait(); | 62 done.Wait(); |
| 63 return ticks; | 63 return ticks; |
| 64 } | 64 } |
| 65 | 65 |
| 66 void RunPingPongTest(const std::string& name, unsigned num_threads) { | 66 void RunPingPongTest(const std::string& name, unsigned num_threads) { |
| 67 // Create threads and collect starting cpu-time for each thread. | 67 // Create threads and collect starting cpu-time for each thread. |
| 68 std::vector<base::TimeTicks> thread_starts; | 68 std::vector<base::ThreadTicks> thread_starts; |
| 69 while (threads_.size() < num_threads) { | 69 while (threads_.size() < num_threads) { |
| 70 threads_.push_back(new base::Thread("PingPonger")); | 70 threads_.push_back(new base::Thread("PingPonger")); |
| 71 threads_.back()->Start(); | 71 threads_.back()->Start(); |
| 72 if (base::TimeTicks::IsThreadNowSupported()) | 72 if (base::ThreadTicks::IsSupported()) |
| 73 thread_starts.push_back(ThreadNow(threads_.back())); | 73 thread_starts.push_back(ThreadNow(threads_.back())); |
| 74 } | 74 } |
| 75 | 75 |
| 76 Init(); | 76 Init(); |
| 77 | 77 |
| 78 base::TimeTicks start = base::TimeTicks::Now(); | 78 base::TimeTicks start = base::TimeTicks::Now(); |
| 79 PingPong(kNumRuns); | 79 PingPong(kNumRuns); |
| 80 done_.Wait(); | 80 done_.Wait(); |
| 81 base::TimeTicks end = base::TimeTicks::Now(); | 81 base::TimeTicks end = base::TimeTicks::Now(); |
| 82 | 82 |
| 83 // Gather the cpu-time spent on each thread. This does one extra tasks, | 83 // Gather the cpu-time spent on each thread. This does one extra tasks, |
| 84 // but that should be in the noise given enough runs. | 84 // but that should be in the noise given enough runs. |
| 85 base::TimeDelta thread_time; | 85 base::TimeDelta thread_time; |
| 86 while (threads_.size()) { | 86 while (threads_.size()) { |
| 87 if (base::TimeTicks::IsThreadNowSupported()) { | 87 if (base::ThreadTicks::IsSupported()) { |
| 88 thread_time += ThreadNow(threads_.back()) - thread_starts.back(); | 88 thread_time += ThreadNow(threads_.back()) - thread_starts.back(); |
| 89 thread_starts.pop_back(); | 89 thread_starts.pop_back(); |
| 90 } | 90 } |
| 91 threads_.pop_back(); | 91 threads_.pop_back(); |
| 92 } | 92 } |
| 93 | 93 |
| 94 Reset(); | 94 Reset(); |
| 95 | 95 |
| 96 double num_runs = static_cast<double>(kNumRuns); | 96 double num_runs = static_cast<double>(kNumRuns); |
| 97 double us_per_task_clock = (end - start).InMicroseconds() / num_runs; | 97 double us_per_task_clock = (end - start).InMicroseconds() / num_runs; |
| 98 double us_per_task_cpu = thread_time.InMicroseconds() / num_runs; | 98 double us_per_task_cpu = thread_time.InMicroseconds() / num_runs; |
| 99 | 99 |
| 100 // Clock time per task. | 100 // Clock time per task. |
| 101 perf_test::PrintResult( | 101 perf_test::PrintResult( |
| 102 "task", "", name + "_time ", us_per_task_clock, "us/hop", true); | 102 "task", "", name + "_time ", us_per_task_clock, "us/hop", true); |
| 103 | 103 |
| 104 // Total utilization across threads if available (likely higher). | 104 // Total utilization across threads if available (likely higher). |
| 105 if (base::TimeTicks::IsThreadNowSupported()) { | 105 if (base::ThreadTicks::IsSupported()) { |
| 106 perf_test::PrintResult( | 106 perf_test::PrintResult( |
| 107 "task", "", name + "_cpu ", us_per_task_cpu, "us/hop", true); | 107 "task", "", name + "_cpu ", us_per_task_cpu, "us/hop", true); |
| 108 } | 108 } |
| 109 } | 109 } |
| 110 | 110 |
| 111 protected: | 111 protected: |
| 112 void FinishMeasurement() { done_.Signal(); } | 112 void FinishMeasurement() { done_.Signal(); } |
| 113 ScopedVector<base::Thread> threads_; | 113 ScopedVector<base::Thread> threads_; |
| 114 | 114 |
| 115 private: | 115 private: |
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| 299 typedef EventPerfTest<PthreadEvent> PthreadEventPerfTest; | 299 typedef EventPerfTest<PthreadEvent> PthreadEventPerfTest; |
| 300 TEST_F(PthreadEventPerfTest, EventPingPong) { | 300 TEST_F(PthreadEventPerfTest, EventPingPong) { |
| 301 RunPingPongTest("4_PthreadCondVar_Threads", 4); | 301 RunPingPongTest("4_PthreadCondVar_Threads", 4); |
| 302 } | 302 } |
| 303 | 303 |
| 304 #endif | 304 #endif |
| 305 | 305 |
| 306 } // namespace | 306 } // namespace |
| 307 | 307 |
| 308 } // namespace base | 308 } // namespace base |
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