Index: base/test/energy_monitor_mac.h |
diff --git a/base/test/energy_monitor_mac.h b/base/test/energy_monitor_mac.h |
new file mode 100644 |
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+++ b/base/test/energy_monitor_mac.h |
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+// Copyright 2015 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. |
+ |
+#ifndef BASE_TEST_ENERGY_MONITOR_MAC_H_ |
+#define BASE_TEST_ENERGY_MONITOR_MAC_H_ |
+ |
+#include <stdint.h> |
+#include <vector> |
+ |
+#include "base/callback.h" |
+#include "base/time/time.h" |
+ |
+namespace base { |
+ |
+class FilePath; |
+ |
+namespace test { |
+ |
+// Class that executes a base::RunLoop on the current thread, sampling power |
+// draw from Intel Machine-Specific Registers at regular intervals. |
+class EnergyMonitorMac { |
+ public: |
+ enum EnergyType { PROCESSOR, IA, NUM_ENERGY_TYPES }; |
+ |
+ EnergyMonitorMac(); |
+ ~EnergyMonitorMac(); |
+ |
+ // Executes a run loop on the current thread. Starts taking samples after |
+ // |warmup_delay|, and quits the runloop after taking num_samples. |
+ void Run(const base::TimeDelta& warmup_delay, size_t num_samples); |
+ |
+ // Set the sampling frequency. By default, each sample is taken after a 50 |
+ // millisecond delay by posting an event to the RunLoop. |
+ void SetSampleDelay(const base::TimeDelta& sample_delay); |
+ |
+ double GetAverageWatts(EnergyType type) const; |
+ double GetStdDevWatts(EnergyType type) const; |
+ |
+ void WriteTimeSeries(const base::FilePath& file); |
+ |
+ private: |
+ void ReadNextSample(); |
+ void TakeSample(); |
+ |
+ base::TimeDelta sample_delay_; |
+ size_t target_sample_count_ = ~0; |
+ base::Closure quit_closure_; |
+ |
+ struct { |
+ int msr_index = -1; |
+ std::vector<double> watts; |
+ } samples_[NUM_ENERGY_TYPES]; |
+ |
+ std::vector<uint64_t> rdtsc_values_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(EnergyMonitorMac); |
+}; |
+ |
+} // namespace test |
+} // namespace base |
+ |
+#endif // BASE_TEST_ENERGY_MONITOR_MAC_H_ |