kc3-lang/angle/util/Timer.h

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• Author : Lingfeng Yang
  Date : 2021-11-09 18:13:15
  Hash : e9f9fa17
  Message : Add cpu time measurement to perf tests Bug: angleproject:6667 Change-Id: I16570a7b51d363dd1c0f35789b985520cb76d488 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3270601 Commit-Queue: Lingfeng Yang <lfy@google.com> Reviewed-by: Tim Van Patten <timvp@google.com> Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Charlie Lao <cclao@google.com>

• util/Timer.h

• //
  // Copyright 2019 The ANGLE 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 SAMPLE_UTIL_TIMER_H
  #define SAMPLE_UTIL_TIMER_H
  
  class Timer final
  {
    public:
      Timer();
      ~Timer() {}
  
      // Use start() and stop() to record the duration and use getElapsedWallClockTime() to query that
      // duration.  If getElapsedWallClockTime() is called in between, it will report the elapsed time
      // since start().
      void start();
      void stop();
      double getElapsedWallClockTime() const;
      double getElapsedCpuTime() const;
  
    private:
      bool mRunning;
      double mStartTime;
      double mStopTime;
      double mStartCpuTime;
      double mStopCpuTime;
  };
  
  #endif  // SAMPLE_UTIL_TIMER_H