1 2 /* 3 * Copyright 2011 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 #ifndef SkBenchTimer_DEFINED 9 #define SkBenchTimer_DEFINED 10 11 #include <SkTypes.h> 12 13 14 class BenchSysTimer; 15 class BenchGpuTimer; 16 17 class SkGLContextHelper; 18 19 /** 20 * SysTimers and GpuTimers are implemented orthogonally. 21 * This class combines 2 SysTimers and a GpuTimer into one single, 22 * platform specific Timer with a simple interface. The truncated 23 * timer doesn't include the time required for the GPU to finish 24 * its rendering. It should always be <= the un-truncated system 25 * times and (for GPU configurations) can be used to roughly (very 26 * roughly) gauge the GPU load/backlog. 27 */ 28 class BenchTimer { 29 public: 30 BenchTimer(SkGLContextHelper* gl = NULL); 31 ~BenchTimer(); 32 void start(double durationScale = 1); 33 void end(); 34 void truncatedEnd(); 35 double fCpu; 36 double fWall; 37 double fTruncatedCpu; 38 double fTruncatedWall; 39 double fGpu; 40 41 private: 42 BenchSysTimer* fSysTimer; 43 BenchSysTimer* fTruncatedSysTimer; 44 #if SK_SUPPORT_GPU 45 BenchGpuTimer* fGpuTimer; 46 #endif 47 double fDurationScale; // for this start/end session 48 }; 49 50 // Same as BenchTimer above, supporting only fWall but with much lower overhead. 51 // (Typically, ~30ns instead of BenchTimer's ~1us.) 52 class WallTimer { 53 public: 54 WallTimer(); 55 ~WallTimer(); 56 57 void start(double durationScale = 1); 58 void end(); 59 60 double fWall; 61 62 private: 63 BenchSysTimer* fSysTimer; 64 double fDurationScale; 65 }; 66 67 #endif 68
