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| 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 |
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