90c471e73f
- use high-precision wall timer only - warm caches once before measuring - measure independent samples, calculating statistics - add --verbose to control how much data we output Also removed some unloved features from bench_record. BUG=skia: R=jcgregorio@google.com, mtklein@google.com Author: mtklein@chromium.org Review URL: https://codereview.chromium.org/338203002
68 lines
1.5 KiB
C++
68 lines
1.5 KiB
C++
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/*
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* Copyright 2011 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkBenchTimer_DEFINED
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#define SkBenchTimer_DEFINED
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#include <SkTypes.h>
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class BenchSysTimer;
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class BenchGpuTimer;
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class SkGLContextHelper;
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/**
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* SysTimers and GpuTimers are implemented orthogonally.
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* This class combines 2 SysTimers and a GpuTimer into one single,
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* platform specific Timer with a simple interface. The truncated
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* timer doesn't include the time required for the GPU to finish
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* its rendering. It should always be <= the un-truncated system
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* times and (for GPU configurations) can be used to roughly (very
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* roughly) gauge the GPU load/backlog.
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*/
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class BenchTimer {
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public:
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BenchTimer(SkGLContextHelper* gl = NULL);
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~BenchTimer();
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void start(double durationScale = 1);
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void end();
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void truncatedEnd();
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double fCpu;
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double fWall;
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double fTruncatedCpu;
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double fTruncatedWall;
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double fGpu;
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private:
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BenchSysTimer* fSysTimer;
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BenchSysTimer* fTruncatedSysTimer;
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#if SK_SUPPORT_GPU
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BenchGpuTimer* fGpuTimer;
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#endif
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double fDurationScale; // for this start/end session
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};
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// Same as BenchTimer above, supporting only fWall but with much lower overhead.
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// (Typically, ~30ns instead of BenchTimer's ~1us.)
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class WallTimer {
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public:
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WallTimer();
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~WallTimer();
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void start(double durationScale = 1);
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void end();
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double fWall;
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private:
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BenchSysTimer* fSysTimer;
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double fDurationScale;
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};
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#endif
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