| /* |
| * Copyright 2014 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "Benchmark.h" |
| #include "CrashHandler.h" |
| #include "Stats.h" |
| #include "Timer.h" |
| |
| #include "SkCanvas.h" |
| #include "SkCommandLineFlags.h" |
| #include "SkForceLinking.h" |
| #include "SkGraphics.h" |
| #include "SkString.h" |
| #include "SkSurface.h" |
| |
| __SK_FORCE_IMAGE_DECODER_LINKING; |
| |
| DEFINE_int32(samples, 10, "Number of samples to measure for each bench."); |
| DEFINE_int32(overheadLoops, 100000, "Loops to estimate timer overhead."); |
| DEFINE_double(overheadGoal, 0.0001, |
| "Loop until timer overhead is at most this fraction of our measurments."); |
| DEFINE_string(match, "", "The usual filters on file names of benchmarks to measure."); |
| DEFINE_bool2(quiet, q, false, "Print only bench name and minimum sample."); |
| DEFINE_bool2(verbose, v, false, "Print all samples."); |
| DEFINE_string(config, "8888 nonrendering", |
| "Configs to measure. Options: 565 8888 nonrendering"); |
| |
| // TODO: GPU benches |
| |
| static SkString humanize(double ms) { |
| if (ms > 1e+3) return SkStringPrintf("%.3gs", ms/1e3); |
| if (ms < 1e-3) return SkStringPrintf("%.3gns", ms*1e6); |
| if (ms < 1) return SkStringPrintf("%.3gµs", ms*1e3); |
| return SkStringPrintf("%.3gms", ms); |
| } |
| |
| static double estimate_timer_overhead() { |
| double overhead = 0; |
| WallTimer timer; |
| for (int i = 0; i < FLAGS_overheadLoops; i++) { |
| timer.start(); |
| timer.end(); |
| overhead += timer.fWall; |
| } |
| return overhead / FLAGS_overheadLoops; |
| } |
| |
| static void safe_flush(SkCanvas* canvas) { |
| if (canvas) { |
| canvas->flush(); |
| } |
| } |
| |
| static int guess_loops(double overhead, Benchmark* bench, SkCanvas* canvas) { |
| WallTimer timer; |
| |
| // Measure timer overhead and bench time together. |
| do { |
| timer.start(); |
| bench->draw(1, canvas); |
| safe_flush(canvas); |
| timer.end(); |
| } while (timer.fWall < overhead); // Shouldn't normally happen. |
| |
| // Later we'll just start and stop the timer once, but loop N times. |
| // We'll pick N to make timer overhead negligible: |
| // |
| // Timer Overhead |
| // ------------------------------- < FLAGS_overheadGoal |
| // Timer Overhead + N * Bench Time |
| // |
| // where timer.fWall ≈ Timer Overhead + Bench Time. |
| // |
| // Doing some math, we get: |
| // |
| // (Timer Overhead / FLAGS_overheadGoal) - Timer Overhead |
| // ----------------------------------------------------- < N |
| // (timer.fWall - Timer Overhead) |
| // |
| // Luckily, this also works well in practice. :) |
| const double numer = overhead / FLAGS_overheadGoal - overhead; |
| const double denom = timer.fWall - overhead; |
| return (int)ceil(numer / denom); |
| } |
| |
| static bool push_config_if_enabled(const char* config, SkTDArray<const char*>* configs) { |
| if (FLAGS_config.contains(config)) { |
| configs->push(config); |
| return true; |
| } |
| return false; |
| } |
| |
| static void create_surfaces(Benchmark* bench, |
| SkTDArray<SkSurface*>* surfaces, |
| SkTDArray<const char*>* configs) { |
| |
| if (bench->isSuitableFor(Benchmark::kNonRendering_Backend) |
| && push_config_if_enabled("nonrendering", configs)) { |
| surfaces->push(NULL); |
| } |
| |
| if (bench->isSuitableFor(Benchmark::kRaster_Backend)) { |
| const int w = bench->getSize().fX, |
| h = bench->getSize().fY; |
| |
| if (push_config_if_enabled("8888", configs)) { |
| const SkImageInfo info = { w, h, kN32_SkColorType, kPremul_SkAlphaType }; |
| surfaces->push(SkSurface::NewRaster(info)); |
| } |
| |
| if (push_config_if_enabled("565", configs)) { |
| const SkImageInfo info = { w, h, kRGB_565_SkColorType, kOpaque_SkAlphaType }; |
| surfaces->push(SkSurface::NewRaster(info)); |
| } |
| } |
| } |
| |
| int tool_main(int argc, char** argv); |
| int tool_main(int argc, char** argv) { |
| SetupCrashHandler(); |
| SkAutoGraphics ag; |
| SkCommandLineFlags::Parse(argc, argv); |
| |
| const double overhead = estimate_timer_overhead(); |
| |
| if (FLAGS_verbose) { |
| // No header. |
| } else if (FLAGS_quiet) { |
| SkDebugf("min\tbench\tconfig\n"); |
| } else { |
| SkDebugf("loops\tmin\tmean\tmax\tstddev\tbench\tconfig\n"); |
| } |
| |
| for (const BenchRegistry* r = BenchRegistry::Head(); r != NULL; r = r->next()) { |
| SkAutoTDelete<Benchmark> bench(r->factory()(NULL)); |
| if (SkCommandLineFlags::ShouldSkip(FLAGS_match, bench->getName())) { |
| continue; |
| } |
| |
| SkTDArray<SkSurface*> surfaces; |
| SkTDArray<const char*> configs; |
| create_surfaces(bench.get(), &surfaces, &configs); |
| |
| bench->preDraw(); |
| for (int j = 0; j < surfaces.count(); j++) { |
| SkCanvas* canvas = surfaces[j] ? surfaces[j]->getCanvas() : NULL; |
| const char* config = configs[j]; |
| |
| bench->draw(1, canvas); // Just paranoid warmup. |
| safe_flush(canvas); |
| const int loops = guess_loops(overhead, bench.get(), canvas); |
| |
| SkAutoTMalloc<double> samples(FLAGS_samples); |
| WallTimer timer; |
| for (int i = 0; i < FLAGS_samples; i++) { |
| timer.start(); |
| bench->draw(loops, canvas); |
| safe_flush(canvas); |
| timer.end(); |
| samples[i] = timer.fWall / loops; |
| } |
| |
| Stats stats(samples.get(), FLAGS_samples); |
| |
| if (FLAGS_verbose) { |
| for (int i = 0; i < FLAGS_samples; i++) { |
| SkDebugf("%s ", humanize(samples[i]).c_str()); |
| } |
| SkDebugf("%s\n", bench->getName()); |
| } else if (FLAGS_quiet) { |
| if (configs.count() == 1) { |
| config = ""; // Only print the config if we run the same bench on more than one. |
| } |
| SkDebugf("%s\t%s\t%s\n", humanize(stats.min).c_str(), bench->getName(), config); |
| } else { |
| const double stddev_percent = 100 * sqrt(stats.var) / stats.mean; |
| SkDebugf("%d\t%s\t%s\t%s\t%.0f%%\t%s\t%s\n" |
| , loops |
| , humanize(stats.min).c_str() |
| , humanize(stats.mean).c_str() |
| , humanize(stats.max).c_str() |
| , stddev_percent |
| , bench->getName() |
| , config |
| ); |
| } |
| } |
| surfaces.deleteAll(); |
| } |
| |
| return 0; |
| } |
| |
| #if !defined SK_BUILD_FOR_IOS |
| int main(int argc, char * const argv[]) { |
| return tool_main(argc, (char**) argv); |
| } |
| #endif |