99 lines
No EOL
3 KiB
C++
99 lines
No EOL
3 KiB
C++
/*
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* Benchmark class
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*
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* Copyright (C) 2016-2017 by Sascha Willems - www.saschawillems.de
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*
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* This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
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*/
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#include <vector>
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#include <string>
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#include <algorithm>
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#include <limits>
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#include <functional>
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#include <chrono>
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#include <iomanip>
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namespace vks
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{
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class Benchmark {
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private:
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FILE *stream;
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public:
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bool active = false;
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bool outputFrameTimes = false;
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uint32_t warmup = 1;
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uint32_t duration = 10;
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std::vector<double> frameTimes;
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std::string filename = "benchmarkresults.csv";
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double runtime = 0.0;
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uint32_t frameCount = 0;
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void run(std::function<void()> renderFunc) {
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active = true;
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#if defined(_WIN32)
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AttachConsole(ATTACH_PARENT_PROCESS);
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freopen_s(&stream, "CONOUT$", "w+", stdout);
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freopen_s(&stream, "CONOUT$", "w+", stderr);
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#endif
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std::cout << std::fixed << std::setprecision(3);
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// Warm up phase to get more stable frame rates
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{
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double tMeasured = 0.0;
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while (tMeasured < (warmup * 1000)) {
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auto tStart = std::chrono::high_resolution_clock::now();
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renderFunc();
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auto tDiff = std::chrono::duration<double, std::milli>(std::chrono::high_resolution_clock::now() - tStart).count();
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tMeasured += tDiff;
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};
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}
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// Benchmark phase
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{
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while (runtime < (duration * 1000.0)) {
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auto tStart = std::chrono::high_resolution_clock::now();
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renderFunc();
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auto tDiff = std::chrono::duration<double, std::milli>(std::chrono::high_resolution_clock::now() - tStart).count();
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runtime += tDiff;
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frameTimes.push_back(tDiff);
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frameCount++;
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};
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std::cout << "Benchmark finished" << std::endl;
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std::cout << "runtime: " << (runtime / 1000.0) << std::endl;
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std::cout << "frames: " << frameCount << std::endl;
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std::cout << "fps: " << frameCount / (runtime / 1000.0) << std::endl;
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}
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}
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void saveResults(std::string appinfo, std::string deviceinfo) {
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std::ofstream result(filename, std::ios::out);
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if (result.is_open()) {
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result << std::fixed << std::setprecision(4);
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result << "duration (ms),frames,fps" << std::endl;
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result << runtime << "," << frameCount << "," << frameCount / (runtime / 1000.0) << std::endl;
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if (outputFrameTimes) {
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result << std::endl << "frame,ms" << std::endl;
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for (size_t i = 0; i < frameTimes.size(); i++) {
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result << i << "," << frameTimes[i] << std::endl;
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}
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double tMin = *std::min_element(frameTimes.begin(), frameTimes.end());
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double tMax = *std::max_element(frameTimes.begin(), frameTimes.end());
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double tAvg = std::accumulate(frameTimes.begin(), frameTimes.end(), 0.0) / (double)frameTimes.size();
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std::cout << "best : " << (1000.0 / tMin) << " fps (" << tMin << " ms)" << std::endl;
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std::cout << "worst: " << (1000.0 / tMax) << " fps (" << tMax << " ms)" << std::endl;
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std::cout << "avg : " << (1000.0 / tAvg) << " fps (" << tAvg << " ms)" << std::endl;
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std::cout << std::endl;
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}
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result.flush();
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#if defined(_WIN32)
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FreeConsole();
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#endif
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}
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}
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};
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} |