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111 lines
3.4 KiB
111 lines
3.4 KiB
/* |
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Copyright © 2010, 2011, 2012 Vladimír Vondruš <mosra@centrum.cz> |
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This file is part of Magnum. |
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Magnum is free software: you can redistribute it and/or modify |
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it under the terms of the GNU Lesser General Public License version 3 |
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only, as published by the Free Software Foundation. |
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Magnum is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU Lesser General Public License version 3 for more details. |
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*/ |
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#include "Profiler.h" |
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#include <algorithm> |
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#include <numeric> |
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#include <Utility/Assert.h> |
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#include "Magnum.h" |
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namespace Magnum { |
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Profiler::Section Profiler::addSection(const std::string& name) { |
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CORRADE_ASSERT(!enabled, "Profiler: cannot add section when profiling is enabled", 0); |
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sections.push_back(name); |
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return sections.size()-1; |
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} |
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void Profiler::setMeasureDuration(std::size_t frames) { |
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CORRADE_ASSERT(!enabled, "Profiler: cannot set measure duration when profiling is enabled", ); |
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measureDuration = frames; |
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} |
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void Profiler::enable() { |
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enabled = true; |
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frameData.assign(measureDuration*sections.size(), std::chrono::high_resolution_clock::duration::zero()); |
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totalData.assign(sections.size(), std::chrono::high_resolution_clock::duration::zero()); |
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frameCount = 0; |
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} |
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void Profiler::disable() { |
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enabled = false; |
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} |
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void Profiler::start(Section section) { |
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if(!enabled) return; |
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CORRADE_ASSERT(section < sections.size(), "Profiler: unknown section passed to start()", ); |
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save(); |
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currentSection = section; |
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} |
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void Profiler::stop() { |
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if(!enabled) return; |
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save(); |
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previousTime = std::chrono::high_resolution_clock::time_point(); |
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} |
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void Profiler::save() { |
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auto now = std::chrono::high_resolution_clock::now(); |
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/* If the profiler is already running, add time to given section */ |
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if(previousTime != std::chrono::high_resolution_clock::time_point()) |
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frameData[currentFrame*sections.size()+currentSection] += now-previousTime; |
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/* Set current time as previous for next section */ |
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previousTime = now; |
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} |
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void Profiler::nextFrame() { |
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if(!enabled) return; |
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/* Next frame index */ |
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std::size_t nextFrame = (currentFrame+1) % measureDuration; |
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/* Add times of current frame to total */ |
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for(std::size_t i = 0; i != sections.size(); ++i) |
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totalData[i] += frameData[currentFrame*sections.size()+i]; |
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/* Subtract times of next frame from total and erase them */ |
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for(std::size_t i = 0; i != sections.size(); ++i) { |
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totalData[i] -= frameData[nextFrame*sections.size()+i]; |
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frameData[nextFrame*sections.size()+i] = std::chrono::high_resolution_clock::duration::zero(); |
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} |
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/* Advance to next frame */ |
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currentFrame = nextFrame; |
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if(frameCount < measureDuration) ++frameCount; |
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} |
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void Profiler::printStatistics() { |
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if(!enabled) return; |
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std::vector<std::size_t> totalSorted(sections.size()); |
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std::iota(totalSorted.begin(), totalSorted.end(), 0); |
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std::sort(totalSorted.begin(), totalSorted.end(), [this](std::size_t i, std::size_t j){return totalData[i] > totalData[j];}); |
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Debug() << "Statistics for last" << measureDuration << "frames:"; |
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for(std::size_t i = 0; i != sections.size(); ++i) |
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Debug() << ' ' << sections[totalSorted[i]] << std::chrono::microseconds(totalData[totalSorted[i]]).count()/frameCount << u8"µs"; |
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} |
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}
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