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Diffstat (limited to 'src/common/profiler.cpp')
| -rw-r--r-- | src/common/profiler.cpp | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/src/common/profiler.cpp b/src/common/profiler.cpp new file mode 100644 index 00000000..65c3df16 --- /dev/null +++ b/src/common/profiler.cpp @@ -0,0 +1,182 @@ +// Copyright 2015 Citra Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#include "common/profiler.h" +#include "common/profiler_reporting.h" +#include "common/assert.h" + +#if defined(_MSC_VER) && _MSC_VER <= 1800 // MSVC 2013. +#define NOMINMAX +#define WIN32_LEAN_AND_MEAN +#include <Windows.h> // For QueryPerformanceCounter/Frequency +#endif + +namespace Common { +namespace Profiling { + +#if ENABLE_PROFILING +thread_local Timer* Timer::current_timer = nullptr; +#endif + +#if defined(_MSC_VER) && _MSC_VER <= 1800 // MSVC 2013 +QPCClock::time_point QPCClock::now() { + static LARGE_INTEGER freq; + // Use this dummy local static to ensure this gets initialized once. + static BOOL dummy = QueryPerformanceFrequency(&freq); + + LARGE_INTEGER ticks; + QueryPerformanceCounter(&ticks); + + // This is prone to overflow when multiplying, which is why I'm using micro instead of nano. The + // correct way to approach this would be to just return ticks as a time_point and then subtract + // and do this conversion when creating a duration from two time_points, however, as far as I + // could tell the C++ requirements for these types are incompatible with this approach. + return time_point(duration(ticks.QuadPart * std::micro::den / freq.QuadPart)); +} +#endif + +TimingCategory::TimingCategory(const char* name, TimingCategory* parent) + : accumulated_duration(0) { + + ProfilingManager& manager = GetProfilingManager(); + category_id = manager.RegisterTimingCategory(this, name); + if (parent != nullptr) + manager.SetTimingCategoryParent(category_id, parent->category_id); +} + +ProfilingManager::ProfilingManager() + : last_frame_end(Clock::now()), this_frame_start(Clock::now()) { +} + +unsigned int ProfilingManager::RegisterTimingCategory(TimingCategory* category, const char* name) { + TimingCategoryInfo info; + info.category = category; + info.name = name; + info.parent = TimingCategoryInfo::NO_PARENT; + + unsigned int id = (unsigned int)timing_categories.size(); + timing_categories.push_back(std::move(info)); + + return id; +} + +void ProfilingManager::SetTimingCategoryParent(unsigned int category, unsigned int parent) { + ASSERT(category < timing_categories.size()); + ASSERT(parent < timing_categories.size()); + + timing_categories[category].parent = parent; +} + +void ProfilingManager::BeginFrame() { + this_frame_start = Clock::now(); +} + +void ProfilingManager::FinishFrame() { + Clock::time_point now = Clock::now(); + + results.interframe_time = now - last_frame_end; + results.frame_time = now - this_frame_start; + + results.time_per_category.resize(timing_categories.size()); + for (size_t i = 0; i < timing_categories.size(); ++i) { + results.time_per_category[i] = timing_categories[i].category->GetAccumulatedTime(); + } + + last_frame_end = now; +} + +TimingResultsAggregator::TimingResultsAggregator(size_t window_size) + : max_window_size(window_size), window_size(0) { + interframe_times.resize(window_size, Duration::zero()); + frame_times.resize(window_size, Duration::zero()); +} + +void TimingResultsAggregator::Clear() { + window_size = cursor = 0; +} + +void TimingResultsAggregator::SetNumberOfCategories(size_t n) { + size_t old_size = times_per_category.size(); + if (n == old_size) + return; + + times_per_category.resize(n); + + for (size_t i = old_size; i < n; ++i) { + times_per_category[i].resize(max_window_size, Duration::zero()); + } +} + +void TimingResultsAggregator::AddFrame(const ProfilingFrameResult& frame_result) { + SetNumberOfCategories(frame_result.time_per_category.size()); + + interframe_times[cursor] = frame_result.interframe_time; + frame_times[cursor] = frame_result.frame_time; + for (size_t i = 0; i < frame_result.time_per_category.size(); ++i) { + times_per_category[i][cursor] = frame_result.time_per_category[i]; + } + + ++cursor; + if (cursor == max_window_size) + cursor = 0; + if (window_size < max_window_size) + ++window_size; +} + +static AggregatedDuration AggregateField(const std::vector<Duration>& v, size_t len) { + AggregatedDuration result; + result.avg = Duration::zero(); + + result.min = result.max = (len == 0 ? Duration::zero() : v[0]); + + for (size_t i = 1; i < len; ++i) { + Duration value = v[i]; + result.avg += value; + result.min = std::min(result.min, value); + result.max = std::max(result.max, value); + } + if (len != 0) + result.avg /= len; + + return result; +} + +static float tof(Common::Profiling::Duration dur) { + using FloatMs = std::chrono::duration<float, std::chrono::milliseconds::period>; + return std::chrono::duration_cast<FloatMs>(dur).count(); +} + +AggregatedFrameResult TimingResultsAggregator::GetAggregatedResults() const { + AggregatedFrameResult result; + + result.interframe_time = AggregateField(interframe_times, window_size); + result.frame_time = AggregateField(frame_times, window_size); + + if (result.interframe_time.avg != Duration::zero()) { + result.fps = 1000.0f / tof(result.interframe_time.avg); + } else { + result.fps = 0.0f; + } + + result.time_per_category.resize(times_per_category.size()); + for (size_t i = 0; i < times_per_category.size(); ++i) { + result.time_per_category[i] = AggregateField(times_per_category[i], window_size); + } + + return result; +} + +ProfilingManager& GetProfilingManager() { + // Takes advantage of "magic" static initialization for race-free initialization. + static ProfilingManager manager; + return manager; +} + +SynchronizedRef<TimingResultsAggregator> GetTimingResultsAggregator() { + static SynchronizedWrapper<TimingResultsAggregator> aggregator(30); + return SynchronizedRef<TimingResultsAggregator>(aggregator); +} + +} // namespace Profiling +} // namespace Common |