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@ -4,8 +4,14 @@
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#include <algorithm>
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#include <chrono>
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#include <iterator>
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#include <mutex>
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#include <numeric>
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#include <sstream>
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#include <thread>
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#include <fmt/format.h>
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#include <fmt/time.h>
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#include "common/file_util.h"
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#include "common/math_util.h"
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#include "core/perf_stats.h"
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#include "core/settings.h"
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@ -15,8 +21,31 @@ using DoubleSecs = std::chrono::duration<double, std::chrono::seconds::period>;
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using std::chrono::duration_cast;
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using std::chrono::microseconds;
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// Purposefully ignore the first five frames, as there's a significant amount of overhead in
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// booting that we shouldn't account for
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constexpr std::size_t IgnoreFrames = 5;
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namespace Core {
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PerfStats::PerfStats(u64 title_id) : title_id(title_id) {}
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PerfStats::~PerfStats() {
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if (!Settings::values.record_frame_times || title_id == 0) {
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return;
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}
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std::time_t t = std::time(nullptr);
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std::ostringstream stream;
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std::copy(perf_history.begin() + IgnoreFrames, perf_history.begin() + current_index,
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std::ostream_iterator<double>(stream, "\n"));
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std::string path = FileUtil::GetUserPath(FileUtil::UserPath::LogDir);
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// %F Date format expanded is "%Y-%m-%d"
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std::string filename =
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fmt::format("{}/{:%F-%H-%M}_{:016X}.csv", path, *std::localtime(&t), title_id);
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FileUtil::IOFile file(filename, "w");
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file.WriteString(stream.str());
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}
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void PerfStats::BeginSystemFrame() {
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std::lock_guard lock{object_mutex};
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@ -27,7 +56,12 @@ void PerfStats::EndSystemFrame() {
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std::lock_guard lock{object_mutex};
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auto frame_end = Clock::now();
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accumulated_frametime += frame_end - frame_begin;
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const auto frame_time = frame_end - frame_begin;
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if (current_index < perf_history.size()) {
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perf_history[current_index++] =
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std::chrono::duration<double, std::milli>(frame_time).count();
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}
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accumulated_frametime += frame_time;
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system_frames += 1;
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previous_frame_length = frame_end - previous_frame_end;
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@ -40,6 +74,15 @@ void PerfStats::EndGameFrame() {
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game_frames += 1;
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}
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double PerfStats::GetMeanFrametime() {
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if (current_index <= IgnoreFrames) {
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return 0;
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}
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double sum = std::accumulate(perf_history.begin() + IgnoreFrames,
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perf_history.begin() + current_index, 0);
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return sum / (current_index - IgnoreFrames);
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}
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PerfStatsResults PerfStats::GetAndResetStats(microseconds current_system_time_us) {
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std::lock_guard lock{object_mutex};
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