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Merge pull request #6317 from ameerj/fps-fix

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perf_stats: Rework FPS counter to be more accurate
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bunnei 2021-05-18 19:56:29 -07:00 • committed by GitHub
commit 7d86a6ff02
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10 changed files with 26 additions and 14 deletions
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12
src/core/perf_stats.cpp
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@ -69,9 +69,7 @@ void PerfStats::EndSystemFrame() {
}
void PerfStats::EndGameFrame() {
std::lock_guard lock{object_mutex};
game_frames += 1;
game_frames.fetch_add(1, std::memory_order_relaxed);
}
double PerfStats::GetMeanFrametime() const {
@ -94,10 +92,11 @@ PerfStatsResults PerfStats::GetAndResetStats(microseconds current_system_time_us
const auto interval = duration_cast<DoubleSecs>(now - reset_point).count();
const auto system_us_per_second = (current_system_time_us - reset_point_system_us) / interval;
const auto current_frames = static_cast<double>(game_frames.load(std::memory_order_relaxed));
const auto current_fps = current_frames / interval;
const PerfStatsResults results{
.system_fps = static_cast<double>(system_frames) / interval,
.game_fps = static_cast<double>(game_frames) / interval,
.average_game_fps = (current_fps + previous_fps) / 2.0,
.frametime = duration_cast<DoubleSecs>(accumulated_frametime).count() /
static_cast<double>(system_frames),
.emulation_speed = system_us_per_second.count() / 1'000'000.0,
@ -108,7 +107,8 @@ PerfStatsResults PerfStats::GetAndResetStats(microseconds current_system_time_us
reset_point_system_us = current_system_time_us;
accumulated_frametime = Clock::duration::zero();
system_frames = 0;
game_frames = 0;
game_frames.store(0, std::memory_order_relaxed);
previous_fps = current_fps;
return results;
}