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Add perf stat logging through ini setting

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For better tracking of performance regressions on incoming changes, this
change adds a way to dump frametime to file by changing an ini config
option. This is intentionally hidden as its only useful to a small
number of individuals, and not really applicable to the general
userbase.
This commit is contained in:
James Rowe 2019-08-12 22:15:00 -06:00
parent 84b40f2da6
commit 62e6c147ae
11 changed files with 78 additions and 11 deletions
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38
src/core/perf_stats.cpp
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@ -4,8 +4,12 @@
#include <algorithm>
#include <chrono>
#include <iterator>
#include <mutex>
#include <numeric>
#include <thread>
#include <fmt/format.h>
#include "common/file_util.h"
#include "core/hw/gpu.h"
#include "core/perf_stats.h"
#include "core/settings.h"
@ -15,8 +19,26 @@ using DoubleSecs = std::chrono::duration<double, std::chrono::seconds::period>;
using std::chrono::duration_cast;
using std::chrono::microseconds;
// Purposefully ignore the first five frames, as there's a significant amount of overhead in
// booting that we shouldn't account for
constexpr size_t IGNORE_FRAMES = 5;
namespace Core {
PerfStats::PerfStats(u64 title_id) : title_id(title_id) {}
PerfStats::~PerfStats() {
if (Settings::values.record_frame_times && title_id != 0) {
std::ostringstream stream;
std::copy(perf_history.begin() + IGNORE_FRAMES, perf_history.begin() + current_index,
std::ostream_iterator<double>(stream, "\n"));
std::string path = FileUtil::GetUserPath(FileUtil::UserPath::LogDir);
std::string filename = fmt::format("{}/{:X}.csv", path, title_id);
FileUtil::IOFile file(filename, "w");
file.WriteString(stream.str());
}
}
void PerfStats::BeginSystemFrame() {
std::lock_guard lock{object_mutex};
@ -27,7 +49,12 @@ void PerfStats::EndSystemFrame() {
std::lock_guard lock{object_mutex};
auto frame_end = Clock::now();
accumulated_frametime += frame_end - frame_begin;
const auto frame_time = frame_end - frame_begin;
if (current_index < perf_history.size()) {
perf_history[current_index++] =
std::chrono::duration<double, std::milli>(frame_time).count();
}
accumulated_frametime += frame_time;
system_frames += 1;
previous_frame_length = frame_end - previous_frame_end;
@ -40,6 +67,15 @@ void PerfStats::EndGameFrame() {
game_frames += 1;
}
double PerfStats::GetMeanFrametime() {
if (current_index < 2) {
return 0;
}
double sum = std::accumulate(perf_history.begin() + IGNORE_FRAMES,
perf_history.begin() + current_index, 0);
return sum / (current_index - 1 - IGNORE_FRAMES);
}
PerfStats::Results PerfStats::GetAndResetStats(microseconds current_system_time_us) {
std::lock_guard lock(object_mutex);