diff options
Diffstat (limited to 'indra/newview/llviewerstats.cpp')
| -rw-r--r-- | indra/newview/llviewerstats.cpp | 106 |
1 files changed, 104 insertions, 2 deletions
diff --git a/indra/newview/llviewerstats.cpp b/indra/newview/llviewerstats.cpp index ad503cbac7..cf0cf2a6a9 100644 --- a/indra/newview/llviewerstats.cpp +++ b/indra/newview/llviewerstats.cpp @@ -220,7 +220,20 @@ SimMeasurement<F64Megabytes > SIM_PHYSICS_MEM("physicsmemoryallocated", "", LL LLTrace::SampleStatHandle<F64Milliseconds > FRAMETIME_JITTER("frametimejitter", "Average delta between successive frame times"), FRAMETIME("frametime", "Measured frame time"), - SIM_PING("simpingstat"); + SIM_PING("simpingstat"), + FRAMETIME_JITTER_99TH("frametimejitter99", "99th percentile of frametime jitter over the last 5 seconds."), + FRAMETIME_JITTER_95TH("frametimejitter95", "99th percentile of frametime jitter over the last 5 seconds."), + FRAMETIME_99TH("frametime99", "99th percentile of frametime over the last 5 seconds."), + FRAMETIME_95TH("frametime95", "99th percentile of frametime over the last 5 seconds."), + FRAMETIME_JITTER_CUMULATIVE("frametimejitcumulative", "Cumulative frametime jitter over the session."), + FRAMETIME_JITTER_STDDEV("frametimejitterstddev", "Standard deviation of frametime jitter in a 5 second period."), + FRAMETIME_STDDEV("frametimestddev", "Standard deviation of frametime in a 5 second period."); + +LLTrace::SampleStatHandle<U32> FRAMETIME_JITTER_EVENTS("frametimeevents", "Number of frametime events in the session. Applies when jitter exceeds 10% of the previous frame."), + FRAMETIME_JITTER_EVENTS_PER_MINUTE("frametimeeventspm", "Average number of frametime events per minute."), + FRAMETIME_JITTER_EVENTS_LAST_MINUTE("frametimeeventslastmin", "Number of frametime events in the last minute."); + +LLTrace::SampleStatHandle<F64> NOTRMALIZED_FRAMETIME_JITTER_SESSION("normalizedframetimejitter", "Normalized frametime jitter over the session."); LLTrace::EventStatHandle<LLUnit<F64, LLUnits::Meters> > AGENT_POSITION_SNAP("agentpositionsnap", "agent position corrections"); @@ -264,16 +277,105 @@ void LLViewerStats::resetStats() getRecording().reset(); } +// Helper for calculating Nth percentile with linear interpolation +template<typename T> +T calcPercentile(const std::vector<T>& sorted, double percent) +{ + if (sorted.empty()) + return T(0); + double idx = percent * (sorted.size() - 1); + size_t idx_below = static_cast<size_t>(std::floor(idx)); + size_t idx_above = static_cast<size_t>(std::ceil(idx)); + if (idx_below == idx_above) + return sorted[idx_below]; + double weight_above = idx - idx_below; + return sorted[idx_below] * (1.0 - weight_above) + sorted[idx_above] * weight_above; +} + +template<typename T> +T calcStddev(const std::vector<T>& values) +{ + if (values.size() < 2) + return T(0); + double sum = 0, sq_sum = 0; + for (const auto& v : values) + { + double d = v.value(); + sum += d; + sq_sum += d * d; + } + double mean = sum / values.size(); + double variance = (sq_sum / values.size()) - (mean * mean); + return T(std::sqrt(variance)); +} + void LLViewerStats::updateFrameStats(const F64Seconds time_diff) { if (gFrameCount && mLastTimeDiff > (F64Seconds)0.0) { + mTotalTime += time_diff; sample(LLStatViewer::FRAMETIME, time_diff); // old stats that were never really used F64Seconds jit = (F64Seconds)std::fabs((mLastTimeDiff - time_diff)); sample(LLStatViewer::FRAMETIME_JITTER, jit); - } + mTotalFrametimeJitter += jit; + sample(LLStatViewer::FRAMETIME_JITTER_CUMULATIVE, mTotalFrametimeJitter); + sample(LLStatViewer::NOTRMALIZED_FRAMETIME_JITTER_SESSION, mTotalFrametimeJitter / mTotalTime); + + static LLCachedControl<F32> frameTimeEventThreshold(gSavedSettings, "StatsFrametimeEventThreshold", 0.1f); + + if (time_diff - mLastTimeDiff > mLastTimeDiff * frameTimeEventThreshold()) + { + sample(LLStatViewer::FRAMETIME_JITTER_EVENTS, mFrameJitterEvents++); + mFrameJitterEventsLastMinute++; + } + mFrameTimes.push_back(time_diff); + mFrameTimesJitter.push_back(jit); + + mLastFrameTimeSample += time_diff; + mTimeSinceLastEventSample += time_diff; + + static LLCachedControl<S32> frameTimeSampleSeconds(gSavedSettings, "StatsFrametimeSampleSeconds", 5); + + if (mLastFrameTimeSample >= frameTimeSampleSeconds()) + { + std::sort(mFrameTimes.begin(), mFrameTimes.end()); + std::sort(mFrameTimesJitter.begin(), mFrameTimesJitter.end()); + + // Use new helpers for calculations + F64Seconds frame_time_stddev = calcStddev(mFrameTimes); + sample(LLStatViewer::FRAMETIME_STDDEV, frame_time_stddev); + + F64Seconds ninety_ninth_percentile = calcPercentile(mFrameTimes, 0.99); + F64Seconds ninety_fifth_percentile = calcPercentile(mFrameTimes, 0.95); + sample(LLStatViewer::FRAMETIME_99TH, ninety_ninth_percentile); + sample(LLStatViewer::FRAMETIME_95TH, ninety_fifth_percentile); + + frame_time_stddev = calcStddev(mFrameTimesJitter); + sample(LLStatViewer::FRAMETIME_JITTER_STDDEV, frame_time_stddev); + + ninety_ninth_percentile = calcPercentile(mFrameTimesJitter, 0.99); + ninety_fifth_percentile = calcPercentile(mFrameTimesJitter, 0.95); + sample(LLStatViewer::FRAMETIME_JITTER_99TH, ninety_ninth_percentile); + sample(LLStatViewer::FRAMETIME_JITTER_95TH, ninety_fifth_percentile); + + mFrameTimes.clear(); + mFrameTimesJitter.clear(); + mLastFrameTimeSample = F64Seconds(0); + } + + if (mTimeSinceLastEventSample >= 60) + { + mEventMinutes++; + // Calculate average events per minute + U64 frame_time_events_per_minute = (U64)mFrameJitterEvents / mEventMinutes; + sample(LLStatViewer::FRAMETIME_JITTER_EVENTS_PER_MINUTE, frame_time_events_per_minute); + sample(LLStatViewer::FRAMETIME_JITTER_EVENTS_LAST_MINUTE, mFrameJitterEventsLastMinute); + mFrameJitterEventsLastMinute = 0; + mTimeSinceLastEventSample = F64Seconds(0); + } + } mLastTimeDiff = time_diff; } |