| 986 | } ovrPerfStats1; |
| 987 | |
| 988 | OVR_PUBLIC_FUNCTION(ovrResult) ovr_GetPerfStats(ovrSession session, ovrPerfStats* outStats) |
| 989 | { |
| 990 | REV_TRACE(ovr_GetPerfStats); |
| 991 | |
| 992 | if (session->UseHack(HACK_DISABLE_STATS)) |
| 993 | return ovrSuccess; |
| 994 | |
| 995 | ovrPerfStatsPerCompositorFrame FrameStats[ovrMaxProvidedFrameStats] = { 0 }; |
| 996 | |
| 997 | // TODO: Implement performance scale heuristics |
| 998 | float AdaptiveGpuPerformanceScale = 1.0f; |
| 999 | ovrBool AnyFrameStatsDropped = (session->FrameIndex - session->StatsIndex) > ovrMaxProvidedFrameStats; |
| 1000 | int FrameStatsCount = AnyFrameStatsDropped ? ovrMaxProvidedFrameStats : int(session->FrameIndex - session->StatsIndex); |
| 1001 | session->StatsIndex = session->FrameIndex; |
| 1002 | |
| 1003 | vr::Compositor_FrameTiming TimingStats[ovrMaxProvidedFrameStats]; |
| 1004 | TimingStats[0].m_nSize = sizeof(vr::Compositor_FrameTiming); |
| 1005 | FrameStatsCount = vr::VRCompositor()->GetFrameTimings(TimingStats, FrameStatsCount); |
| 1006 | |
| 1007 | vr::Compositor_CumulativeStats TotalStats; |
| 1008 | vr::VRCompositor()->GetCumulativeStats(&TotalStats, sizeof(vr::Compositor_CumulativeStats)); |
| 1009 | |
| 1010 | // Subtract the base stats so we get the cumulative stats since the last call to ovr_ResetPerfStats |
| 1011 | TotalStats.m_nNumFramePresents -= session->BaseStats.m_nNumFramePresents; |
| 1012 | TotalStats.m_nNumDroppedFrames -= session->BaseStats.m_nNumDroppedFrames; |
| 1013 | TotalStats.m_nNumReprojectedFrames -= session->BaseStats.m_nNumReprojectedFrames; |
| 1014 | TotalStats.m_nNumFramePresentsOnStartup -= session->BaseStats.m_nNumFramePresentsOnStartup; |
| 1015 | TotalStats.m_nNumDroppedFramesOnStartup -= session->BaseStats.m_nNumDroppedFramesOnStartup; |
| 1016 | TotalStats.m_nNumReprojectedFramesOnStartup -= session->BaseStats.m_nNumReprojectedFramesOnStartup; |
| 1017 | TotalStats.m_nNumLoading -= session->BaseStats.m_nNumLoading; |
| 1018 | TotalStats.m_nNumFramePresentsLoading -= session->BaseStats.m_nNumFramePresentsLoading; |
| 1019 | TotalStats.m_nNumDroppedFramesLoading -= session->BaseStats.m_nNumDroppedFramesLoading; |
| 1020 | TotalStats.m_nNumReprojectedFramesLoading -= session->BaseStats.m_nNumReprojectedFramesLoading; |
| 1021 | TotalStats.m_nNumTimedOut -= session->BaseStats.m_nNumTimedOut; |
| 1022 | TotalStats.m_nNumFramePresentsTimedOut -= session->BaseStats.m_nNumFramePresentsTimedOut; |
| 1023 | TotalStats.m_nNumDroppedFramesTimedOut -= session->BaseStats.m_nNumDroppedFramesTimedOut; |
| 1024 | TotalStats.m_nNumReprojectedFramesTimedOut -= session->BaseStats.m_nNumReprojectedFramesTimedOut; |
| 1025 | |
| 1026 | float fVsyncToPhotons = vr::VRSystem()->GetFloatTrackedDeviceProperty(vr::k_unTrackedDeviceIndex_Hmd, vr::Prop_SecondsFromVsyncToPhotons_Float); |
| 1027 | float fDisplayFrequency = vr::VRSystem()->GetFloatTrackedDeviceProperty(vr::k_unTrackedDeviceIndex_Hmd, vr::Prop_DisplayFrequency_Float); |
| 1028 | float fFrameDuration = 1.0f / fDisplayFrequency; |
| 1029 | for (int i = 0; i < FrameStatsCount; i++) |
| 1030 | { |
| 1031 | ovrPerfStatsPerCompositorFrame& stats = FrameStats[i]; |
| 1032 | |
| 1033 | stats.HmdVsyncIndex = TotalStats.m_nNumFramePresents; |
| 1034 | stats.AppFrameIndex = (int)session->FrameIndex; |
| 1035 | stats.AppDroppedFrameCount = TotalStats.m_nNumDroppedFrames + TotalStats.m_nNumReprojectedFrames; |
| 1036 | // TODO: Improve latency stats with sensor timestamps and latency markers |
| 1037 | stats.AppMotionToPhotonLatency = fFrameDuration + fVsyncToPhotons; |
| 1038 | stats.AppQueueAheadTime = VR_COMPOSITOR_ADDITIONAL_PREDICTED_FRAMES(TimingStats[i]) / fDisplayFrequency; |
| 1039 | stats.AppCpuElapsedTime = TimingStats[i].m_flClientFrameIntervalMs / 1000.0f; |
| 1040 | stats.AppGpuElapsedTime = TimingStats[i].m_flPreSubmitGpuMs / 1000.0f; |
| 1041 | |
| 1042 | stats.CompositorFrameIndex = TimingStats[i].m_nNumFramePresents; |
| 1043 | stats.CompositorDroppedFrameCount = 0; |
| 1044 | stats.CompositorLatency = fVsyncToPhotons; |
| 1045 | stats.CompositorCpuElapsedTime = TimingStats[i].m_flCompositorRenderCpuMs / 1000.0f; |