I’m running into an issue where if I run the game in a standalone session and simply leave it at the opening scene, after a few minutes of waiting, I’ll start to see a periodic hitch every 4:30 seconds, like clockwork. No player action is required - just leave the game on the scene, and after a few minutes, the hitch will appear. CPU profiler indicates that the hitch is happening in InitViews::ViewVisibility::GetDynamicMeshElements - any suggestions on where I should go next to figure out what’s causing it?
Edit:
stat DUMPHITCHES output:
[2018.07.14-18.32.18:447][370]LogStats: ----------------------------------------
[2018.07.14-18.32.23:355][702]LogStats: ------------------Thread Hitch 3, Frame 114700 189.7ms ---------------
[2018.07.14-18.32.23:355][702]LogStats: ------------------ Game Thread 18.74ms
[2018.07.14-18.32.23:355][702]LogStats: 18.733ms ( 4) - Thread_1c3c0_0 - GameThread - STATGROUP_Threads - STATCAT_Advanced
[2018.07.14-18.32.23:355][702]LogStats: 18.716ms ( 2) - FrameTime - STAT_FrameTime - STATGROUP_Engine - STATCAT_Advanced
[2018.07.14-18.32.23:355][702]LogStats: 11.258ms ( 1) - GameEngine Tick - STAT_GameEngineTick - STATGROUP_Engine - STATCAT_Advanced
[2018.07.14-18.32.23:355][702]LogStats: 7.362ms ( 1) - World Tick Time - STAT_WorldTickTime - STATGROUP_Game - STATCAT_Advanced
[2018.07.14-18.32.23:355][702]LogStats: 7.027ms ( 5) - Tick Time - STAT_TickTime - STATGROUP_Game - STATCAT_Advanced
[2018.07.14-18.32.23:355][702]LogStats: 6.032ms ( 2) - TG_PrePhysics - STAT_TG_PrePhysics - STATGROUP_TickGroups - STATCAT_Advanced
[2018.07.14-18.32.23:355][702]LogStats: 5.934ms ( 2) - ReleaseTickGroup Block - STAT_ReleaseTickGroup_Block - STATGROUP_TickGroups - STATCAT_Advanced
[2018.07.14-18.32.23:355][702]LogStats: 5.872ms ( 1) - Game TaskGraph Tasks - STAT_TaskGraph_GameTasks - STATGROUP_Threading - STATCAT_Advanced
[2018.07.14-18.32.23:355][702]LogStats: 5.437ms ( 351) - FTickFunctionTask - STATGROUP_TaskGraphTasks - STATCAT_Advanced
[2018.07.14-18.32.23:355][702]LogStats: 1.827ms ( 446) - OtherChildren
[2018.07.14-18.32.23:355][702]LogStats: 1.478ms ( 8) - RotatingMovementComponent/Game/BFGame/Maps/InfiniteRunnerMaps/InfiniteRunner_TrackPrototype.InfiniteRunner_TrackPrototype.PersistentLevel.BP_MeshRingConstructor_Master_GEN_VARIABLE_BP_MeshRingConstructor_Master_C_CAT.RotatingMovement - STATGROUP_UObjects - STATCAT_Advanced
[2018.07.14-18.32.23:355][702]LogStats: 1.467ms ( 8) - MoveComponent(SceneComp) Time - STAT_MoveComponentSceneComponentTime - STATGROUP_Game - STATCAT_Advanced
[2018.07.14-18.32.23:355][702]LogStats: 1.467ms ( 32) - OtherChildren
[2018.07.14-18.32.23:355][702]LogStats: 0.011ms ( 16) - OtherChildren
[2018.07.14-18.32.23:355][702]LogStats: 1.091ms ( 240) - RotatingMovementComponent/Game/BFGame/Maps/InfiniteRunnerMaps/InfiniteRunner_TrackPrototype.InfiniteRunner_TrackPrototype.PersistentLevel.NODE_AddChildActorComponent-3_BP_Environment_DoublePyramid_C_CAT.RotatingMovement - STATGROUP_UObjects - STATCAT_Advanced
[2018.07.14-18.32.23:355][702]LogStats: 1.091ms ( 720) - OtherChildren
[2018.07.14-18.32.23:355][702]LogStats: 1.042ms ( 8) - BP_Background_MountainCity_C/Game/BFGame/Maps/InfiniteRunnerMaps/InfiniteRunner_TrackPrototype.InfiniteRunner_TrackPrototype.PersistentLevel.NODE_AddChildActorComponent-3_BP_Background_MountainCity_C_CAT - STATGROUP_UObjects - STATCAT_Advanced
[2018.07.14-18.32.23:355][702]LogStats: 1.013ms ( 8) - Function/Game/BFGame/Gameplay/InfiniteRunner/Environment/BP_Background_MountainCity.BP_Background_MountainCity_C.ReceiveTick - STATGROUP_UObjects - STATCAT_Advanced
[2018.07.14-18.32.23:356][702]LogStats: 1.011ms ( 8) - BP_Background_MountainCity_C/Game/BFGame/Maps/InfiniteRunnerMaps/InfiniteRunner_TrackPrototype.InfiniteRunner_TrackPrototype.PersistentLevel.NODE_AddChildActorComponent-3_BP_Background_MountainCity_C_CAT - STATGROUP_UObjects - STATCAT_Advanced
[2018.07.14-18.32.23:356][702]LogStats: 1.009ms ( 8) - Blueprint Time - STAT_BlueprintTime - STATGROUP_Game - STATCAT_Advanced
[2018.07.14-18.32.23:356][702]LogStats: 1.009ms ( 16) - OtherChildren
[2018.07.14-18.32.23:356][702]LogStats: 0.002ms ( 8) - OtherChildren
[2018.07.14-18.32.23:356][702]LogStats: 0.002ms ( 8) - OtherChildren
[2018.07.14-18.32.23:356][702]LogStats: 0.029ms ( 16) - OtherChildren
[2018.07.14-18.32.23:356][702]LogStats: 0.435ms ( 6) - OtherChildren
[2018.07.14-18.32.23:356][702]LogStats: 0.061ms ( 2) - OtherChildren
[2018.07.14-18.32.23:356][702]LogStats: 0.098ms ( 6) - OtherChildren
[2018.07.14-18.32.23:356][702]LogStats: 0.996ms ( 22) - OtherChildren
[2018.07.14-18.32.23:356][702]LogStats: 0.334ms ( 17) - OtherChildren
[2018.07.14-18.32.23:356][702]LogStats: 3.726ms ( 1) - RedrawViewports - STAT_RedrawViewports - STATGROUP_Engine - STATCAT_Advanced
[2018.07.14-18.32.23:356][702]LogStats: 2.879ms ( 1) - DrawStatsHUD - STAT_DrawStatsHUD - STATGROUP_StatSystem - STATCAT_Advanced
[2018.07.14-18.32.23:356][702]LogStats: 2.378ms ( 1) - RenderStats - STAT_RenderStats - STATGROUP_StatSystem - STATCAT_Advanced
[2018.07.14-18.32.23:356][702]LogStats: 1.286ms ( 106) - CanvasTextItem Time - STAT_Canvas_TextItemTime - STATGROUP_Canvas - STATCAT_Advanced
[2018.07.14-18.32.23:356][702]LogStats: 1.261ms ( 106) - Self
[2018.07.14-18.32.23:356][702]LogStats: 0.026ms ( 212) - OtherChildren
[2018.07.14-18.32.23:356][702]LogStats: 1.054ms ( 1) - Self
[2018.07.14-18.32.23:356][702]LogStats: 0.038ms ( 25) - OtherChildren
[2018.07.14-18.32.23:356][702]LogStats: 0.500ms ( 20) - OtherChildren
[2018.07.14-18.32.23:356][702]LogStats: 0.848ms ( 18) - OtherChildren
[2018.07.14-18.32.23:356][702]LogStats: 0.169ms ( 12) - OtherChildren
[2018.07.14-18.32.23:356][702]LogStats: 6.948ms ( 1) - Frame Sync Time - STAT_FrameSyncTime - STATGROUP_Engine - STATCAT_Advanced
[2018.07.14-18.32.23:356][702]LogStats: 6.923ms ( 1) - Game thread idle time - STAT_GameIdleTime - STATGROUP_Threading - STATCAT_Advanced
[2018.07.14-18.32.23:356][702]LogStats: 6.845ms ( 6) - CPU Stall - Wait For Event - STAT_EventWait - STATGROUP_CPUStalls - STATCAT_Advanced
[2018.07.14-18.32.23:356][702]LogStats: 0.079ms ( 19) - OtherChildren
[2018.07.14-18.32.23:356][702]LogStats: 0.024ms ( 4) - OtherChildren
[2018.07.14-18.32.23:357][702]LogStats: 0.511ms ( 23) - OtherChildren
[2018.07.14-18.32.23:357][702]LogStats: 0.017ms ( 2) - OtherChildren
[2018.07.14-18.32.23:357][702]LogStats: ------------------ Render Thread (//STATGROUP_Threads//RenderThread///Thread_1c6b4_0///####STATCAT_Advanced####) 189.66ms
[2018.07.14-18.32.23:357][702]LogStats: 189.370ms ( 448) - Thread_1c6b4_0 - RenderThread - STATGROUP_Threads - STATCAT_Advanced
[2018.07.14-18.32.23:357][702]LogStats: 177.143ms ( 16) - FPerInstanceRenderDataBufferUpdate - STATGROUP_RenderThreadCommands - STATCAT_Advanced
[2018.07.14-18.32.23:357][702]LogStats: 177.119ms ( 16) - STAT_FStaticMeshInstanceBuffer_InitRHI - STATGROUP_Quick - STATCAT_Advanced
[2018.07.14-18.32.23:357][702]LogStats: 0.024ms ( 16) - OtherChildren
[2018.07.14-18.32.23:357][702]LogStats: 4.735ms ( 1) - FDrawSceneCommand - STATGROUP_RenderThreadCommands - STATCAT_Advanced
[2018.07.14-18.32.23:357][702]LogStats: 4.536ms ( 1) - RenderViewFamily - STAT_TotalSceneRenderingTime - STATGROUP_SceneRendering - STATCAT_Advanced
[2018.07.14-18.32.23:357][702]LogStats: 1.677ms ( 1) - DeferredShadingSceneRenderer RenderFinish - STAT_FDeferredShadingSceneRenderer_RenderFinish - STATGROUP_SceneRendering - STATCAT_Advanced
[2018.07.14-18.32.23:357][702]LogStats: 1.670ms ( 1) - EndScene_Flush - STATGROUP_Quick - STATCAT_Advanced
[2018.07.14-18.32.23:357][702]LogStats: 1.668ms ( 1) - All Command List Execute - STAT_ImmedCmdListExecuteTime - STATGROUP_RHICMDLIST - STATCAT_Advanced
[2018.07.14-18.32.23:357][702]LogStats: 1.668ms ( 10) - OtherChildren
[2018.07.14-18.32.23:357][702]LogStats: 0.002ms ( 1) - OtherChildren
[2018.07.14-18.32.23:357][702]LogStats: 0.007ms ( 1) - OtherChildren
[2018.07.14-18.32.23:357][702]LogStats: 1.439ms ( 1) - InitViews - STAT_InitViewsTime - STATGROUP_SceneRendering - STATCAT_Advanced
[2018.07.14-18.32.23:357][702]LogStats: 1.208ms ( 1) - View Visibility - STAT_ViewVisibilityTime - STATGROUP_InitViews - STATCAT_Advanced
[2018.07.14-18.32.23:357][702]LogStats: 1.208ms ( 9) - OtherChildren
[2018.07.14-18.32.23:357][702]LogStats: 0.231ms ( 8) - OtherChildren
[2018.07.14-18.32.23:357][702]LogStats: 1.420ms ( 39) - OtherChildren
[2018.07.14-18.32.23:357][702]LogStats: 0.199ms ( 4) - OtherChildren
[2018.07.14-18.32.23:357][702]LogStats: 3.769ms ( 430) - OtherChildren
[2018.07.14-18.32.23:357][702]LogStats: 3.722ms ( 1) - CaptureCommand - STATGROUP_RenderThreadCommands - STATCAT_Advanced
[2018.07.14-18.32.23:357][702]LogStats: 3.721ms ( 1) - STAT_RenderPlanarReflection - STATGROUP_Quick - STATCAT_Advanced
[2018.07.14-18.32.23:357][702]LogStats: 2.262ms ( 35) - OtherChildren
[2018.07.14-18.32.23:357][702]LogStats: 1.459ms ( 1) - DeferredShadingSceneRenderer RenderFinish - STAT_FDeferredShadingSceneRenderer_RenderFinish - STATGROUP_SceneRendering - STATCAT_Advanced
[2018.07.14-18.32.23:357][702]LogStats: 1.453ms ( 1) - EndScene_Flush - STATGROUP_Quick - STATCAT_Advanced
[2018.07.14-18.32.23:357][702]LogStats: 1.451ms ( 1) - All Command List Execute - STAT_ImmedCmdListExecuteTime - STATGROUP_RHICMDLIST - STATCAT_Advanced
[2018.07.14-18.32.23:357][702]LogStats: 1.068ms ( 1) - BasePass - STAT_CLM_BasePass - STATGROUP_CommandListMarkers - STATCAT_Advanced
[2018.07.14-18.32.23:357][702]LogStats: 1.060ms ( 6) - Async Chain Execute - STAT_ChainExecute - STATGROUP_RHICMDLIST - STATCAT_Advanced
[2018.07.14-18.32.23:357][702]LogStats: 1.055ms ( 6) - Nonimmed. Command List Execute - STAT_NonImmedCmdListExecuteTime - STATGROUP_RHICMDLIST - STATCAT_Advanced
[2018.07.14-18.32.23:357][702]LogStats: 1.054ms ( 6) - Basepass - STAT_CLP_Basepass - STATGROUP_ParallelCommandListMarkers - STATCAT_Advanced
[2018.07.14-18.32.23:357][702]LogStats: 1.047ms ( 6) - BasePass - STAT_CLM_BasePass - STATGROUP_CommandListMarkers - STATCAT_Advanced
[2018.07.14-18.32.23:357][702]LogStats: 1.047ms ( 702) - OtherChildren
[2018.07.14-18.32.23:357][702]LogStats: 0.006ms ( 6) - OtherChildren
[2018.07.14-18.32.23:358][702]LogStats: 0.001ms ( 6) - OtherChildren
[2018.07.14-18.32.23:358][702]LogStats: 0.005ms ( 6) - OtherChildren
[2018.07.14-18.32.23:358][702]LogStats: 0.008ms ( 3) - OtherChildren
[2018.07.14-18.32.23:358][702]LogStats: 0.383ms ( 7) - OtherChildren
[2018.07.14-18.32.23:358][702]LogStats: 0.002ms ( 1) - OtherChildren
[2018.07.14-18.32.23:358][702]LogStats: 0.006ms ( 1) - OtherChildren
[2018.07.14-18.32.23:358][702]LogStats: 0.001ms ( 1) - OtherChildren
[2018.07.14-18.32.23:358][702]LogStats: ----------------------------------------
[2018.07.14-18.32.23:358][702]LogStats: Events history: Single frame 114700, greater than 1.0 ms
[2018.07.14-18.32.23:358][702]LogStats: Displaying events history for GameThread
[2018.07.14-18.32.23:358][702]LogStats: Displaying events history for RenderThread
[2018.07.14-18.32.23:358][702]LogStats: ----------------------------------------