luke thatcher 67c1b93a5e Fix RT / RHIT stats ...

- The RHI and render threads are now blocking on FGraphEvents in various platform RHI implementations, but the timing stats did not take this time into account.
 - Some time was double counted (e.g. on the render thread, due to a FRenderThreadIdleScope plus a nested call to FEvent::Wait which includes a per-thread wait stat).

 - The fix is to remove use of GRenderThreadIdle / FRenderThreadIdleScope etc in places where the thread is going to wait on an FGraphEvent, to avoid the double counting. This fixes the odd spikes on the RHIT in CSV profiles.
 - Also removed the GWorkingRHIThreadStallTime global. RHI idle time is now tracked using standard thread stats (FThreadIdleStats::FScopeIdle, which is included in the FRenderThreadIdleScope when called from the RHI thread).

 - Simplified copy/paste instances of GRenderThreadIdle and GRenderThreadNumIdle by replacing them with a FRenderThreadIdleScope across platform RHIs.

After this change, the RT and RHIT unit stats are stable in Lyra game, when clicking away from the window to force the title into a low framerate mode. Before this change, the RT/RHIT stats would change significantly.

#rb Ben.Woodhouse
#preflight 636ad7c3450be1d9f849a34f

[CL 23069592 by luke thatcher in ue5-main branch]

2022-11-09 20:58:40 -05:00

..

Private

Fix RT / RHIT stats

2022-11-09 20:58:40 -05:00

Public/Interfaces

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SlateRHIRenderer.Build.cs

Cleaned up build.cs files by removing any include paths that were already being added by UBT. This was done to help identify how include paths are being added and to help with future refactoring.

2022-09-08 21:44:02 -04:00