When executing "ShowFlag.Rendering 0", it occur the memory leak because it can't run RHICmdList.ImmediateFlush().
The following code is a workaround. DEC_MEMORY_STAT_BY() is ImmediateFlush. Without this code, only INC_MEMORY_STAT_BY() is executed.
void FDeferredShadingSceneRenderer::Render(FRHICommandListImmediate& RHICmdList)
{
...
if (!ViewFamily.EngineShowFlags.Rendering)
{
+ if (GRHINeedsExtraDeletionLatency || !GRHICommandList.Bypass())
+ {
+ RHICmdList.ImmediateFlush(EImmediateFlushType::FlushRHIThreadFlushResources);
+ }
return;
}
...
}
void FMobileSceneRenderer::Render(FRHICommandListImmediate& RHICmdList)
{
...
if(!ViewFamily.EngineShowFlags.Rendering)
{
+ if (GRHINeedsExtraDeletionLatency || !GRHICommandList.Bypass())
+ {
+ RHICmdList.ImmediateFlush(EImmediateFlushType::FlushRHIThreadFlushResources);
+ }
return;
}
...
}
1. Launch standalone game with "-d3d12" argument from editor
2. Exec "ShowFlag.Rendering 0"
3. Exec "Stat MemoryPlatform"
Then, it can see increasing Used Physical memory.
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There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-79676 in the post.
| 1 |
| Component | UE - Graphics Features |
|---|---|
| Affects Versions | 4.21, 4.22 |
| Created | Sep 2, 2019 |
|---|---|
| Resolved | Aug 27, 2021 |
| Updated | Aug 27, 2021 |