EA Motive has pointed out a potential bug they found related task graph synchronization and when compiling compute PSOs: [Link Removed]. From the screenshot they sent over, it seems that a task graph event is being inserted between the PSO compilation task and the RHI commandlist dispatch step, which causes the render thread to block until the task is completed. This can be fixed by modifying PipelineStateCache::GetAndOrCreateComputePipelineState to reflect the same behavior of PipelineStateCache::GetAndOrCreateGraphicsPipelineState
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This was an issue reported by a licensee and is therefore difficult to reproduce
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There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-247828 in the post.
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Component | UE - Rendering Architecture - RHI |
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Affects Versions | 5.5, 5.4.4 |
Target Fix | 5.5.4 |
Fix Commit | 39988718 |
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Created | Feb 13, 2025 |
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Resolved | Feb 14, 2025 |
Updated | Feb 20, 2025 |