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New GPU Profiler and RHI Submission Pipeline | Unreal Fest Stockholm 2025

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Luke Thatcher

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New GPU Profiler and RHI Submission Pipeline | Unreal Fest Stockholm 2025 is an Unreal Fest talk by Luke Thatcher of Epic's RHI team, published on the Unreal Engine YouTube channel.

The first half covers GPU profiler work in Unreal Engine 5.6: unified breadcrumb data for stat GPU, ProfileGPU, and Insights, plus multi-queue fences and bubbles. The second half explains the 5.5 RHI submission pipeline: parallel command-list recording, dispatch and translate chains, and GPU crash breadcrumb dumps.

It is for intermediate to advanced Unreal engineers who profile GPU work or debug RHI submission. Render-thread and multi-queue familiarity is assumed.

The recording is a free YouTube video of about 46 minutes from Unreal Fest Stockholm 2025.

It is useful when adopting the rebuilt 5.6 profiler or understanding how UE parallelizes RHI translation and crash context.