VR de-risk spikes: simulated HMD, render-twice cost, queue-submit audit #1079

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opened 2026-10-25 20:31:37 +00:00 by sky_line · 0 comments

sky_line commented

2026-10-25 20:31:37 +00:00

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Hard rule (applies to every VR ticket): the non-VR path must not lose quality or FPS. All VR work is optional and only affects the VR path: no new per-frame work, memory, pipelines or device extensions when VR is off; each milestone is gated by a fixed-camera GPU/CPU timer A/B of VR-off against main before it lands.

OpenXR + vulkan_enable2 against Monado's simulated HMD on Linux (no headset needed). 2) Throwaway render-the-world-twice measurement on the 5090 and the 3060 to size the stereo cost. 3) Audit every thread that calls vkQueueSubmit / owns a queue (the runtime shares the graphics queue).

Part of #1072.

**Hard rule (applies to every VR ticket):** the non-VR path must not lose quality or FPS. All VR work is optional and only affects the VR path: no new per-frame work, memory, pipelines or device extensions when VR is off; each milestone is gated by a fixed-camera GPU/CPU timer A/B of VR-off against main before it lands. 1) OpenXR + vulkan_enable2 against Monado's simulated HMD on Linux (no headset needed). 2) Throwaway render-the-world-twice measurement on the 5090 and the 3060 to size the stereo cost. 3) Audit every thread that calls vkQueueSubmit / owns a queue (the runtime shares the graphics queue). Part of #1072.

sky_line added the

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2026-10-25 20:31:37 +00:00

sky_line added this to the Slipstream project

2026-10-25 20:31:37 +00:00

sky_line added a new dependency

2026-10-25 20:31:37 +00:00

#1072 [Epic] VR support (OpenXR) -- headline feature for 1.6

sky_line referenced this issue from a commit

2026-10-26 02:36:20 +00:00

#1073: LLXrSession -- OpenXR session, frame loop and test image on the Vulkan context