Parked for later milestones
Issues found while building, with the milestone that owns them.
M7
- vkcube shows a black window for about half a second at startup since early import, first-buffer holds and explicit sync landed. A spans log of a launch tells which.
- Every 1024th queue submit on NVIDIA stalls for 2.5 to 15 ms, one dropped frame every 6.2 s at 165 Hz. See research/nvidia.md.
- First-time dmabuf imports (15 to 27 ms each on NVIDIA) and direct scanout setup on fullscreen still land on the main thread and cost about ten frames per transition.