gpu-next + vulkan under heavy system load leads to partially presented or out-of-order frames on amdgpu

[CounterPillow]

Important Information

Provide following Information:

• mpv version: mpv v0.37.0-663-g9cee44147a and libplacebo v7.349.0 (v6.338.0-120-g7b294350-dirty)
• Linux Distribution and Version: Arch Linux, x86_64, Linux 6.8.2-arch2-1
• Source of the mpv binary: mpv-build
• If known which version of mpv introduced the problem: N/A
• Window Manager and version: kwin_wayland 6.0.2
• GPU model, driver and version: AMD Radeon Vega 10 iGPU (Ryzen 7 Pro 3700U "Picasso"), Mesa 24.0.3, RADV
• Possible screenshot or video of visual glitches: https://overviewer.org/~pillow/up/0306cb4fe7/corruption_vulkan_gpu-next.mp4

Reproduction steps

Be on a Ryzen 7 Pro 3700U, have some CPU-heavy task running in the background making the whole SoC throttle to stay within its power envelope.

mpv --no-config --log-file=/tmp/mpvsucks-vulkanagain.log --gpu-api=vulkan --profile=high-quality --vo=gpu-next --hwdec=auto --ytdl-format='bestvideo[height<=1080]+bestaudio/best' https://www.youtube.com/watch?v=dpiYR1_CsiI

Glitches do not happen with OpenGL. Glitches do not happen with vo=dmabuf-wayland.

Glitches also occasionally occur without CPU heavy tasks in the background, probably due to something taking a little too long and ruining the timing.

Expected behavior

mpv drops the whole frame.

Actual behavior

mpv partially draws the frame, sometimes drawing a few frames in the future or past but only in parts, and is generally unpleasant to look at.

Log file

https://overviewer.org/~pillow/up/d916e5bf9c/mpvsucks-vulkanagain.log

Sample files

YouTube link in the repro command should suffice.

[CounterPillow]

And here's another logfile with both mpv and libplacebo updated to latest master and rebuilt without whatever weird shit keeps touching my git checkouts preventing the git pulls of ./rebuild from working: https://overviewer.org/~pillow/up/53b48aa64b/mpvsucks-vulkanupdated.log