How to debug hangs?

[godlikepanos]

Hi,

When running some of my demos I get the following on dmesg:

[drm:amdgpu_dm_atomic_commit_tail [amdgpu]] *ERROR* Waiting for fences timed out.
[drm:amdgpu_job_timedout [amdgpu]] *ERROR* ring gfx timeout, but soft recovered

Is there a way to find the cause of these hangs? Is there a way to debug them?

Thank you in advance.

PS: RADV has a feature where it dumps shader information related to the hangs.

[godlikepanos]

@JacobHeAMD I'm sorry for the poke.

The hangs I'm experiencing happen only on AMDVLK. RADV and nVidia don't have similar issues. Would it be easier to share a repro-case?

I thought of asking for a way to debug myself instead of asking you guys to waste time debugging.

[jinjianrong]

@godlikepanos we have some scripts to dump GPU hang status based on UMR, will try to get these open-sourced.

[godlikepanos]

That would be very helpful. Thank you!