An inconvenient part of GPU driver development is the fact that GPUs can crash and hang for various reasons, just like CPUs. Really, this can happen on any operating system to GPUs from any manufacturer. We’ve seen many such issues on the open source Linux driver stack for AMD GPUs. We’ve been tackling many bugs that lead to GPU hangs. We need to deal with the fact that hangs can happen and when they happen, we need to make sure that the system can recover and the user can keep using their Linux desktop. The purpose of this blog post is to give an overview of what the problem is and what steps we are taking to improve it.
  • tal@lemmy.todayEnglish
    4·
    12 hours ago

    Enforcing isolation means that we try to reduce how much an application using the GPU can affect another, effectively disabling parallel execution from different contexts. This greatly limits the scope of what jobs are potentially affected when there is a crash or hang, so makes it less likely that a “guilty” context can crash others.

    There is a kernel parameter amdgpu.enforce_isolation which will additionally isolate different contexts that are running on different queues. This is currently disabled by default for performance reasons, you can enable it for better stability.

    Oh, cool. I had not seen that.

  • goatinspace@feddit.orgEnglish
    1·
    10 hours ago

    If your AMD system is freezing randomly it can be resolved by adding “amdgpu.dcdebugmask=0x12” to grub.