[amdgpu] Compute kernels still run when the host process exit?

[Felix Kuehling]

Am 2021-04-01 um 2:22 p.m. schrieb Alex Deucher:
> On Thu, Apr 1, 2021 at 10:08 AM Smith John <ls.cat.kth at gmail.com> wrote:
>> Hi, when I killed an OpenCL host process, the kernels it launched were not terminated, and still run.
>>
>> My OpenCL runtime is AMDGPU-PRO 20.20. OS Ubuntu 18.04.5 with  Linux Kernel 5.4.53
>>
>> I was wondering if it was a bug or the driver did not implement this "watchdog" mechanism.
> In general, once you issue work on the GPU it has to run to
> completion.  It is not stopped if the application that issued it goes
> away.

If this is using KFD, we destroy user mode queues and free all the
process' memory at process termination. Because we support CWSR, we can
interrupt running shaders. Is this using the legacy OpenCL?

Regards,
  Felix


>
> Alex
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