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

[Christian König]

Am 01.04.21 um 20:22 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.

Well that is not 100% correct.

When the job has already been pushed to the hardware it indeed runs till 
the end.

But when the job is still in the scheduler and the process which has 
submitted it is killed we also throw away the job.

This obviously only counts for the classic stack and not for the KFD.

Christian.

>
> Alex
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