[Intel-xe] [PATCH v2 2/2] drm/xe/pmu: Enable PMU interface

[Iddamsetty, Aravind]

On 09-07-2023 06:02, Dixit, Ashutosh wrote:
> On Thu, 06 Jul 2023 20:53:47 -0700, Iddamsetty, Aravind wrote:
>> On 07-07-2023 07:48, Dixit, Ashutosh wrote:
>>> On Thu, 06 Jul 2023 06:42:29 -0700, Iddamsetty, Aravind wrote:
>>> Also, could you please explain where the requirement to expose these OAG
>>> group busy/free registers via the PMU is coming from? Since these are OA
>>> registers presumably they can be collected using the OA subsystem.
>>
>> L0 sysman needs this
>> https://spec.oneapi.io/level-zero/latest/sysman/api.html#zes-engine-properties-t
>> and xpumanager uses this
>> https://github.com/intel/xpumanager/blob/master/core/src/device/gpu/gpu_device.cpp
> 
> Also there is the above mentioned open regarding this: "Since these are OA
> registers presumably they can be collected using the OA subsystem". L0 now
> seems to be supporting OA and we are going to provide an OA subsystem for
> xe. This probably also needs arch input.

While I try to check on this, by any chance do you know why we have to
go with custom OA subsystem implementation and cannot use PMU for
reporting OA.

Thanks,
Aravind.