[Intel-gfx] Reconfigurable OA queries

[Lionel Landwerlin]

On 09/10/2019 02:26, Chris Wilson wrote:
> Quoting Lionel Landwerlin (2019-10-09 00:14:41)
>> On 09/10/2019 00:40, Chris Wilson wrote:
>>> This is Lionel's work to enable OA for Vulkan, greatly bastardised on
>>> top of the struct_mutex removal. It claims to be doing the right
>>> thing...
>>> -Chris
>>>
>>>
>> Thanks a lot of picking this up.
>>
>> I'm aware of an issue with patch 9 as I can see requests with perf
>> queries being preempted. Looking into that, but not quite there yet.
> Outside of the masking issue where a later request on the same context
> will mask the nopreempt request, if that nopreempt flag is set on the
> last submitted request to ELSP[0], we will not allow that context to be
> preempted before we consider the request to be completed.


Oh... interesting!

>
>> I think there is a dependency issue with patch 8. We also use
>> cliprects_ptr for fences.
> Hmm, I was expecting the flag validation to be in the first patch to add
> extension parsing, but we are missing the test if both flags are set,
> reject the execbuf.
>
>> If we start reusing it for extended parameters, we need to make fences
>> the first extended param.
> Why?
> -Chris
>
How do we pass a reconfigure of OA together with an array of fences?


-Lionel