On 04/02/2019 12:28, Chris Wilson wrote:
Quoting Tvrtko Ursulin (2019-02-04 12:14:38)
On 04/02/2019 08:41, Chris Wilson wrote:
Expose whether or not we support the PMU software tracking in our
scheduler capabilities, so userspace can query at runtime.
I am leaning towards thinking PMU is a backend and not the scheduler
feature. We could export it via engine discovery for instance.
The sw metrics are buggy. They include semaphore time on top of busy,
but historically that has always been separate (and how it's measured by
the HW).
Time to resurrect the LRCA context runtime patches and see if that is
consistent in wait vs poll mode.
But, why are the semantics of busy time related to the question of
whether to expose this flag at engine or scheduler level?
Regards,
Tvrtko
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