[Intel-gfx] [PATCH 7/7] drm/i915: Upclock on the first residency calculation

[Mika Kuoppala]

Chris Wilson <chris at chris-wilson.co.uk> writes:

> On Tue, Mar 14, 2017 at 03:17:29PM +0200, Mika Kuoppala wrote:
>> After ei reset, upclock as default if we don't have a previous
>> timestamp at hand. We might at sometimes waste one interval
>> of more power but also be more agile if we need to ramp up.
>
> Why? There is nothing special about the first EI interval - it doesn't
> correspond to GPU activity. We already start from rpe which is about 75%
> of max on that platform. At the first sign that we are underperforming
> we will overcompensate.

Then I have misunderstood the rampup and need to reread it. This patch
can be ignored.

-Mika

> -Chris
>
> -- 
> Chris Wilson, Intel Open Source Technology Centre