From: Mika Kuoppala <mika.kuoppala@linux.intel.com>
To: Chris Wilson <chris@chris-wilson.co.uk>
Cc: intel-gfx@lists.freedesktop.org
Subject: Re: [PATCH 7/7] drm/i915: Upclock on the first residency calculation
Date: Tue, 14 Mar 2017 15:36:58 +0200 [thread overview]
Message-ID: <871su02d51.fsf@gaia.fi.intel.com> (raw)
In-Reply-To: <20170314133410.GH2118@nuc-i3427.alporthouse.com>
Chris Wilson <chris@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
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next prev parent reply other threads:[~2017-03-14 13:37 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-14 13:17 [PATCH 1/7] drm/i915: Move residency calculation into intel_pm.c Mika Kuoppala
2017-03-14 13:17 ` [PATCH 2/7] drm/i915: Return residency as microseconds Mika Kuoppala
2017-03-14 14:18 ` Chris Wilson
2017-03-14 13:17 ` [PATCH 3/7] drm/i915: Extend vlv/chv residency resolution Mika Kuoppala
2017-03-14 14:16 ` Chris Wilson
2017-03-14 13:17 ` [PATCH 4/7] drm/i915: Convert debugfs to use generic residency calculator Mika Kuoppala
2017-03-14 14:19 ` Chris Wilson
2017-03-14 13:17 ` [PATCH 5/7] drm/i915: Use cpu clock to calculate rc0 residency Mika Kuoppala
2017-03-14 13:30 ` Chris Wilson
2017-03-14 13:48 ` Ville Syrjälä
2017-03-14 13:17 ` [PATCH 6/7] drm/i915: Use coarse grained residency counter with byt Mika Kuoppala
2017-03-14 13:17 ` [PATCH 7/7] drm/i915: Upclock on the first residency calculation Mika Kuoppala
2017-03-14 13:34 ` Chris Wilson
2017-03-14 13:36 ` Mika Kuoppala [this message]
2017-03-14 18:46 ` ✗ Fi.CI.BAT: warning for series starting with [1/7] drm/i915: Move residency calculation into intel_pm.c Patchwork
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