From: Jesse Barnes <jbarnes@virtuousgeek.org>
To: Chris Wilson <chris@chris-wilson.co.uk>,
intel-gfx@lists.freedesktop.org, "Wang,
Wendy" <wendy.wang@intel.com>
Subject: Re: [PATCH 1/7] drm/i915: Relax RPS contraints to allows setting minfreq on idle
Date: Mon, 09 Mar 2015 08:38:06 -0700 [thread overview]
Message-ID: <54FDBE5E.1040803@virtuousgeek.org> (raw)
In-Reply-To: <1425654391-2126-1-git-send-email-chris@chris-wilson.co.uk>
On 03/06/2015 07:06 AM, Chris Wilson wrote:
> When we idle, we set the GPU frequency to the hardware minimum (not user
> minimum). We introduce a new variable to distinguish between the
> different roles, and to allow easy tuning of the idle frequency without
> impacting over aspects of RPS. Setting the minimum frequency should be a
> safety blanket as the pcu on the GPU should be power gating itself
> anyway. However, in order for us to do set the absolute minimum
> frequency, we need to relax a few of our assertions that we do not
> exceed the user limits.
>
> v2: Add idle_freq
>
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Arg, we still need some way of getting numbers (both perf and power) for
these kinds of changes across a variety of workloads.
Wendy, is that something you can do manually? Comparing BYT with and
without these patches across your power/perf tests?
Thanks,
Jesse
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next prev parent reply other threads:[~2015-03-09 15:37 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-06 15:06 [PATCH 1/7] drm/i915: Relax RPS contraints to allows setting minfreq on idle Chris Wilson
2015-03-06 15:06 ` [PATCH 2/7] drm/i915: Fix computation of last_adjustment for RPS autotuning Chris Wilson
2015-03-06 17:32 ` Daniel Vetter
2015-03-06 21:44 ` Chris Wilson
2015-03-18 6:56 ` Deepak S
2015-03-18 9:05 ` Chris Wilson
2015-03-18 9:20 ` Chris Wilson
2015-03-18 11:09 ` Deepak S
2015-03-06 15:06 ` [PATCH 3/7] drm/i915: Improved w/a for rps on Baytrail Chris Wilson
2015-03-18 7:56 ` Deepak S
2015-03-06 15:06 ` [PATCH 4/7] drm/i915: Use down ei for manual Baytrail RPS calculations Chris Wilson
2015-03-18 8:04 ` Deepak S
2015-03-06 15:06 ` [PATCH 5/7] drm/i915: Agressive downclocking on Baytrail Chris Wilson
2015-03-18 8:12 ` Deepak S
2015-03-18 9:48 ` Daniel Vetter
2015-03-18 9:49 ` Chris Wilson
2015-03-18 11:06 ` Deepak S
2015-03-06 15:06 ` [PATCH 6/7] drm/i915: Boost GPU frequency if we detect outstanding pageflips Chris Wilson
2015-03-18 8:18 ` Deepak S
2015-03-18 8:20 ` Deepak S
2015-03-06 15:06 ` [PATCH 7/7] drm/i915: Deminish contribution of wait-boosting from clients Chris Wilson
2015-03-06 17:58 ` shuang.he
2015-03-18 9:00 ` Deepak S
2015-03-09 15:38 ` Jesse Barnes [this message]
2015-03-18 5:44 ` [PATCH 1/7] drm/i915: Relax RPS contraints to allows setting minfreq on idle Deepak S
2015-03-18 9:07 ` Chris Wilson
2015-03-18 5:52 ` Deepak S
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