From: Andi Shyti <andi@etezian.org>
To: Chris Wilson <chris@chris-wilson.co.uk>
Cc: igt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org
Subject: Re: [Intel-gfx] [PATCH i-g-t] i915/i915_pm_rc6_residency: Make ringbuffer rc6 fast
Date: Tue, 24 Mar 2020 17:24:41 +0200 [thread overview]
Message-ID: <20200324152441.GD131880@jack.zhora.eu> (raw)
In-Reply-To: <20200324125233.56308-1-chris@chris-wilson.co.uk>
Hi Chris,
On Tue, Mar 24, 2020 at 12:52:33PM +0000, Chris Wilson wrote:
> The legacy ringbuffer submission lacks a fast soft-rc6
> mechanism as we have no interrupt for an idle ring. As such
> we are at the mercy of HW RC6... which is not quite as
> precise as we need to pass this test. Oh well.
>
> Since HW is not fast enough to minimise power draw, tell the driver to
> park as soon as we know we are idle. One day, we hope for the driver to
> discover a mechanism to do this for itself, for as this test shows that
> can save us Watts!
>
> Closes: https://gitlab.freedesktop.org/drm/intel/issues/1516
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Andi Shyti <andi.shyti@intel.com>
Andi
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prev parent reply other threads:[~2020-03-24 15:24 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-24 12:52 [igt-dev] [PATCH i-g-t] i915/i915_pm_rc6_residency: Make ringbuffer rc6 fast Chris Wilson
2020-03-24 13:45 ` [igt-dev] ✓ Fi.CI.BAT: success for " Patchwork
2020-03-24 14:54 ` [igt-dev] ✓ Fi.CI.IGT: " Patchwork
2020-03-24 15:24 ` Andi Shyti [this message]
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