From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Date: Tue, 24 Mar 2020 17:24:41 +0200 From: Andi Shyti Message-ID: <20200324152441.GD131880@jack.zhora.eu> References: <20200324125233.56308-1-chris@chris-wilson.co.uk> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200324125233.56308-1-chris@chris-wilson.co.uk> Subject: Re: [Intel-gfx] [PATCH i-g-t] i915/i915_pm_rc6_residency: Make ringbuffer rc6 fast List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Chris Wilson Cc: igt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org List-ID: 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 Reviewed-by: Andi Shyti Andi _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx