From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Vetter Subject: Re: [PATCH] drm/i915: Increase the RC6p threshold. Date: Tue, 5 Mar 2013 10:02:41 +0100 Message-ID: <20130305090240.GF9021@phenom.ffwll.local> References: <1359517319-30687-1-git-send-email-marcheu@chromium.org> <20130219161550.22d00061@jbarnes-desktop> <20130221084947.179f8867@jbarnes-desktop> <20130225081332.499c8609@jbarnes-desktop> <20130227082356.5b95482f@jbarnes-desktop> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Return-path: Received: from mail-wg0-f42.google.com (mail-wg0-f42.google.com [74.125.82.42]) by gabe.freedesktop.org (Postfix) with ESMTP id 10B3CE5C21 for ; Tue, 5 Mar 2013 01:00:08 -0800 (PST) Received: by mail-wg0-f42.google.com with SMTP id 12so2589273wgh.3 for ; Tue, 05 Mar 2013 01:00:08 -0800 (PST) Content-Disposition: inline In-Reply-To: <20130227082356.5b95482f@jbarnes-desktop> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org Errors-To: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org To: Jesse Barnes Cc: "intel-gfx@lists.freedesktop.org" List-Id: intel-gfx@lists.freedesktop.org On Wed, Feb 27, 2013 at 08:23:56AM -0800, Jesse Barnes wrote: > Great, then if it helps Stephane, I think we should merge it. > = > Acked-by-top-post: Jesse Barnes And applied to -fixes. -Daniel > = > On Wed, 27 Feb 2013 05:50:08 +0000 > "Zhang, Ouping" wrote: > = > > Increase the RC6p threshold from 100000 to 150000, there is no power di= fference between the two values. > > for example: > > (1) I915_WRITE(GEN6_RC6p_THRESHOLD, 100000); > > video time: 11' > > video avg watt 31.3 > > watt-hour: 5.6 > > = > > (2) I915_WRITE(GEN6_RC6p_THRESHOLD, 150000); > > video time: 11' > > video avg watt 31.2 > > watt-hour: 5.6 > > = > > -----Original Message----- > > From: Jesse Barnes [mailto:jbarnes@virtuousgeek.org] = > > Sent: Tuesday, February 26, 2013 12:14 AM > > To: Zhang, Ouping > > Cc: St=E9phane Marchesin; intel-gfx@lists.freedesktop.org > > Subject: Re: [Intel-gfx] [PATCH] drm/i915: Increase the RC6p threshold. > > = > > How does the watt-hour result compare to before the patch? > > = > > Thanks, > > Jesse > > = > > On Mon, 25 Feb 2013 07:33:38 +0000 > > "Zhang, Ouping" wrote: > > = > > > running video workload, video avg watt =3D 38.4 and watt-hour =3D 6.9= cat = > > > /sys/class/drm/card0/power/rc6_residency_ms > > > cat /sys/class/drm/card0/power/rc6p_residency_ms > > > rc6_residency_ms increase from 6708 to 483627 rc6p_residency_ms = > > > increase from 410092 to 423378 > > > = > > > -----Original Message----- > > > From: Jesse Barnes [mailto:jbarnes@virtuousgeek.org] > > > Sent: Friday, February 22, 2013 12:50 AM > > > To: Zhang, Ouping > > > Cc: St=E9phane Marchesin; intel-gfx@lists.freedesktop.org > > > Subject: Re: [Intel-gfx] [PATCH] drm/i915: Increase the RC6p threshol= d. > > > = > > > You have to modify the kernel to make the change Stephane suggested, = then measure the energy consumption across your workloads. I'd expect the = residency to change, but I'm ultimately concerned with the energy used. > > > = > > > Jesse > > > = > > > On Thu, 21 Feb 2013 05:08:10 +0000 > > > "Zhang, Ouping" wrote: > > > = > > > > Hi Jesse, > > > > = > > > > Do you mean increase /sys/class/drm/card0/power/rc6p_residency_ms f= rom 100000 to 150000, and measure power difference on IVB when system is on= idle? > > > > = > > > > -----Original Message----- > > > > From: Jesse Barnes [mailto:jbarnes@virtuousgeek.org] > > > > Sent: Wednesday, February 20, 2013 8:16 AM > > > > To: St=E9phane Marchesin > > > > Cc: intel-gfx@lists.freedesktop.org; Zhang, Ouping > > > > Subject: Re: [Intel-gfx] [PATCH] drm/i915: Increase the RC6p thresh= old. > > > > = > > > > On Tue, 19 Feb 2013 15:53:56 -0800 > > > > St=E9phane Marchesin wrote: > > > > = > > > > > On Tue, Jan 29, 2013 at 7:41 PM, St=E9phane Marchesin wrote: > > > > > = > > > > > > This increases GEN6_RC6p_THRESHOLD from 100000 to 150000. For = > > > > > > some reason this avoids the gen6_gt_check_fifodbg.isra warnings = > > > > > > and associated GPU lockups, which makes my ivy bridge machine s= table. > > > > > > > > > > > > > > > > > Ping? > > > > = > > > > Seems ok to me. Ouping, can you measure any power difference betwe= en the two values? > > > > = > > > > Thanks, > > > > -- > > > > Jesse Barnes, Intel Open Source Technology Center > > > = > > > = > > > -- > > > Jesse Barnes, Intel Open Source Technology Center > > = > > = > > -- > > Jesse Barnes, Intel Open Source Technology Center > = > = > -- = > Jesse Barnes, Intel Open Source Technology Center > _______________________________________________ > Intel-gfx mailing list > Intel-gfx@lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/intel-gfx -- = Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch