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" <ouping.zh...@intel.com> wrote: > Hi Jesse, > > Do you mean increase /sys/class/drm/card0/power/rc6p_residency_ms from 100000 > to 150000, and measure power difference on IVB when system is on idle? > > -----Original Message----- > From: Jesse Barnes [mailto:jbar...@virtuousgeek.org] > Sent: Wednesday, February 20, 2013 8:16 AM > To: Stéphane Marchesin > Cc: intel-gfx@lists.freedesktop.org; Zhang, Ouping > Subject: Re: [Intel-gfx] [PATCH] drm/i915: Increase the RC6p threshold. > > On Tue, 19 Feb 2013 15:53:56 -0800 > Stéphane Marchesin <marc...@chromium.org> wrote: > > > On Tue, Jan 29, 2013 at 7:41 PM, Stéphane Marchesin > > <marc...@chromium.org>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 stable. > > > > > > > > Ping? > > Seems ok to me. Ouping, can you measure any power difference between the two > values? > > Thanks, > -- > 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
