On Wed, 01 Aug 2012 10:38:36 +0100, James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx> wrote: > On Wed, 2012-08-01 at 09:58 +0100, Chris Wilson wrote: > > On Wed, 01 Aug 2012 09:45:04 +0100, James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx> wrote: > > > On Wed, 2012-08-01 at 09:16 +0100, Chris Wilson wrote: > > > > On Wed, 01 Aug 2012 09:06:12 +0100, James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx> wrote: > > > > > I got the attached to apply and it doesn't really improve the idle power > > > > > much (12.5W). > > > > > > > > That's good to know. Next step is to try overriding i915.semaphores. > > > > Can you please test with i915.semaphores=0 and i915.semaphores=1? > > > > > > There's not much point doing i915_semaphores=1 since that's the default > > > on gen 6 hardware, but i915_semaphores=0 recovers and idle power of > > > ~6.5W > > > > It is only the default if iommu is off, and changing the default > > was one of the side-effects of the patch you bisected. > > > > Can you please login to the desktop, let it idle, record > > /sys/kernel/debug/dri/0/i915_cur_delayinfo and .../i915_drpc_info. > > Then trace-cmd record -e i915 sleep 10s, > > OK, what is trace-cmd? It looks similar to perf tools ... is that it? Yes, it is roughly equivalent and you should be able to achieve the same with perf trace - except I haven't done it before so I don't have quick advice on how to drive it. :) -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
