Re: [Intel-gfx] [PATCH] drm/i915: Aggressively downclock Baytrail

2014-07-03 Thread Jesse Barnes
On Thu, 3 Jul 2014 16:59:17 +0100 Chris Wilson wrote: > On Thu, Jul 03, 2014 at 08:49:22AM -0700, Jesse Barnes wrote: > > On Thu, 3 Jul 2014 15:29:26 +0100 > > Chris Wilson wrote: > > > > > Baytrail uses the RPS wait-boosting mechanism of Sandybridge+ but also has > > > a very lax downclocking

Re: [Intel-gfx] [PATCH] drm/i915: Aggressively downclock Baytrail

2014-07-03 Thread Chris Wilson
On Thu, Jul 03, 2014 at 08:49:22AM -0700, Jesse Barnes wrote: > On Thu, 3 Jul 2014 15:29:26 +0100 > Chris Wilson wrote: > > > Baytrail uses the RPS wait-boosting mechanism of Sandybridge+ but also has > > a very lax downclocking strategy (upclock if more than 90% busy over 76ms, > > downclock if

Re: [Intel-gfx] [PATCH] drm/i915: Aggressively downclock Baytrail

2014-07-03 Thread Jesse Barnes
On Thu, 3 Jul 2014 15:29:26 +0100 Chris Wilson wrote: > Baytrail uses the RPS wait-boosting mechanism of Sandybridge+ but also has > a very lax downclocking strategy (upclock if more than 90% busy over 76ms, > downclock if less than 70% busy over 450ms). This causes Baytrail to use > maximum clo

[Intel-gfx] [PATCH] drm/i915: Aggressively downclock Baytrail

2014-07-03 Thread Chris Wilson
Baytrail uses the RPS wait-boosting mechanism of Sandybridge+ but also has a very lax downclocking strategy (upclock if more than 90% busy over 76ms, downclock if less than 70% busy over 450ms). This causes Baytrail to use maximum clocks, and for them to stay high, when doing simple tasks such as s