[Intel-gfx] [PATCH] drm/i915: Adjustable Render Power State policies

[Chris Wilson]

On Thu, Aug 01, 2013 at 05:15:36AM +0000, Zhang, Ouping wrote:
> Test patch on Harris Beach, 
> max frequency: 1100
> lowest frequency : 200
> 
> For doom3, When waking from idle, boost the render frequency to RP1(200). At every upclock request, increase to halfway between the current frequency and maximum. attached the frequency changing of doom3.
> Applied the patch, performance improved, but consumed more power, except smokin-guns workload, performance improved and consumed less power.

Hmm, the plan was not to affect idle power consumption. Can you log
measured frequency and rc6 state whilst idle? I wonder if something is
preventing the system from idling. Maybe we need something like perf
timechart to measure wakeups over time.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre