Re: [PATCH v2] drm/i915/bdw: BDW Software Turbo

Chris Wilson
2014-07-10T08:32:42Z

On Wed, Jul 09, 2014 at 06:00:48PM -0700, Daisy Sun wrote:
> BDW supports GT C0 residency reporting in constant time unit. Driver calculates
> GT utilization based on C0 residency and adjusts RP frequency up/down
> accordingly.

This explanation is a bit thin on the ground for why you want to run
permanently at a single GPU frequency. And the algorithm looks primitive
at best.
-Chris

--
Chris Wilson, Intel Open Source Technology Centre