Re: [Intel-gfx] [PATCH 04/10] drm/i915: Reduce RPS update frequency on Valleyview/Cherryview

On Fri, Apr 19, 2019 at 06:13:56PM +0100, Chris Wilson wrote: > Valleyview and Cherryview update the GPU frequency via the punit, which > is very expensive as we have to ensure the cores do not sleep during the > comms. If we perform frequent RPS evaluations, the frequent punit > requests cause

[Intel-gfx] [PATCH 04/10] drm/i915: Reduce RPS update frequency on Valleyview/Cherryview

Valleyview and Cherryview update the GPU frequency via the punit, which is very expensive as we have to ensure the cores do not sleep during the comms. If we perform frequent RPS evaluations, the frequent punit requests cause measurable system overhead for little benefit, so increase the

[Intel-gfx] [PATCH 04/10] drm/i915: Reduce RPS update frequency on Valleyview/Cherryview

Valleyview and Cherryview update the GPU frequency via the punit, which is very expensive as we have to ensure the cores do not sleep during the comms. If we perform frequent RPS evaluations, the frequent punit requests cause measurable system overhead for little benefit, so increase the