[Intel-gfx] [PATCH] drm/i915/vlv: Modifying RC6 Promotion timer for Media workloads.

Chris Wilson chris at chris-wilson.co.uk
Fri Dec 18 02:24:09 PST 2015

On Fri, Dec 18, 2015 at 03:44:36PM +0530, Namrta Salonie wrote:
> In normal cases, RC6 promotion timer is 1700us. This will result in more
> time spent in C1 state. For more residency in C6 in case of media workloads,
> this is changed to 250us. Not doing this for 3D workloads as too many C6-C0
> transition delays can result in performance impact. Tracking the media
> workloads based on command submission to MFX engine.

Why bother flipping the media rc6 timeout? Why not just set it to the
new preferred value?

Other wise fix the use of a duplicate task (duplicates
retire-work/idle-work) (and not doing correct rpm wakeref tracking or
documentating that you only set if on the second batch, which seems an
interesting choice.)

Chris Wilson, Intel Open Source Technology Centre

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