[Intel-gfx] [PATCH] drm/i915: add rc6 residency times to debugfs

[Daniel Vetter]

On Sat, Mar 24, 2012 at 03:58:01PM +0100, Daniel Vetter wrote:
> On Fri, Mar 23, 2012 at 01:43:22PM -0300, Eugeni Dodonov wrote:
> > On Thu, Mar 22, 2012 at 22:42, Ben Widawsky <ben at bwidawsk.net> wrote:
> > 
> > > RC6 residency should be in intervals of 1.28us, and the counter wraps.
> > > Here is an example using awk to get the RC6 and RC6+ residency in
> > > seconds, since boot.
> > >
> > > cat /sys/kernel/debug/dri/0/i915_drpc_info  | grep residency | awk -F':'
> > > -F' '  '{print $5 * 1.28 / 1000000}'
> > >
> > > This is primarily for QA, but has other applications as well.
> > >
> > 
> > Note that we already have this in intel_reg_dumper as well, since
> > http://cgit.freedesktop.org/xorg/app/intel-gpu-tools/commit/?id=47a5bc505cb972cc94f1fbd9882d4e5c2e72ac43
> > .
> > 
> > But if it makes sense to include it into kernel as well, why not?
> > 
> > Reviewed-by: Eugeni Dodonov <eugeni.dodonov at intel.com>
> 
> Queued for -next, thanks for the patch and review.

Unqueued after some irc discussion with Ben, looks like we don't yet fully
understand how this works (and at least an rc6pp reg seems to be missing).
-Daniel
-- 
Daniel Vetter
Mail: daniel at ffwll.ch
Mobile: +41 (0)79 365 57 48