[Intel-gfx] [PATCH] drm/i915: add a tracepoint for gpu frequency changes

[Chris Wilson]

On Thu, 30 Aug 2012 13:26:48 +0200, Daniel Vetter <daniel.vetter at ffwll.ch> wrote:
> We've had and still have too many issues where the gpu turbot doesn't
> quite to what it's supposed to do (or what we want it to do).
> 
> Adding a tracepoint to track when the desired gpu frequence changes
> should help a lot in characterizing and understanding problematic
> workloads.
> 
> Also, this should be fairly interesting for power tuning (and
> especially noticing when the gpu is stuck in high frequencies, as has
> happened in the past) and hence for integration into powertop and
> similar tools.
> 
> Cc: Arjan van de Ven <arjan at linux.intel.com>
> Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>

Like it, even the naming scheme.
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre