]> git.baikalelectronics.ru Git - kernel.git/commit
drm/i915: add a tracepoint for gpu frequency changes
authorDaniel Vetter <daniel.vetter@ffwll.ch>
Thu, 30 Aug 2012 11:26:48 +0000 (13:26 +0200)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Mon, 3 Sep 2012 08:09:27 +0000 (10:09 +0200)
commita5af47d1517638790175cb0827320c75c451dd2e
tree739ab423a51ed2a61f4fac7ec895752b81f2ece4
parent5c91237153d0f33e7098fa67ca6c90f89524abd5
drm/i915: add a tracepoint for gpu frequency changes

We've had and still have too many issues where the gpu turbo 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 frequency 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@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Paul Menzel <paulepanter@users.sourceforge.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/i915/i915_trace.h
drivers/gpu/drm/i915/intel_pm.c