[PATCH v8 08/12] drm/i915: advertise available metrics via sysfs

[sourab gupta]

On Thu, 2016-10-27 at 19:14 -0700, Robert Bragg wrote:
> Each metric set is given a sysfs entry like:
> 
> /sys/class/drm/card0/metrics/<guid>/id
> 
> This allows userspace to enumerate the specific sets that are available
> for the current system. The 'id' file contains an unsigned integer that
> can be used to open the associated metric set via
> DRM_IOCTL_I915_PERF_OPEN. The <guid> is a globally unique ID for a
> specific OA unit register configuration that can be reliably used by
> userspace as a key to lookup corresponding counter meta data and
> normalization equations.
> 
> The guid registry is currently maintained as part of gputop along with
> the XML metric set descriptions and code generation scripts, ref:
> 
>  https://github.com/rib/gputop
>  > gputop-data/guids.xml
>  > scripts/update-guids.py
>  > gputop-data/oa-*.xml
>  > scripts/i915-perf-kernelgen.py
> 
>  $ make -C gputop-data -f Makefile.xml SYSFS=1 WHITELIST=RenderBasic
> 
> Signed-off-by: Robert Bragg <robert at sixbynine.org>
> Reviewed-by: Matthew Auld <matthew.auld at intel.com>
Looks good to me.
Reviewed-by: Sourab Gupta <sourab.gupta at intel.com>