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>
--
Eugeni Dodonov
<http://eugeni.dodonov.net/>
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