[Bug 107410] [SKL] Up to 20% performance regression in GpuTest Triangle, due to 2x higher CPU power usage

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107410

Srinivas Pandruvada <srinivas.pandruvada at linux.intel.com> changed:

           What    |Removed                     |Added
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                 CC|                            |srinivas.pandruvada at linux.i
                   |                            |ntel.com

--- Comment #6 from Srinivas Pandruvada <srinivas.pandruvada at linux.intel.com> ---
Created attachment 140870
  --> https://bugs.freedesktop.org/attachment.cgi?id=140870&action=edit
Try these steps

1.
First check if you have
/sys/devices/system/cpu/intel_pstate/hwp_dynamic_boost == 1
Unfortunately some Xeon E3 reused DESKTOP CPU ID.

2.
If yes, as Chris suggested, try
#echo 0 >  /sys/devices/system/cpu/intel_pstate/hwp_dynamic_boost

If this fixes, try the attached patch. After this patch should be 
/sys/devices/system/cpu/intel_pstate/hwp_dynamic_boost == 0 if your platform is
not a E3.

If you still see attach output of
#acpidump > acpi.out

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