[Bug 90112] [BSW bisected] OglGSCloth/Lightsmark/CS/ Portal/ Half Life 2 games performance decreased by 15%-45%

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90112

Ding Heng <hengx.ding at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |NEW

--- Comment #42 from Ding Heng <hengx.ding at intel.com> ---
(In reply to Eero Tamminen from comment #41)
> On BSW, it's probably better to do testing of this kind of issues also with
> ACPI ondemand governor, in case issue is related to process scheduler /
> power management.
> 
> Please test performance of the problematic commit and commit preceeding it
> after booting kernel with following kernel bootup option:
> "intel_pstate=disable".  How large the BSW perf difference is with that
> configuration?

On BSW, there is still about 17% performance difference between the first bad
commit and its parent commit. Seems adding intel_pstate=disable in kernel
option didn't make any difference.

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