[Bug 92975] [SKL][v4.3 bisected]SKL OpenCL performance reduced hugely

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92975

Jani Nikula <jani.nikula at intel.com> changed:

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

--- Comment #7 from Jani Nikula <jani.nikula at intel.com> ---
(In reply to meng from comment #6)
> Just check, "CONFIG_DRM_I915_PRELIMINARY_HW_SUPPORT=y" is in our
> .config(both v4.3 and pre_v4.3).

Ah, okay.

> try the above patch on the first bad commit, the OpenCL performance issues
> can't be reproduced. 

Thanks for testing; may I ask for two more test rounds, first current
drm-intel-nightly branch of http://cgit.freedesktop.org/drm-intel, and then
drm-intel-nightly + the patch from comment #4.

> BTW, no the patch, no "*ERROR* MOCS failed" in dmesg.
> if with the patch, there is "*ERROR* MOCS failed

This is expected, thanks for checking.

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