[Intel-gfx] [RFC v1] Data port coherency control for UMDs.

[Dunajski, Bartosz]

This functionality is used by new OCL drvier (aka. NEO):
https://github.com/intel/compute-runtime 

Starting from commit: 933312e0986d3a7c1ef557e511eb4ced301ea292

-----Original Message-----
From: Joonas Lahtinen [mailto:joonas.lahtinen at linux.intel.com] 
Sent: Monday, March 19, 2018 2:54 PM
To: Lis, Tomasz <tomasz.lis at intel.com>; intel-gfx at lists.freedesktop.org; Dave Airlie <airlied at redhat.com>
Cc: Dunajski, Bartosz <bartosz.dunajski at intel.com>; chris at chris-wilson.co.uk; Winiarski, Michal <michal.winiarski at intel.com>
Subject: Re: [RFC v1] Data port coherency control for UMDs.

+ Dave, as FYI

Quoting Tomasz Lis (2018-03-19 14:37:34)
> The OpenCL driver develpers requested a functionality to control cache 
> coherency at data port level. Keeping the coherency at that level is 
> disabled by default due to its performance costs. OpenCL driver is 
> planning to enable it for a small subset of submissions, when such 
> functionality is required.

Can you please link to the corresponding OpenCL driver changes? I'm assuming this relates to the new-driver-to-be-adopted, instead of Beignet?

How is the story/schedule looking for adopting the new driver to distros?

Seeing the userspace counterpart and tests will help in assessing the suggested changes.

Regards, Joonas
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