[Intel-gfx] [RFC 0/4] Eliminating the execlist retired request queue

[Chris Wilson]

On Mon, Apr 11, 2016 at 10:19:29AM +0100, Tvrtko Ursulin wrote:
> 
> On 09/04/16 09:03, Chris Wilson wrote:
> >On Fri, Apr 08, 2016 at 02:54:54PM +0100, Tvrtko Ursulin wrote:
> >>From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> >>
> >>Retired request queue coupled with retired work handler is a scalability
> >>concern on some workloads of which one dramatic example is gem_close_race.
> >>
> >>This series depend on i915_gem_object_pin_map series by Chris Wilson.
> >
> >My biggest concern with this is that this touches code that has a known
> >GPF and so imo cannot be tested until that *regression* has been fixed.
> 
> That's the ringbuffer one or something else?

There's a GPF when we try to require a stale request because our state
tracking is caput.

https://bugs.freedesktop.org/show_bug.cgi?id=93907

Skylake was also misrendering under the same load, but that's likely to
be a different bug that I couldn't reproduce after fixing the above.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre