Quoting Chris Wilson (2018-04-25 12:31:29)
> Quoting Chris Wilson (2018-04-25 12:23:30)
> > Quoting Mika Kuoppala (2018-04-25 12:19:08)
> > > Did you try with WA_TAIL_DWORDS 16?
> >
> > Sure can try, but the error state doesn't indicate TAIL==HEAD as would
> > be the issue with WaIdleLiteRestore (restoring to an idle ring wouldn't
> > generate the arbitration event, so no more context switches).
>
> Watch https://patchwork.freedesktop.org/series/42284/
>
> Actually surviving on my bdw
And what appears to work just as well is
@@ -1387,7 +1387,7 @@ static int execlists_request_alloc(struct i915_request
*request)
*/
request->reserved_space += EXECLISTS_REQUEST_SIZE;
- ret = intel_ring_wait_for_space(request->ring, request->reserved_space);
+ ret = intel_ring_cacheline_align(request);
if (ret)
return ret;
If that doesn't hint towards some weirdness in HW, I don't know what
would ;)
-Chris
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