[igt-dev] [PATCH i-g-t] tests/i915/gem_threaded_access_tiled: Require fences

[Chris Wilson]

Quoting Antonio Argenziano (2020-02-14 00:40:37)
> The test tries to allocate tiled objects which is not possible without
> fences.
> 
> Signed-off-by: Antonio Argenziano <antonio.argenziano at intel.com>
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Dixit, Ashutosh <ashutosh.dixit at intel.com>

All the test is doing is parallel page faulting/copying from an object
and not try to determine if it saw any bogosity.

Of one object, so not even any thrashing, or any page faults after the
first. Virtually no contention or any time in the kernel at all.

I don't see it increasing any path coverage through the kernel at all.
A tiny bit in HW, but that is also done by gem_mmap_gtt/forked

Nevertheless,
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
-Chris