[Bug 110882] i[CI][SHARDS] igt at gem_mmap_gtt@forked-* - timeout - extremely slow on ICL

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110882

--- Comment #6 from Martin Peres <martin.peres at free.fr> ---
(In reply to Chris Wilson from comment #5)
> Temporary band-aid:
> 
> commit 6cb3d4a9457cdfb993ebb2a086a4844b85c49ee2 (upstream/master,
> origin/master, origin/HEAD)
> Author: Chris Wilson <chris at chris-wilson.co.uk>
> Date:   Mon Jun 10 13:52:02 2019 +0100
> 
>     i915/gem_mmap_gtt: Disregard forked subtests on ICL for reasons
>     
>     Nothing to see here, please move along.
>     
>     The short story seems to be that a BIOS update made concurrent GTT
>     access a few orders of magnitude slower, severely hampering CI. Where
>     the fault actually lies is unknown, and how to circumvent it, unknown.
>     
>     References: https://bugs.freedesktop.org/show_bug.cgi?id=110882
>     Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
>     Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
>     Cc: Martin Peres <martin.peres at linux.intel.com>
>     Acked-by: Daniel Vetter <daniel at ffwll.ch>

Thanks, it got rid of most of the issues. We still have the following tests
being executed though:

Test                                  Machine     Min (s)  Avg (s)  Max (s)
igt at gem_mmap_gtt@forked-big-copy      shard-iclb  803.781   937.90  1063.49
igt at gem_mmap_gtt@forked-big-copy-odd  shard-iclb  974.263  1002.33  1044.71

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