[Bug 71029] [ilk] igt/gem_close_race is slow due to mutex contention vs clflush

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=71029

--- Comment #19 from Chris Wilson <chris at chris-wilson.co.uk> ---
For reference:

ickle at u160 ~/intel-gpu-tools/tests $ time sudo ./gem_close_race
IGT-Version: 1.5-ga9d1fe0 (x86_64) (Linux: 3.13.0-rc8+ x86_64)
Subtest process-exit: SUCCESS
Subtest gem-close-race: SUCCESS

real    211m48.483s
user    0m5.860s
sys    432m50.890s

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