[Bug 80079] [SNB/IVB/HSW/BYT/BDW]igt/gem_fence_upload some subcases fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=80079

--- Comment #4 from Guo Jinxian <jinxianx.guo at intel.com> ---
The test timeout sometimes
[root at x-pk1 tests]# time ./gem_fence_upload --run-subtest thread-contention
IGT-Version: 1.7-gfedb9b6 (x86_64) (Linux:
3.16.0-rc2_drm-intel-fixes_bfafe9_20140624+ x86_64)
Contended upload rate for 1 linear threads:     818.498MiB/s
Contended upload rate for 1 tiled threads:      931.045MiB/s
Contended upload rate for 2 linear threads:     701.677MiB/s
Contended upload rate for 2 tiled threads:      783.641MiB/s
Contended upload rate for 4 linear threads:     536.679MiB/s
Contended upload rate for 4 tiled threads:      574.223MiB/s
Contended upload rate for 8 linear threads:       2.550MiB/s
Contended upload rate for 8 tiled threads:        2.566MiB/s
Contended upload rate for 16 linear threads:      2.320MiB/s
Contended upload rate for 16 tiled threads:       2.316MiB/s
Contended upload rate for 32 linear threads:      3.090MiB/s
Contended upload rate for 32 tiled threads:       3.083MiB/s
Test assertion failure function thread_contention, file gem_fence_upload.c:321:
Last errno: 0, Success
Failed assertion: linear[1] > 0.75 * linear[0]
Subtest thread-contention: FAIL

real    10m53.102s
user    0m0.095s
sys     43m17.662s

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