[Bug 88983] New: [BSW]igt/gem_fence_thrash/bo-write-verify-threaded-y sporadically takes more than 10 minutes

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=88983

            Bug ID: 88983
           Summary: [BSW]igt/gem_fence_thrash/bo-write-verify-threaded-y
                    sporadically takes more than 10 minutes
           Product: DRI
           Version: unspecified
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: huax.lu at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 113173
  --> https://bugs.freedesktop.org/attachment.cgi?id=113173&action=edit
dmesg

==System Environment==
--------------------------
Regression: not sure

no-working platforms: BSW

==kernel==
--------------------------
drm-intel-nightly/0eafcbf6bc5917efd97c9916329c6f859cfb41ed
commit 0eafcbf6bc5917efd97c9916329c6f859cfb41ed
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Tue Feb 3 19:19:19 2015 +0100

    drm-intel-nightly: 2015y-02m-03d-18h-18m-53s UTC integration manifest

==Bug detailed description==
-----------------------------
It sporadically takes more than 10 minutes in automation testing. I test it
manually 5 cycles,it takes 9m55s.

output:
IGT-Version: 1.9-g87edb51 (x86_64) (Linux:
3.19.0-rc7_drm-intel-nightly_9583cb_20150205+ x86_64)
write-verify: threads 32, fences 16, tiling 2, surfaces per thread 2
write-verify: threads 80, fences 16, tiling 2, surfaces per thread 2
write-verify: threads 160, fences 16, tiling 2, surfaces per thread 2
write-verify: threads 320, fences 16, tiling 2, surfaces per thread 2
Subtest bo-write-verify-threaded-y: SUCCESS (595.839s)

real    9m55.854s
user    39m37.443s
sys     0m2.840s

test log:
@test: Intel_gpu_tools/igt_gem_fence_thrash_bo-write-verify-threaded-y
info: @@@Returncode: 1

Errors:
Time out

Output:
Time out
request_quit: 1
returncode: 1
result: timeout
summary: Intel_gpu_tools/igt_gem_fence_thrash_bo-write-verify-threaded-y   
TIMEOUT

==Reproduce steps==
---------------------------- 
1. run all igt cases

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