[Bug 89077] New: [BSW]igt/gem_concurrent_blit/cpu-gtt-gpu-read-after-write-forked takes more than 10 minutes

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89077

            Bug ID: 89077
           Summary: [BSW]igt/gem_concurrent_blit/cpu-gtt-gpu-read-after-wr
                    ite-forked 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 113338
  --> https://bugs.freedesktop.org/attachment.cgi?id=113338&action=edit
dmesg

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

no-working platforms: BSW

==kernel==
--------------------------
drm-intel-nightly/ad95125eaef18eebb9f47261ce3c99957f5953de
commit ad95125eaef18eebb9f47261ce3c99957f5953de
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Mon Feb 9 21:31:04 2015 +0100

    drm-intel-nightly: 2015y-02m-09d-20h-26m-16s UTC integration manifest

==Bug detailed description==
It takes more than 10 minutes. We test full gem_concurrent_blit the first round
on BSW since 160 new subcase merged.
Following cases also take more than 10 minutes:
igt/gem_concurrent_blit/cpu-gtt-gpu-read-after-write-interruptible
igt/gem_concurrent_blit/gpu-gtt-gpu-read-after-write-interruptible
igt/gem_concurrent_blit/gpuX-gtt-gpu-read-after-write-forked
igt/gem_concurrent_blit/gpuX-gtt-gpu-read-after-write-interruptible
igt/gem_concurrent_blit/gtt-gtt-gpu-read-after-write-interruptible


IGT-Version: 1.9-g9846e7f (x86_64) (Linux:
3.19.0_drm-intel-nightly_34f9b9_20150211+ x86_64)
using 2x512 buffers, each 1MiB
Subtest cpu-gtt-gpu-read-after-write-forked: SUCCESS (517.509s)

real    10m51.817s
user    34m2.487s
sys     2m40.405s

==Reproduce steps==
---------------------------- 
1. time ./gem_concurrent_blit --run-subtest cpu-gtt-gpu-read-after-write-forked

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