[Bug 84354] New: [BSW]igt/gem_concurrent_blit some subcases cause long time to execute

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84354

          Priority: medium
            Bug ID: 84354
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [BSW]igt/gem_concurrent_blit some subcases cause long
                    time to execute
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: jinxianx.guo at intel.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 106900
  --> https://bugs.freedesktop.org/attachment.cgi?id=106900&action=edit
dmesg

==System Environment==
--------------------------
Regression: Not sure.
I don't find good commit on both kernel and igt

Non-working platforms: BSW

==kernel==
--------------------------
origin/drm-intel-nightly: 7101d84020f63f1da7e0c5d021cdd6be4d515de5(fails)
    drm-intel-nightly: 2014y-09m-25d-15h-14m-02s UTC integration manifest
origin/drm-intel-next-queued: 7ca5a41f4da201371e131fc0641033652f76bf30(fails)
    drm/i915: Avoid re-configure panel on every PSR re-enable.
origin/drm-intel-fixes: c84db77010877da6c5da119868ed54c43d59e726(fails)
    drm/i915/hdmi: fix hdmi audio state readout

==Bug detailed description==
-----------------------------
igt/gem_concurrent_blit some subcases cause long time to execute

Case list:
igt/gem_concurrent_blit/gtt-bcs-early-read-forked
igt/gem_concurrent_blit/gtt-bcs-early-read-interruptible
igt/gem_concurrent_blit/gtt-bcs-gpu-read-after-write-forked
igt/gem_concurrent_blit/gtt-bcs-gpu-read-after-write-interruptible
igt/gem_concurrent_blit/gtt-bcs-overwrite-source-forked
igt/gem_concurrent_blit/gtt-bcs-overwrite-source-interruptible
igt/gem_concurrent_blit/gtt-rcs-early-read-forked
igt/gem_concurrent_blit/gtt-rcs-early-read-interruptible
igt/gem_concurrent_blit/gtt-rcs-gpu-read-after-write-forked
igt/gem_concurrent_blit/gtt-rcs-gpu-read-after-write-interruptible
igt/gem_concurrent_blit/gtt-rcs-overwrite-source-forked
igt/gem_concurrent_blit/gtt-rcs-overwrite-source-interruptible
igt/gem_concurrent_blit/gttX-bcs-early-read-forked
igt/gem_concurrent_blit/gttX-bcs-early-read-interruptible
igt/gem_concurrent_blit/gttX-bcs-gpu-read-after-write-forked
igt/gem_concurrent_blit/gttX-bcs-gpu-read-after-write-interruptible
igt/gem_concurrent_blit/gttX-bcs-overwrite-source-forked
igt/gem_concurrent_blit/gttX-bcs-overwrite-source-interruptible
igt/gem_concurrent_blit/gttX-rcs-early-read-forked
igt/gem_concurrent_blit/gttX-rcs-early-read-interruptible
igt/gem_concurrent_blit/gttX-rcs-gpu-read-after-write-forked
igt/gem_concurrent_blit/gttX-rcs-gpu-read-after-write-interruptible
igt/gem_concurrent_blit/gttX-rcs-overwrite-source-forked
igt/gem_concurrent_blit/gttX-rcs-overwrite-source-interruptible

Output:
[root at x-bsw01 tests]# time ./gem_concurrent_blit --run-subtest
gtt-bcs-early-read-interruptible
IGT-Version: 1.8-g4b81e9c (x86_64) (Linux:
3.17.0-rc6_drm-intel-nightly_0f7cc1_20140925+ x86_64)
using 2x512 buffers, each 1MiB
Subtest gtt-bcs-early-read-interruptible: SUCCESS (621.329s)

real    10m21.884s
user    10m13.709s
sys     0m11.420s

==Reproduce steps==
---------------------------- 
1. ./gem_concurrent_blit --run-subtest gtt-bcs-early-read-interruptible

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