[Bug 88435] New: [BDW]igt/gem_concurrent_blit/cpu-bcs-early-read-forked-hang(rcs) sporadically takes more than 10 minutes or fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=88435

            Bug ID: 88435
           Summary: [BDW]igt/gem_concurrent_blit/cpu-bcs-early-read-forked
                    -hang(rcs) sporadically takes more than 10 minutes or
                    fail
           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 112262
  --> https://bugs.freedesktop.org/attachment.cgi?id=112262&action=edit
dmesg

==System Environment==
--------------------------
Regression: no, new case

Non-working platforms:  BDW

==kernel==
--------------------------
drm-intel-nightly/95cce4b4c5f3ecaf9c1c01d42f670da2748fcffb
commit 95cce4b4c5f3ecaf9c1c01d42f670da2748fcffb
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Wed Jan 14 20:58:31 2015 +0100

    drm-intel-nightly: 2015y-01m-14d-19h-58m-09s UTC integration manifest

==Bug detailed description==
-----------------------------
Run 3 cycles on BDW nightly kernel, it fails once and  takes more than 10
mingutes twice.
It skip on -fixes kernel.

output:
[root at x-bdw01 tests]# time ./gem_concurrent_blit --run-subtest
cpu-bcs-early-read-forked-hang\(rcs\)
IGT-Version: 1.9-g3214a27 (x86_64) (Linux:
3.19.0-rc4_drm-intel-nightly_95cce4_20150115+ x86_64)
using 2x512 buffers, each 1MiB
Test assertion failure function gem_quiescent_gpu, file drmtest.c:168:
Failed assertion: drmIoctl((fd), ((((1U) << (((0+8)+8)+14)) | ((('d')) <<
(0+8)) | (((0x40 + 0x29)) << 0) | ((((sizeof(struct
drm_i915_gem_execbuffer2)))) << ((0+8)+8)))), (&execbuf)) == 0
Last errno: 5, Input/output error
child 10 failed with exit status 99
Subtest cpu-bcs-early-read-forked-hang(rcs): FAIL (257.637s)

real    4m21.527s
user    0m6.242s
sys     0m8.217s
[root at x-bdw01 tests]# time ./gem_concurrent_blit --run-subtest
cpu-bcs-early-read-forked-hang\(rcs\)
IGT-Version: 1.9-g3214a27 (x86_64) (Linux:
3.19.0-rc4_drm-intel-nightly_95cce4_20150115+ x86_64)
using 2x512 buffers, each 1MiB
Test assertion failure function gem_quiescent_gpu, file drmtest.c:168:
Failed assertion: drmIoctl((fd), ((((1U) << (((0+8)+8)+14)) | ((('d')) <<
(0+8)) | (((0x40 + 0x29)) << 0) | ((((sizeof(struct
drm_i915_gem_execbuffer2)))) << ((0+8)+8)))), (&execbuf)) == 0
Last errno: 5, Input/output error
child 5 failed with exit status 99
Subtest cpu-bcs-early-read-forked-hang(rcs): FAIL (721.842s)

real    12m5.701s
user    0m7.615s
sys     0m12.919s

==Reproduce steps==
---------------------------- 
1. time ./gem_concurrent_blit --run-subtest
cpu-bcs-early-read-forked-hang\(rcs\)

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