[Bug 84891] [BYT/BSW Bisected full-ppgtt] igt/gem_concurrent_blit/gtt-bcs-overwrite-source-forked fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84891

Guo Jinxian <jinxianx.guo at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|bisect_pending              |
           Assignee|intel-gfx-bugs at lists.freede |daniel at ffwll.ch
                   |sktop.org                   |
            Summary|[BYT/BSW Regression         |[BYT/BSW Bisected
                   |full-ppgtt]                 |full-ppgtt]
                   |igt/gem_concurrent_blit/gtt |igt/gem_concurrent_blit/gtt
                   |-bcs-overwrite-source-forke |-bcs-overwrite-source-forke
                   |d fails                     |d fails

--- Comment #6 from Guo Jinxian <jinxianx.guo at intel.com> ---
3e766b8255efb6c994e6501be2af44b4bdc4d191 is the first bad commit
Author:     Daniel Vetter <daniel.vetter at ffwll.ch>
AuthorDate: Tue Sep 23 15:15:51 2014 +0200
Commit:     Daniel Vetter <daniel.vetter at ffwll.ch>
CommitDate: Wed Sep 24 14:36:57 2014 +0200

    igt/gem_concurrent_blit: Only read back a few GTT values

    Due to the nature of the test, we can be reasonably sure that it is
    either all copied or not. So we can sacrificing testing the entire
    buffer for the expected value in order to speed up the test by only
    testing along the diagonal.

    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=84354
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

:040000 040000 5b32918646a47efebfe8fadb39be98af92d1b8cf
920b72d176094ba494a09400a1b8b7b4491b732d M      tests


[root at x-bsw01 tests]# ./gem_concurrent_blit --run-subtest
gtt-bcs-overwrite-source-forked
IGT-Version: 1.8-gc049c39 (x86_64) (Linux:
3.18.0-rc3_drm-intel-nightly_b921a5_20141109+ x86_64)
using 2x512 buffers, each 1MiB
Test assertion failure function gtt_cmp_bo, file gem_concurrent_blit.c:124:
Failed assertion: vaddr[y*width+y] == val
error: 0x46eef3 != 0xf
child 6 failed with exit status 99
Subtest gtt-bcs-overwrite-source-forked: FAIL (3.269s)
[root at x-bsw01 tests]# dmesg -r|egrep "<[1-4]>"|grep drm
<3>[10555.596945] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR*
pipe B underrun
<3>[10555.596982] [drm:valleyview_pipestat_irq_handler [i915]] *ERROR* CPU pipe
B FIFO underrun

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