[Bug 83031] New: [IVB]Piglit spec_ARB_buffer_storage_bufferstorage-persistent_read_coherent_client-storage sporadically fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83031

          Priority: medium
            Bug ID: 83031
          Assignee: idr at freedesktop.org
           Summary: [IVB]Piglit
                    spec_ARB_buffer_storage_bufferstorage-persistent_read_
                    coherent_client-storage sporadically fail
        QA Contact: intel-3d-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: huax.lu at intel.com
          Hardware: All
            Status: NEW
           Version: unspecified
         Component: Drivers/DRI/i965
           Product: Mesa

System Environment:
--------------------------
Platform: IVB
Libdrm:       
(master)libdrm-2.4.56-10-g22b995d8cbf1059535c5de5ba1869c1623ae5b08
Mesa:        (master)8d8a5eb792c662a8def7c9ab65d2df67972cf659
Xserver:   
(master)xorg-server-1.15.99.902-121-g2f5cf9ff9a0f713b7e038636484c77f113a5f10a
Xf86_video_intel:(master)2.99.914-67-g12c051d5c673d79c16a3a1478c0977799484ca95
Libva:        (master)acfcd5f0637a951d50c5112c7dfbd46f1d0dcdb3
Libva_intel_driver:(master)f3f49f2f0e6b3669d9b09341a11cf0b96e138674
Kernel:   (drm-intel-nightly)257d90d13794c2eb545ab0d6c708f21e2a0378b6

Bug detailed description:
---------------------------
It sporadically fails on IVB with mesa master and 10.3 branch. fail rate:4/5

output:
[root at x-ivb9 piglit]# bin/bufferstorage-persistent read coherent client-storage
-fbo -auto
Probe [0] failed. Expected: 17.000000  Observed: 0.000000
Probe [1] failed. Expected: 13.000000  Observed: 0.000000
Probe [3] failed. Expected: 17.000000  Observed: 0.000000
Probe [4] failed. Expected: 18.000000  Observed: 0.000000
Probe [6] failed. Expected: 12.000000  Observed: 0.000000
Probe [7] failed. Expected: 13.000000  Observed: 0.000000
Probe [9] failed. Expected: 12.000000  Observed: 0.000000
Probe [10] failed. Expected: 18.000000  Observed: 0.000000
Probe [12] failed. Expected: 27.000000  Observed: 0.000000
Probe [13] failed. Expected: 13.000000  Observed: 0.000000
PIGLIT: {"result": "fail" }
[root at x-ivb9 piglit]# bin/bufferstorage-persistent read coherent client-storage
-fbo -auto
PIGLIT: {"result": "pass" }
[root at x-ivb9 piglit]# bin/bufferstorage-persistent read coherent client-storage
-fbo -auto
Probe [0] failed. Expected: 17.000000  Observed: 0.000000
Probe [1] failed. Expected: 13.000000  Observed: 0.000000
Probe [3] failed. Expected: 17.000000  Observed: 0.000000
Probe [4] failed. Expected: 18.000000  Observed: 0.000000
Probe [6] failed. Expected: 12.000000  Observed: 0.000000
Probe [7] failed. Expected: 13.000000  Observed: 0.000000
Probe [9] failed. Expected: 12.000000  Observed: 0.000000
Probe [10] failed. Expected: 18.000000  Observed: 0.000000
Probe [12] failed. Expected: 27.000000  Observed: 0.000000
PIGLIT: {"result": "fail" }
[root at x-ivb9 piglit]# bin/bufferstorage-persistent read coherent client-storage
-fbo -auto
Probe [0] failed. Expected: 17.000000  Observed: 0.000000
Probe [1] failed. Expected: 13.000000  Observed: 0.000000
Probe [3] failed. Expected: 17.000000  Observed: 0.000000
Probe [4] failed. Expected: 18.000000  Observed: 0.000000
Probe [6] failed. Expected: 12.000000  Observed: 0.000000
Probe [7] failed. Expected: 13.000000  Observed: 0.000000
Probe [9] failed. Expected: 12.000000  Observed: 0.000000
Probe [10] failed. Expected: 18.000000  Observed: 0.000000
Probe [12] failed. Expected: 27.000000  Observed: 0.000000
PIGLIT: {"result": "fail" }
[root at x-ivb9 piglit]# bin/bufferstorage-persistent read coherent client-storage
-fbo -auto
Probe [0] failed. Expected: 17.000000  Observed: 0.000000
Probe [1] failed. Expected: 13.000000  Observed: 0.000000
Probe [3] failed. Expected: 17.000000  Observed: 0.000000
PIGLIT: {"result": "fail" }


Reproduce steps:
-------------------------
1. xinit
2. bin/bufferstorage-persistent read coherent client-storage -fbo -auto

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