[Bug 94490] bin/bufferstorage-persistent read client-storage piglit test fails intermittently

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94490

            Bug ID: 94490
           Summary: bin/bufferstorage-persistent read client-storage
                    piglit test fails intermittently
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: siglesias at igalia.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

Hello,

"bufferstorage-persistent read client-storage" piglit test fails intermittently
with a very low fail-to-pass ratio in Mesa master.

When running "bufferstorage-persistent read client-storage" piglit test during
20/30 minutes in an infinite loop on a Haswell laptop, I got the following
error:

$ while (true); do (bin/bufferstorage-persistent read client-storage -auto -fbo
| grep -v pass); done
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
Probe [15] failed. Expected: 27.000000  Observed: 0.000000
Probe [16] failed. Expected: 18.000000  Observed: 0.000000
Probe [18] failed. Expected: 22.000000  Observed: 0.000000
Probe [19] failed. Expected: 13.000000  Observed: 0.000000
Probe [21] failed. Expected: 22.000000  Observed: 0.000000
Probe [22] failed. Expected: 18.000000  Observed: 0.000000
Probe [24] failed. Expected: 37.000000  Observed: 0.000000
Probe [25] failed. Expected: 13.000000  Observed: 0.000000
Probe [27] failed. Expected: 37.000000  Observed: 0.000000
Probe [28] failed. Expected: 18.000000  Observed: 0.000000
Probe [30] failed. Expected: 32.000000  Observed: 0.000000
Probe [31] failed. Expected: 13.000000  Observed: 0.000000
Probe [33] failed. Expected: 32.000000  Observed: 0.000000
Probe [34] failed. Expected: 18.000000  Observed: 0.000000
Probe [36] failed. Expected: 47.000000  Observed: 0.000000
Probe [37] failed. Expected: 13.000000  Observed: 0.000000
Probe [39] failed. Expected: 47.000000  Observed: 0.000000
Probe [40] failed. Expected: 18.000000  Observed: 0.000000
Probe [42] failed. Expected: 42.000000  Observed: 0.000000
Probe [43] failed. Expected: 13.000000  Observed: 0.000000
Probe [45] failed. Expected: 42.000000  Observed: 0.000000
Probe [46] failed. Expected: 18.000000  Observed: 0.000000
PIGLIT: {"result": "fail" }

HW/SW info
---

CPU: Intel(R) Core(TM) i5-4210M CPU
GPU: Intel® HD Graphics 4600, Intel Haswell Mobile (GT2)
Linux kernel version: 4.2.0-30-generic (Ubuntu 15.10)
Mesa HEAD: f8ea98e4ec4078924f79b0aadd2754726b835f5c
Piglit HEAD: 1d83558d4bef6e0cd05b1cf167c2bf63ac6b3b92


How to reproduce it
---

* Run the following command:

$ while (true); do (bin/bufferstorage-persistent read client-storage -auto -fbo
| grep -v pass); done

* Wait between 30 minutes to see the errors in the output.

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