[Mesa-dev] [Bug 103732] swr often gets stuck in piglit's glx-multi-context-single-window test

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103732

            Bug ID: 103732
           Summary: swr often gets stuck in piglit's
                    glx-multi-context-single-window test
           Product: Mesa
           Version: 17.2
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Other
          Assignee: mesa-dev at lists.freedesktop.org
          Reporter: agomez at igalia.com
        QA Contact: mesa-dev at lists.freedesktop.org

For some time now, when running the complete "all" profile in piglit against
mesa's swr driver, the glx-multi-context-single-window often gets stuck in an
infinite loop using 100% CPU and needs to be killed.

This doesn't happen always, but quite often.

Piglit report is as follows:


Detail      |   Value
------------+---------------
Returncode  |   -15
------------+---------------
Time        |   9:34:48.086238
------------+---------------
Stdout      |
------------+---------------
Stderr      | SWR detected AVX2 
            | vert shader  0x7f65e7e39000
            | frag shader  0x7f65e7e37000
            | fetch shader 0x7f65e7e35000
            | vert shader  0x7f65e7e33000
            | frag shader  0x7f65e7e31000
            | fetch shader 0x7f65e7e35000
            | vert shader  0x7f65e7c42000
            | frag shader  0x7f65e7c40000
            | fetch shader 0x7f65e7e35000
            | vert shader  0x7f65e7c3e000
            | frag shader  0x7f65c218a000
            | fetch shader 0x7f65e7e35000
            | vert shader  0x7f65c20fe000
            | frag shader  0x7f65c20fc000
            | fetch shader 0x7f65e7e35000
            | vert shader  0x7f65c2070000
            | frag shader  0x7f65c206e000
            | fetch shader 0x7f65e7e35000
            | vert shader  0x7f65c1fe2000
            | frag shader  0x7f65c1fe0000
            | fetch shader 0x7f65e7e35000
            | vert shader  0x7f65c1f54000
            | frag shader  0x7f65c1f52000
            | fetch shader 0x7f65e7e35000
------------+---------------
Environment | PIGLIT_PLATFORM="mixed_glx_egl"
PIGLIT_SOURCE_DIR="/home/local/piglit"
------------+---------------
Command     | /home/local/piglit/bin/glx-multi-context-single-window -auto
dmesg   
----------------------------

Environment is an Ubuntu Xenial with custom LLVM packages installed and locally
compiled mesa and mesa dependencies. If needed, I can provide a docker image
with which to test.

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