[Bug 89437] New: [IVB]Piglit/glx_GLX_OML_sync_control_timing_-fullscreen_-divisor_2 sporadically fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89437

            Bug ID: 89437
           Summary: [IVB]Piglit/glx_GLX_OML_sync_control_timing_-fullscree
                    n_-divisor_2 sporadically fails
           Product: Mesa
           Version: unspecified
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: huax.lu at intel.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

System Environment:
--------------------------
Platform: IVB
Libdrm:        
(master)libdrm-2.4.59-32-g080b4929b7452dc1fea32ac1d32e7e571e7fb38b
Mesa:           (master)b77576edc1a8010e5457f82b41c335ae27cb066b
Xserver:       
(master)xorg-server-1.17.0-16-g3a06faf3fcdb7451125a46181f9152e8e59e9770
Xf86_video_intel:  
(master)2.99.917-174-g3e390ec4110519746f2edbb3c38a40f0fc415430
Libva:          (master)f9741725839ea144e9a6a1827f74503ee39946c3
Libva_intel_driver:(master)e8fde1cdaafb93c2b54d6092a728d099ad7cdd11
Kernel:   (drm-intel-nightly)a5217f77503a1089aeb8a9f4e3731e29c1ac2d41

Bug detailed description:
---------------------------
It sporadically fails on IVB with mesa master branch, fail rate:1/10

output:
libGL: OpenDriver: trying /opt/X11R7/lib/dri/tls/i965_dri.so
libGL: OpenDriver: trying /opt/X11R7/lib/dri/i965_dri.so
Wallclock time between MSCs 16716.000000us does not match glXGetMscRateOML
16665.600000us
PIGLIT: {"result": "fail" }

==Reproduce steps==
---------------------------- 
1. xinit
2. ./bin/glx-oml-sync-control-timing -fullscreen -divisor 2 -auto

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