[Bug 97489] High latency using GL_FEEDBACK mode

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97489

            Bug ID: 97489
           Summary: High latency using GL_FEEDBACK mode
           Product: Mesa
           Version: 11.0
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: sancelot at free.fr
        QA Contact: intel-3d-bugs at lists.freedesktop.org

Created attachment 126049
  --> https://bugs.freedesktop.org/attachment.cgi?id=126049&action=edit
stops when glRenderMode has high latency test case

Hi,

for unknown reasons I noticed my GL application was very slow after migrating
to recent platforms.

after dissection of application, I found that has happened when using
GL_FEEDBACK rendermode. 

Sometime, it takes very long time. I made a single testcase app that monitors
time spent in it to reproduce the problem.

Regards
steph

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