[Bug 65115] New: [sna ivb] rendering is getting painfully slow sometimes

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=65115

          Priority: medium
            Bug ID: 65115
          Assignee: chris at chris-wilson.co.uk
           Summary: [sna ivb] rendering is getting painfully slow
                    sometimes
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: jirislaby at gmail.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: Driver/intel
           Product: xorg

Created attachment 79937
  --> https://bugs.freedesktop.org/attachment.cgi?id=79937&action=edit
xorg.log

I use opengl+KDE4 and when some effects are performed, it stutters a bit. So I
enabled FPS "effect" and it shows 60 FPS and a dropdown to 20 or less when I
move windows, move with sliders in windows, minimize etc. There are red or even
black peaks in the FPS effect.

This happens after some uptime I believe. If I run a new X while the stuttering
is still running (by creating a new session), the new one works fine (60 FPS,
no peaks). Is there any way to find out what is going on?

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