[Bug 94596] New: xserver-1.18.2 uses one core fully with dri3

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94596

            Bug ID: 94596
           Summary: xserver-1.18.2 uses one core fully with dri3
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/AMDgpu
          Assignee: xorg-driver-ati at lists.x.org
          Reporter: lordheavym at gmail.com
        QA Contact: xorg-team at lists.x.org

Created attachment 122381
  --> https://bugs.freedesktop.org/attachment.cgi?id=122381&action=edit
perf file with "perf record --pid <xorg>"

- xserver-1.18.2
- xf86-video-amdgpu-1.0.1 (same problem with git)
- linux kernel-4.5.0

afaik it was working with xserver-1.18.1, back to normal when dri3 is disabled.
Joined file is recorded with perf.

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