[Bug 80840] New: [byt] Command parser causes huge latency spikes and severe throughput degradation - major UX impact

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=80840

          Priority: medium
            Bug ID: 80840
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [byt] Command parser causes huge latency spikes and
                    severe throughput degradation - major UX impact
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: blocker
    Classification: Unclassified
                OS: All
          Reporter: chris at chris-wilson.co.uk
          Hardware: Other
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Intel
           Product: DRI

x11perf, firefox, cairo, moving windows are all slow (orders of magnitude) and
judders. Even other compute tasks and remote access is slow and shows latency
spikes. It's horrible.

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