Nouveau - Jan 2016 - [Bug 93573] New: bad performance with 4k h264 video

https://bugs.freedesktop.org/show_bug.cgi?id=93573

            Bug ID: 93573
           Summary: bad performance with 4k h264 video
           Product: xorg
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau at lists.freedesktop.org
          Reporter: freedesktop at karolherbst.de
        QA Contact: xorg-team at lists.x.org

I noticed a while back already, that nouveau handles 4k video not that well
currently.

I tried it out with the cactus-4k video from here:
http://www.elementaltechnologies.com/resources/4k-test-sequences

Nvidia doesn't have any problem playing that video at full speed, but on my
kepler nve6 card even full reclocked nouveau only handles this at 45% speed and
the PVLD engine is at max load (only around 80% with nvidia)

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https://bugs.freedesktop.org/show_bug.cgi?id=93573

--- Comment #1 from Karol Herbst <freedesktop at karolherbst.de> ---
Created attachment 120787
  --> https://bugs.freedesktop.org/attachment.cgi?id=120787&action=edit
screenshot of the video

also I noticed that the output is total garbage. so I assume something else is
fishy here.

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--- Comment #2 from Karol Herbst <freedesktop at karolherbst.de> ---
Created attachment 120788
  --> https://bugs.freedesktop.org/attachment.cgi?id=120788&action=edit
debug output of mesa

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--- Comment #3 from Karol Herbst <freedesktop at karolherbst.de> ---
Created attachment 120789
  --> https://bugs.freedesktop.org/attachment.cgi?id=120789&action=edit
crash while playing reencoded video

I just reencoded this video just to test if special encoding flags would let
nouveau play that video, but I got a crash instead

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--- Comment #4 from Karol Herbst <freedesktop at karolherbst.de> ---
side note: slightly smaller videos (3840x2100) are working much better, so
maybe there is only a tiny issue somewhere

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Karol Herbst <freedesktop at karolherbst.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #5 from Karol Herbst <freedesktop at karolherbst.de> ---
fixed in current mesa master

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