[Bug 786054] New: mapping vaapi buffer slow

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=786054

            Bug ID: 786054
           Summary: mapping vaapi buffer slow
    Classification: Platform
           Product: GStreamer
           Version: 1.10.4
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gstreamer-vaapi
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: frank.huber at barco.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
                CC: bsreerenj at gmail.com, vjaquez at igalia.com
     GNOME version: ---

If the number of decoded videos increase, the time-span of gst_buffer_map()
increases dramatically.

With 16 h264 full HD videos each mapping needs more than 16 ms.

We map the buffer to copy the video data. The copy itself needs only 1 ms.

We assume the increase of the mapping time is a bug, maybe a concurrency issue.
Maybe inside intel vaapi driver, not the gstreamer code.


setup
intel core i7
GStreamer 1.10.4
libva 1.8.2
libva intel driver 1.8.2

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