[Bug 772841] New: udpsrc: high CPU usage at high packet rate

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=772841

            Bug ID: 772841
           Summary: udpsrc: high CPU usage at high packet rate
    Classification: Platform
           Product: GStreamer
           Version: 1.8.3
                OS: Linux
            Status: NEW
          Severity: major
          Priority: Normal
         Component: gst-plugins-good
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: brain at jikos.cz
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

A simple pipeline:

gst-launch-1.0 udpsrc uri="udp://224.100.1.1:5004" ! fakesink

is causing 30% CPU usage on a Cortex A7 @528MHz at 1000 packets/second

Such a high CPU usage is unacceptable, especially if a C program doing the same
- reading from a socket and discarding the data - needs just 3-4% CPU

This use case is crucial for handling low latency audio.

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