[Bug 796455] New: using rtspsrc with tcp has a much higher CPU usage then with udp

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=796455

            Bug ID: 796455
           Summary: using rtspsrc with tcp has a much higher CPU usage
                    then with udp
    Classification: Platform
           Product: GStreamer
           Version: 1.14.0
                OS: Linux
            Status: NEW
          Severity: major
          Priority: Normal
         Component: gst-plugins-good
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: ivan.roubicek at gmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

When using rtspsrc with tcp protocol it has a much larger CPU usage then with
UDP. I was trying that with gstreamer 1.12.4 (ubuntu 17.10) and 1.14.0 (ubuntu
18.04 LTS)

htop using tcp:
  PID USER      PRI  NI  VIRT   RES   SHR S CPU% MEM%   TIME+  Command
14679 servis     20   0  961M 12636 10280 S  8.0  0.1  0:01.00 gst-launch-1.0
rtspsrc protocols=tcp location=rtsp://192.168.0.1:554/ ! fakesink
14680 servis     20   0  961M 12636 10280 S  0.0  0.1  0:00.00 gst-launch-1.0
rtspsrc protocols=tcp location=rtsp://192.168.0.1:554/ ! fakesink
14681 servis     20   0  961M 12636 10280 S  0.0  0.1  0:00.00 gst-launch-1.0
rtspsrc protocols=tcp location=rtsp://192.168.0.1:554/ ! fakesink
14682 servis     20   0  961M 12636 10280 S  8.0  0.1  0:00.95 gst-launch-1.0
rtspsrc protocols=tcp location=rtsp://192.168.0.1:554/ ! fakesink
14683 servis     20   0  961M 12636 10280 S  0.0  0.1  0:00.00 gst-launch-1.0
rtspsrc protocols=tcp location=rtsp://192.168.0.1:554/ ! fakesink
14684 servis     20   0  961M 12636 10280 S  0.0  0.1  0:00.00 gst-launch-1.0
rtspsrc protocols=tcp location=rtsp://192.168.0.1:554/ ! fakesink
14685 servis     20   0  961M 12636 10280 S  0.0  0.1  0:00.00 gst-launch-1.0
rtspsrc protocols=tcp location=rtsp://192.168.0.1:554/ ! fakesink
14686 servis     20   0  961M 12636 10280 S  0.0  0.1  0:00.00 gst-launch-1.0
rtspsrc protocols=tcp location=rtsp://192.168.0.1:554/ ! fakesink
14687 servis     20   0  961M 12636 10280 S  0.0  0.1  0:00.00 gst-launch-1.0
rtspsrc protocols=tcp location=rtsp://192.168.0.1:554/ ! fakesink
14688 servis     20   0  961M 12636 10280 S  0.0  0.1  0:00.00 gst-launch-1.0
rtspsrc protocols=tcp location=rtsp://192.168.0.1:554/ ! fakesink
14690 servis     20   0  961M 12636 10280 S  0.0  0.1  0:00.00 gst-launch-1.0
rtspsrc protocols=tcp location=rtsp://192.168.0.1:554/ ! fakesink
14691 servis     20   0  961M 12636 10280 S  0.0  0.1  0:00.00 gst-launch-1.0
rtspsrc protocols=tcp location=rtsp://192.168.0.1:554/ ! fakesink

htop using udp:
  PID USER      PRI  NI  VIRT   RES   SHR S CPU% MEM%   TIME+  Command
14707 servis     20   0 1251M 12916 10576 S  0.0  0.1  0:00.08 gst-launch-1.0
rtspsrc protocols=udp location=rtsp://192.168.0.1:554/ ! fakesink
14708 servis     20   0 1251M 12916 10576 S  0.0  0.1  0:00.02 gst-launch-1.0
rtspsrc protocols=udp location=rtsp://192.168.0.1:554/ ! fakesink
14709 servis     20   0 1251M 12916 10576 S  0.0  0.1  0:00.00 gst-launch-1.0
rtspsrc protocols=udp location=rtsp://192.168.0.1:554/ ! fakesink
14710 servis     20   0 1251M 12916 10576 S  0.0  0.1  0:00.00 gst-launch-1.0
rtspsrc protocols=udp location=rtsp://192.168.0.1:554/ ! fakesink
14711 servis     20   0 1251M 12916 10576 S  0.0  0.1  0:00.01 gst-launch-1.0
rtspsrc protocols=udp location=rtsp://192.168.0.1:554/ ! fakesink
14712 servis     20   0 1251M 12916 10576 S  0.0  0.1  0:00.00 gst-launch-1.0
rtspsrc protocols=udp location=rtsp://192.168.0.1:554/ ! fakesink
14713 servis     20   0 1251M 12916 10576 S  0.0  0.1  0:00.00 gst-launch-1.0
rtspsrc protocols=udp location=rtsp://192.168.0.1:554/ ! fakesink
14714 servis     20   0 1251M 12916 10576 S  0.0  0.1  0:00.00 gst-launch-1.0
rtspsrc protocols=udp location=rtsp://192.168.0.1:554/ ! fakesink
14715 servis     20   0 1251M 12916 10576 S  0.0  0.1  0:00.00 gst-launch-1.0
rtspsrc protocols=udp location=rtsp://192.168.0.1:554/ ! fakesink
14716 servis     20   0 1251M 12916 10576 S  0.0  0.1  0:00.00 gst-launch-1.0
rtspsrc protocols=udp location=rtsp://192.168.0.1:554/ ! fakesink
14717 servis     20   0 1251M 12916 10576 S  0.0  0.1  0:00.00 gst-launch-1.0
rtspsrc protocols=udp location=rtsp://192.168.0.1:554/ ! fakesink
14718 servis     20   0 1251M 12916 10576 S  0.0  0.1  0:00.00 gst-launch-1.0
rtspsrc protocols=udp location=rtsp://192.168.0.1:554/ ! fakesink
14719 servis     20   0 1251M 12916 10576 S  0.3  0.1  0:00.02 gst-launch-1.0
rtspsrc protocols=udp location=rtsp://192.168.0.1:554/ ! fakesink
14720 servis     20   0 1251M 12916 10576 S  0.0  0.1  0:00.00 gst-launch-1.0
rtspsrc protocols=udp location=rtsp://192.168.0.1:554/ ! fakesink
14722 servis     20   0 1251M 12916 10576 S  0.0  0.1  0:00.00 gst-launch-1.0
rtspsrc protocols=udp location=rtsp://192.168.0.1:554/ ! fakesink
14723 servis     20   0 1251M 12916 10576 S  0.0  0.1  0:00.00 gst-launch-1.0
rtspsrc protocols=udp location=rtsp://192.168.0.1:554/ ! fakesink

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