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

[GStreamer (GNOME Bugzilla)]

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

Nicolas Dufresne (stormer) <nicolas at ndufresne.ca> changed:

           What    |Removed                     |Added
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                 CC|                            |nicolas at ndufresne.ca

--- Comment #21 from Nicolas Dufresne (stormer) <nicolas at ndufresne.ca> ---
(In reply to Petr Kulhavy from comment #20)
> I have been looking at recvmmsg(). But the timeout seems to be buggy:
> 
> man recvmmsg:
> "BUGS: The timeout argument does not work as intended.  The timeout is
> checked only after the receipt of each datagram, so that if up to vlen-1
> datagrams are received before the timeout expires, but then no further
> data‐grams are received, the call will block forever."
> 
> So I'm afraid it is useless :-(

Not totally true. When using it non-blocking, you can first poll, and then you
call recvmmsg with N messages allocated. As it's non blocking, it will give you
back M messages (where M <= N). You don't need to use the timeout.

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