Re: Lost UDP packets
Re: Lost UDP packets
- Subject: Re: Lost UDP packets
- From: Mark Hunt <email@hidden>
- Date: Mon, 27 Sep 2004 15:49:17 +0100
Ok,
A few printf's and some netstat evidence reveals:
The lost packets _are_ being dropped "due to full socket buffers" - the
netstat lost packet count exactly matches the missing packets in my app.
Also, the packet loss occurs around the same packet index every time.
The first lost packet is always about #102, and all remaining packets
of the 160-170 sent are lost.
The socket SO_RCVBUF size is 224k (biggest I can get, and I do read it
back to check), and my packets are 1048 UDP bytes each, so there should
be plenty of room.
These packets are sent as a burst at 30Hz intervals, so there's plenty
of time to empty the buffers.
I don't understand why I'm over-running. It doesn't happen very often
(about once every 3 to 5 seconds) but it should be avoidable.
All machines are Dual 2Gig G5s. The link is 1000baseTX <full-duplex>,
according to ifconfig.
We're using Small Tree Dual gigabit cards to add the extra network to
the receivers. Since they didn't need drivers installing, I assume
Apple's driver is handling the chipset. Where do I go to find it's
plist (sorry for the dumb question)?
Mark
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