Subject: Re: about UDP tests
To: Eric Auge <email@example.com>
From: Timo Schoeler <firstname.lastname@example.org>
Date: 05/12/2005 16:12:02
thus Eric Auge spake:
> Ok here is another thought :
> after some more measurements, and 2 box connected w/ a crosscable,
> I had a really strange big loss of a thousand packets, that are not
> reported even in the internal counters (systat inet.ip 1 :run).
> sending 10 000 000 udp packets at 40 000 p/s rate :
> I'm speaking about internal counters only :
> sender reports 10 000 000 packets sent
> received reports 9 993 728 (missing 6272)
> and my udp server test code reports
> 6272 missing.
> It doesn't happend all the time, just since i'm stress testing.
> is it possible that the nic card drops packets before passing to the
> driver ? like too much interrupts etc.. ?(that would explain the
> "missing" number in internal counters) ?.
> the nic card used on the server side is a realtek (rtk0).
AFAIK rtk-based NICs are meant to be... er... not so good.
can you try with fxp or another known-good chipset?
just a thought...
Timo Schoeler | http://macfinity.net/~tis | email@example.com
//macfinity -- finest IT services | http://macfinity.net
Key fingerprint = F844 51BE C22C F6BD 1196 90B2 EF68 C851 6E12 2D8A
There are 10 types of people in the world. Those who understand binary
and those who don't.