In the last episode (May 19), Dmitry Samersoff said:
> On 18-May-2000 Travis Cole wrote:
> > On Wed, May 17, 2000 at 05:51:59PM +0400, Dmitry Samersoff wrote:
> >> I have traffic metering program using bpf, it works fine on
> >> relatevly free net but looses about 30% of packets on havy loaded
> >> one.
> >
> > Are you doing dns lookups? Don't do those and you may fix your problem.
>
> Thanks for all. I tryed all usual solution (change CPU, bring packet
> parsing out of reading thread and so on.) and now
Define "heavily loaded". If you just run "tcpdump -n" for a couple
minutes and hit ^C, does it report any dropped packets? If it does,
then your machine probably isn't fast enough to handle the network
load. If I flood my 100mbit network with small packets, and monitor it
on a P6/200 with "tcpdump -n", I drop from 1-10% of the packets. If I
use "tcpdump -n -w logfile.txt", I drop no packets.
--
Dan Nelson
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