Networking performance in 2.0 vs. 2.[23]

From: Ivan Passos (lists@cyclades.com)
Date: Wed May 17 2000 - 13:12:45 EST


Hello,

I'm testing the Cyclades-PC300 card (our syncrhonous card) in several
different kernels (2.0.38, 2.2.15 and 2.3.99-pre8) and I've seen an
interesting behavior that I'd like you guys to comment on.

In 2.2 and 2.3, if I do 'ping -f' through 3 different PC300 interfaces at
4Mbps each, I get packet loss rates of around 6%. If I do just one
interface at a time, I get packet loss rates of 1-2%.

In 2.0, however, it's completely different!! If I do 'ping -f' through 3
different PC300 interfaces at 4Mbps each, I get packet loss rates of
around 70%!! If I do just one interface at a time, I get packet loss rates
of 0%!!

Can anyone tell me the reason for that?? Is this a known behavior /
problem?? What could I do to make the 2.0 behavior closer to the 2.[23]
behavior (which is much more scalable ...)??

Thanks in advance for your answers!!

Regards,
Ivan

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