Re: Networking performance in 2.0 vs. 2.[23]

From: Stephen Frost (sfrost@ns.snowman.net)
Date: Wed May 17 2000 - 13:36:46 EST


On Wed, 17 May 2000, Ivan Passos wrote:

> 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!!

        Uhh, backport all the 2.2.x kernel changes? Or just rename '2.2'
to '2.0' and have yourself a ball? Is there a reason you don't just upgrade to
a stable 2.2.x kernel?

                Stephen

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