Re: BUG: Slowdown on 3000 socket-machines tracked down

From: Andrew Morton
Date: Thu Mar 10 2005 - 00:32:08 EST

Christian Schmid <webmaster@xxxxxxxxxxxxxx> wrote:
> > So, maybe a VM problem? That would be a good place to focus since
> > I think we can be fairly certain it isn't a problem in just the
> > networking code. Otherwise, my tests would show lower bandwidth.
> Thanks to your tests I am really sure that its no network-code problem anymore. But what I THINK it
> is: The network is allocating buffers dynamically and if the vm doesnt provide that buffers fast
> enough, it locks as well.

Did anyone have a 100-liner which demonstrates this problem?

The output of `vmstat 1' when the thing starts happening would be interesting.
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