Re: major network performance difference between 2.4 and 2.6.2-rc2

David S. Miller
2004-02-04T21:11:03Z

On Wed, 4 Feb 2004 12:54:44 -0800
Andrew Morton <akpm@osdl.org> wrote:

> Jim Faulkner <jfaulkne@ccs.neu.edu> wrote:
> > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> > 3 root 35 19 0 0 0 S 45.9 0.0 0:46.98 ksoftirqd/0
> > 6 root 5 -10 0 0 0 S 43.3 0.0 1:56.63 events/0
> > 12008 dogshu 15 0 4800 2356 3828 S 5.3 0.2 0:05.98 proftpd
> > 12 root 15 0 0 0 0 S 0.3 0.0 0:00.41 pdflush
> > 9778 root 16 0 5888 1724 5516 R 0.3 0.2 0:00.12 sshd
> >
> > the load before that network transfer was 0.01, and the load after the
> > network transfer was 1.45.
>
> Could be a networking problem, but boy that's a lot of CPU time.

Andrew maybe something bolixed in the MAX_SOFTIRQ_RESTART stuff
we put into kernel/softirq.c? Just a guess...