[eepro100] Re: [NFS] General network slowness on SIS 530 with eepro100
Christian Reis
kiko@async.com.br
Thu Aug 15 19:41:01 2002
On Wed, Aug 14, 2002 at 03:13:55AM +0200, Trond Myklebust wrote:
> >>>>> " " == Christian Reis <kiko@async.com.br> writes:
>
> > Helle there,
>
> > I've been, for the past days, setting up a fairly big diskless
> > network based on Linux. I've chosen to use 2.4.19 as the kernel
> > because there were some hardware requirements, and for most of
> > the newer boxes, it runs fine. However, for three of the older
> > boxes, we have had some pretty odd performance and stability
> > issues. This message is about the latest one, which is an ASUS
> > P5S-B (has the infamous SIS 530 chipset) on an intel eepro100
> > card. Details:
>
> Is all this NFS over UDP? If so, numbers should not really have
> changed in 2.4.19 ( - yes my patchset changes things, but stock 2.4.19
> should not be too different w.r.t 2.4.18)
Trond, I've been looking at this a bit more. I've tried 2.4.18 and
2.2.21 and nothing changes - it always looks bad. If I look at top
output for
time dd if=/dev/zero of=TESTFILE count=3000 bs=100k
rpciod is around 60% of CPU and there is 0% idle. A typical vmstat line
is:
procs memory swap io system cpu
r b w swpd free buff cache si so bi bo in cs us sy id
1 0 0 0 16228 4 197316 0 0 0 0 1426 603 14 86 0
Now, I contrast this to the other box (same CPU speed, other mobo):
procs memory swap io system cpu
r b w swpd free buff cache si so bi bo in cs us sy id
0 1 0 0 196216 0 53656 0 0 0 0 103 9 0 0 100
I see rpciod running, but very rarely. So any idea why rpciod would be
running and burning up CPU a lot in the first case, but not in the
second? Maybe I need a kernel profiler to go after the actual problem?
Take care,
--
Christian Reis, Senior Engineer, Async Open Source, Brazil.
http://async.com.br/~kiko/ | [+55 16] 261 2331 | NMFL