nfs client performance

[David]

I'm in need of some help.  I have a rhel4 server mounting an nfs share on 
a NetApp filer that is having some serious performance issues.  Not being 
overly familiar with troublshooting nfs, I'm at a wall.  Here are the 
details:

Previous server:
Dell 2650, rhel3, kernel 2.4.something
- no issues

Current server:
Dell 2850, rhel4, kernel 2.6.9
- gig network, e1000 module
- rpciod cpu usage is very high.

here are my nfs mount options:
filer:/vol/exportvol /local/dir    nfs 
tcp,noatime,rsize=32768,wsize=32768,nfsvers=3,hard,intr 0 0

I've been trying to read up on nfs and performance monitoring. Hell, I've 
even ran a few benchmarks.  Here's the problem.  I don't know how to 1) 
read the results and 2) interpret the results to find a solution.

Yes, been reading the nfs performance howto.  Yes, been googling my hiney 
off.  Yes, still flumoxed.

Help?

Thanks,
David

-- 
"I find your lack of faith disturbing."
--Darth Vader
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  14:30:01 up 14 days,  2:49,  3 users,  load average: 0.00, 0.00, 0.00