nfs client performance

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
---
14:30:01 up 14 days, 2:49, 3 users, load average: 0.00, 0.00, 0.00
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