Re: [NFS] General network slowness on SIS 530 with eepro100
Christian Reis <[email protected]>
| Newsgroups | gmane.linux.drivers.eepro100.devel |
|---|---|
| Message-ID | <[email protected]> |
On Wed, Aug 14, 2002 at 03:13:55AM +0200, Trond Myklebust wrote: > >>>>> " " == Christian Reis <[email protected]> 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