Re: bdflush/rpciod high CPU utilization, profile does not make sense

Jakob Oestergaard
2005-04-11T13:47:10Z

On Mon, Apr 11, 2005 at 08:35:39AM -0400, Trond Myklebust wrote:
...
> That certainly shouldn't be the case (and isn't on any of my setups). Is
> the behaviour identical same on both the PIII and the Opteron systems?

The dual opteron is the nfs server

The dual athlon is the 2.4 nfs client

The dual PIII is the 2.6 nfs client

> As for the WRITE rates, could you send me a short tcpdump from the
> "sequential write" section of the above test? Just use "tcpdump -s 90000
> -w binary.dmp" just for a couple of seconds. I'd like to check the
> latencies, and just check that you are indeed sending unstable writes
> with not too many commit or getattr calls.

Certainly;

http://unthought.net/binary.dmp.bz2

I got an 'invalid snaplen' with the 90000 you suggested, the above dump
is done with 9000 - if you need another snaplen please just let me know.

A little explanation for the IPs you see;
sparrow/10.0.1.20 - nfs server
raven/10.0.1.7 - 2.6 nfs client
osprey/10.0.1.13 - NIS/DNS server

Thanks,

--

/ jakob