pf + ftp throughput

J.D. Bronson jbronson at
Fri Jun 16 19:13:01 UTC 2006

At 02:10 PM 6/16/2006, Darrin Chandler wrote:
>On Fri, Jun 16, 2006 at 01:59:01PM -0500, J.D. Bronson wrote:
> > For example...moving a 50MB file:
> >
> > 'keep state' = 11-12MB/sec over 100MB-FDX
> > 'modulate state = 6-7MB/sec over 100MB-FDX
> >
> > took me a while to determine the culprit here - but I am curious
> > as to why this is the case?
>Since modulate state substitues its own high quality random sequence for
>the TCP stream in both directions, a wimpy CPU or similar problem could
>easily cause this, I think. Still, I'm surprised to see a 50% hit from
>using modulate state.

Yes. I am too!
This is a P4-3.06 with 1GB ram...under almost no I cant 
fault the CPU this time....


More information about the freebsd-questions mailing list