Date: Fri, 16 Jun 2006 14:13:00 -0500 From: "J.D. Bronson" <jbronson@wixb.com> To: Darrin Chandler <dwchandler@stilyagin.com> Cc: freebsd-questions@freebsd.org Subject: Re: pf + ftp throughput Message-ID: <7.0.1.0.2.20060616141226.00e743b0@sixcompanies.com> In-Reply-To: <20060616191028.GB9804@jeeves.stilyagin.local> References: <7.0.1.0.2.20060616135513.00e743b0@sixcompanies.com> <20060616191028.GB9804@jeeves.stilyagin.local>
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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 > > > > ..it 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 load...so I cant fault the CPU this time.... -JD
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