Date: Fri, 16 Jun 2006 12:10:28 -0700 From: Darrin Chandler <dwchandler@stilyagin.com> To: "J.D. Bronson" <jbronson@wixb.com> Cc: freebsd-questions@freebsd.org Subject: Re: pf + ftp throughput Message-ID: <20060616191028.GB9804@jeeves.stilyagin.local> In-Reply-To: <7.0.1.0.2.20060616135513.00e743b0@sixcompanies.com> References: <7.0.1.0.2.20060616135513.00e743b0@sixcompanies.com>
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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. -- Darrin Chandler | Phoenix BSD Users Group dwchandler@stilyagin.com | http://bsd.phoenix.az.us/ http://www.stilyagin.com/ |
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