Date: Fri, 30 Nov 2001 17:10:02 -0500 (EST) From: Kenneth Wayne Culver <culverk@wam.umd.edu> To: trim_your_ccs@loopback.net Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: TCP Performance Graphs Message-ID: <Pine.GSO.4.21.0111301709320.9908-100000@rac4.wam.umd.edu> In-Reply-To: <15367.54349.876429.742833@grasshopper.cs.duke.edu>
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> > The question that immediately comes to mind is, why not simply use > > as big a value as possible? The problem comes down to buffering > > the data, and busy servers may have to buffer a lot of data. Having > > a 1 meg window size may have you buffer 1 meg per connection. Note > > that FreeBSD's current buffer management is particularly stupid in > > that it will _always_ buffer 1 Meg, need it or not. Until we fix > > this we need an interim solution. > > > > I thought that I heard a few months ago that Matt Dillon was looking > at ways to dynamically size tcp windows from within the kernel. Maybe > I'm on crack. You're not on crack, I don't know if it was Matt Dillon, but someone was doing this, I was using the patches for about a month to test them out. Ken > > Maybe we should look at the Dynamic Righsizing work being done at > LANL. See "Dynamic Adjustment of TCP Window Sizes" and > "Dynamic Right-Sizing: A Simulation Study" at > http://public.lanl.gov/radiant/publications.html > > Cheers, > > Drew > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-hackers" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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