Date: Fri, 30 Nov 2001 13:47:41 -0500 (EST) From: Andrew Gallatin <gallatin@cs.duke.edu> To: freebsd-hackers@freebsd.org Subject: Re: TCP Performance Graphs Message-ID: <15367.54349.876429.742833@grasshopper.cs.duke.edu> In-Reply-To: <20011130125839.A88302@ussenterprise.ufp.org> References: <20011130125839.A88302@ussenterprise.ufp.org>
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Leo Bicknell writes: > 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. 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
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