Date: Mon, 21 May 2007 11:52:24 -0700 From: security <security@jim-liesl.org> To: Tom Judge <tom@tomjudge.com> Cc: freebsd-net@freebsd.org Subject: Re: asymetric speeds over gigE link Message-ID: <4651EA68.7010001@jim-liesl.org> In-Reply-To: <4651E74A.2080202@tomjudge.com> References: <4651DB6E.5090102@jim-liesl.org> <4651E74A.2080202@tomjudge.com>
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Tom Judge wrote: > Have you tried upping the MTU, that is if the cards and switch you are > using support it. I have seen significant speed increases (FreeBSD - > FreeBSD) in some scenario's twice the through put with an MTU of 8192. > > I have also seen 700Mb/s sustained FreeBSD - FreeBSD using the openssh > HPN patch set and no extra tuning of the network stack. Which makes > me think that maybe the linux stack needs some tuning? > > Just some ideas > > Tom Thanks Tom. I played with "jumbo's", but the switch didn't seem to like it. I'll also chase this from the linux side too. I may be able to bring up a scratch box with 6.2, and see what freebsd <-> freebsd perf seems like. jim
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