Date: Wed, 28 Nov 2001 09:15:11 -0600 From: Jonathan Lemon <jlemon@flugsvamp.com> To: Nate Williams <nate@yogotech.com> Cc: Poul-Henning Kamp <phk@critter.freebsd.dk>, Greg Lehey <grog@lemis.com>, developers@FreeBSD.org, FreeBSD Hackers <hackers@FreeBSD.org> Subject: Re: FreeBSD performing worse than Linux? Message-ID: <20011128091511.A75389@prism.flugsvamp.com> In-Reply-To: <15364.38767.82340.347344@caddis.yogotech.com> References: <15364.38174.938500.946169@caddis.yogotech.com> <25429.1006933507@critter.freebsd.dk> <15364.38767.82340.347344@caddis.yogotech.com>
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On Wed, Nov 28, 2001 at 12:51:11AM -0700, Nate Williams wrote: > > >Note, some of the performance issues were made better by disabling the > > >TCP newreno implementation, but it's still poor and very inconsistent > > >for hosts not on the local network, while the Linux box next to it gets > > >much more consistent results. > > > > For what it's worth I have disabled newreno at my customer sites as well > > and felt and heard less "bogosity" since. > > It's actually pretty awful. However, even with the fix I merged back > into RELENG_4, the performance with/without newreno is still *much* > worse (in terms of consistantly giving the same results) than the code > in FreeBSD 3.x. > > The interesting thing is that the application that's getting the most > press is one of our field technicians downloading a file over anonymous > ftp by hand, so it's not like we're generating tons of traffic, or > alot of parallel connections. > > The connections hang, abort, and those that complete have numbers that > are *all* over the map. However, when connected to a Linux box on the > same network, none of these bad things occur. :( Please, please provide information and dumps! To be honest, this is the first I've heard about bad network performance, (other than the NewReno issue), and I would really appreciate raw tcpdumps to analyze. -- Jonathan To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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