From owner-freebsd-hackers Thu Nov 29 17:42:52 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from ussenterprise.ufp.org (ussenterprise.ufp.org [208.185.30.210]) by hub.freebsd.org (Postfix) with ESMTP id 7918437B405 for ; Thu, 29 Nov 2001 17:42:46 -0800 (PST) Received: (from bicknell@localhost) by ussenterprise.ufp.org (8.11.1/8.11.1) id fAU1gP364310; Thu, 29 Nov 2001 20:42:25 -0500 (EST) (envelope-from bicknell) Date: Thu, 29 Nov 2001 20:42:25 -0500 From: Leo Bicknell To: Pierre Beyssac Cc: Josh Paetzel , jc@irbs.com, freebsd-hackers@FreeBSD.ORG Subject: Re: FreeBSD performing worse than Linux? Message-ID: <20011129204225.A63957@ussenterprise.ufp.org> Mail-Followup-To: Pierre Beyssac , Josh Paetzel , jc@irbs.com, freebsd-hackers@FreeBSD.ORG References: <20011128153817.T61580@monorchid.lemis.com> <15364.38174.938500.946169@caddis.yogotech.com> <20011129004234.A16101@exuma.irbs.com> <20011130010354.A21307@fasterix.frmug.org> <20011129184414.F522@twincat.vladsempire.net> <20011130022547.A21889@fasterix.frmug.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <20011130022547.A21889@fasterix.frmug.org>; from pb@fasterix.freenix.org on Fri, Nov 30, 2001 at 02:25:47AM +0100 Organization: United Federation of Planets Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Fri, Nov 30, 2001 at 02:25:47AM +0100, Pierre Beyssac wrote: > What is the value of net.inet.tcp.sendspace on the server? It's 16K > on -stable, it should be very interesting to try and increase it > to 32K or 64K, it makes a lot difference on high bw*delay links. *grumble* I'll try to avoid my tirade. 16K _will cause problems for virtually all users_. You can do the math and see it won't keep a T1 full across country. Now that I understand the issues with increasing it I see why we can't go to real values (eg 256k) because FreeBSD's buffer management isn't up to the task. This default _really_ needs to be moved to 32k, with an increase in default MBUF's. Machines have enough RAM, and it will allow people to fill their home DSL connections. It also puts FreeBSD on par with other OS's. I also think we need to support some of the work on buffer management schemes to be able to do something even better. -- Leo Bicknell - bicknell@ufp.org - CCIE 3440 PGP keys at http://www.ufp.org/~bicknell/ Read TMBG List - tmbg-list-request@tmbg.org, www.tmbg.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message