From owner-freebsd-net Tue Oct 15 15:56:57 2002 Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 6725337B401 for ; Tue, 15 Oct 2002 15:56:56 -0700 (PDT) Received: from 66-162-33-178.gen.twtelecom.net (66-162-33-178.gen.twtelecom.net [66.162.33.178]) by mx1.FreeBSD.org (Postfix) with ESMTP id 1E21243E4A for ; Tue, 15 Oct 2002 15:56:56 -0700 (PDT) (envelope-from steve@expertcity.com) Received: from [10.4.2.41] (helo=expertcity.com) by 66-162-33-178.gen.twtelecom.net with esmtp (Exim 3.22 #4) id 181acR-0005fG-00; Tue, 15 Oct 2002 15:56:55 -0700 Message-ID: <3DAC9D37.7060701@expertcity.com> Date: Tue, 15 Oct 2002 15:56:55 -0700 From: Steve Francis User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.2a) Gecko/20020910 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Lars Eggert Cc: Paul Herman , Kirill Ponomarew , freebsd-net@FreeBSD.ORG Subject: Re: delayed ACK References: <3DAC8206.1080604@isi.edu> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org Lars Eggert wrote: >Paul Herman wrote: > > >>Not true. Although some bugs have been fixed in 4.3, FreeBSD's >>delayed ACKs will still degrade your performance dramatically in >>some cases. >> >> > >I'm sorry, but such statements without a packet trace that exhibits the >problem are just not useful. > >Lars > > He's probably referring to poorly behaved windows clients, on certain applications, if you leave net.inet.tcp.slowstart_flightsize at default. Incidentally, why are not the defaults on net.inet.tcp.slowstart_flightsize higher? RFC2414 seems to indicate it should be higher. Solaris in version 8 and later default to 4 for this value. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message