From owner-freebsd-net Fri Sep 20 21: 0:18 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 85F7D37B401 for ; Fri, 20 Sep 2002 21:00:16 -0700 (PDT) Received: from rwcrmhc52.attbi.com (rwcrmhc52.attbi.com [216.148.227.88]) by mx1.FreeBSD.org (Postfix) with ESMTP id 378CE43E42 for ; Fri, 20 Sep 2002 21:00:16 -0700 (PDT) (envelope-from julian@elischer.org) Received: from InterJet.elischer.org ([12.232.206.8]) by rwcrmhc52.attbi.com (InterMail vM.4.01.03.27 201-229-121-127-20010626) with ESMTP id <20020921040012.CSRN464.rwcrmhc52.attbi.com@InterJet.elischer.org>; Sat, 21 Sep 2002 04:00:12 +0000 Received: from localhost (localhost.elischer.org [127.0.0.1]) by InterJet.elischer.org (8.9.1a/8.9.1) with ESMTP id UAA22551; Fri, 20 Sep 2002 20:44:19 -0700 (PDT) Date: Fri, 20 Sep 2002 20:44:18 -0700 (PDT) From: Julian Elischer To: Mike Silbersack Cc: net@freebsd.org Subject: Re: Tcp question. In-Reply-To: <20020920221735.Q6684-100000@patrocles.silby.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII 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 On Fri, 20 Sep 2002, Mike Silbersack wrote: > > On Fri, 20 Sep 2002, Julian Elischer wrote: > > > 000221 C.ssh > B.916: . [tcp sum ok] ack 66194 win 24624 > > nop,nop,timestamp 259781842 16260556> (DF) > > (ttl 64, id 18252, len 52) > > **why wait here**? > > 003030 C.ssh > B.916: . [tcp sum ok] ack 68930 win 24624 > > nop,nop,timestamp 259781842 16260556> (DF) > > (ttl 64, id 18253, len 52) > > Ok, I now have a more constructive reply. (Having reread with an > understanding of the timestamps... I hadn't used -ttt before.) > > tcp_output.c rev 1.53 sounds like it may be applicable to this case: > > Add a flag TF_LASTIDLE, that forces a previously idle connection > to send all its data, especially when the data is less than one MSS. > This fixes an issue where the stack was delaying the sending > of data, eventhough there was enough window to send all the data and > the sending of data was emptying the socket buffer. > > Problem found by Yoshihiro Tsuchiya (tsuchiya@flab.fujitsu.co.jp) > > Submitted by: Jayanth Vijayaraghavan > > Apply that to host B and see if it helps. Wow.. that certainly sounds liek it might apply.. (though why it wasn't a problem with the othe rsession I don't know.) l'll try that for certain > > Mike "Silby" Silbersack > > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message