From owner-freebsd-hackers Thu Nov 29 21:27: 7 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from c527597-a.cstvl1.sfba.home.com (c527597-a.cstvl1.sfba.home.com [24.176.204.87]) by hub.freebsd.org (Postfix) with ESMTP id 9EA1137B416 for ; Thu, 29 Nov 2001 21:27:02 -0800 (PST) Received: (from bmah@localhost) by c527597-a.cstvl1.sfba.home.com (8.11.6/8.11.6) id fAU5R0s11199; Thu, 29 Nov 2001 21:27:00 -0800 (PST) (envelope-from bmah) Message-Id: <200111300527.fAU5R0s11199@c527597-a.cstvl1.sfba.home.com> X-Mailer: exmh version 2.5 07/13/2001 with nmh-1.0.4 To: jc@irbs.com Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: FreeBSD performing worse than Linux? In-Reply-To: <20011129004234.A16101@exuma.irbs.com> References: <20011128153817.T61580@monorchid.lemis.com> <15364.38174.938500.946169@caddis.yogotech.com> <20011129004234.A16101@exuma.irbs.com> Comments: In-reply-to John Capo message dated "Thu, 29 Nov 2001 00:42:34 -0500." From: "Bruce A. Mah" Reply-To: bmah@FreeBSD.ORG X-Face: g~c`.{#4q0"(V*b#g[i~rXgm*w;:nMfz%_RZLma)UgGN&=j`5vXoU^@n5v4:OO)c["!w)nD/!!~e4Sj7LiT'6*wZ83454H""lb{CC%T37O!!'S$S&D}sem7I[A 2V%N&+ X-Image-Url: http://www.employees.org/~bmah/Images/bmah-cisco-small.gif X-Url: http://www.employees.org/~bmah/ Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_1809086212P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Date: Thu, 29 Nov 2001 21:27:00 -0800 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 --==_Exmh_1809086212P Content-Type: text/plain; charset=us-ascii If memory serves me right, John Capo wrote: [TCP weirdness] > I see exactly the same behavior on 3 -stable machines running kernels > from late October and early November. Another -stable machine with > a kernel from late September does pause but not as consistently as > the later kernel machines do. The client machine is running a > kernel from early November. How early in November? I'm staring at this commit message and wondering if it has any relevance to your situation: ----- revision 1.107.2.18 date: 2001/11/12 22:11:24; author: nate; state: Exp; lines: +3 -1 MFH: V1.139 when newreno is turned on, if dupacks = 1 or dupacks = 2 and new data is acknowledged, reset the dupacks to 0. The problem was spotted when a connection had its send buffer full because the congestion window was only 1 MSS and was not being incremented because dupacks was not reset to 0. Reviewed by: jlemon ----- Bruce. --==_Exmh_1809086212P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (FreeBSD) Comment: Exmh version 2.3.1+ 05/14/2001 iD8DBQE8Bxik2MoxcVugUsMRAp0BAJoDRLTc7hQOSaHxLZRtJ2644wg9JACffNIC CLif9tOdN/KQRFF7ktZJekk= =XXeE -----END PGP SIGNATURE----- --==_Exmh_1809086212P-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message