From owner-freebsd-questions@FreeBSD.ORG  Wed Nov 17 01:24:17 2004
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 0E40116A4CE
	for <questions@FreeBSD.org>; Wed, 17 Nov 2004 01:24:17 +0000 (GMT)
Received: from mx-2.kaznic.com (mx-2.kaznic.com [63.105.92.242])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 9058443D31
	for <questions@FreeBSD.org>; Wed, 17 Nov 2004 01:24:16 +0000 (GMT)
	(envelope-from mfisch@kaz.com)
Received: from localhost (mail.kaz.com [63.105.92.242])
	by mx-2.kaznic.com (Postfix) with ESMTP id 5FDFB38B9D1
	for <questions@FreeBSD.org>; Tue, 16 Nov 2004 20:23:49 -0500 (EST)
Received: from mx-2.kaznic.com ([63.105.92.242])
 by localhost (mail.kaz.com [63.105.92.242:10024]) (amavisd-new) with LMTP
 id 09778-01-40 for <questions@FreeBSD.org>;
 Tue, 16 Nov 2004 20:23:49 -0500 (EST)
Received: from pluto.corp.kaz.com (pluto.kaz.com [63.105.92.228])
	by mx-2.kaznic.com (Postfix) with ESMTP id 08C9138B9CF
	for <questions@FreeBSD.org>; Tue, 16 Nov 2004 20:23:49 -0500 (EST)
X-MimeOLE: Produced By Microsoft Exchange V6.0.6249.0
Content-Class: urn:content-classes:message
MIME-Version: 1.0
Date: Tue, 16 Nov 2004 20:23:44 -0500
Message-ID: <B2031B1FF0FEAF48B557C4CC7E20B7841885FB@pluto.corp.kaz.com>
X-MS-Has-Attach: 
X-MS-TNEF-Correlator: 
Thread-Topic: TCP Inflight Debug
Thread-Index: AcTMQ+Kesie1PPXcSkSsorHeX3EXZw==
From: "Fisch, Matthew" <mfisch@kaz.com>
To: <questions@FreeBSD.org>
Content-Type: text/plain;
	charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
X-Content-Filtered-By: Mailman/MimeDel 2.1.1
Subject: TCP Inflight Debug
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>,
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>,
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 17 Nov 2004 01:24:17 -0000

Im trying to debug slow tcp transfers on a 100mbit link with a large
variable bandwidth delay product. Can someone describe the meaning of
the inflight debugging output?

=20

net.inet.tcp.inflight_debug: 1

=20

0xca2702e0 bw 885887956 rttbest 10 srtt 7 bwnd 2217615

0xc8394170 bw 840998588 rttbest 10 srtt 7 bwnd 2105392

0xc836ab80 bw 842026536 rttbest 10 srtt 7 bwnd 2107962

0xca270a10 bw 232052 rttbest 84 srtt 109 bwnd 9657

0xc87fb450 bw 902405694 rttbest 10 srtt 7 bwnd 2258910

0xc8394170 bw 880116973 rttbest 10 srtt 11 bwnd 2753261

0xca270a10 bw 300922 rttbest 84 srtt 163 bwnd 14262

0xca270000 bw 988204579 rttbest 12 srtt 11 bwnd 3399849

0xca270a10 bw 170910 rttbest 84 srtt 145 bwnd 8784

0xca270a10 bw 202413 rttbest 84 srtt 193 bwnd 11425

0xc8394a10 bw 983212216 rttbest 10 srtt 7 bwnd 2460926

0xca270a10 bw 179225 rttbest 84 srtt 127 bwnd 8576

0xca270a10 bw 150860 rttbest 84 srtt 132 bwnd 7787

0xc87fb2e0 bw 917529420 rttbest 11 srtt 11 bwnd 3156903

0xca270cf0 bw 969682982 rttbest 13 srtt 11 bwnd 3639207