From owner-freebsd-net@FreeBSD.ORG Sat Oct 30 21:30:27 2010 Return-Path: Delivered-To: freebsd-net@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id D3761106566C for ; Sat, 30 Oct 2010 21:30:27 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id A725C8FC18 for ; Sat, 30 Oct 2010 21:30:27 +0000 (UTC) Received: from freefall.freebsd.org (localhost [127.0.0.1]) by freefall.freebsd.org (8.14.4/8.14.4) with ESMTP id o9ULURVB090768 for ; Sat, 30 Oct 2010 21:30:27 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.4/8.14.4/Submit) id o9ULURm3090761; Sat, 30 Oct 2010 21:30:27 GMT (envelope-from gnats) Date: Sat, 30 Oct 2010 21:30:27 GMT Message-Id: <201010302130.o9ULURm3090761@freefall.freebsd.org> To: freebsd-net@FreeBSD.org From: Nick Christenson Cc: Subject: Re: kern/121257: [tcp] TSO + natd -> slow outgoing tcp traffic X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Nick Christenson List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 30 Oct 2010 21:30:27 -0000 The following reply was made to PR kern/121257; it has been noted by GNATS. From: Nick Christenson To: bug-followup@FreeBSD.org, vnovy@vnovy.net Cc: Subject: Re: kern/121257: [tcp] TSO + natd -> slow outgoing tcp traffic Date: Sat, 30 Oct 2010 14:03:13 -0700 (PDT) I notice that not much has been done on this bug in the last couple of years, so here's a bump. I have reproduced this bug on an amd64 machine running FreeBSD 7.3-RELEASE-p3 with network cards using the msk driver. I'm running natd and pf. I'm not the only one who has encountered this. Other references to what looks like the same problem: http://lists.freebsd.org/pipermail/freebsd-net/2010-July/025731.html http://forums.freebsd.org/showthread.php?t=13900 http://osdir.com/ml/freebsd.bugs/2002-03/msg00051.html http://unix.derkeiler.com/Mailing-Lists/FreeBSD/questions/2010-01/msg00674.html http://comments.gmane.org/gmane.os.freebsd.current/127669 (subject "significantly slow IPFW + NATD + amd64) Many of these don't include resolutions, so if this can't be fixed, at least publicizing the work around would seem to be well advised. It sounds from the bug like the developers have a good handle on the problem, but if I can do anything to help test, let me know. -- Nick Christenson npc@gangofone.com