From owner-freebsd-stable@FreeBSD.ORG Thu May 29 15:04:05 2008 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id AAEE1106567B for ; Thu, 29 May 2008 15:04:05 +0000 (UTC) (envelope-from prvs=1035d7911d=killing@multiplay.co.uk) Received: from mail1.multiplay.co.uk (core6.multiplay.co.uk [85.236.96.23]) by mx1.freebsd.org (Postfix) with ESMTP id 24BDD8FC2B for ; Thu, 29 May 2008 15:04:04 +0000 (UTC) (envelope-from prvs=1035d7911d=killing@multiplay.co.uk) DKIM-Signature: v=1; a=rsa-sha256; c=simple; d=multiplay.co.uk; s=Multiplay; t=1212072323; x=1212677123; q=dns/txt; h=Received: Message-ID:From:To:References:Subject:Date:MIME-Version: Content-Type:Content-Transfer-Encoding; bh=lyq1wck2udB30uaetdxmA LAAIx741vkaZlZZdpDMkns=; b=VCtV8Svau3h08fgSyI7Agxgb1jMS52FyRrsjp ubChYfWU64Ebkzawq5OnxyHL3VBhgCYJEHjbkXcVb1aSZMWCK6xlLX8qe4oTAcjn Td/xcUCUen8u7RtoCFXl7z8d2nfSpa95hVN4eGu2aPi4mwIBWPXdmE68E/jnDIGu oQgEJo= X-Spam-Checker-Version: SpamAssassin 3.1.8 (2007-02-13) on mail1.multiplay.co.uk X-Spam-Level: X-Spam-Status: No, score=-14.7 required=6.0 tests=BAYES_00, FORGED_MUA_OUTLOOK, USER_IN_WHITELIST,USER_IN_WHITELIST_TO autolearn=ham version=3.1.8 Received: from r2d2 by mail1.multiplay.co.uk (MDaemon PRO v9.6.5) with ESMTP id md50005687022.msg for ; Thu, 29 May 2008 15:45:21 +0100 X-Authenticated-Sender: Killing@multiplay.co.uk X-MDRemoteIP: 212.135.219.182 X-Return-Path: prvs=1035d7911d=killing@multiplay.co.uk X-Envelope-From: killing@multiplay.co.uk X-MDaemon-Deliver-To: freebsd-stable@freebsd.org Message-ID: From: "Steven Hartland" To: "Arnaud Houdelette" , References: <483EBCDD.2070408@tzim.net> Date: Thu, 29 May 2008 15:45:18 +0100 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5512 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5512 X-Spam-Processed: mail1.multiplay.co.uk, Thu, 29 May 2008 15:45:22 +0100 X-MDAV-Processed: mail1.multiplay.co.uk, Thu, 29 May 2008 15:45:23 +0100 Cc: Subject: Re: Bad TCP performance with large MTU on 7-stable. X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 29 May 2008 15:04:05 -0000 Does the trace show the window size being negotiated correctly? ----- Original Message ----- From: "Arnaud Houdelette" >I got really poor performance when I try to upload files to the box (via > pureFTP or Samba) when using jumbo frames somewhat above 2k. > > uname -a : > FreeBSD carenath.tzim.net 7.0-STABLE FreeBSD 7.0-STABLE #4: Wed May 28 > 17:45:14 CEST 2008 > tzim@carenath.tzim.net:/usr/obj/usr/src/sys/CARENATH amd64 > > It seems that TCP acks are delayed for about a second, so the upload > rate nevers goes above 60kB/s. I can provide wireshark captures done on > the box uploading the files if necessary. > The client is a Windows XP64 box, but I do not recall having the same > problem on 6.2. I did got about 100 MB/s for similar file transfers, but > I had to disable jumbo frames when I upgraded to 7.0-Release because of > some bug on txcsum/rxcsum on re(4) so I only noticed the issue recently. > > The txcsum bug doesn't seem to occur anymore, but now I have this > strange rate issue, with or without checksum offloading disabled. > I also tried with tso disabled. Same results. Is it related to the re(4) > driver ? Or to the TCP stack ? ================================================ This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it. In the event of misdirection, illegible or incomplete transmission please telephone +44 845 868 1337 or return the E.mail to postmaster@multiplay.co.uk.