From owner-freebsd-stable@FreeBSD.ORG Mon Jan 16 04:56:16 2012 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 DD919106564A for ; Mon, 16 Jan 2012 04:56:15 +0000 (UTC) (envelope-from kob6558@gmail.com) Received: from mail-wi0-f182.google.com (mail-wi0-f182.google.com [209.85.212.182]) by mx1.freebsd.org (Postfix) with ESMTP id 6D6BF8FC0A for ; Mon, 16 Jan 2012 04:56:15 +0000 (UTC) Received: by wibhq12 with SMTP id hq12so636476wib.13 for ; Sun, 15 Jan 2012 20:56:14 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=R+lQV51QjKQJzKp4z1ABHRqH/CtqThPQOImxUmvuaAQ=; b=kzQ+B/hpU9IdlRa5GfRckj+W0zheDsl1f5hgjT6LgzSGz34eHYWNDBZwajV/tRakvT Lk1SM7Z3v7U3XYuaBPSpJXOnhhfEKpAABuU3VCGB8fLYmEX8OtY3oc5asrHQBPtvYzEJ RganFt3Aw32haDUIAjTm7sNzfNRQvo3t5Tykg= MIME-Version: 1.0 Received: by 10.180.105.129 with SMTP id gm1mr13511486wib.1.1326689774388; Sun, 15 Jan 2012 20:56:14 -0800 (PST) Received: by 10.223.119.203 with HTTP; Sun, 15 Jan 2012 20:56:14 -0800 (PST) In-Reply-To: <1196DEC9-2AEE-4F9A-8521-EFA8513D6003@lists.zabbadoz.net> References: <9728B37F7A4EBE45A2FD4B18883BAED6D02612@SN2PRD0802MB111.namprd08.prod.outlook.com> <40A76FC1992140AFA5B8EB52C28DB3A1@multiplay.co.uk> <1196DEC9-2AEE-4F9A-8521-EFA8513D6003@lists.zabbadoz.net> Date: Sun, 15 Jan 2012 20:56:14 -0800 Message-ID: From: Kevin Oberman To: "Bjoern A. Zeeb" Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: ml-freebsd-stable Stable , Steven Hartland Subject: Re: HPN-SSH question 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: Mon, 16 Jan 2012 04:56:16 -0000 On Sun, Jan 15, 2012 at 10:58 AM, Bjoern A. Zeeb < bzeeb-lists@lists.zabbadoz.net> wrote: > On 15. Jan 2012, at 16:28 , Steven Hartland wrote: > > > Yep we installed openssh-portable + HPN and experienced noticeably > > reduced transfer rates on high latency links, exactly the opposite > > as one would expect. I don't have the exact figures I'm afraid as > > we just went straight back to standard ssh. > > > > I'll try and get some time to retest and provide some proper > > results. > > Thanks. If you do please try the bundled version in 8-STABLE or 9 and > also gather the usual meta data (latency, packet loss, IPv4/v6, any > socket buffer tuning, ...). > And, if it happens with 9, any chance of a tcpdump capture of all of the headers for analysis? (No packet data needed.) We use the HPN version extensively on high latency links (often trans-oceanic) and have never seen that. I'd find running tcptrace and generating time plots very useful for looking at this sort of performance issue. -- R. Kevin Oberman, Network Engineer E-mail: kob6558@gmail.com