From owner-freebsd-net@freebsd.org Tue Oct 4 03:14:41 2016 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 285CCAF4D44 for ; Tue, 4 Oct 2016 03:14:41 +0000 (UTC) (envelope-from julian@freebsd.org) Received: from vps1.elischer.org (vps1.elischer.org [204.109.63.16]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "vps1.elischer.org", Issuer "CA Cert Signing Authority" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 06E04B70 for ; Tue, 4 Oct 2016 03:14:40 +0000 (UTC) (envelope-from julian@freebsd.org) Received: from julian-mbp3.pixel8networks.com (50-196-156-133-static.hfc.comcastbusiness.net [50.196.156.133]) (authenticated bits=0) by vps1.elischer.org (8.15.2/8.15.2) with ESMTPSA id u943Ects042765 (version=TLSv1.2 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO) for ; Mon, 3 Oct 2016 20:14:39 -0700 (PDT) (envelope-from julian@freebsd.org) Subject: Re: Strange issue with scp performance To: freebsd-net@freebsd.org References: <57EB9AC8.3050102@matrix.gatewaynet.com> <20161001005558.GB1751@funkthat.com> <57F2072B.6000403@matrix.gatewaynet.com> From: Julian Elischer Message-ID: <4ab30b09-1228-3627-8719-6e782d4a0d82@freebsd.org> Date: Mon, 3 Oct 2016 20:14:33 -0700 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:45.0) Gecko/20100101 Thunderbird/45.3.0 MIME-Version: 1.0 In-Reply-To: <57F2072B.6000403@matrix.gatewaynet.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 04 Oct 2016 03:14:41 -0000 On 3/10/2016 12:22 AM, Achilleas Mantzios wrote: > On 01/10/2016 03:55, John-Mark Gurney wrote: >> Achilleas Mantzios wrote this message on Wed, Sep 28, 2016 at 13:26 >> +0300: >>> We have a weird situation here. We just made a clone of a virtual >>> image running Linux and sent it over to some could provider. The >>> problem is that the scp performance to *many* hosts in our office >>> center has worsened considerably, including one freebsd box. >>> >>> In this freebsd box I run also a jail, and a linux ubuntu image >>> with bhyve. The crazy thing here is that : >>> >>> 1) scp from the original (local office center) linux image to the >>> host FreeBSD, its jailed FreeBSD and its bhyve linux is 2.7 MB/s >>> 2) scp from the cloud linux image to the host FreeBSD is slow >>> (~300KB/s) >>> 3) scp from the cloud linux image to the above FreeBSD's jail is >>> slow(~300KB/s) >>> 4) scp from the cloud linux image to the above FreeBSD's bhyve >>> ubuntu is fast(~1->1.5MB/s) >>> >>> What can cause this behavior? >>> >>> PS >>> Please answer to me directly as I am not subscribed to -net. >>> Thanks a lot for any ideas. >> I worked on this last year a bit, but was never able to track it down. >> >> It may be an issue w/ internal SSH's buffering not growing properly to >> handle the latency. >> >> I posted some info on the wiki about this: >> https://wiki.freebsd.org/SSHPerf > > Thanks tons! > In this case of mine, just playing around with HPN: > > HPNDisabled no > HPNBufferSize 8192 of course we just removed the HPN option for FreebSD's ssh/scp what version are you using? > > in sshd_config was enough to bring it on par with linux. > >> > >