From owner-freebsd-performance@FreeBSD.ORG Thu Nov 10 09:06:37 2005 Return-Path: X-Original-To: freebsd-performance@freebsd.org Delivered-To: freebsd-performance@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 491C216A41F for ; Thu, 10 Nov 2005 09:06:37 +0000 (GMT) (envelope-from rwatson@FreeBSD.org) Received: from cyrus.watson.org (cyrus.watson.org [209.31.154.42]) by mx1.FreeBSD.org (Postfix) with ESMTP id EEAE643D45 for ; Thu, 10 Nov 2005 09:06:36 +0000 (GMT) (envelope-from rwatson@FreeBSD.org) Received: from fledge.watson.org (fledge.watson.org [209.31.154.41]) by cyrus.watson.org (Postfix) with ESMTP id 970B546B1C; Thu, 10 Nov 2005 04:06:35 -0500 (EST) Date: Thu, 10 Nov 2005 09:06:35 +0000 (GMT) From: Robert Watson X-X-Sender: robert@fledge.watson.org To: Mike Jakubik In-Reply-To: <43727712.4020500@rogers.com> Message-ID: <20051110090429.J33260@fledge.watson.org> References: <70e8236f0511050457s5ce6d8batf805fbc9edd91360@mail.gmail.com> <20051109060931.GD5188@obiwan.tataz.chchile.org> <70e8236f0511090517g29b3f887x1b97ef5dec04548@mail.gmail.com> <70e8236f0511090627p24c90400ke39bdb0da222a323@mail.gmail.com> <4372184C.10809@mebius.lv> <43727712.4020500@rogers.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: freebsd-performance@freebsd.org, Arkadi Shishlov Subject: Re: Poor Samba throughput on 6.0 X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 10 Nov 2005 09:06:37 -0000 On Wed, 9 Nov 2005, Mike Jakubik wrote: > I have done many tests to try to determine the poor performance on my > systems (FreeBSD-current connected directly to Windows XP via identical > Intel Pro 1000 cards) and my only conclusion is that Samba on FreeBSD > when talking to a Windows box is simply fubared. Im willing to bet thats > not the case on Linux. I can get great speeds (~30MB/s) using ftp > between the machines, but when i use Samba, i get a maximum of 11MB/s. I > have tried playing with mtu size, samba options, polling, but there does > not seem to be any visible bottlenecks, its just simply slow. It would > be great if someone could get to the bottom of this, its quite > frustrating. There are a number of TCP related configuration frobs on FreeBSD. It would be quite interesting to know how modifying each of the following settings affects Samba performance: net.inet.tcp.delayed_ack net.inet.tcp.sack.enable net.inet.tcp.inflight.enable There has been recent evidence that the inflight bandwidth calculation is having problems generating stable performance at high bandwidth and low latency, so I might try that one first. Robert N M Watson