From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S267714AbUG3Pfr (ORCPT ); Fri, 30 Jul 2004 11:35:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267716AbUG3Pfr (ORCPT ); Fri, 30 Jul 2004 11:35:47 -0400 Received: from rproxy.gmail.com ([64.233.170.202]:7294 "EHLO mproxy.gmail.com") by vger.kernel.org with ESMTP id S267714AbUG3Pfa (ORCPT ); Fri, 30 Jul 2004 11:35:30 -0400 Message-ID: Date: Fri, 30 Jul 2004 17:35:29 +0200 From: Bart Alewijnse To: linux-kernel@vger.kernel.org Subject: Re: gigabit trouble In-Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit References: <20040729210401.A32456@electric-eye.fr.zoreil.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org (I am a moron, and gmail isn't helping. I keep sending this stuff to people, not the list. Sorry.) On Fri, 30 Jul 2004 00:41:03 +0200, Bart Alewijnse wrote: > I was going to do an exhaustive test, but because my computer stopped > running completely, I'll reply to the one or two bits I can now. ...which was unrelated. Although I can't get the noise anymore now either. I'm not too happy, I like my problems reproducable. Of course, in the course of tring to fix the nonbootability, I changed a bunch of things. Hrm. I'll try getting it back later. > > > So, question one - how do I see the link speed under linux, and how, > > > if at all, do I control it? > > > > ethtool > Thanks. That wasn't the problem - the line speed's a gbit. Definately. I've now seen speeds up to 22MB/s, but only in pure network benching (netio), and only with udp, although I guess that makes a some sense. (Also, for some reason it makes a respectable difference which computer I run the netio server on. I mean, netio measures speed both ways on one run, and it's different depending on where I run it. I guess that suggests io limiting) So the hanging around ten MB/s was just coincidence - it still does it in both nfs and samba, but I guess it's io limited *somewhere*, but trying to figure out why doesn't belong in this list, I guess. Or maybe it does; I've always wondered why samba hangs around 3, 4, 5, maybe 6 MB/s on a 100mbit link - which with netio shows that it can go at 11MB/s, its full speed - and even nfs rarely tops above eight. On my friend's setup too, and he *does* have respectable hardware in his server:) I assume the 20MB/s top speed on my gbit cards is io limiting, and possibly the fact that they're 32bit cards in 33mhz slots. Still, it's far from impressive. Any suggestions (on where to go) about improving it? Anyhow, thanks for the help so far. --Bart Alewijnse