From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 30 Jan 2001 19:31:50 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 30 Jan 2001 19:31:40 -0500 Received: from f00f.stub.clear.net.nz ([203.167.224.51]:5382 "HELO metastasis.f00f.org") by vger.kernel.org with SMTP id ; Tue, 30 Jan 2001 19:31:26 -0500 Date: Wed, 31 Jan 2001 13:31:23 +1300 From: Chris Wedgwood To: "David S. Miller" Cc: Andrew Morton , lkml , "netdev@oss.sgi.com" Subject: Re: sendfile+zerocopy: fairly sexy (nothing to do with ECN) Message-ID: <20010131133123.A7875@metastasis.f00f.org> In-Reply-To: <3A76B72D.2DD3E640@uow.edu.au> <3A728475.34CF841@uow.edu.au> <3A726087.764CC02E@uow.edu.au> <20010126222003.A11994@vitelus.com> <14966.22671.446439.838872@pizda.ninka.net> <14966.47384.971741.939842@pizda.ninka.net> <3A76D6A4.2385185E@uow.edu.au> <20010131064911.B7244@metastasis.f00f.org> <14967.15765.553667.802101@pizda.ninka.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <14967.15765.553667.802101@pizda.ninka.net>; from davem@redhat.com on Tue, Jan 30, 2001 at 02:17:57PM -0800 X-No-Archive: Yes Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jan 30, 2001 at 02:17:57PM -0800, David S. Miller wrote: 8.5MB/sec sounds like half-duplex 100baseT. No; I'm 100% its FD; HD gives 40k/sec TCP because of collisions and such like. Positive you are running at full duplex all the way to the netapp, and if so how many switches sit between you and this netapp? It's FD all the way (we hardwire everything to 100-FD and never trust auto-negotiate); I see no errors or such like anywhere. There are ... ... 3 switches between four switches in between, mostly linked via GE. I'm not sure if latency might be an issue here, is it was critical I can imagine 10 km of glass might be a problem but it's not _that_ far... --cw - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/