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 12:49:37 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 30 Jan 2001 12:49:27 -0500 Received: from f00f.stub.clear.net.nz ([203.167.224.51]:262 "HELO metastasis.f00f.org") by vger.kernel.org with SMTP id ; Tue, 30 Jan 2001 12:49:13 -0500 Date: Wed, 31 Jan 2001 06:49:11 +1300 From: Chris Wedgwood To: Andrew Morton Cc: "David S. Miller" , lkml , "netdev@oss.sgi.com" Subject: Re: sendfile+zerocopy: fairly sexy (nothing to do with ECN) Message-ID: <20010131064911.B7244@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> <3A76B72D.2DD3E640@uow.edu.au> <14966.47384.971741.939842@pizda.ninka.net> <3A76D6A4.2385185E@uow.edu.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <3A76D6A4.2385185E@uow.edu.au>; from andrewm@uow.edu.au on Wed, Jan 31, 2001 at 01:58:44AM +1100 X-No-Archive: Yes Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jan 31, 2001 at 01:58:44AM +1100, Andrew Morton wrote: Mount the server rsize=wsize=8192. `cp' a 102,400,000 byte file from the NFS server to /dev/null. The file is fully cached on the server. unmount and remount the server between runs to eliminate client caching. The copy takes 8.654 seconds. That's 11.8 megabytes/sec. What server are you using here? Using NetApp filers I don't see anything like this, probably only 8.5MB/s at most and this number is fairly noisy. --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/