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 17:30:43 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 30 Jan 2001 17:30:32 -0500 Received: from pizda.ninka.net ([216.101.162.242]:12422 "EHLO pizda.ninka.net") by vger.kernel.org with ESMTP id ; Tue, 30 Jan 2001 17:30:17 -0500 From: "David S. Miller" MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <14967.16395.42967.978677@pizda.ninka.net> Date: Tue, 30 Jan 2001 14:28:27 -0800 (PST) To: Andrew Morton Cc: lkml , "netdev@oss.sgi.com" Subject: Re: sendfile+zerocopy: fairly sexy (nothing to do with ECN) In-Reply-To: <3A76D6A4.2385185E@uow.edu.au> 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> X-Mailer: VM 6.75 under 21.1 (patch 13) "Crater Lake" XEmacs Lucid Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Andrew Morton writes: > The box has 130 mbyte/sec memory write bandwidth, so saving > a copy should save 10% of this. (Wanders away, scratching > head...) Are you sure your measurment program will account properly for all system cycles spent in softnet processing? This is where the bulk of the cpu cycle savings will occur. Later, David S. Miller davem@redhat.com - 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/