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 20:11:36 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 30 Jan 2001 20:11:28 -0500 Received: from palrel1.hp.com ([156.153.255.242]:60427 "HELO palrel1.hp.com") by vger.kernel.org with SMTP id ; Tue, 30 Jan 2001 20:11:11 -0500 Message-ID: <3A77661C.5D7FD4C@cup.hp.com> Date: Tue, 30 Jan 2001 17:10:52 -0800 From: Rick Jones Organization: the Unofficial HP X-Mailer: Mozilla 4.75 [en] (X11; U; HP-UX B.11.00 9000/785) X-Accept-Language: en MIME-Version: 1.0 To: jamal Cc: Ion Badulescu , Andrew Morton , lkml , "netdev@oss.sgi.com" Subject: Re: Still not sexy! (Re: sendfile+zerocopy: fairly sexy (nothing to dowith ECN) In-Reply-To: Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > ** I reported that there was also an oddity in throughput values, > unfortunately since no one (other than me) seems to have access > to a gige cards in the ZC list, nobody can confirm or disprove > what i posted. Here again as a reminder: > > Kernel | tput | sender-CPU | receiver-CPU | > ------------------------------------------------- > 2.4.0-pre3 | 99MB/s | 87% | 23% | > NSF | | | | > ------------------------------------------------- > 2.4.0-pre3 | 86MB/s | 100% | 17% | > SF | | | | > ------------------------------------------------- > 2.4.0-pre3 | 66.2 | 60% | 11% | > +ZC | MB/s | | | > ------------------------------------------------- > 2.4.0-pre3 | 68 | 8% | 8% | > +ZC SF | MB/s | | | > ------------------------------------------------- > > Just ignore the CPU readings, focus on throughput. And could someone plese > post results? In the spirit of the socratic method :) Is your gige card based on Alteon? How does ZC/SG change the nature of the packets presented to the NIC? How well does the NIC do with that changed nature? rick jones sometimes, performance tuning is like squeezing a balloon. one part gets smaller, but then you start to see the rest of the balloon... -- ftp://ftp.cup.hp.com/dist/networking/misc/rachel/ these opinions are mine, all mine; HP might not want them anyway... :) feel free to email, OR post, but please do NOT do BOTH... my email address is raj in the cup.hp.com domain... - 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/