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 20:51:13 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 30 Jan 2001 20:51:03 -0500 Received: from shell.cyberus.ca ([209.195.95.7]:51383 "EHLO shell.cyberus.ca") by vger.kernel.org with ESMTP id ; Tue, 30 Jan 2001 20:50:51 -0500 Date: Tue, 30 Jan 2001 20:45:59 -0500 (EST) From: jamal To: Rick Jones 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: <3A77661C.5D7FD4C@cup.hp.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 30 Jan 2001, Rick Jones wrote: > > ** 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? Yes, sir, it is. To be precise: ** Sender: SMP-PII-450Mhz, ASUS m/board; 3com version of acenic - 1M version ** receiver: same hardware; acenic alteon card - 1M version > How does ZC/SG change the nature of the packets presented to the NIC? what do you mean? I am _sure_ you know how SG/ZC work. So i am suspecting more than socratic view on life here. Could be influence from Aristotle;-> > How well does the NIC do with that changed nature? > Hard question to answer ;-> I havent done any analysis at that level cheers, jamal - 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/