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 19:55:34 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 30 Jan 2001 19:55:24 -0500 Received: from shell.cyberus.ca ([209.195.95.7]:43191 "EHLO shell.cyberus.ca") by vger.kernel.org with ESMTP id ; Tue, 30 Jan 2001 19:55:14 -0500 Date: Tue, 30 Jan 2001 19:53:59 -0500 (EST) From: jamal To: Ion Badulescu cc: Andrew Morton , lkml , "netdev@oss.sgi.com" Subject: Still not sexy! (Re: sendfile+zerocopy: fairly sexy (nothing to do with ECN) In-Reply-To: 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 Mon, 29 Jan 2001, Ion Badulescu wrote: > On Mon, 29 Jan 2001, jamal wrote: > > > > 11.5kBps, quite consistently. > > > > This gige card is really sick. Are you sure? Please double check. > > Umm.. the starfire chipset is 100Mbit only. So 11.5MBps (sorry, that was a > typo, it's mega not kilo) is really all I'd expect out of it. > not good. So far all the tests have been around CPU. The general trend seems to be: - sendfile + ZC good for CPU - write() + ZC not good for CPU (i might have forgotten something from Andrew's results). This happens (even with my bogus cpu measure) to be similar. That seems to be explainable. ** 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? 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/