Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750854AbVIWJf5 (ORCPT ); Fri, 23 Sep 2005 05:35:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750852AbVIWJf5 (ORCPT ); Fri, 23 Sep 2005 05:35:57 -0400 Received: from gw1.cosmosbay.com ([62.23.185.226]:712 "EHLO gw1.cosmosbay.com") by vger.kernel.org with ESMTP id S1750768AbVIWJf5 (ORCPT ); Fri, 23 Sep 2005 05:35:57 -0400 Message-ID: <4333CC69.3000401@cosmosbay.com> Date: Fri, 23 Sep 2005 11:35:37 +0200 From: Eric Dumazet User-Agent: Mozilla Thunderbird 1.0 (Windows/20041206) X-Accept-Language: fr, en MIME-Version: 1.0 To: akpm@osdl.org CC: "David S. Miller" , kiran@scalex86.org, rusty@rustcorp.com.au, dipankar@in.ibm.com, linux-kernel@vger.kernel.org Subject: Re: [patch 0/6] mm: alloc_percpu and bigrefs References: <20050923062529.GA4209@localhost.localdomain> <20050923001013.28b7f032.akpm@osdl.org> <20050923.001729.101033164.davem@davemloft.net> <4333C4E2.9000000@cosmosbay.com> In-Reply-To: <4333C4E2.9000000@cosmosbay.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-1.6 (gw1.cosmosbay.com [172.16.8.80]); Fri, 23 Sep 2005 11:35:38 +0200 (CEST) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1403 Lines: 51 Andrew Morton a ?crit : > Eric Dumazet wrote: > >> Please (re)consider this patch since it really reduce CPU load and/or memory >> bus trafic between CPUS. > > > Did you actually measure this? If so, you should publish the results. > > Hi Andrew Well yes I did. Here is part of the mail sent on netdev one month ago : Hi David I played and I have very good results with the following patches. # tc -s -d qdisc show dev eth0 ; sleep 10 ; tc -s -d qdisc show dev eth0 qdisc pfifo_fast 0: bands 3 priomap 1 2 2 2 1 2 0 0 1 1 1 1 1 1 1 1 Sent 440173135511 bytes 3211378293 pkt (dropped 240817, overlimits 0 requeues 27028035) backlog 0b 0p requeues 27028035 qdisc pfifo_fast 0: bands 3 priomap 1 2 2 2 1 2 0 0 1 1 1 1 1 1 1 1 Sent 440216655667 bytes 3211730812 pkt (dropped 240904, overlimits 0 requeues 27031668) backlog 0b 0p requeues 27031668 (So about 360 requeues per second, much better than before (12000 / second)) oprofile results give 0.6257 % qdisc_restart (instead of 2.6452 %) thread is archived here : http://marc.theaimsgroup.com/?l=linux-netdev&m=112521684415443&w=2 Thank you Eric - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/