Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752666AbYJ0NnP (ORCPT ); Mon, 27 Oct 2008 09:43:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751521AbYJ0Nm5 (ORCPT ); Mon, 27 Oct 2008 09:42:57 -0400 Received: from styx.suse.cz ([82.119.242.94]:59220 "EHLO mail.suse.cz" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751501AbYJ0Nm4 (ORCPT ); Mon, 27 Oct 2008 09:42:56 -0400 Date: Mon, 27 Oct 2008 14:42:55 +0100 (CET) From: Jiri Kosina To: Mike Galbraith cc: Alan Cox , Ingo Molnar , Andrew Morton , Peter Zijlstra , David Miller , rjw@sisk.pl, s0mbre@tservice.net.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org Subject: Re: [tbench regression fixes]: digging out smelly deadmen. In-Reply-To: <1225109171.4238.23.camel@marge.simson.net> Message-ID: References: <20081024.221653.23695396.davem@davemloft.net> <1224914333.3822.18.camel@marge.simson.net> <1224917623.4929.15.camel@marge.simson.net> <20081025.002420.82739316.davem@davemloft.net> <1225010790.8566.22.camel@marge.simson.net> <1225011648.27415.4.camel@twins> <20081026021153.47878580.akpm@linux-foundation.org> <20081027112750.GA2771@elte.hu> <20081027113306.5b1d5898@lxorguk.ukuu.org.uk> <1225109171.4238.23.camel@marge.simson.net> User-Agent: Alpine 1.10 (LNX 962 2008-03-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 885 Lines: 21 On Mon, 27 Oct 2008, Mike Galbraith wrote: > > real world workloads. If your fairness hurts throughput that much maybe > > your scheduler algorithm is just plain *wrong* as it isn't adapting to > > workload at all well. > Doesn't seem to be scheduler/fairness. 2.6.22.19 is O(1), and falls > apart too, I posted the numbers and full dbench output yesterday. We'll need to look into this a little bit more I think. I have sent out some numbers too, and these indicate very clearly that there is more than 50% performance drop (measured by dbench) just after the very merge of CFS in 2.6.23-rc1 merge window. -- Jiri Kosina SUSE Labs -- 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/