Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263563AbUDGGDg (ORCPT ); Wed, 7 Apr 2004 02:03:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264102AbUDGGDd (ORCPT ); Wed, 7 Apr 2004 02:03:33 -0400 Received: from ppp-217-133-42-200.cust-adsl.tiscali.it ([217.133.42.200]:63110 "EHLO dualathlon.random") by vger.kernel.org with ESMTP id S263563AbUDGGDc (ORCPT ); Wed, 7 Apr 2004 02:03:32 -0400 Date: Wed, 7 Apr 2004 08:03:30 +0200 From: Andrea Arcangeli To: Ingo Molnar Cc: Eric Whiting , akpm@osdl.org, linux-kernel@vger.kernel.org Subject: Re: -mmX 4G patches feedback [numbers: how much performance impact] Message-ID: <20040407060330.GB26888@dualathlon.random> References: <40718B2A.967D9467@amis.com> <20040405174616.GH2234@dualathlon.random> <4071D11B.1FEFD20A@amis.com> <20040405221641.GN2234@dualathlon.random> <20040406115539.GA31465@elte.hu> <20040406155925.GW2234@dualathlon.random> <20040406192549.GA14869@elte.hu> <20040406202548.GI2234@dualathlon.random> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20040406202548.GI2234@dualathlon.random> User-Agent: Mutt/1.4.1i X-GPG-Key: 1024D/68B9CB43 13D9 8355 295F 4823 7C49 C012 DFA1 686E 68B9 CB43 X-PGP-Key: 1024R/CB4660B9 CC A0 71 81 F4 A0 63 AC C0 4B 81 1D 8C 15 C8 E5 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1073 Lines: 22 On Tue, Apr 06, 2004 at 10:25:48PM +0200, Andrea Arcangeli wrote: > I'm using DOUBLE. However I won't post the quips, I draw the graph > showing the performance for every working set, that gives a better > picture of what is going on w.r.t. memory bandwidth/caches/tlb. Here we go: http://www.kernel.org/pub/linux/kernel/people/andrea/misc/31-44-100-1000/31-44-100-1000.html the global quips you posted indeed had no way to account for the part of the curve where 4:4 badly hurts. details in the above url. Please cross check my results on your hardware (I used a 2.5Ghz xeon, 1G of ram, and benchs run fresh after boot with all ram still free). Numbers are perfectly reproducible for me, and they make perfect sense too. 2.6.5-aa4 is the same as 2.6.5-aa3 for this benchmark (though I'll upload 2.6.5-aa4 in a few hours). - 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/