From owner-freebsd-current@FreeBSD.ORG Wed Jun 16 10:11:53 2004 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id D011216A4CE for ; Wed, 16 Jun 2004 10:11:53 +0000 (GMT) Received: from arginine.spc.org (arginine.spc.org [195.206.69.236]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4C1E043D2D for ; Wed, 16 Jun 2004 10:11:53 +0000 (GMT) (envelope-from bms@spc.org) Received: from localhost (localhost [127.0.0.1]) by arginine.spc.org (Postfix) with ESMTP id 58C296544E; Wed, 16 Jun 2004 11:11:04 +0100 (BST) Received: from arginine.spc.org ([127.0.0.1]) by localhost (arginine.spc.org [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 92654-02-8; Wed, 16 Jun 2004 11:11:03 +0100 (BST) Received: from empiric.dek.spc.org (82-147-17-88.dsl.uk.rapidplay.com [82.147.17.88]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by arginine.spc.org (Postfix) with ESMTP id 349916542A; Wed, 16 Jun 2004 11:11:03 +0100 (BST) Received: by empiric.dek.spc.org (Postfix, from userid 1001) id 7A1E8611D; Wed, 16 Jun 2004 11:11:02 +0100 (BST) Date: Wed, 16 Jun 2004 11:11:02 +0100 From: Bruce M Simpson To: Martin Nilsson Message-ID: <20040616101102.GQ32244@empiric.dek.spc.org> References: <20040616112758.46677e25@Magellan.Leidinger.net> <40D016F2.2080904@gneto.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <40D016F2.2080904@gneto.com> cc: Alexander Leidinger cc: current@freebsd.org Subject: Re: How to determine the L2 cache size on non-AMD CPUs (automatic page queue color tuning)? X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Jun 2004 10:11:53 -0000 On Wed, Jun 16, 2004 at 11:46:26AM +0200, Martin Nilsson wrote: > The more expensive intel processors also have L3 caches of 1-4MB. > Since intels processors are built with inclusive caches (data in L2 > cache is also present in L3) shouldn't the value used be that of the > largest cache be it L2 or L3? > > How much effct on performance does a wrong cache size value have? Gag. I posted something on this whole subject last *year*, and still haven't gotten round to code. BMS