From owner-freebsd-arch@FreeBSD.ORG Thu Nov 23 23:29:58 2006 Return-Path: X-Original-To: arch@freebsd.org Delivered-To: freebsd-arch@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id B454416A416 for ; Thu, 23 Nov 2006 23:29:58 +0000 (UTC) (envelope-from rnsanchez@wait4.org) Received: from spunkymail-a9.dreamhost.com (sd-green-bigip-202.dreamhost.com [208.97.132.202]) by mx1.FreeBSD.org (Postfix) with ESMTP id CE0EF43D46 for ; Thu, 23 Nov 2006 23:29:20 +0000 (GMT) (envelope-from rnsanchez@wait4.org) Received: from sauron.lan.box (unknown [200.180.165.63]) by spunkymail-a9.dreamhost.com (Postfix) with ESMTP id 3E90C20AEA; Thu, 23 Nov 2006 15:29:55 -0800 (PST) Date: Thu, 23 Nov 2006 21:29:52 -0200 From: Ricardo Nabinger Sanchez To: Ulrich Spoerlein Message-Id: <20061123212952.f332a7ad.rnsanchez@wait4.org> In-Reply-To: <20061122201625.GC1522@roadrunner.q.local> References: <45649E42.70409@cs.rice.edu> <20061122201625.GC1522@roadrunner.q.local> Organization: SYS_WAIT4 X-Mailer: Sylpheed version 2.3.0beta2 (GTK+ 2.10.6; i386-portbld-freebsd6.1) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: Kip Macy , Alan Cox , arch@freebsd.org Subject: Re: superpage plans X-BeenThere: freebsd-arch@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussion related to FreeBSD architecture List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 23 Nov 2006 23:29:58 -0000 On Wed, 22 Nov 2006 21:16:25 +0100 Ulrich Spoerlein wrote: > what performance impact do you estimate for "older" processors? I know > very little about superpages, so I assume that, e.g., earlier Pentiums > don't support it? Where do you think the break off point lies? Please correct me if I'm wrong, but if superpages means using 4 MB TLB pages, then it is quite old (~1993) and every pentium (i586 or newer) should support it. -- Ricardo Nabinger Sanchez Powered by FreeBSD "Left to themselves, things tend to go from bad to worse."