Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760670AbXKMElU (ORCPT ); Mon, 12 Nov 2007 23:41:20 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755783AbXKMElM (ORCPT ); Mon, 12 Nov 2007 23:41:12 -0500 Received: from relay1.corp.sgi.com ([192.48.171.29]:40998 "EHLO relay.sgi.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1755148AbXKMElM (ORCPT ); Mon, 12 Nov 2007 23:41:12 -0500 Date: Mon, 12 Nov 2007 20:41:10 -0800 (PST) From: Christoph Lameter X-X-Sender: clameter@schroedinger.engr.sgi.com To: Ray Lee cc: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Mel Gorman , Andi Kleen , Andy Whitcroft Subject: Re: x86_64: Make sparsemem/vmemmap the default memory model In-Reply-To: <2c0942db0711122027m5b11502cveded5705c0bc4f64@mail.gmail.com> Message-ID: References: <200711130059.34346.ak@suse.de> <200711130149.54852.ak@suse.de> <2c0942db0711122027m5b11502cveded5705c0bc4f64@mail.gmail.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 612 Lines: 17 On Mon, 12 Nov 2007, Ray Lee wrote: > Discontig obviously needs to die. However, FlatMem is consistently > faster, averaging about 2.1% better overall for your numbers above. Is > the page allocator not, erm, a fast path, where that matters? > > Order Flat Sparse % diff > 0 639 641 0.3 IMHO Order 0 currently matters most and the difference is negligible there. - 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/