Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758290AbYCYS15 (ORCPT ); Tue, 25 Mar 2008 14:27:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753668AbYCYS1s (ORCPT ); Tue, 25 Mar 2008 14:27:48 -0400 Received: from e5.ny.us.ibm.com ([32.97.182.145]:53634 "EHLO e5.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753185AbYCYS1r (ORCPT ); Tue, 25 Mar 2008 14:27:47 -0400 Subject: Re: larger default page sizes... From: Dave Hansen To: Paul Mackerras Cc: David Miller , clameter@sgi.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org, torvalds@linux-foundation.org In-Reply-To: <18408.29107.709577.374424@cargo.ozlabs.ibm.com> References: <20080321.145712.198736315.davem@davemloft.net> <20080324.133722.38645342.davem@davemloft.net> <18408.29107.709577.374424@cargo.ozlabs.ibm.com> Content-Type: text/plain Date: Tue, 25 Mar 2008 11:27:45 -0700 Message-Id: <1206469665.27393.19.camel@nimitz.home.sr71.net> Mime-Version: 1.0 X-Mailer: Evolution 2.12.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 657 Lines: 17 On Tue, 2008-03-25 at 14:29 +1100, Paul Mackerras wrote: > 4kB pages: 444.051s user + 34.406s system time > 64kB pages: 419.963s user + 16.869s system time > > That's nearly 10% faster with 64kB pages -- on a kernel compile. Can you do the same thing with the 4k MMU pages and 64k PAGE_SIZE? Wouldn't that easily break out whether the advantage is from the TLB or from less kernel overhead? -- Dave -- 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/