Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754601AbXFYBR5 (ORCPT ); Sun, 24 Jun 2007 21:17:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751962AbXFYBRs (ORCPT ); Sun, 24 Jun 2007 21:17:48 -0400 Received: from pentafluge.infradead.org ([213.146.154.40]:59866 "EHLO pentafluge.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751742AbXFYBRs (ORCPT ); Sun, 24 Jun 2007 21:17:48 -0400 Subject: Re: -Os versus -O2 From: Arjan van de Ven To: david@lang.hm Cc: Adrian Bunk , Benjamin LaHaise , Oleg Verych , rae l , linux-kernel@vger.kernel.org In-Reply-To: References: <467cac85.081b600a.5b88.457f@mx.google.com> <91b13c310706240558p70dbaed2g570b57ab480aa974@mail.gmail.com> <20070624222518.GA10398@flower.upol.cz> <1182723318.6819.5.camel@laptopd505.fenrus.org> <20070624232314.GA971@kvack.org> <1182730156.6819.8.camel@laptopd505.fenrus.org> <20070625001203.GB971@kvack.org> <1182731022.6819.10.camel@laptopd505.fenrus.org> <20070625004106.GA1094@stusta.de> <1182733127.6819.13.camel@laptopd505.fenrus.org> Content-Type: text/plain Organization: Intel International BV Date: Sun, 24 Jun 2007 18:17:20 -0700 Message-Id: <1182734240.26621.2.camel@laptopd505.fenrus.org> Mime-Version: 1.0 X-Mailer: Evolution 2.10.2 (2.10.2-2.fc7) Content-Transfer-Encoding: 7bit X-SRS-Rewrite: SMTP reverse-path rewritten from by pentafluge.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1373 Lines: 30 On Sun, 2007-06-24 at 18:08 -0700, david@lang.hm wrote: > > > > on a system level, size can help performance because you have more > > memory available for other things. It also reduces download size and > > gives you more space on the live CD.... > > > > if you want to make things bigger again, please do this OUTSIDE the > > "optimize for size" option. Because that TELLS you to go for size. > > then do we need a new option 'optimize for best overall performance' that > goes for size (and the corresponding wins there) most of the time, but is > ignored where it makes a huge difference? that isn't so easy. Anything which doesn't have a performance tradeoff is in -O2 already. So every single thing in -Os costs you performance on a micro level. The translation to macro level depends greatly on how things are used (you even have to factor in download times etc)... so that is a fair question to leave up to the user... which is what there is today. -- if you want to mail me at work (you don't), use arjan (at) linux.intel.com Test the interaction between Linux and your BIOS via http://www.linuxfirmwarekit.org - 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/