Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757452Ab1D0S0s (ORCPT ); Wed, 27 Apr 2011 14:26:48 -0400 Received: from mail-wy0-f174.google.com ([74.125.82.174]:61380 "EHLO mail-wy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757137Ab1D0S0p (ORCPT ); Wed, 27 Apr 2011 14:26:45 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=date:from:to:cc:subject:message-id:references:mime-version :content-type:content-disposition:in-reply-to:user-agent; b=L/zjVsMF0aorsUK9FafE3oKfPH1wh7RrQYJBsZbOFQust+EHz1yEy0UopjHE8BtAJw jaE2f6Jm9tkMsVxXO6fs7ehtlel3mYoVZBLoQ/jU4+KmVtf4H4nHIrvfDaoNf3ozt++Z lafC8yV4yx5oZcrexTeEq5y8TxwNEYme/l068= Date: Wed, 27 Apr 2011 20:26:41 +0200 From: Frederic Weisbecker To: "H. Peter Anvin" Cc: LKML , Ingo Molnar , Peter Zijlstra , Jason Wessel , Thomas Gleixner Subject: Re: [PATCH 3/6] x86: Allow the user not to build hw_breakpoints Message-ID: <20110427182633.GB1753@nowhere> References: <1303923602-2923-1-git-send-email-fweisbec@gmail.com> <1303923602-2923-4-git-send-email-fweisbec@gmail.com> <4DB854AA.6070101@zytor.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4DB854AA.6070101@zytor.com> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 862 Lines: 27 On Wed, Apr 27, 2011 at 10:38:50AM -0700, H. Peter Anvin wrote: > On 04/27/2011 09:59 AM, Frederic Weisbecker wrote: > > So that hw_breakpoints and perf can be not built on > > specific embedded systems. > > How big of a win, if any, is this, really? > > -hpa That's pretty significant, because if you can disable breakpoints, then you can disable perf. Together they make quite a chunk. breakpoints + perf: text data bss dec hex filename 1567422 348628 511680 2427730 250b52 vmlinux none: text data bss dec hex filename 1478031 333220 508256 2319507 236493 vmlinux -- 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/