Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754228AbZAZTjT (ORCPT ); Mon, 26 Jan 2009 14:39:19 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751575AbZAZTjJ (ORCPT ); Mon, 26 Jan 2009 14:39:09 -0500 Received: from mga01.intel.com ([192.55.52.88]:30910 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751967AbZAZTjI convert rfc822-to-8bit (ORCPT ); Mon, 26 Jan 2009 14:39:08 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.37,327,1231142400"; d="scan'208";a="425607961" From: "Luck, Tony" To: Corey Ashford , Ingo Molnar CC: Peter Zijlstra , Andrew Morton , Papi , "David S. Miller" , Mike Galbraith , "linux-kernel@vger.kernel.org" , Eric Dumazet , Paul Mackerras , Peter Anvin , "eranian@gmail.com" , Thomas Gleixner , "perfmon2-devel@lists.sourceforge.net" , Arjan van de Ven Date: Mon, 26 Jan 2009 11:39:06 -0800 Subject: RE: [perfmon2] [announce] Performance Counters for Linux, v6 Thread-Topic: [perfmon2] [announce] Performance Counters for Linux, v6 Thread-Index: Acl/6l9347dx2B6ZQwCEaPsSFZMW0gAAZ9yw Message-ID: <57C9024A16AD2D4C97DC78E552063EA35F1F9374@orsmsx505.amr.corp.intel.com> References: <20090121185021.GA8852@elte.hu> <497D0C81.5040406@linux.vnet.ibm.com> <7c86c4470901260113r4db6b15cpa0fa88ab3f8a516c@mail.gmail.com> <20090126151746.GH9128@elte.hu> <497E0B55.4050408@linux.vnet.ibm.com> In-Reply-To: <497E0B55.4050408@linux.vnet.ibm.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 818 Lines: 18 > - or the PMU capability is expressed as a special counter type (if it's > useful enough) - and then either the write() method or ioctl is extended > to express attributes we want to set/change while a counter is running. The product of: {exotic PMU modes} * {creative performance measurement ideas} will produce a large number of candidates for these special counters (at least on ia64 ... which has a large number of exotic PMU options). I don't think that I'm qualified to judge which of them are "useful enough" to warrant a special counter type. -Tony -- 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/