Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753533Ab1C1Iw2 (ORCPT ); Mon, 28 Mar 2011 04:52:28 -0400 Received: from arkanian.console-pimps.org ([212.110.184.194]:56463 "EHLO arkanian.console-pimps.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753014Ab1C1Iw0 (ORCPT ); Mon, 28 Mar 2011 04:52:26 -0400 Date: Mon, 28 Mar 2011 09:52:23 +0100 From: Matt Fleming To: Peter Zijlstra Cc: Masami Hiramatsu , Lin Ming , mingo@elte.hu, Arnaldo Carvalho de Melo , Frederic Weisbecker , LKML , Paul Mackerras , Stephane Eranian , Steven Rostedt , Thomas Gleixner , Hitoshi Mitake , Corey Ashford , "2nddept-manager@sdl.hitachi.co.jp" <2nddept-manager@sdl.hitachi.co.jp> Subject: Re: [RFC] perf: EBNF for event syntax Message-ID: <20110328095223.76e4debe@mfleming-mobl1.ger.corp.intel.com> In-Reply-To: <1301299090.4859.6.camel@twins> References: <1300851416.31224.58.camel@minggr.sh.intel.com> <1301051277.2250.195.camel@laptop> <4D901F58.4060902@hitachi.com> <1301299090.4859.6.camel@twins> X-Mailer: Claws Mail 3.7.8cvs52 (GTK+ 2.22.0; x86_64-unknown-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 914 Lines: 22 On Mon, 28 Mar 2011 09:58:10 +0200 Peter Zijlstra wrote: > Groups are most useful in measuring events on another base, which is > basically mandatory if your primary event doesn't have sampling > support itself. Just FYI... When I was looking at group event support for SH (because the hardware doesn't have sampling support) I was trying to avoid the user being required to setup the groups on the command-line, e.g. I wrote it so that the group event creation was all done "behind the scenes". For those architectures/platforms that are missing sampling support I still think that group event creation should be as invisible as possible. -- 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/