Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753910Ab1C1Fkr (ORCPT ); Mon, 28 Mar 2011 01:40:47 -0400 Received: from mail4.hitachi.co.jp ([133.145.228.5]:49303 "EHLO mail4.hitachi.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752751Ab1C1Fkq (ORCPT ); Mon, 28 Mar 2011 01:40:46 -0400 X-AuditID: b753bd60-9cf54ba000007e19-3a-4d901f5add67 X-AuditID: b753bd60-9cf54ba000007e19-3a-4d901f5add67 Message-ID: <4D901F58.4060902@hitachi.com> Date: Mon, 28 Mar 2011 14:40:40 +0900 From: Masami Hiramatsu Organization: Systems Development Lab., Hitachi, Ltd., Japan User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; ja; rv:1.9.2.15) Gecko/20110303 Thunderbird/3.1.9 MIME-Version: 1.0 To: Peter Zijlstra Cc: Lin Ming , mingo@elte.hu, Arnaldo Carvalho de Melo , Frederic Weisbecker , LKML , Paul Mackerras , Stephane Eranian , Steven Rostedt , Thomas Gleixner , Hitoshi Mitake , Corey Ashford , Matt Fleming , "2nddept-manager@sdl.hitachi.co.jp" <2nddept-manager@sdl.hitachi.co.jp> Subject: Re: [RFC] perf: EBNF for event syntax References: <1300851416.31224.58.camel@minggr.sh.intel.com> <1301051277.2250.195.camel@laptop> In-Reply-To: <1301051277.2250.195.camel@laptop> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Brightmail-Tracker: AAAAAA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1663 Lines: 50 (2011/03/25 20:07), Peter Zijlstra wrote: > On Wed, 2011-03-23 at 11:36 +0800, Lin Ming wrote: >> Hi, all >> >> On Thu, Mar 17, 2011 at 2:02 AM, Peter Zijlstra wrote: >>> How about we start writing proper EBNF syntax rules for this stuff, its >>> getting seriously out of hand. >> http://marc.info/?l=linux-kernel&m=130029871318866&w=2 >> >> As Peter suggested, I wrote a simple EBNF for event syntax, as below. >> My first plan is to pass in extra config value for some events, >> for example, offcore response and load latency. >> >> perf record -e r100b(0004):p >> >> As above, the extra config value 0004 is passed in the parentheses. >> >> The EBNF >> ======== >> >> EventList := Event [',' EventList] > > There was a suggestion a while back to make: > > -e ev1,ev2,ev3 > > create an event group with ev2 and ev3 siblings of ev1, and have > multiple -e instances create separate counters. > > The problem is that its not backwards compatible, but something like > that would still be very nice to have. I doubt that we really need to define those events are grouped at recording time, because group(event ratio) analysis must be done at analysis time(report etc.) IMHO, it should be done with a separate option instead of -e. Thank you, -- Masami HIRAMATSU 2nd Dept. Linux Technology Center Hitachi, Ltd., Systems Development Laboratory E-mail: masami.hiramatsu.pt@hitachi.com -- 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/