Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754545AbdHVBZs (ORCPT ); Mon, 21 Aug 2017 21:25:48 -0400 Received: from one.firstfloor.org ([193.170.194.197]:56870 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754494AbdHVBZr (ORCPT ); Mon, 21 Aug 2017 21:25:47 -0400 Date: Mon, 21 Aug 2017 18:25:45 -0700 From: Andi Kleen To: Stephane Eranian Cc: Andi Kleen , LKML , Arnaldo Carvalho de Melo , Peter Zijlstra , "mingo@elte.hu" , "Liang, Kan" , Jiri Olsa Subject: Re: [PATCH] perf record: enable multiplexing scaling via -R Message-ID: <20170822012545.GJ2482@two.firstfloor.org> References: <1503342849-2036-1-git-send-email-eranian@google.com> <87wp5wr0cb.fsf@firstfloor.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 759 Lines: 23 On Mon, Aug 21, 2017 at 05:13:29PM -0700, Stephane Eranian wrote: > On Mon, Aug 21, 2017 at 4:02 PM, Andi Kleen wrote: > > > > Stephane Eranian writes: > > > > > > To activate, the user must use: > > > $ perf record -a -R .... > > > > I don't know why you're overloading the existing raw mode? > > > > It has nothing to do with that. > > > I explained this in the changelog. So that is does not change any of > the processing in perf report, i.e., no faced with data it does not > know how to handle. > Also trying to avoid adding yet another option. But raw is needed for some of the non Intel PMUs. I believe it's the only way to use AMD IBS. You may as well break their usage. You'll need a new option. -Andi