From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758306AbcCVIsA (ORCPT ); Tue, 22 Mar 2016 04:48:00 -0400 Received: from casper.infradead.org ([85.118.1.10]:47924 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753149AbcCVIrr (ORCPT ); Tue, 22 Mar 2016 04:47:47 -0400 Date: Tue, 22 Mar 2016 09:47:43 +0100 From: Peter Zijlstra To: Jiri Olsa Cc: Andi Kleen , acme@kernel.org, jolsa@kernel.org, mingo@kernel.org, linux-kernel@vger.kernel.org, Andi Kleen Subject: Re: [PATCH 1/2] perf, tools: Document event specifications better Message-ID: <20160322084743.GH6344@twins.programming.kicks-ass.net> References: <1458575793-12091-1-git-send-email-andi@firstfloor.org> <20160322075735.GA4473@krava.brq.redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160322075735.GA4473@krava.brq.redhat.com> User-Agent: Mutt/1.5.21 (2012-12-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Mar 22, 2016 at 08:57:35AM +0100, Jiri Olsa wrote: > > +Events from multiple different PMUs cannot be mixed in a group. > > hum, but we allow that right? > > only when there's mixture of SW and HW events we move > it all silently under HW event context I forgot the exact details, but we put some tight restrictions on it. SW events can indeed be added to regular HW events, and could with some careful work be allowed on most other groups as well (but IIRC we don't currently allow them onto things like uncore etc..).