From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756587Ab1KIKGF (ORCPT ); Wed, 9 Nov 2011 05:06:05 -0500 Received: from casper.infradead.org ([85.118.1.10]:56018 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753979Ab1KIKGD convert rfc822-to-8bit (ORCPT ); Wed, 9 Nov 2011 05:06:03 -0500 Subject: Re: [F.A.Q.] perf ABI backwards and forwards compatibility From: Peter Zijlstra To: Ingo Molnar Cc: Pekka Enberg , "Frank Ch. Eigler" , "Ted Ts'o" , Vince Weaver , Pekka Enberg , Anthony Liguori , Avi Kivity , "kvm@vger.kernel.org list" , "linux-kernel@vger.kernel.org List" , qemu-devel Developers , Alexander Graf , Blue Swirl , =?ISO-8859-1?Q?Am=E9rico?= Wang , Linus Torvalds , Arnaldo Carvalho de Melo Date: Wed, 09 Nov 2011 11:05:29 +0100 In-Reply-To: <20111108125932.GC1022@elte.hu> References: <20111107175942.GA9395@elte.hu> <20111107203514.GG24234@thunk.org> <20111108102235.GA1241@elte.hu> <20111108113150.GA13195@redhat.com> <20111108121501.GA1022@elte.hu> <1320754825.11519.0.camel@twins> <20111108125932.GC1022@elte.hu> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT X-Mailer: Evolution 3.0.3- Message-ID: <1320833129.13360.9.camel@twins> Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 2011-11-08 at 13:59 +0100, Ingo Molnar wrote: > > > Also the self monitor stuff, perf-tool doesn't use that for obvious > > reasons. > > Indeed, and that's PAPI's strong point. > > We could try to utilize it via some clever LD_PRELOAD trickery? Wouldn't be really meaningful, a perf-test case that covers it would be much saner. From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Zijlstra Subject: Re: [F.A.Q.] perf ABI backwards and forwards compatibility Date: Wed, 09 Nov 2011 11:05:29 +0100 Message-ID: <1320833129.13360.9.camel@twins> References: <20111107175942.GA9395@elte.hu> <20111107203514.GG24234@thunk.org> <20111108102235.GA1241@elte.hu> <20111108113150.GA13195@redhat.com> <20111108121501.GA1022@elte.hu> <1320754825.11519.0.camel@twins> <20111108125932.GC1022@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Cc: Alexander Graf , Ted Ts'o , Arnaldo Carvalho de Melo , "kvm@vger.kernel.org list" , qemu-devel Developers , Vince Weaver , "linux-kernel@vger.kernel.org List" , Pekka Enberg , Blue Swirl , "Frank Ch. Eigler" , Pekka Enberg , Avi Kivity , =?ISO-8859-1?Q?Am=E9rico?= Wang , Linus Torvalds To: Ingo Molnar Return-path: In-Reply-To: <20111108125932.GC1022@elte.hu> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+gceq-qemu-devel=gmane.org@nongnu.org Sender: qemu-devel-bounces+gceq-qemu-devel=gmane.org@nongnu.org List-Id: kvm.vger.kernel.org On Tue, 2011-11-08 at 13:59 +0100, Ingo Molnar wrote: >=20 > > Also the self monitor stuff, perf-tool doesn't use that for obvious=20 > > reasons. >=20 > Indeed, and that's PAPI's strong point. >=20 > We could try to utilize it via some clever LD_PRELOAD trickery? Wouldn't be really meaningful, a perf-test case that covers it would be much saner. From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:54545) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RO52e-0005CS-4E for qemu-devel@nongnu.org; Wed, 09 Nov 2011 05:06:00 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1RO52Z-00042j-V1 for qemu-devel@nongnu.org; Wed, 09 Nov 2011 05:06:00 -0500 Received: from casper.infradead.org ([85.118.1.10]:58040) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RO52Z-00042S-L8 for qemu-devel@nongnu.org; Wed, 09 Nov 2011 05:05:55 -0500 From: Peter Zijlstra Date: Wed, 09 Nov 2011 11:05:29 +0100 In-Reply-To: <20111108125932.GC1022@elte.hu> References: <20111107175942.GA9395@elte.hu> <20111107203514.GG24234@thunk.org> <20111108102235.GA1241@elte.hu> <20111108113150.GA13195@redhat.com> <20111108121501.GA1022@elte.hu> <1320754825.11519.0.camel@twins> <20111108125932.GC1022@elte.hu> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Message-ID: <1320833129.13360.9.camel@twins> Mime-Version: 1.0 Subject: Re: [Qemu-devel] [F.A.Q.] perf ABI backwards and forwards compatibility List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Ingo Molnar Cc: Alexander Graf , Ted Ts'o , Arnaldo Carvalho de Melo , "kvm@vger.kernel.org list" , qemu-devel Developers , Vince Weaver , "linux-kernel@vger.kernel.org List" , Pekka Enberg , Blue Swirl , "Frank Ch. Eigler" , Pekka Enberg , Avi Kivity , =?ISO-8859-1?Q?Am=E9rico?= Wang , Linus Torvalds On Tue, 2011-11-08 at 13:59 +0100, Ingo Molnar wrote: >=20 > > Also the self monitor stuff, perf-tool doesn't use that for obvious=20 > > reasons. >=20 > Indeed, and that's PAPI's strong point. >=20 > We could try to utilize it via some clever LD_PRELOAD trickery? Wouldn't be really meaningful, a perf-test case that covers it would be much saner.