From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754722AbbIBOUp (ORCPT ); Wed, 2 Sep 2015 10:20:45 -0400 Received: from smtp.transmode.se ([31.15.61.139]:62102 "EHLO smtp.transmode.se" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752876AbbIBOUo convert rfc822-to-8bit (ORCPT ); Wed, 2 Sep 2015 10:20:44 -0400 From: Joakim Tjernlund To: "christophe.leroy@c-s.fr" , "linuxppc-dev@lists.ozlabs.org" , "linux-kernel@vger.kernel.org" Subject: Re: Strange reports of perf events on powerpc 83xx Thread-Topic: Strange reports of perf events on powerpc 83xx Thread-Index: AQHQ4NCQ/q5R7Rw2x0SNyAdILUx6Yp4pMewA Date: Wed, 2 Sep 2015 14:20:38 +0000 Message-ID: <1441203638.3349.203.camel@transmode.se> References: <55DF17A3.7070009@c-s.fr> In-Reply-To: <55DF17A3.7070009@c-s.fr> Accept-Language: en-US, sv-SE Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: Evolution 3.16.4 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [192.168.200.4] Content-Type: text/plain; charset=US-ASCII Content-ID: <730013690DD74C4AB4859A0A3E712E9F@transmode.com> Content-Transfer-Encoding: 7BIT MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2015-08-27 at 15:58 +0200, leroy christophe wrote: > Hi, > > Has anybody already used 'perf' tool on powerpc MPC83xx ? > > I have been succesfully using perf on MPC8xx, but on MPC83xx I get > something strange. > > perf record/report reports addresses on user stack, as if it was mixing > up D accesses and I accesses. > > Any idea of what the problem can be ? We are also experiencing strange addresses on 83xx, did find the cause of this problem? We are using Linux 4.1.0 > > # Samples: 8K of event 'cpu-clock' > # Event count (approx.): 2196000000 > # > # Overhead Command Shared Object Symbol > # ........ ............ .................. > ............................................ > # > 2.62% perf_reseau4 libpthread-2.18.so [.] __libc_send > 2.56% perf_reseau4 [kernel.kallsyms] [k] __ip_make_skb > 1.62% perf_reseau4 [kernel.kallsyms] [k] __ip_append_data.isra.39 > 1.55% perf_reseau4 [kernel.kallsyms] [k] ip_finish_output > 1.33% perf_reseau4 [unknown] [k] 0x7ffffd94 > 1.33% perf_reseau4 [unknown] [k] 0x7ffffd95 > 1.28% perf_reseau4 [unknown] [k] 0x7ffffd97 > 1.26% perf_reseau4 [unknown] [k] 0x7ffffda3 > 1.24% perf_reseau4 [unknown] [k] 0x7ffffd98 > 1.22% perf_reseau4 [unknown] [k] 0x7ffffd92 > 1.22% perf_reseau4 [unknown] [k] 0x7ffffd9b > 1.22% perf_reseau4 [unknown] [k] 0x7ffffdaa > 1.21% perf_reseau4 [unknown] [k] 0x7ffffd96 > 1.18% perf_reseau4 [unknown] [k] 0x7ffffda7 > 1.17% perf_reseau4 [unknown] [k] 0x7ffffd8d > 1.17% perf_reseau4 [unknown] [k] 0x7ffffd99 > 1.13% perf_reseau4 [unknown] [k] 0x7ffffd90 > 1.13% perf_reseau4 [unknown] [k] 0x7ffffda2 > 1.12% perf_reseau4 [kernel.kallsyms] [k] __local_bh_enable_ip > 1.12% perf_reseau4 [unknown] [k] 0x7ffffd9c > 1.12% perf_reseau4 [unknown] [k] 0x7ffffd9e > 1.10% perf_reseau4 [unknown] [k] 0x7ffffda0 > 1.08% perf_reseau4 [unknown] [k] 0x7ffffd9f > 1.08% perf_reseau4 [unknown] [k] 0x7ffffda6 > 1.05% perf_reseau4 [unknown] [k] 0x7ffffda8 > 1.02% perf_reseau4 [unknown] [k] 0x7ffffd9a > 1.01% perf_reseau4 [unknown] [k] 0x7ffffdb0 > 1.00% perf_reseau4 [unknown] [k] 0x7ffffd89 > 1.00% perf_reseau4 [unknown] [k] 0x7ffffd8b > 1.00% perf_reseau4 [unknown] [k] 0x7ffffdac