From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754618AbbH0N7G (ORCPT ); Thu, 27 Aug 2015 09:59:06 -0400 Received: from 2.236.17.93.rev.sfr.net ([93.17.236.2]:24319 "EHLO mailhub1.si.c-s.fr" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753425AbbH0N7C (ORCPT ); Thu, 27 Aug 2015 09:59:02 -0400 To: LinuxPPC-dev , "linux-kernel@vger.kernel.org" From: leroy christophe Subject: Strange reports of perf events on powerpc 83xx Message-ID: <55DF17A3.7070009@c-s.fr> Date: Thu, 27 Aug 2015 15:58:59 +0200 User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 ? # 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 Christophe