From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751161AbbHQR6n (ORCPT ); Mon, 17 Aug 2015 13:58:43 -0400 Received: from mail.kernel.org ([198.145.29.136]:39524 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750710AbbHQR6m (ORCPT ); Mon, 17 Aug 2015 13:58:42 -0400 Date: Mon, 17 Aug 2015 14:58:36 -0300 From: Arnaldo Carvalho de Melo To: Adrian Hunter Cc: Ingo Molnar , linux-kernel@vger.kernel.org, Jiri Olsa Subject: Re: [PATCH V8 08/25] perf tools: Add Intel BTS support Message-ID: <20150817175836.GB30444@kernel.org> References: <1437150840-31811-1-git-send-email-adrian.hunter@intel.com> <1437150840-31811-9-git-send-email-adrian.hunter@intel.com> <20150817155243.GA30444@kernel.org> <55D21D2D.5010409@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <55D21D2D.5010409@intel.com> X-Url: http://acmel.wordpress.com 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 Em Mon, Aug 17, 2015 at 08:43:09PM +0300, Adrian Hunter escreveu: > On 17/08/2015 6:52 p.m., Arnaldo Carvalho de Melo wrote: > > 1.92% usleep [unknown] [.] 0x00007fa0ff695086 > > 1.60% usleep [unknown] [.] 0xffffffff811c91d0 > > 1.48% usleep [unknown] [.] 0x00007fa0ffb3030d > > 1.24% usleep [unknown] [.] 0x00007fa0ff6950c7 > It is very weird that it doesn't know the dso. > I presume there is nothing unusual about the environment e.g. in a chroot or anything > What if you try a different event e.g. perf record --per-thread -e cycles sleep 1 [root@zoo ~]# perf record --per-thread -e cycles sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.014 MB perf.data (9 samples) ] [root@zoo ~]# perf report | grep -v ^# | head -5 42.57% sleep libc-2.20.so [.] malloc_hook_ini 41.81% sleep [kernel.vmlinux] [k] filemap_fault 14.35% sleep [kernel.vmlinux] [k] flush_tlb_mm_range 1.18% sleep [kernel.vmlinux] [k] strlcpy 0.09% sleep [kernel.vmlinux] [k] native_write_msr_safe [root@zoo ~]# [root@zoo ~]# perf report --dsos libc-2.20.so | grep -v '^[#]' 42.57% sleep [.] malloc_hook_ini [root@zoo ~]# [root@zoo ~]# perf record --per-thread -e intel_bts// usleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 1.825 MB perf.data ] [root@zoo ~]# perf report | grep -v ^# | head -5 Warning: 79074 instruction trace errors 2.80% usleep [unknown] [.] 0x00007f48888aa061 [root@zoo ~]# - Arnaldo