Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756866Ab1ENRs3 (ORCPT ); Sat, 14 May 2011 13:48:29 -0400 Received: from mail-pz0-f46.google.com ([209.85.210.46]:49333 "EHLO mail-pz0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753753Ab1ENRs1 (ORCPT ); Sat, 14 May 2011 13:48:27 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding; b=ec3IStkhTXqXC0DoEGy6eeFpvYMCQ8p1blPXpzfnH+/BVFVMRkwvm9PFtwMgXfFLEO ZnbxeqbDHhr1MLYdZJMGf8wGdiSnBNRTEBiRhXmJheOrdmZfJquImQZ/2EVRkKbiZopY gUjPnH/0yMGxNYcPly38fUyxipkMA3WOy6zGI= Message-ID: <4DCEC068.3050301@gmail.com> Date: Sat, 14 May 2011 11:48:24 -0600 From: David Ahern User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.15) Gecko/20110421 Fedora/3.1.9-2.fc14 Thunderbird/3.1.9 MIME-Version: 1.0 To: Wim Heirman CC: Ingo Molnar , Arnaldo Carvalho de Melo , linux-kernel@vger.kernel.org, Peter Zijlstra , Thomas Gleixner , =?ISO-8859-1?Q?Fr=E9d=E9ric_Weisbecker?= , Brice Goglin Subject: Re: perf-stat per thread results References: <4DCD4FC5.8020608@gmail.com> <20110513154410.GA6373@elte.hu> <4DCDB886.7090909@gmail.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1776 Lines: 49 On 05/14/11 06:49, Wim Heirman wrote: >> Hmm.... my mileage varies using latest kernel >> (446cc6345d3de6571bdd0840f48aca441488a28d) >> >> $ /tmp/build-perf/perf record --stat -fo /tmp/perf.data -p $(pidof rsyslogd) >> ^C[ perf record: Woken up 1 times to write data ] >> [ perf record: Captured and wrote 0.007 MB /tmp/perf.data (~308 samples) ] >> >> $ /tmp/build-perf/perf report -T -i /tmp/perf.data >> # Events: 6 cycles >> # >> # Overhead Command Shared Object Symbol >> # ........ ........ ................. .......................... >> # >> 97.61% rsyslogd libc-2.13.so [.] __libc_disable_asynccancel >> 2.39% rsyslogd [kernel.kallsyms] [k] native_write_msr_safe >> >> >> # >> # (For a higher level overview, try: perf report --sort comm,dso) >> # >> # PID TID >> >> >> ie., I do not get the counter values. Specifying the counter with -e >> (e.g., -e branch-misses) does not help -- still no counter output. > > Is rsyslogd multithreaded? (Or at least, do the non-main threads > execute any work during your perf-record measurement) If not, then > what you see is consistent with what I'm getting, i.e. everything but > the main thread is reported. It is multithreaded, but my point is that I do not get counter output at the end -- the PID/TID table is empty. I do not get counters for single threaded processes nor for commands run by perf record -- e.g., /tmp/build-perf/perf record --stat -e instructions -fo /tmp/perf.data -- sleep 1 David > > Regards, > Wim -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/