From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754224Ab3LJJeW (ORCPT ); Tue, 10 Dec 2013 04:34:22 -0500 Received: from terminus.zytor.com ([198.137.202.10]:44091 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752995Ab3LJJRI (ORCPT ); Tue, 10 Dec 2013 04:17:08 -0500 Date: Tue, 10 Dec 2013 01:16:45 -0800 From: tip-bot for Dongsheng Yang Message-ID: Cc: acme@redhat.com, linux-kernel@vger.kernel.org, paulus@samba.org, mingo@redhat.com, hpa@zytor.com, mingo@kernel.org, a.p.zijlstra@chello.nl, jolsa@redhat.com, dsahern@gmail.com, tglx@linutronix.de, yangds.fnst@cn.fujitsu.com Reply-To: mingo@kernel.org, hpa@zytor.com, mingo@redhat.com, paulus@samba.org, linux-kernel@vger.kernel.org, acme@redhat.com, a.p.zijlstra@chello.nl, jolsa@redhat.com, dsahern@gmail.com, tglx@linutronix.de, yangds.fnst@cn.fujitsu.com In-Reply-To: References: To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/core] perf kvm: Add more detail about buildid-list in man page Git-Commit-ID: ed086d5b8a793955981f0726d8d66a03d801279b X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.1 (terminus.zytor.com [127.0.0.1]); Tue, 10 Dec 2013 01:16:52 -0800 (PST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: ed086d5b8a793955981f0726d8d66a03d801279b Gitweb: http://git.kernel.org/tip/ed086d5b8a793955981f0726d8d66a03d801279b Author: Dongsheng Yang AuthorDate: Wed, 4 Dec 2013 17:56:42 -0500 Committer: Arnaldo Carvalho de Melo CommitDate: Wed, 4 Dec 2013 15:02:47 -0300 perf kvm: Add more detail about buildid-list in man page As the buildid is read from /sys/kernel/notes, then if we use perf kvm buildid-list with a perf data file captured by perf kvm record with --guestkallsyms and --guestmodules, there is no result in output. This patch add a explanation about it and add a limit of using perf kvm buildid-list. Signed-off-by: Dongsheng Yang Cc: David Ahern Cc: Ingo Molnar Cc: Jiri Olsa Cc: Paul Mackerras Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/d605a805486340b53bc261aa64d7632ad0a8cf53.1386197481.git.yangds.fnst@cn.fujitsu.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/Documentation/perf-kvm.txt | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/tools/perf/Documentation/perf-kvm.txt b/tools/perf/Documentation/perf-kvm.txt index 6a06cef..f52f94d 100644 --- a/tools/perf/Documentation/perf-kvm.txt +++ b/tools/perf/Documentation/perf-kvm.txt @@ -37,7 +37,9 @@ There are a couple of variants of perf kvm: 'perf kvm buildid-list' to display the buildids found in a perf data file, so that other tools can be used to fetch packages with matching symbol tables - for use by perf report. + for use by perf report. As buildid is read from /sys/kernel/notes in os, then + if you want to list the buildid for guest, please make sure your perf data file + was captured with --guestmount in perf kvm record. 'perf kvm stat ' to run a command and gather performance counter statistics.