From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932888AbbJAHLQ (ORCPT ); Thu, 1 Oct 2015 03:11:16 -0400 Received: from terminus.zytor.com ([198.137.202.10]:44348 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753402AbbJAHLK (ORCPT ); Thu, 1 Oct 2015 03:11:10 -0400 Date: Thu, 1 Oct 2015 00:10:58 -0700 From: tip-bot for Adrian Hunter Message-ID: Cc: jolsa@redhat.com, adrian.hunter@intel.com, mingo@kernel.org, acme@redhat.com, tglx@linutronix.de, linux-kernel@vger.kernel.org, hpa@zytor.com Reply-To: jolsa@redhat.com, mingo@kernel.org, adrian.hunter@intel.com, acme@redhat.com, tglx@linutronix.de, linux-kernel@vger.kernel.org, hpa@zytor.com In-Reply-To: <560A5155.4060105@intel.com> References: <560A5155.4060105@intel.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/core] perf report: Amend documentation about max_stack and synthesized callchains Git-Commit-ID: 40862a7b793945c7080d1566ca3dc6249f3c6354 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 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 40862a7b793945c7080d1566ca3dc6249f3c6354 Gitweb: http://git.kernel.org/tip/40862a7b793945c7080d1566ca3dc6249f3c6354 Author: Adrian Hunter AuthorDate: Tue, 29 Sep 2015 11:52:37 +0300 Committer: Arnaldo Carvalho de Melo CommitDate: Wed, 30 Sep 2015 18:34:26 -0300 perf report: Amend documentation about max_stack and synthesized callchains The --max_stack option was added as an optimization to reduce processing time, so people specifying --max-stack might get a increased processing time if combined with synthesized callchains, but otherwise no real harm. A warning about setting both --max_stack and the synthesized callchains max depth seems like overkill. Amend the documentation. Reported-by: Arnaldo Carvalho de Melo Signed-off-by: Adrian Hunter Cc: Jiri Olsa Link: http://lkml.kernel.org/r/560A5155.4060105@intel.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/Documentation/perf-report.txt | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt index b941d5e..ce49903 100644 --- a/tools/perf/Documentation/perf-report.txt +++ b/tools/perf/Documentation/perf-report.txt @@ -205,6 +205,8 @@ OPTIONS beyond the specified depth will be ignored. This is a trade-off between information loss and faster processing especially for workloads that can have a very long callchain stack. + Note that when using the --itrace option the synthesized callchain size + will override this value if the synthesized callchain size is bigger. Default: 127