From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756491Ab3HLKUA (ORCPT ); Mon, 12 Aug 2013 06:20:00 -0400 Received: from terminus.zytor.com ([198.137.202.10]:47835 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756374Ab3HLKTx (ORCPT ); Mon, 12 Aug 2013 06:19:53 -0400 Date: Mon, 12 Aug 2013 03:19:16 -0700 From: tip-bot for David Ahern Message-ID: Cc: acme@redhat.com, linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@kernel.org, peterz@infradead.org, namhyung@kernel.org, runzhen@linux.vnet.ibm.com, jolsa@redhat.com, fweisbec@gmail.com, xiaoguangrong@linux.vnet.ibm.com, dsahern@gmail.com, tglx@linutronix.de Reply-To: mingo@kernel.org, hpa@zytor.com, linux-kernel@vger.kernel.org, acme@redhat.com, peterz@infradead.org, namhyung@kernel.org, jolsa@redhat.com, runzhen@linux.vnet.ibm.com, fweisbec@gmail.com, xiaoguangrong@linux.vnet.ibm.com, dsahern@gmail.com, tglx@linutronix.de In-Reply-To: <1375473947-64285-3-git-send-email-dsahern@gmail.com> References: <1375473947-64285-3-git-send-email-dsahern@gmail.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/core] perf stats: Add max and min stats Git-Commit-ID: ffe4f3c0d109dc53e1b3448ac457052107f34a84 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-4.2.7 (terminus.zytor.com [127.0.0.1]); Mon, 12 Aug 2013 03:19:23 -0700 (PDT) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: ffe4f3c0d109dc53e1b3448ac457052107f34a84 Gitweb: http://git.kernel.org/tip/ffe4f3c0d109dc53e1b3448ac457052107f34a84 Author: David Ahern AuthorDate: Fri, 2 Aug 2013 14:05:40 -0600 Committer: Arnaldo Carvalho de Melo CommitDate: Wed, 7 Aug 2013 17:35:26 -0300 perf stats: Add max and min stats Need an initialization function to set min to -1 to differentiate from an actual min of 0. Signed-off-by: David Ahern Reviewed-by: Xiao Guangrong Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Jiri Olsa Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Runzhen Wang Cc: Xiao Guangrong Link: http://lkml.kernel.org/r/1375473947-64285-3-git-send-email-dsahern@gmail.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/stat.c | 6 ++++++ tools/perf/util/stat.h | 9 +++++++++ 2 files changed, 15 insertions(+) diff --git a/tools/perf/util/stat.c b/tools/perf/util/stat.c index 7c59c28..6506b3d 100644 --- a/tools/perf/util/stat.c +++ b/tools/perf/util/stat.c @@ -10,6 +10,12 @@ void update_stats(struct stats *stats, u64 val) delta = val - stats->mean; stats->mean += delta / stats->n; stats->M2 += delta*(val - stats->mean); + + if (val > stats->max) + stats->max = val; + + if (val < stats->min) + stats->min = val; } double avg_stats(struct stats *stats) diff --git a/tools/perf/util/stat.h b/tools/perf/util/stat.h index 588367c..ae8ccd7 100644 --- a/tools/perf/util/stat.h +++ b/tools/perf/util/stat.h @@ -6,6 +6,7 @@ struct stats { double n, mean, M2; + u64 max, min; }; void update_stats(struct stats *stats, u64 val); @@ -13,4 +14,12 @@ double avg_stats(struct stats *stats); double stddev_stats(struct stats *stats); double rel_stddev_stats(double stddev, double avg); +static inline void init_stats(struct stats *stats) +{ + stats->n = 0.0; + stats->mean = 0.0; + stats->M2 = 0.0; + stats->min = (u64) -1; + stats->max = 0; +} #endif