Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753116Ab3EIEcY (ORCPT ); Thu, 9 May 2013 00:32:24 -0400 Received: from mail-pd0-f181.google.com ([209.85.192.181]:62527 "EHLO mail-pd0-f181.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750898Ab3EIEcV (ORCPT ); Thu, 9 May 2013 00:32:21 -0400 From: David Ahern To: linux-kernel@vger.kernel.org Cc: acme@ghostprotocols.net, mingo@kernel.org, fweisbec@gmail.com, peterz@infradead.org, jolsa@redhat.com, namhyung@kernel.org, xiaoguangrong@linux.vnet.ibm.com, David Ahern Subject: [PATCH 09/13] perf stats: add max and min stats Date: Wed, 8 May 2013 22:31:45 -0600 Message-Id: <1368073909-8825-10-git-send-email-dsahern@gmail.com> X-Mailer: git-send-email 1.7.10.1 In-Reply-To: <1368073909-8825-1-git-send-email-dsahern@gmail.com> References: <1368073909-8825-1-git-send-email-dsahern@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1886 Lines: 66 Need an initialization function to set min to -1 to differentiate from an actual min of 0. Signed-off-by: David Ahern Cc: Arnaldo Carvalho de Melo Cc: Ingo Molnar Cc: Frederic Weisbecker Cc: Peter Zijlstra Cc: Jiri Olsa Cc: Namhyung Kim Cc: Xiao Guangrong --- 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 -- 1.7.10.1 -- 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/