From patchwork Sat Jun 27 15:08:16 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Lespiau, Damien" X-Patchwork-Id: 6685231 Return-Path: X-Original-To: patchwork-intel-gfx@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id A17179F1C1 for ; Sat, 27 Jun 2015 15:09:11 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id CDCEB2077A for ; Sat, 27 Jun 2015 15:09:10 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id E447D20770 for ; Sat, 27 Jun 2015 15:09:09 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id BAAB56E73C; Sat, 27 Jun 2015 08:09:08 -0700 (PDT) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTP id 964586E733 for ; Sat, 27 Jun 2015 08:09:05 -0700 (PDT) Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga101.jf.intel.com with ESMTP; 27 Jun 2015 08:09:05 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.13,689,1427785200"; d="scan'208";a="515137158" Received: from kczmudzi-mobl4.amr.corp.intel.com (HELO strange.ger.corp.intel.com) ([10.252.53.243]) by FMSMGA003.fm.intel.com with ESMTP; 27 Jun 2015 08:09:04 -0700 From: Damien Lespiau To: intel-gfx@lists.freedesktop.org Date: Sat, 27 Jun 2015 16:08:16 +0100 Message-Id: <1435417696-28115-19-git-send-email-damien.lespiau@intel.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1435417696-28115-1-git-send-email-damien.lespiau@intel.com> References: <1435417696-28115-1-git-send-email-damien.lespiau@intel.com> Subject: [Intel-gfx] [PATCH i-g-t 18/18] stats: Add support for the interquartile range (IQR) X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Spam-Status: No, score=-5.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP IQR is a good measure of dispersion. Signed-off-by: Damien Lespiau --- lib/igt_stats.c | 18 +++++++++++++++++- lib/igt_stats.h | 1 + lib/tests/igt_stats.c | 2 ++ 3 files changed, 20 insertions(+), 1 deletion(-) diff --git a/lib/igt_stats.c b/lib/igt_stats.c index 66fd563..caf3f37 100644 --- a/lib/igt_stats.c +++ b/lib/igt_stats.c @@ -216,7 +216,7 @@ uint64_t igt_stats_get_max(igt_stats_t *stats) * * The range can be a deceiving characterization of the values, because there * can be extreme minimal and maximum values that are just anomalies. Prefer - * the interquatile range or an histogram. + * the interquatile range (see igt_stats_get_iqr()) or an histogram. */ uint64_t igt_stats_get_range(igt_stats_t *stats) { @@ -340,6 +340,22 @@ void igt_stats_get_quartiles(igt_stats_t *stats, } /** + * igt_stats_get_iqr: + * @stats: An #igt_stats_t instance + * + * Retrieves the + * [interquartile range](https://en.wikipedia.org/wiki/Interquartile_range) + * (IQR) of the @stats dataset. + */ +double igt_stats_get_iqr(igt_stats_t *stats) +{ + double q1, q3; + + igt_stats_get_quartiles(stats, &q1, NULL, &q3); + return (q3 - q1); +} + +/** * igt_stats_get_median: * @stats: An #igt_stats_t instance * diff --git a/lib/igt_stats.h b/lib/igt_stats.h index 887fa79..6ee3ae6 100644 --- a/lib/igt_stats.h +++ b/lib/igt_stats.h @@ -59,6 +59,7 @@ uint64_t igt_stats_get_max(igt_stats_t *stats); uint64_t igt_stats_get_range(igt_stats_t *stats); void igt_stats_get_quartiles(igt_stats_t *stats, double *q1, double *q2, double *q3); +double igt_stats_get_iqr(igt_stats_t *stats); double igt_stats_get_mean(igt_stats_t *stats); double igt_stats_get_median(igt_stats_t *stats); double igt_stats_get_variance(igt_stats_t *stats); diff --git a/lib/tests/igt_stats.c b/lib/tests/igt_stats.c index c4c6776..c0649f3 100644 --- a/lib/tests/igt_stats.c +++ b/lib/tests/igt_stats.c @@ -102,6 +102,7 @@ static void test_quartiles(void) igt_assert_eq_double(q2, 40); igt_assert_eq_double(q3, 42.5); igt_assert_eq_double(igt_stats_get_median(&stats), 40); + igt_assert_eq_double(igt_stats_get_iqr(&stats), 42.5 - 25.5); igt_stats_fini(&stats); @@ -114,6 +115,7 @@ static void test_quartiles(void) igt_assert_eq_double(q2, 37.5); igt_assert_eq_double(q3, 40); igt_assert_eq_double(igt_stats_get_median(&stats), 37.5); + igt_assert_eq_double(igt_stats_get_iqr(&stats), 40 - 15); igt_stats_fini(&stats); }