From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 39A7AC433FE for ; Wed, 22 Sep 2021 10:16:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2235060F44 for ; Wed, 22 Sep 2021 10:16:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234731AbhIVKSW (ORCPT ); Wed, 22 Sep 2021 06:18:22 -0400 Received: from esa3.hc1455-7.c3s2.iphmx.com ([207.54.90.49]:45530 "EHLO esa3.hc1455-7.c3s2.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234414AbhIVKSK (ORCPT ); Wed, 22 Sep 2021 06:18:10 -0400 IronPort-SDR: koZWrufzIyTEu2N0YKCBbWa0PnzM0xgihR2D9s+x5sC347COGEka9Q/00Gd+XZERvo1JMNqqWn T4nB2uE1HpTo6J4edb1NH3XHb3ExoSYuzbXRnRnHUIly3iJIZcxrUe2sHJdtB20Gspt9cn5C/K 4ZCsA8uZVvsSgdslHWNq8PZvkiY+cIwJqgDYuDHhE1SbSVFZ2eerIRJvhKQv8fIexbt31gMqZu 1K9PY8Ih4yFYl5v3Wxs/Fhh8AkANWAGi0XixUFJUE2C8e36YbX9kIWIO1tODHTsaNF7x7yXXrQ d82+R7YYRf69IhoUcnRWLeWa X-IronPort-AV: E=McAfee;i="6200,9189,10114"; a="46127437" X-IronPort-AV: E=Sophos;i="5.85,313,1624287600"; d="scan'208";a="46127437" Received: from unknown (HELO oym-r3.gw.nic.fujitsu.com) ([210.162.30.91]) by esa3.hc1455-7.c3s2.iphmx.com with ESMTP; 22 Sep 2021 19:16:33 +0900 Received: from oym-m4.gw.nic.fujitsu.com (oym-nat-oym-m4.gw.nic.fujitsu.com [192.168.87.61]) by oym-r3.gw.nic.fujitsu.com (Postfix) with ESMTP id 8EA83EBA43; Wed, 22 Sep 2021 19:16:31 +0900 (JST) Received: from yto-om2.fujitsu.com (yto-om2.o.css.fujitsu.com [10.128.89.163]) by oym-m4.gw.nic.fujitsu.com (Postfix) with ESMTP id B75802161D4; Wed, 22 Sep 2021 19:16:30 +0900 (JST) Received: from pumpkin.openstacklocal (pumpkin.fct.css.fujitsu.com [10.130.70.189]) by yto-om2.fujitsu.com (Postfix) with ESMTP id 92E1E400C0072; Wed, 22 Sep 2021 19:16:30 +0900 (JST) From: Shunsuke Nakamura To: peterz@infradead.org, mingo@redhat.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@redhat.com, namhyung@kernel.org Cc: linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org Subject: [PATCH v2 0/2] libperf: Add support for scaling counters obtained from the read() system call during multiplexing Date: Wed, 22 Sep 2021 19:16:25 +0900 Message-Id: <20210922101627.3396398-1-nakamura.shun@fujitsu.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch series supports counter scaling when perf_evsel__read() obtains a counter using the read() system call during multiplexing. The first patch adds scaling of counters obtained from the read() system call during multiplexing. The second patch adds a test for the first patch. This patch is based on Vince's rdpmc_multiplexing.c [1] --- Changes in v2: - Fix not to divide by zero when counter scaling - Add test to verify that no division by zero occurs [1] https://github.com/deater/perf_event_tests/blob/master/tests/rdpmc/rdpmc_multiplexing.c nakamura shunsuke (2): libperf: Add processing to scale the counters obtained during the read() system call when multiplexing libperf tests: Add test_stat_multiplexing test tools/lib/perf/evsel.c | 6 + tools/lib/perf/tests/test-evlist.c | 183 +++++++++++++++++++++++++++++ 2 files changed, 189 insertions(+) -- 2.27.0