From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751605AbdGZMCY (ORCPT ); Wed, 26 Jul 2017 08:02:24 -0400 Received: from mx1.redhat.com ([209.132.183.28]:49796 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751568AbdGZMCX (ORCPT ); Wed, 26 Jul 2017 08:02:23 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 4BFE53E2A9 Authentication-Results: ext-mx06.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=kernel.org Authentication-Results: ext-mx06.extmail.prod.ext.phx2.redhat.com; spf=none smtp.mailfrom=jolsa@kernel.org DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 4BFE53E2A9 From: Jiri Olsa To: Arnaldo Carvalho de Melo Cc: lkml , Ingo Molnar , Peter Zijlstra , Alexander Shishkin , Namhyung Kim , David Ahern , Andi Kleen Subject: [PATCHv2 0/4] perf stat: Enable group read of counters Date: Wed, 26 Jul 2017 14:02:03 +0200 Message-Id: <20170726120206.9099-1-jolsa@kernel.org> X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Wed, 26 Jul 2017 12:02:23 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org hi, sending changes to enable group read of perf counters for perf stat command. It allows us to read whole group of counters within single read syscall. v2 changes: - fixed release segfault reported by Arnaldo - rebased to latest Arnaldo's perf/core - patch 1 already merged in Also available in here: git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git perf/stat_group Not sure why we haven't supported yet, but anyway it was unavailable for some time due to a bug which was fixed just recently via: ba5213ae6b88 ("perf/core: Correct event creation with PERF_FORMAT_GROUP") thanks, jirka --- Jiri Olsa (3): perf tools: Add perf_evsel__read_size function perf tools: Add perf_evsel__read_counter function perf stat: Use group read for event groups tools/perf/builtin-stat.c | 30 ++++++++++++++++++++--- tools/perf/util/counts.h | 1 + tools/perf/util/evsel.c | 139 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++- tools/perf/util/evsel.h | 2 ++ tools/perf/util/stat.c | 4 +++ tools/perf/util/stat.h | 5 ++-- 6 files changed, 175 insertions(+), 6 deletions(-)