From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965193AbbFJSSS (ORCPT ); Wed, 10 Jun 2015 14:18:18 -0400 Received: from mx1.redhat.com ([209.132.183.28]:48329 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934106AbbFJSNK (ORCPT ); Wed, 10 Jun 2015 14:13:10 -0400 From: Jiri Olsa To: Arnaldo Carvalho de Melo Cc: lkml , Adrian Hunter , Andi Kleen , David Ahern , Ingo Molnar , Namhyung Kim , Peter Zijlstra , Stephane Eranian Subject: [PATCH 17/25] perf stat: Introduce perf_evsel__read function Date: Wed, 10 Jun 2015 20:10:50 +0200 Message-Id: <1433959858-31858-18-git-send-email-jolsa@kernel.org> In-Reply-To: <1433959858-31858-1-git-send-email-jolsa@kernel.org> References: <1433959858-31858-1-git-send-email-jolsa@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Adding simple read function that reads/store data into given struct perf_counts_values *count object. Link: http://lkml.kernel.org/n/tip-9r2zmzq0vkw8l300usq824sg@git.kernel.org Signed-off-by: Jiri Olsa --- tools/perf/util/evsel.c | 14 ++++++++++++++ tools/perf/util/evsel.h | 3 +++ 2 files changed, 17 insertions(+) diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 1608e29ab83d..c1d210f8e799 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -1060,6 +1060,20 @@ int perf_evsel__read_cb(struct perf_evsel *evsel, int cpu, int thread, return cb(evsel, cpu, thread, &count); } +int perf_evsel__read(struct perf_evsel *evsel, int cpu, int thread, + struct perf_counts_values *count) +{ + memset(count, 0, sizeof(*count)); + + if (FD(evsel, cpu, thread) < 0) + return -EINVAL; + + if (readn(FD(evsel, cpu, thread), count, sizeof(*count)) < 0) + return -errno; + + return 0; +} + int __perf_evsel__read_on_cpu(struct perf_evsel *evsel, int cpu, int thread, bool scale) { diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h index 80929965f0f5..9609df91abc1 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -275,6 +275,9 @@ typedef int (perf_evsel__read_cb_t)(struct perf_evsel *evsel, int perf_evsel__read_cb(struct perf_evsel *evsel, int cpu, int thread, perf_evsel__read_cb_t cb); +int perf_evsel__read(struct perf_evsel *evsel, int cpu, int thread, + struct perf_counts_values *count); + int __perf_evsel__read_on_cpu(struct perf_evsel *evsel, int cpu, int thread, bool scale); -- 1.9.3