From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753051Ab3LKMvn (ORCPT ); Wed, 11 Dec 2013 07:51:43 -0500 Received: from mga01.intel.com ([192.55.52.88]:64865 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752430Ab3LKMko (ORCPT ); Wed, 11 Dec 2013 07:40:44 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.93,871,1378882800"; d="scan'208";a="448280708" From: Alexander Shishkin To: Peter Zijlstra , Arnaldo Carvalho de Melo Cc: Ingo Molnar , linux-kernel@vger.kernel.org, David Ahern , Frederic Weisbecker , Jiri Olsa , Mike Galbraith , Namhyung Kim , Paul Mackerras , Stephane Eranian , Andi Kleen , Adrian Hunter Subject: [PATCH v0 34/71] perf evlist: Add perf_evlist__enable_event_idx() Date: Wed, 11 Dec 2013 14:36:46 +0200 Message-Id: <1386765443-26966-35-git-send-email-alexander.shishkin@linux.intel.com> X-Mailer: git-send-email 1.8.4.rc2 In-Reply-To: <1386765443-26966-1-git-send-email-alexander.shishkin@linux.intel.com> References: <1386765443-26966-1-git-send-email-alexander.shishkin@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Adrian Hunter Add a function to enable a specific event within a specific perf event buffer. Signed-off-by: Adrian Hunter --- tools/perf/util/evlist.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++ tools/perf/util/evlist.h | 2 ++ 2 files changed, 49 insertions(+) diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index 7ae3139..e750a21 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -350,6 +350,53 @@ int perf_evlist__enable_event(struct perf_evlist *evlist, return 0; } +static int perf_evlist__enable_event_cpu(struct perf_evlist *evlist, + struct perf_evsel *evsel, int cpu) +{ + int thread, err; + int nr_threads = perf_evlist__nr_threads(evlist, evsel); + + if (!evsel->fd) + return -EINVAL; + + for (thread = 0; thread < nr_threads; thread++) { + err = ioctl(FD(evsel, cpu, thread), + PERF_EVENT_IOC_ENABLE, 0); + if (err) + return err; + } + return 0; +} + +static int perf_evlist__enable_event_thread(struct perf_evlist *evlist, + struct perf_evsel *evsel, + int thread) +{ + int cpu, err; + int nr_cpus = cpu_map__nr(evlist->cpus); + + if (!evsel->fd) + return -EINVAL; + + for (cpu = 0; cpu < nr_cpus; cpu++) { + err = ioctl(FD(evsel, cpu, thread), PERF_EVENT_IOC_ENABLE, 0); + if (err) + return err; + } + return 0; +} + +int perf_evlist__enable_event_idx(struct perf_evlist *evlist, + struct perf_evsel *evsel, int idx) +{ + bool per_cpu_mmaps = !cpu_map__empty(evlist->cpus); + + if (per_cpu_mmaps) + return perf_evlist__enable_event_cpu(evlist, evsel, idx); + else + return perf_evlist__enable_event_thread(evlist, evsel, idx); +} + static int perf_evlist__alloc_pollfd(struct perf_evlist *evlist) { int nr_cpus = cpu_map__nr(evlist->cpus); diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h index 2c8d068..f0ce3bf 100644 --- a/tools/perf/util/evlist.h +++ b/tools/perf/util/evlist.h @@ -122,6 +122,8 @@ int perf_evlist__disable_event(struct perf_evlist *evlist, struct perf_evsel *evsel); int perf_evlist__enable_event(struct perf_evlist *evlist, struct perf_evsel *evsel); +int perf_evlist__enable_event_idx(struct perf_evlist *evlist, + struct perf_evsel *evsel, int idx); void perf_evlist__set_selected(struct perf_evlist *evlist, struct perf_evsel *evsel); -- 1.8.5.1