linux-kernel - [PATCH V1 03/23] perf evlist: Use libperf functions in evlist__enable_event

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Date:   Thu,  5 May 2022 19:56:19 +0300
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Jiri Olsa <jolsa@...hat.com>, Ian Rogers <irogers@...gle.com>,
        Alexey Bayduraev <alexey.v.bayduraev@...ux.intel.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Leo Yan <leo.yan@...aro.org>, linux-kernel@...r.kernel.org
Subject: [PATCH V1 03/23] perf evlist: Use libperf functions in evlist__enable_event_idx()

evlist__enable_event_idx() is used only for auxtrace events which are never
system_wide. Simplify by using libperf enable event functions.

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
---
 tools/perf/util/evlist.c | 44 ++--------------------------------------
 1 file changed, 2 insertions(+), 42 deletions(-)

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 52ea004ba01e..9fcecf7daa62 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -334,14 +334,6 @@ int evlist__add_newtp(struct evlist *evlist, const char *sys, const char *name,
 	return 0;
 }
 
-static int evlist__nr_threads(struct evlist *evlist, struct evsel *evsel)
-{
-	if (evsel->core.system_wide)
-		return 1;
-	else
-		return perf_thread_map__nr(evlist->core.threads);
-}
-
 struct evlist_cpu_iterator evlist__cpu_begin(struct evlist *evlist, struct affinity *affinity)
 {
 	struct evlist_cpu_iterator itr = {
@@ -546,46 +538,14 @@ void evlist__toggle_enable(struct evlist *evlist)
 	(evlist->enabled ? evlist__disable : evlist__enable)(evlist);
 }
 
-static int evlist__enable_event_cpu(struct evlist *evlist, struct evsel *evsel, int cpu)
-{
-	int thread;
-	int nr_threads = evlist__nr_threads(evlist, evsel);
-
-	if (!evsel->core.fd)
-		return -EINVAL;
-
-	for (thread = 0; thread < nr_threads; thread++) {
-		int err = ioctl(FD(evsel, cpu, thread), PERF_EVENT_IOC_ENABLE, 0);
-		if (err)
-			return err;
-	}
-	return 0;
-}
-
-static int evlist__enable_event_thread(struct evlist *evlist, struct evsel *evsel, int thread)
-{
-	int cpu;
-	int nr_cpus = perf_cpu_map__nr(evlist->core.user_requested_cpus);
-
-	if (!evsel->core.fd)
-		return -EINVAL;
-
-	for (cpu = 0; cpu < nr_cpus; cpu++) {
-		int err = ioctl(FD(evsel, cpu, thread), PERF_EVENT_IOC_ENABLE, 0);
-		if (err)
-			return err;
-	}
-	return 0;
-}
-
 int evlist__enable_event_idx(struct evlist *evlist, struct evsel *evsel, int idx)
 {
 	bool per_cpu_mmaps = !perf_cpu_map__empty(evlist->core.user_requested_cpus);
 
 	if (per_cpu_mmaps)
-		return evlist__enable_event_cpu(evlist, evsel, idx);
+		return perf_evsel__enable_cpu(&evsel->core, idx);
 
-	return evlist__enable_event_thread(evlist, evsel, idx);
+	return perf_evsel__enable_thread(&evsel->core, idx);
 }
 
 int evlist__add_pollfd(struct evlist *evlist, int fd)
-- 
2.25.1