1 files changed, 28 insertions, 47 deletions

diff --git a/tools/perf/util/intel-tpebs.c b/tools/perf/util/intel-tpebs.c
index e3bed86145b9..c4c818f32239 100644
--- a/tools/perf/util/intel-tpebs.c
+++ b/tools/perf/util/intel-tpebs.c
@@ -47,72 +47,53 @@ struct tpebs_retire_lat {
 	double val;
 };
 
-static int get_perf_record_args(const char **record_argv, char buf[],
-				const char *cpumap_buf)
+static int evsel__tpebs_start_perf_record(struct evsel *evsel, int control_fd[], int ack_fd[])
 {
-	struct tpebs_retire_lat *e;
-	int i = 0;
+	const char **record_argv;
+	int tpebs_event_size = 0, i = 0, ret;
+	char control_fd_buf[32];
+	char cpumap_buf[50];
+	struct tpebs_retire_lat *t;
+
+	list_for_each_entry(t, &tpebs_results, nd)
+		tpebs_event_size++;
 
-	pr_debug("tpebs: Prepare perf record for retire_latency\n");
+	record_argv = malloc((10 + 2 * tpebs_event_size) * sizeof(*record_argv));
+	if (!record_argv)
+		return -ENOMEM;
 
 	record_argv[i++] = "perf";
 	record_argv[i++] = "record";
 	record_argv[i++] = "-W";
 	record_argv[i++] = "--synth=no";
-	record_argv[i++] = buf;
 
-	if (!cpumap_buf) {
-		pr_err("tpebs: Require cpumap list to run sampling\n");
-		return -ECANCELED;
-	}
-	/* Use -C when cpumap_buf is not "-1" */
-	if (strcmp(cpumap_buf, "-1")) {
+	scnprintf(control_fd_buf, sizeof(control_fd_buf), "--control=fd:%d,%d",
+		  control_fd[0], ack_fd[1]);
+	record_argv[i++] = control_fd_buf;
+
+	record_argv[i++] = "-o";
+	record_argv[i++] = PERF_DATA;
+
+	if (!perf_cpu_map__is_any_cpu_or_is_empty(evsel->evlist->core.user_requested_cpus)) {
+		cpu_map__snprint(evsel->evlist->core.user_requested_cpus, cpumap_buf,
+				 sizeof(cpumap_buf));
 		record_argv[i++] = "-C";
 		record_argv[i++] = cpumap_buf;
 	}
 
-	list_for_each_entry(e, &tpebs_results, nd) {
+	list_for_each_entry(t, &tpebs_results, nd) {
 		record_argv[i++] = "-e";
-		record_argv[i++] = e->name;
+		record_argv[i++] = t->name;
 	}
-
-	record_argv[i++] = "-o";
-	record_argv[i++] = PERF_DATA;
-
-	return 0;
-}
-
-static int evsel__tpebs_start_perf_record(struct evsel *evsel, int control_fd[], int ack_fd[])
-{
-	const char **record_argv;
-	size_t tpebs_event_size = 0;
-	int ret;
-	char buf[32];
-	char cpumap_buf[50];
-	struct tpebs_retire_lat *t;
-
-	cpu_map__snprint(evsel->evlist->core.user_requested_cpus, cpumap_buf,
-			 sizeof(cpumap_buf));
-
-	scnprintf(buf, sizeof(buf), "--control=fd:%d,%d", control_fd[0], ack_fd[1]);
-
-	list_for_each_entry(t, &tpebs_results, nd)
-		tpebs_event_size++;
-
-	record_argv = calloc(12 + 2 * tpebs_event_size, sizeof(char *));
-	if (!record_argv)
-		return -ENOMEM;
-
-	ret = get_perf_record_args(record_argv, buf, cpumap_buf);
-	if (ret)
-		goto out;
+	record_argv[i++] = NULL;
+	assert(i == 10 + 2 * tpebs_event_size || i == 8 + 2 * tpebs_event_size);
+	/* Note, no workload given so system wide is implied. */
 
 	assert(tpebs_cmd.pid == 0);
 	tpebs_cmd.argv = record_argv;
 	tpebs_cmd.out = -1;
 	ret = start_command(&tpebs_cmd);
-out:
-	free(record_argv);
+	zfree(&tpebs_cmd.argv);
 	return ret;
 }