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perf test workload: Add thread count argument to thloop

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Allow the number of threads for the thloop workload to be increased
beyond the normal 2. Add error checking to the parsed time and thread
count values.

Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
This commit is contained in:
Ian Rogers 2025-10-28 08:38:20 -07:00 committed by Namhyung Kim
parent 2fee899c06
commit 3528647874
1 changed files with 38 additions and 7 deletions
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45
tools/perf/tests/workloads/thloop.c
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@ -31,21 +31,52 @@ static void *thfunc(void *arg)
static int thloop(int argc, const char **argv)
{
int sec = 1;
pthread_t th;
int nt = 2, sec = 1, err = 1;
pthread_t *thread_list = NULL;
if (argc > 0)
sec = atoi(argv[0]);
if (sec <= 0) {
fprintf(stderr, "Error: seconds (%d) must be >= 1\n", sec);
return 1;
}
if (argc > 1)
nt = atoi(argv[1]);
if (nt <= 0) {
fprintf(stderr, "Error: thread count (%d) must be >= 1\n", nt);
return 1;
}
signal(SIGINT, sighandler);
signal(SIGALRM, sighandler);
thread_list = calloc(nt, sizeof(pthread_t));
if (thread_list == NULL) {
fprintf(stderr, "Error: malloc failed for %d threads\n", nt);
goto out;
}
for (int i = 1; i < nt; i++) {
int ret = pthread_create(&thread_list[i], NULL, thfunc, test_loop);
if (ret) {
fprintf(stderr, "Error: failed to create thread %d\n", i);
done = 1; // Ensure started threads terminate.
goto out;
}
}
alarm(sec);
pthread_create(&th, NULL, thfunc, test_loop);
test_loop();
pthread_join(th, NULL);
return 0;
err = 0;
out:
for (int i = 1; i < nt; i++) {
if (thread_list && thread_list[i])
pthread_join(thread_list[i], /*retval=*/NULL);
}
free(thread_list);
return err;
}
DEFINE_WORKLOAD(thloop);