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selftests/bpf: Refactor timer selftests

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Refactor timer selftests, extracting stress test into a separate test.
This makes it easier to debug test failures and allows to extend.

Signed-off-by: Mykyta Yatsenko <yatsenko@meta.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20260201025403.66625-5-alexei.starovoitov@gmail.com
This commit is contained in:
Mykyta Yatsenko 2026-01-31 18:53:58 -08:00 committed by Andrii Nakryiko
parent a7e172aa4c
commit 10653c0dd8
1 changed files with 36 additions and 19 deletions
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55
tools/testing/selftests/bpf/prog_tests/timer.c
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@ -22,13 +22,35 @@ static void *spin_lock_thread(void *arg)
pthread_exit(arg);
}
static int timer(struct timer *timer_skel)
static int timer_stress(struct timer *timer_skel)
{
int i, err, prog_fd;
int i, err = 1, prog_fd;
LIBBPF_OPTS(bpf_test_run_opts, topts);
pthread_t thread_id[NUM_THR];
void *ret;
prog_fd = bpf_program__fd(timer_skel->progs.race);
for (i = 0; i < NUM_THR; i++) {
err = pthread_create(&thread_id[i], NULL,
&spin_lock_thread, &prog_fd);
if (!ASSERT_OK(err, "pthread_create"))
break;
}
while (i) {
err = pthread_join(thread_id[--i], &ret);
if (ASSERT_OK(err, "pthread_join"))
ASSERT_EQ(ret, (void *)&prog_fd, "pthread_join");
}
return err;
}
static int timer(struct timer *timer_skel)
{
int err, prog_fd;
LIBBPF_OPTS(bpf_test_run_opts, topts);
err = timer__attach(timer_skel);
if (!ASSERT_OK(err, "timer_attach"))
return err;
@ -63,25 +85,10 @@ static int timer(struct timer *timer_skel)
/* check that code paths completed */
ASSERT_EQ(timer_skel->bss->ok, 1 | 2 | 4, "ok");
prog_fd = bpf_program__fd(timer_skel->progs.race);
for (i = 0; i < NUM_THR; i++) {
err = pthread_create(&thread_id[i], NULL,
&spin_lock_thread, &prog_fd);
if (!ASSERT_OK(err, "pthread_create"))
break;
}
while (i) {
err = pthread_join(thread_id[--i], &ret);
if (ASSERT_OK(err, "pthread_join"))
ASSERT_EQ(ret, (void *)&prog_fd, "pthread_join");
}
return 0;
}
/* TODO: use pid filtering */
void serial_test_timer(void)
static void test_timer(int (*timer_test_fn)(struct timer *timer_skel))
{
struct timer *timer_skel = NULL;
int err;
@ -94,13 +101,23 @@ void serial_test_timer(void)
if (!ASSERT_OK_PTR(timer_skel, "timer_skel_load"))
return;
err = timer(timer_skel);
err = timer_test_fn(timer_skel);
ASSERT_OK(err, "timer");
timer__destroy(timer_skel);
}
void serial_test_timer(void)
{
test_timer(timer);
RUN_TESTS(timer_failure);
}
void serial_test_timer_stress(void)
{
test_timer(timer_stress);
}
void test_timer_interrupt(void)
{
struct timer_interrupt *skel = NULL;