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selftests/bpf: Add stress test for timer async cancel

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Extend BPF timer selftest to run stress test for async cancel.

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/20260201025403.66625-6-alexei.starovoitov@gmail.com
This commit is contained in:
Mykyta Yatsenko 2026-01-31 18:53:59 -08:00 committed by Andrii Nakryiko
parent 10653c0dd8
commit d02fdd7195
2 changed files with 28 additions and 4 deletions
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18
tools/testing/selftests/bpf/prog_tests/timer.c
View File

@ -23,13 +23,14 @@ static void *spin_lock_thread(void *arg)
}
static int timer_stress(struct timer *timer_skel)
static int timer_stress_runner(struct timer *timer_skel, bool async_cancel)
{
int i, err = 1, prog_fd;
LIBBPF_OPTS(bpf_test_run_opts, topts);
pthread_t thread_id[NUM_THR];
void *ret;
timer_skel->bss->async_cancel = async_cancel;
prog_fd = bpf_program__fd(timer_skel->progs.race);
for (i = 0; i < NUM_THR; i++) {
err = pthread_create(&thread_id[i], NULL,
@ -46,6 +47,16 @@ static int timer_stress(struct timer *timer_skel)
return err;
}
static int timer_stress(struct timer *timer_skel)
{
return timer_stress_runner(timer_skel, false);
}
static int timer_stress_async_cancel(struct timer *timer_skel)
{
return timer_stress_runner(timer_skel, true);
}
static int timer(struct timer *timer_skel)
{
int err, prog_fd;
@ -118,6 +129,11 @@ void serial_test_timer_stress(void)
test_timer(timer_stress);
}
void serial_test_timer_stress_async_cancel(void)
{
test_timer(timer_stress_async_cancel);
}
void test_timer_interrupt(void)
{
struct timer_interrupt *skel = NULL;

14
tools/testing/selftests/bpf/progs/timer.c
View File

@ -1,13 +1,17 @@
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2021 Facebook */
#include <linux/bpf.h>
#include <time.h>
#include <vmlinux.h>
#include <stdbool.h>
#include <errno.h>
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
#define CLOCK_MONOTONIC 1
#define CLOCK_BOOTTIME 7
char _license[] SEC("license") = "GPL";
struct hmap_elem {
int counter;
struct bpf_timer timer;
@ -63,6 +67,7 @@ __u64 callback_check = 52;
__u64 callback2_check = 52;
__u64 pinned_callback_check;
__s32 pinned_cpu;
bool async_cancel = 0;
#define ARRAY 1
#define HTAB 2
@ -419,7 +424,10 @@ int race(void *ctx)
bpf_timer_set_callback(timer, race_timer_callback);
bpf_timer_start(timer, 0, 0);
bpf_timer_cancel(timer);
if (async_cancel)
bpf_timer_cancel_async(timer);
else
bpf_timer_cancel(timer);
return 0;
}