Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (c) 2024 Meta Platforms, Inc. and affiliates.
4 * Copyright (c) 2024 David Vernet <dvernet@meta.com>
5 */
6#include <bpf/bpf.h>
7#include <pthread.h>
8#include <scx/common.h>
9#include <sys/wait.h>
10#include <unistd.h>
11#include "maximal.bpf.skel.h"
12#include "scx_test.h"
13
14static struct maximal *skel;
15static pthread_t threads[2];
16
17bool force_exit = false;
18
19static enum scx_test_status setup(void **ctx)
20{
21 skel = maximal__open();
22 SCX_FAIL_IF(!skel, "Failed to open");
23 SCX_ENUM_INIT(skel);
24 SCX_FAIL_IF(maximal__load(skel), "Failed to load skel");
25
26 return SCX_TEST_PASS;
27}
28
29static void *do_reload_loop(void *arg)
30{
31 u32 i;
32
33 for (i = 0; i < 1024 && !force_exit; i++) {
34 struct bpf_link *link;
35
36 link = bpf_map__attach_struct_ops(skel->maps.maximal_ops);
37 if (link)
38 bpf_link__destroy(link);
39 }
40
41 return NULL;
42}
43
44static enum scx_test_status run(void *ctx)
45{
46 int err;
47 void *ret;
48
49 err = pthread_create(&threads[0], NULL, do_reload_loop, NULL);
50 SCX_FAIL_IF(err, "Failed to create thread 0");
51
52 err = pthread_create(&threads[1], NULL, do_reload_loop, NULL);
53 SCX_FAIL_IF(err, "Failed to create thread 1");
54
55 SCX_FAIL_IF(pthread_join(threads[0], &ret), "thread 0 failed");
56 SCX_FAIL_IF(pthread_join(threads[1], &ret), "thread 1 failed");
57
58 return SCX_TEST_PASS;
59}
60
61static void cleanup(void *ctx)
62{
63 force_exit = true;
64 maximal__destroy(skel);
65}
66
67struct scx_test reload_loop = {
68 .name = "reload_loop",
69 .description = "Stress test loading and unloading schedulers repeatedly in a tight loop",
70 .setup = setup,
71 .run = run,
72 .cleanup = cleanup,
73};
74REGISTER_SCX_TEST(&reload_loop)