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 * Copyright (c) 2024 Tejun Heo <tj@kernel.org>
6 */
7 #include <bpf/bpf.h>
8 #include <scx/common.h>
9 #include <sys/wait.h>
10 #include <unistd.h>
11 #include "select_cpu_vtime.bpf.skel.h"
12 #include "scx_test.h"
13
14 static enum scx_test_status setup(void **ctx)
15 {
16 struct select_cpu_vtime *skel;
17
18 skel = select_cpu_vtime__open_and_load();
19 SCX_FAIL_IF(!skel, "Failed to open and load skel");
20 *ctx = skel;
21
22 return SCX_TEST_PASS;
23 }
24
25 static enum scx_test_status run(void *ctx)
26 {
27 struct select_cpu_vtime *skel = ctx;
28 struct bpf_link *link;
29
30 SCX_ASSERT(!skel->bss->consumed);
31
32 link = bpf_map__attach_struct_ops(skel->maps.select_cpu_vtime_ops);
33 SCX_FAIL_IF(!link, "Failed to attach scheduler");
34
35 sleep(1);
36
37 SCX_ASSERT(skel->bss->consumed);
38
39 bpf_link__destroy(link);
40
41 return SCX_TEST_PASS;
42 }
43
44 static void cleanup(void *ctx)
45 {
46 struct select_cpu_vtime *skel = ctx;
47
48 select_cpu_vtime__destroy(skel);
49 }
50
51 struct scx_test select_cpu_vtime = {
52 .name = "select_cpu_vtime",
53 .description = "Test doing direct vtime-dispatching from "
54 "ops.select_cpu(), to a non-built-in DSQ",
55 .setup = setup,
56 .run = run,
57 .cleanup = cleanup,
58 };
59 REGISTER_SCX_TEST(&select_cpu_vtime)
60
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