1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2023 Meta Platforms, Inc. and affiliates.
* Copyright (c) 2023 David Vernet <dvernet@meta.com>
* Copyright (c) 2023 Tejun Heo <tj@kernel.org>
*/
#include <bpf/bpf.h>
#include <scx/common.h>
#include <sys/wait.h>
#include <unistd.h>
#include "enq_select_cpu.bpf.skel.h"
#include "scx_test.h"
static enum scx_test_status setup(void **ctx)
{
struct enq_select_cpu *skel;
skel = enq_select_cpu__open();
SCX_FAIL_IF(!skel, "Failed to open");
SCX_ENUM_INIT(skel);
SCX_FAIL_IF(enq_select_cpu__load(skel), "Failed to load skel");
*ctx = skel;
return SCX_TEST_PASS;
}
static int test_select_cpu_from_user(const struct enq_select_cpu *skel)
{
int fd, ret;
__u64 args[1];
LIBBPF_OPTS(bpf_test_run_opts, attr,
.ctx_in = args,
.ctx_size_in = sizeof(args),
);
args[0] = getpid();
fd = bpf_program__fd(skel->progs.select_cpu_from_user);
if (fd < 0)
return fd;
ret = bpf_prog_test_run_opts(fd, &attr);
if (ret < 0)
return ret;
fprintf(stderr, "%s: CPU %d\n", __func__, attr.retval);
return 0;
}
static enum scx_test_status run(void *ctx)
{
struct enq_select_cpu *skel = ctx;
struct bpf_link *link;
link = bpf_map__attach_struct_ops(skel->maps.enq_select_cpu_ops);
if (!link) {
SCX_ERR("Failed to attach scheduler");
return SCX_TEST_FAIL;
}
/* Pick an idle CPU from user-space */
SCX_FAIL_IF(test_select_cpu_from_user(skel), "Failed to pick idle CPU");
sleep(1);
SCX_EQ(skel->data->uei.kind, EXIT_KIND(SCX_EXIT_NONE));
bpf_link__destroy(link);
return SCX_TEST_PASS;
}
static void cleanup(void *ctx)
{
struct enq_select_cpu *skel = ctx;
enq_select_cpu__destroy(skel);
}
struct scx_test enq_select_cpu = {
.name = "enq_select_cpu",
.description = "Verify scx_bpf_select_cpu_dfl() from multiple contexts",
.setup = setup,
.run = run,
.cleanup = cleanup,
};
REGISTER_SCX_TEST(&enq_select_cpu)
|
