Commit | Line | Data |
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25763b3c | 1 | // SPDX-License-Identifier: GPL-2.0-only |
39111695 | 2 | #include <stdio.h> |
39111695 AS |
3 | #include <fcntl.h> |
4 | #include <poll.h> | |
39111695 AS |
5 | #include <time.h> |
6 | #include <signal.h> | |
7cf245a3 | 7 | #include <bpf/libbpf.h> |
39111695 | 8 | |
39111695 AS |
9 | static __u64 time_get_ns(void) |
10 | { | |
11 | struct timespec ts; | |
12 | ||
13 | clock_gettime(CLOCK_MONOTONIC, &ts); | |
14 | return ts.tv_sec * 1000000000ull + ts.tv_nsec; | |
15 | } | |
16 | ||
17 | static __u64 start_time; | |
c17bec54 | 18 | static __u64 cnt; |
39111695 AS |
19 | |
20 | #define MAX_CNT 100000ll | |
21 | ||
c17bec54 | 22 | static void print_bpf_output(void *ctx, int cpu, void *data, __u32 size) |
39111695 | 23 | { |
39111695 AS |
24 | struct { |
25 | __u64 pid; | |
26 | __u64 cookie; | |
27 | } *e = data; | |
28 | ||
29 | if (e->cookie != 0x12345678) { | |
30 | printf("BUG pid %llx cookie %llx sized %d\n", | |
31 | e->pid, e->cookie, size); | |
c17bec54 | 32 | return; |
39111695 AS |
33 | } |
34 | ||
35 | cnt++; | |
36 | ||
37 | if (cnt == MAX_CNT) { | |
38 | printf("recv %lld events per sec\n", | |
39 | MAX_CNT * 1000000000ll / (time_get_ns() - start_time)); | |
c17bec54 | 40 | return; |
39111695 | 41 | } |
39111695 AS |
42 | } |
43 | ||
44 | int main(int argc, char **argv) | |
45 | { | |
3677d0a1 DL |
46 | struct bpf_link *link = NULL; |
47 | struct bpf_program *prog; | |
c17bec54 | 48 | struct perf_buffer *pb; |
3677d0a1 DL |
49 | struct bpf_object *obj; |
50 | int map_fd, ret = 0; | |
39111695 AS |
51 | char filename[256]; |
52 | FILE *f; | |
53 | ||
54 | snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); | |
3677d0a1 DL |
55 | obj = bpf_object__open_file(filename, NULL); |
56 | if (libbpf_get_error(obj)) { | |
57 | fprintf(stderr, "ERROR: opening BPF object file failed\n"); | |
58 | return 0; | |
59 | } | |
39111695 | 60 | |
3677d0a1 DL |
61 | /* load BPF program */ |
62 | if (bpf_object__load(obj)) { | |
63 | fprintf(stderr, "ERROR: loading BPF object file failed\n"); | |
64 | goto cleanup; | |
65 | } | |
66 | ||
67 | map_fd = bpf_object__find_map_fd_by_name(obj, "my_map"); | |
68 | if (map_fd < 0) { | |
69 | fprintf(stderr, "ERROR: finding a map in obj file failed\n"); | |
70 | goto cleanup; | |
71 | } | |
72 | ||
73 | prog = bpf_object__find_program_by_name(obj, "bpf_prog1"); | |
74 | if (libbpf_get_error(prog)) { | |
75 | fprintf(stderr, "ERROR: finding a prog in obj file failed\n"); | |
76 | goto cleanup; | |
77 | } | |
78 | ||
79 | link = bpf_program__attach(prog); | |
80 | if (libbpf_get_error(link)) { | |
81 | fprintf(stderr, "ERROR: bpf_program__attach failed\n"); | |
82 | link = NULL; | |
83 | goto cleanup; | |
39111695 AS |
84 | } |
85 | ||
c58f9815 | 86 | pb = perf_buffer__new(map_fd, 8, print_bpf_output, NULL, NULL, NULL); |
c17bec54 AN |
87 | ret = libbpf_get_error(pb); |
88 | if (ret) { | |
89 | printf("failed to setup perf_buffer: %d\n", ret); | |
39111695 | 90 | return 1; |
c17bec54 | 91 | } |
39111695 AS |
92 | |
93 | f = popen("taskset 1 dd if=/dev/zero of=/dev/null", "r"); | |
94 | (void) f; | |
95 | ||
96 | start_time = time_get_ns(); | |
c17bec54 AN |
97 | while ((ret = perf_buffer__poll(pb, 1000)) >= 0 && cnt < MAX_CNT) { |
98 | } | |
28dbf861 | 99 | kill(0, SIGINT); |
3677d0a1 DL |
100 | |
101 | cleanup: | |
102 | bpf_link__destroy(link); | |
103 | bpf_object__close(obj); | |
28dbf861 | 104 | return ret; |
39111695 | 105 | } |