1// SPDX-License-Identifier: GPL-2.0
2/* Copyright (c) 2020 Facebook */
3#include <fcntl.h>
4#include "bench.h"
5#include "test_overhead.skel.h"
6
7/* BPF triggering benchmarks */
8static struct ctx {
9 struct test_overhead *skel;
10 struct counter hits;
11 int fd;
12} ctx;
13
14static void validate(void)
15{
16 if (env.producer_cnt != 1) {
17 fprintf(stderr, "benchmark doesn't support multi-producer!\n");
18 exit(1);
19 }
20 if (env.consumer_cnt != 0) {
21 fprintf(stderr, "benchmark doesn't support consumer!\n");
22 exit(1);
23 }
24}
25
26static void *producer(void *input)
27{
28 char buf[] = "test_overhead";
29 int err;
30
31 while (true) {
32 err = write(ctx.fd, buf, sizeof(buf));
33 if (err < 0) {
34 fprintf(stderr, "write failed\n");
35 exit(1);
36 }
37 atomic_inc(&ctx.hits.value);
38 }
39}
40
41static void measure(struct bench_res *res)
42{
43 res->hits = atomic_swap(&ctx.hits.value, 0);
44}
45
46static void setup_ctx(void)
47{
48 setup_libbpf();
49
50 ctx.skel = test_overhead__open_and_load();
51 if (!ctx.skel) {
52 fprintf(stderr, "failed to open skeleton\n");
53 exit(1);
54 }
55
56 ctx.fd = open("/proc/self/comm", O_WRONLY|O_TRUNC);
57 if (ctx.fd < 0) {
58 fprintf(stderr, "failed to open /proc/self/comm: %d\n", -errno);
59 exit(1);
60 }
61}
62
63static void attach_bpf(struct bpf_program *prog)
64{
65 struct bpf_link *link;
66
67 link = bpf_program__attach(prog);
68 if (!link) {
69 fprintf(stderr, "failed to attach program!\n");
70 exit(1);
71 }
72}
73
74static void setup_base(void)
75{
76 setup_ctx();
77}
78
79static void setup_kprobe(void)
80{
81 setup_ctx();
82 attach_bpf(prog: ctx.skel->progs.prog1);
83}
84
85static void setup_kretprobe(void)
86{
87 setup_ctx();
88 attach_bpf(prog: ctx.skel->progs.prog2);
89}
90
91static void setup_rawtp(void)
92{
93 setup_ctx();
94 attach_bpf(prog: ctx.skel->progs.prog3);
95}
96
97static void setup_fentry(void)
98{
99 setup_ctx();
100 attach_bpf(prog: ctx.skel->progs.prog4);
101}
102
103static void setup_fexit(void)
104{
105 setup_ctx();
106 attach_bpf(prog: ctx.skel->progs.prog5);
107}
108
109const struct bench bench_rename_base = {
110 .name = "rename-base",
111 .validate = validate,
112 .setup = setup_base,
113 .producer_thread = producer,
114 .measure = measure,
115 .report_progress = hits_drops_report_progress,
116 .report_final = hits_drops_report_final,
117};
118
119const struct bench bench_rename_kprobe = {
120 .name = "rename-kprobe",
121 .validate = validate,
122 .setup = setup_kprobe,
123 .producer_thread = producer,
124 .measure = measure,
125 .report_progress = hits_drops_report_progress,
126 .report_final = hits_drops_report_final,
127};
128
129const struct bench bench_rename_kretprobe = {
130 .name = "rename-kretprobe",
131 .validate = validate,
132 .setup = setup_kretprobe,
133 .producer_thread = producer,
134 .measure = measure,
135 .report_progress = hits_drops_report_progress,
136 .report_final = hits_drops_report_final,
137};
138
139const struct bench bench_rename_rawtp = {
140 .name = "rename-rawtp",
141 .validate = validate,
142 .setup = setup_rawtp,
143 .producer_thread = producer,
144 .measure = measure,
145 .report_progress = hits_drops_report_progress,
146 .report_final = hits_drops_report_final,
147};
148
149const struct bench bench_rename_fentry = {
150 .name = "rename-fentry",
151 .validate = validate,
152 .setup = setup_fentry,
153 .producer_thread = producer,
154 .measure = measure,
155 .report_progress = hits_drops_report_progress,
156 .report_final = hits_drops_report_final,
157};
158
159const struct bench bench_rename_fexit = {
160 .name = "rename-fexit",
161 .validate = validate,
162 .setup = setup_fexit,
163 .producer_thread = producer,
164 .measure = measure,
165 .report_progress = hits_drops_report_progress,
166 .report_final = hits_drops_report_final,
167};
168

source code of linux/tools/testing/selftests/bpf/benchs/bench_rename.c