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 */ 8 static struct ctx { 9 struct test_overhead *skel; 10 struct counter hits; 11 int fd; 12 } ctx; 13 14 static 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 26 static 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 41 static void measure(struct bench_res *res) 42 { 43 res->hits = atomic_swap(&ctx.hits.value, 0); 44 } 45 46 static 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 63 static 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 74 static void setup_base(void) 75 { 76 setup_ctx(); 77 } 78 79 static void setup_kprobe(void) 80 { 81 setup_ctx(); 82 attach_bpf(ctx.skel->progs.prog1); 83 } 84 85 static void setup_kretprobe(void) 86 { 87 setup_ctx(); 88 attach_bpf(ctx.skel->progs.prog2); 89 } 90 91 static void setup_rawtp(void) 92 { 93 setup_ctx(); 94 attach_bpf(ctx.skel->progs.prog3); 95 } 96 97 static void setup_fentry(void) 98 { 99 setup_ctx(); 100 attach_bpf(ctx.skel->progs.prog4); 101 } 102 103 static void setup_fexit(void) 104 { 105 setup_ctx(); 106 attach_bpf(ctx.skel->progs.prog5); 107 } 108 109 const 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 }; 118 119 const 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 }; 128 129 const 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 }; 138 139 const 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 }; 148 149 const 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 }; 158 159 const 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