Alexei Starovoitov | e3edfde | 2016-04-06 18:43:31 -0700 | [diff] [blame] | 1 | /* Copyright (c) 2016 Facebook |
| 2 | * |
| 3 | * This program is free software; you can redistribute it and/or |
| 4 | * modify it under the terms of version 2 of the GNU General Public |
| 5 | * License as published by the Free Software Foundation. |
| 6 | */ |
| 7 | #define _GNU_SOURCE |
| 8 | #include <sched.h> |
Taeung Song | 02a2f00 | 2018-07-04 22:36:38 +0900 | [diff] [blame] | 9 | #include <errno.h> |
Alexei Starovoitov | e3edfde | 2016-04-06 18:43:31 -0700 | [diff] [blame] | 10 | #include <stdio.h> |
| 11 | #include <sys/types.h> |
| 12 | #include <asm/unistd.h> |
| 13 | #include <fcntl.h> |
| 14 | #include <unistd.h> |
| 15 | #include <assert.h> |
| 16 | #include <sys/wait.h> |
| 17 | #include <stdlib.h> |
| 18 | #include <signal.h> |
| 19 | #include <linux/bpf.h> |
| 20 | #include <string.h> |
| 21 | #include <time.h> |
| 22 | #include <sys/resource.h> |
Jakub Kicinski | 2bf3e2e | 2018-05-14 22:35:02 -0700 | [diff] [blame] | 23 | #include <bpf/bpf.h> |
Alexei Starovoitov | e3edfde | 2016-04-06 18:43:31 -0700 | [diff] [blame] | 24 | #include "bpf_load.h" |
| 25 | |
| 26 | #define MAX_CNT 1000000 |
| 27 | |
| 28 | static __u64 time_get_ns(void) |
| 29 | { |
| 30 | struct timespec ts; |
| 31 | |
| 32 | clock_gettime(CLOCK_MONOTONIC, &ts); |
| 33 | return ts.tv_sec * 1000000000ull + ts.tv_nsec; |
| 34 | } |
| 35 | |
| 36 | static void test_task_rename(int cpu) |
| 37 | { |
| 38 | __u64 start_time; |
| 39 | char buf[] = "test\n"; |
| 40 | int i, fd; |
| 41 | |
| 42 | fd = open("/proc/self/comm", O_WRONLY|O_TRUNC); |
| 43 | if (fd < 0) { |
| 44 | printf("couldn't open /proc\n"); |
| 45 | exit(1); |
| 46 | } |
| 47 | start_time = time_get_ns(); |
Taeung Song | 02a2f00 | 2018-07-04 22:36:38 +0900 | [diff] [blame] | 48 | for (i = 0; i < MAX_CNT; i++) { |
| 49 | if (write(fd, buf, sizeof(buf)) < 0) { |
| 50 | printf("task rename failed: %s\n", strerror(errno)); |
| 51 | close(fd); |
| 52 | return; |
| 53 | } |
| 54 | } |
Alexei Starovoitov | e3edfde | 2016-04-06 18:43:31 -0700 | [diff] [blame] | 55 | printf("task_rename:%d: %lld events per sec\n", |
| 56 | cpu, MAX_CNT * 1000000000ll / (time_get_ns() - start_time)); |
| 57 | close(fd); |
| 58 | } |
| 59 | |
| 60 | static void test_urandom_read(int cpu) |
| 61 | { |
| 62 | __u64 start_time; |
| 63 | char buf[4]; |
| 64 | int i, fd; |
| 65 | |
| 66 | fd = open("/dev/urandom", O_RDONLY); |
| 67 | if (fd < 0) { |
| 68 | printf("couldn't open /dev/urandom\n"); |
| 69 | exit(1); |
| 70 | } |
| 71 | start_time = time_get_ns(); |
Taeung Song | 02a2f00 | 2018-07-04 22:36:38 +0900 | [diff] [blame] | 72 | for (i = 0; i < MAX_CNT; i++) { |
| 73 | if (read(fd, buf, sizeof(buf)) < 0) { |
| 74 | printf("failed to read from /dev/urandom: %s\n", strerror(errno)); |
| 75 | close(fd); |
| 76 | return; |
| 77 | } |
| 78 | } |
Alexei Starovoitov | e3edfde | 2016-04-06 18:43:31 -0700 | [diff] [blame] | 79 | printf("urandom_read:%d: %lld events per sec\n", |
| 80 | cpu, MAX_CNT * 1000000000ll / (time_get_ns() - start_time)); |
| 81 | close(fd); |
| 82 | } |
| 83 | |
| 84 | static void loop(int cpu, int flags) |
| 85 | { |
| 86 | cpu_set_t cpuset; |
| 87 | |
| 88 | CPU_ZERO(&cpuset); |
| 89 | CPU_SET(cpu, &cpuset); |
| 90 | sched_setaffinity(0, sizeof(cpuset), &cpuset); |
| 91 | |
| 92 | if (flags & 1) |
| 93 | test_task_rename(cpu); |
| 94 | if (flags & 2) |
| 95 | test_urandom_read(cpu); |
| 96 | } |
| 97 | |
| 98 | static void run_perf_test(int tasks, int flags) |
| 99 | { |
| 100 | pid_t pid[tasks]; |
| 101 | int i; |
| 102 | |
| 103 | for (i = 0; i < tasks; i++) { |
| 104 | pid[i] = fork(); |
| 105 | if (pid[i] == 0) { |
| 106 | loop(i, flags); |
| 107 | exit(0); |
| 108 | } else if (pid[i] == -1) { |
| 109 | printf("couldn't spawn #%d process\n", i); |
| 110 | exit(1); |
| 111 | } |
| 112 | } |
| 113 | for (i = 0; i < tasks; i++) { |
| 114 | int status; |
| 115 | |
| 116 | assert(waitpid(pid[i], &status, 0) == pid[i]); |
| 117 | assert(status == 0); |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | static void unload_progs(void) |
| 122 | { |
| 123 | close(prog_fd[0]); |
| 124 | close(prog_fd[1]); |
| 125 | close(event_fd[0]); |
| 126 | close(event_fd[1]); |
| 127 | } |
| 128 | |
| 129 | int main(int argc, char **argv) |
| 130 | { |
| 131 | struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY}; |
| 132 | char filename[256]; |
| 133 | int num_cpu = 8; |
| 134 | int test_flags = ~0; |
| 135 | |
| 136 | setrlimit(RLIMIT_MEMLOCK, &r); |
| 137 | |
| 138 | if (argc > 1) |
| 139 | test_flags = atoi(argv[1]) ? : test_flags; |
| 140 | if (argc > 2) |
| 141 | num_cpu = atoi(argv[2]) ? : num_cpu; |
| 142 | |
| 143 | if (test_flags & 0x3) { |
| 144 | printf("BASE\n"); |
| 145 | run_perf_test(num_cpu, test_flags); |
| 146 | } |
| 147 | |
| 148 | if (test_flags & 0xC) { |
| 149 | snprintf(filename, sizeof(filename), |
| 150 | "%s_kprobe_kern.o", argv[0]); |
| 151 | if (load_bpf_file(filename)) { |
| 152 | printf("%s", bpf_log_buf); |
| 153 | return 1; |
| 154 | } |
| 155 | printf("w/KPROBE\n"); |
| 156 | run_perf_test(num_cpu, test_flags >> 2); |
| 157 | unload_progs(); |
| 158 | } |
| 159 | |
| 160 | if (test_flags & 0x30) { |
| 161 | snprintf(filename, sizeof(filename), |
| 162 | "%s_tp_kern.o", argv[0]); |
| 163 | if (load_bpf_file(filename)) { |
| 164 | printf("%s", bpf_log_buf); |
| 165 | return 1; |
| 166 | } |
| 167 | printf("w/TRACEPOINT\n"); |
| 168 | run_perf_test(num_cpu, test_flags >> 4); |
| 169 | unload_progs(); |
| 170 | } |
| 171 | |
Alexei Starovoitov | 4662a4e | 2018-03-28 12:05:39 -0700 | [diff] [blame] | 172 | if (test_flags & 0xC0) { |
| 173 | snprintf(filename, sizeof(filename), |
| 174 | "%s_raw_tp_kern.o", argv[0]); |
| 175 | if (load_bpf_file(filename)) { |
| 176 | printf("%s", bpf_log_buf); |
| 177 | return 1; |
| 178 | } |
| 179 | printf("w/RAW_TRACEPOINT\n"); |
| 180 | run_perf_test(num_cpu, test_flags >> 6); |
| 181 | unload_progs(); |
| 182 | } |
| 183 | |
Alexei Starovoitov | e3edfde | 2016-04-06 18:43:31 -0700 | [diff] [blame] | 184 | return 0; |
| 185 | } |