| 1 | #include <stdio.h> |
| 2 | #include <stdlib.h> |
| 3 | #include <unistd.h> |
| 4 | #include <limits.h> |
| 5 | #include <string.h> |
| 6 | #include <getopt.h> |
| 7 | #include <errno.h> |
| 8 | #include <fcntl.h> |
| 9 | #include <sys/poll.h> |
| 10 | #include <sys/stat.h> |
| 11 | #include <sys/types.h> |
| 12 | #include <sys/wait.h> |
| 13 | #include <sys/time.h> |
| 14 | #include <sys/mman.h> |
| 15 | #include <signal.h> |
| 16 | #include <netinet/in.h> |
| 17 | #include <arpa/inet.h> |
| 18 | #include <netdb.h> |
| 19 | #include <sched.h> |
| 20 | |
| 21 | #include "splice.h" |
| 22 | |
| 23 | static int nr_clients = 8; |
| 24 | static int net_port = 8888; |
| 25 | static int client_loops = 10; |
| 26 | static int bind_cpu; |
| 27 | static int write_to_null; |
| 28 | static int same_file; |
| 29 | static int splice_size = SPLICE_SIZE; |
| 30 | static char *filename = "splice-file"; |
| 31 | static unsigned int max_client_run = 15; |
| 32 | static int run_rw = 1; |
| 33 | static int run_splice = 1; |
| 34 | static int run_mmap = 1; |
| 35 | |
| 36 | static int nr_cpus; |
| 37 | |
| 38 | static int usage(char *name) |
| 39 | { |
| 40 | fprintf(stderr, "Usage %s [options] [filename]:\n", name); |
| 41 | fprintf(stderr, "\t[-n] (number of clients]\n"); |
| 42 | fprintf(stderr, "\t[-p] (port number)\n"); |
| 43 | fprintf(stderr, "\t[-l] (number of loops)\n"); |
| 44 | fprintf(stderr, "\t[-z] (write to /dev/null)\n"); |
| 45 | fprintf(stderr, "\t[-s] (use 1 file for all)\n"); |
| 46 | fprintf(stderr, "\t[-a] (set CPU affinity)\n"); |
| 47 | fprintf(stderr, "\t[-b] (splice chunk size)\n"); |
| 48 | fprintf(stderr, "\t[-t] (max client runtime in seconds)\n"); |
| 49 | fprintf(stderr, "\t[-c] (clients to run (rw/mmap/splice)\n"); |
| 50 | return 1; |
| 51 | } |
| 52 | |
| 53 | static int parse_options(int argc, char *argv[]) |
| 54 | { |
| 55 | int c, index = 1; |
| 56 | |
| 57 | while ((c = getopt(argc, argv, "n:p:l:azsb:t:c:")) != -1) { |
| 58 | switch (c) { |
| 59 | case 'n': |
| 60 | nr_clients = atoi(optarg); |
| 61 | index++; |
| 62 | break; |
| 63 | case 'p': |
| 64 | net_port = atoi(optarg); |
| 65 | index++; |
| 66 | break; |
| 67 | case 'l': |
| 68 | client_loops = atoi(optarg); |
| 69 | index++; |
| 70 | break; |
| 71 | case 'a': |
| 72 | bind_cpu = 1; |
| 73 | index++; |
| 74 | break; |
| 75 | case 'z': |
| 76 | write_to_null = 1; |
| 77 | index++; |
| 78 | break; |
| 79 | case 's': |
| 80 | same_file = 1; |
| 81 | index++; |
| 82 | break; |
| 83 | case 'b': |
| 84 | splice_size = atoi(optarg); |
| 85 | index++; |
| 86 | break; |
| 87 | case 't': |
| 88 | max_client_run = atoi(optarg); |
| 89 | index++; |
| 90 | break; |
| 91 | case 'c': |
| 92 | if (!strstr(optarg, "rw")) |
| 93 | run_rw = 0; |
| 94 | if (!strstr(optarg, "splice")) |
| 95 | run_splice = 0; |
| 96 | if (!strstr(optarg, "mmap")) |
| 97 | run_mmap = 0; |
| 98 | index++; |
| 99 | break; |
| 100 | default: |
| 101 | return -1; |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | return index; |
| 106 | } |
| 107 | |
| 108 | static int bind_to_cpu(int index) |
| 109 | { |
| 110 | cpu_set_t cpu_mask; |
| 111 | pid_t pid; |
| 112 | int cpu; |
| 113 | |
| 114 | if (!bind_cpu || nr_cpus == 1) |
| 115 | return 0; |
| 116 | |
| 117 | cpu = index % nr_cpus; |
| 118 | |
| 119 | CPU_ZERO(&cpu_mask); |
| 120 | CPU_SET((cpu), &cpu_mask); |
| 121 | |
| 122 | pid = getpid(); |
| 123 | if (sched_setaffinity(pid, sizeof(cpu_mask), &cpu_mask) == -1) |
| 124 | return error("set affinity"); |
| 125 | |
| 126 | return 0; |
| 127 | } |
| 128 | |
| 129 | static int accept_loop(int listen_sk) |
| 130 | { |
| 131 | struct sockaddr addr; |
| 132 | unsigned int len = sizeof(addr); |
| 133 | int sk; |
| 134 | |
| 135 | again: |
| 136 | sk = accept(listen_sk, &addr, &len); |
| 137 | if (sk < 0) |
| 138 | return error("accept"); |
| 139 | |
| 140 | /* read forever */ |
| 141 | for (;;) { |
| 142 | int ret = recv(sk, NULL, 128*1024*1024, MSG_TRUNC); |
| 143 | if (ret > 0) |
| 144 | continue; |
| 145 | else if (!ret) |
| 146 | break; |
| 147 | if (errno == EAGAIN || errno == EINTR) |
| 148 | continue; |
| 149 | break; |
| 150 | } |
| 151 | |
| 152 | close(sk); |
| 153 | goto again; |
| 154 | } |
| 155 | |
| 156 | static int server(int offset) |
| 157 | { |
| 158 | struct sockaddr_in saddr_in; |
| 159 | struct sockaddr addr; |
| 160 | unsigned int len; |
| 161 | int sk, opt; |
| 162 | |
| 163 | bind_to_cpu(offset); |
| 164 | if (nice(-20) < 0) |
| 165 | perror("nice"); |
| 166 | |
| 167 | sk = socket(PF_INET, SOCK_STREAM, 0); |
| 168 | if (sk < 0) |
| 169 | return error("socket"); |
| 170 | |
| 171 | opt = 1; |
| 172 | if (setsockopt(sk, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0) |
| 173 | return error("setsockopt"); |
| 174 | |
| 175 | saddr_in.sin_addr.s_addr = htonl(INADDR_ANY); |
| 176 | saddr_in.sin_port = htons(net_port + offset); |
| 177 | |
| 178 | if (bind(sk, (struct sockaddr *) &saddr_in, sizeof(saddr_in)) < 0) |
| 179 | return error("bind"); |
| 180 | |
| 181 | if (listen(sk, 1) < 0) |
| 182 | return error("listen"); |
| 183 | |
| 184 | len = sizeof(addr); |
| 185 | if (getsockname(sk, &addr, &len) < 0) |
| 186 | return error("getsockname"); |
| 187 | |
| 188 | return accept_loop(sk); |
| 189 | } |
| 190 | |
| 191 | static unsigned long mtime_since(struct timeval *s, struct timeval *e) |
| 192 | { |
| 193 | double sec, usec; |
| 194 | |
| 195 | sec = e->tv_sec - s->tv_sec; |
| 196 | usec = e->tv_usec - s->tv_usec; |
| 197 | if (sec > 0 && usec < 0) { |
| 198 | sec--; |
| 199 | usec += 1000000; |
| 200 | } |
| 201 | |
| 202 | sec *= (double) 1000; |
| 203 | usec /= (double) 1000; |
| 204 | |
| 205 | return sec + usec; |
| 206 | } |
| 207 | |
| 208 | static unsigned long mtime_since_now(struct timeval *s) |
| 209 | { |
| 210 | struct timeval t; |
| 211 | |
| 212 | gettimeofday(&t, NULL); |
| 213 | return mtime_since(s, &t); |
| 214 | } |
| 215 | |
| 216 | static int client_rw(int out_fd, int file_fd, int offset) |
| 217 | { |
| 218 | int loops = client_loops; |
| 219 | struct timeval start; |
| 220 | struct stat sb; |
| 221 | char *buf; |
| 222 | unsigned long long size; |
| 223 | unsigned long msecs; |
| 224 | |
| 225 | if (fstat(file_fd, &sb) < 0) |
| 226 | return error("fstat"); |
| 227 | |
| 228 | buf = malloc(splice_size); |
| 229 | |
| 230 | gettimeofday(&start, NULL); |
| 231 | again: |
| 232 | if (lseek(file_fd, 0, SEEK_SET) < 0) |
| 233 | return error("lseek"); |
| 234 | |
| 235 | size = sb.st_size; |
| 236 | while (size) { |
| 237 | int this_len = min(size, (unsigned long long) splice_size); |
| 238 | int ret = read(file_fd, buf, this_len); |
| 239 | |
| 240 | if (ret < 0) |
| 241 | return error("read"); |
| 242 | |
| 243 | size -= ret; |
| 244 | while (ret) { |
| 245 | int written = write(out_fd, buf, ret); |
| 246 | |
| 247 | if (written < 0) |
| 248 | return error("write"); |
| 249 | |
| 250 | ret -= written; |
| 251 | } |
| 252 | } |
| 253 | |
| 254 | loops--; |
| 255 | |
| 256 | if ((mtime_since_now(&start) < max_client_run * 1000) && loops) |
| 257 | goto again; |
| 258 | |
| 259 | free(buf); |
| 260 | size = sb.st_size >> 10; |
| 261 | size *= (client_loops - loops); |
| 262 | msecs = mtime_since_now(&start); |
| 263 | fprintf(stdout, "Client%d (rw): %Lu MiB/sec (%LuMiB in %lu msecs)\n", offset, size / (unsigned long long) msecs, size >> 10, msecs); |
| 264 | return 0; |
| 265 | } |
| 266 | |
| 267 | static int client_mmap(int out_fd, int file_fd, int offset) |
| 268 | { |
| 269 | int loops = client_loops; |
| 270 | struct timeval start; |
| 271 | struct stat sb; |
| 272 | void *mmap_area, *buf; |
| 273 | unsigned long long size; |
| 274 | unsigned long msecs; |
| 275 | |
| 276 | if (fstat(file_fd, &sb) < 0) |
| 277 | return error("fstat"); |
| 278 | |
| 279 | mmap_area = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, file_fd, 0); |
| 280 | if (mmap_area == MAP_FAILED) |
| 281 | return error("mmap"); |
| 282 | |
| 283 | if (madvise(mmap_area, sb.st_size, MADV_WILLNEED) < 0) |
| 284 | return error("madvise"); |
| 285 | |
| 286 | gettimeofday(&start, NULL); |
| 287 | again: |
| 288 | buf = mmap_area; |
| 289 | size = sb.st_size; |
| 290 | while (size) { |
| 291 | int this_len = min(size, (unsigned long long) splice_size); |
| 292 | int ret = write(out_fd, buf, this_len); |
| 293 | |
| 294 | if (ret < 0) |
| 295 | return error("write"); |
| 296 | |
| 297 | buf += ret; |
| 298 | size -= ret; |
| 299 | } |
| 300 | |
| 301 | loops--; |
| 302 | |
| 303 | if ((mtime_since_now(&start) < max_client_run * 1000) && loops) |
| 304 | goto again; |
| 305 | |
| 306 | size = sb.st_size >> 10; |
| 307 | size *= (client_loops - loops); |
| 308 | msecs = mtime_since_now(&start); |
| 309 | fprintf(stdout, "Client%d (mmap): %Lu MiB/sec (%LuMiB in %lu msecs)\n", offset, size / (unsigned long long) msecs, size >> 10, msecs); |
| 310 | munmap(mmap_area, sb.st_size); |
| 311 | return 0; |
| 312 | |
| 313 | } |
| 314 | |
| 315 | static int client_splice_loop(int out_fd, int fd, int *pfd, int offset) |
| 316 | { |
| 317 | struct timeval start; |
| 318 | unsigned long long size; |
| 319 | unsigned long msecs; |
| 320 | struct stat sb; |
| 321 | int loops = client_loops; |
| 322 | loff_t off; |
| 323 | |
| 324 | if (fstat(fd, &sb) < 0) |
| 325 | return error("fstat"); |
| 326 | |
| 327 | gettimeofday(&start, NULL); |
| 328 | again: |
| 329 | size = sb.st_size; |
| 330 | off = 0; |
| 331 | |
| 332 | do { |
| 333 | int ret = ssplice(fd, &off, pfd[1], NULL, min(size, (unsigned long long) splice_size), 0); |
| 334 | |
| 335 | if (ret <= 0) |
| 336 | return error("splice-in"); |
| 337 | |
| 338 | size -= ret; |
| 339 | while (ret > 0) { |
| 340 | int flags = size ? SPLICE_F_MORE : 0; |
| 341 | int written = ssplice(pfd[0], NULL, out_fd, NULL, ret, flags); |
| 342 | |
| 343 | if (written <= 0) |
| 344 | return error("splice-out"); |
| 345 | |
| 346 | ret -= written; |
| 347 | } |
| 348 | } while (size); |
| 349 | |
| 350 | loops--; |
| 351 | |
| 352 | if ((mtime_since_now(&start) < max_client_run * 1000) && loops) |
| 353 | goto again; |
| 354 | |
| 355 | size = sb.st_size >> 10; |
| 356 | size *= (client_loops - loops); |
| 357 | msecs = mtime_since_now(&start); |
| 358 | fprintf(stdout, "Client%d (splice): %Lu MiB/sec (%LuMiB in %lu msecs)\n", offset, size / (unsigned long long) msecs, size >> 10, msecs); |
| 359 | return 0; |
| 360 | } |
| 361 | |
| 362 | static int client_splice(int out_fd, int file_fd, int offset) |
| 363 | { |
| 364 | int pfd[2], ret; |
| 365 | |
| 366 | if (pipe(pfd) < 0) |
| 367 | return error("pipe"); |
| 368 | |
| 369 | ret = client_splice_loop(out_fd, file_fd, pfd, offset); |
| 370 | close(pfd[0]); |
| 371 | close(pfd[1]); |
| 372 | return ret; |
| 373 | } |
| 374 | |
| 375 | static int do_client(int out_fd, int file_fd, int offset) |
| 376 | { |
| 377 | int ret; |
| 378 | |
| 379 | if (run_splice) { |
| 380 | ret = client_splice(out_fd, file_fd, offset); |
| 381 | if (ret) |
| 382 | return ret; |
| 383 | } |
| 384 | if (run_mmap) { |
| 385 | ret = client_mmap(out_fd, file_fd, offset); |
| 386 | if (ret) |
| 387 | return ret; |
| 388 | } |
| 389 | if (run_rw) { |
| 390 | ret = client_rw(out_fd, file_fd, offset); |
| 391 | if (ret) |
| 392 | return ret; |
| 393 | } |
| 394 | return 0; |
| 395 | } |
| 396 | |
| 397 | static int client_open_net(int offset) |
| 398 | { |
| 399 | int sk = socket(PF_INET, SOCK_STREAM, 0); |
| 400 | struct sockaddr_in s_to; |
| 401 | struct hostent *hp; |
| 402 | |
| 403 | hp = gethostbyname("localhost"); |
| 404 | if (!hp) |
| 405 | return error("gethostbyname"); |
| 406 | |
| 407 | bzero((char *) &s_to, sizeof (s_to)); |
| 408 | bcopy((char *) hp->h_addr, (char *) &(s_to.sin_addr), hp->h_length); |
| 409 | s_to.sin_family = hp->h_addrtype; |
| 410 | s_to.sin_port = htons(net_port + offset); |
| 411 | |
| 412 | if (connect(sk, (struct sockaddr *)&s_to, sizeof(s_to)) < 0) |
| 413 | return error("connect"); |
| 414 | |
| 415 | return sk; |
| 416 | } |
| 417 | |
| 418 | static int client(int offset) |
| 419 | { |
| 420 | int file_fd, out_fd; |
| 421 | char fname[64]; |
| 422 | |
| 423 | bind_to_cpu(offset); |
| 424 | if (nice(-20) < 0) |
| 425 | perror("nice"); |
| 426 | |
| 427 | if (!write_to_null) |
| 428 | out_fd = client_open_net(offset); |
| 429 | else |
| 430 | out_fd = open("/dev/null", O_WRONLY); |
| 431 | |
| 432 | if (out_fd < 0) |
| 433 | return error("socket"); |
| 434 | |
| 435 | sprintf(fname, "%s%d", filename, same_file ? 0 : offset); |
| 436 | file_fd = open(fname, O_RDONLY); |
| 437 | if (file_fd < 0) |
| 438 | return error("open"); |
| 439 | |
| 440 | return do_client(out_fd, file_fd, offset); |
| 441 | } |
| 442 | |
| 443 | int main(int argc, char *argv[]) |
| 444 | { |
| 445 | pid_t *spids, *cpids; |
| 446 | int i, index; |
| 447 | |
| 448 | index = parse_options(argc, argv); |
| 449 | if (index < 0) |
| 450 | return usage(argv[0]); |
| 451 | |
| 452 | if (index < argc) |
| 453 | filename = argv[index]; |
| 454 | |
| 455 | spids = malloc(nr_clients * sizeof(pid_t)); |
| 456 | cpids = malloc(nr_clients * sizeof(pid_t)); |
| 457 | memset(spids, 0, nr_clients * sizeof(pid_t)); |
| 458 | memset(cpids, 0, nr_clients * sizeof(pid_t)); |
| 459 | |
| 460 | nr_cpus = sysconf(_SC_NPROCESSORS_ONLN); |
| 461 | if (nr_cpus < 0) |
| 462 | return error("_SC_NPROCESSORS_ONLN"); |
| 463 | |
| 464 | /* |
| 465 | * fork servers |
| 466 | */ |
| 467 | if (!write_to_null) { |
| 468 | for (i = 0; i < nr_clients; i++) { |
| 469 | pid_t pid = fork(); |
| 470 | |
| 471 | if (pid) |
| 472 | spids[i] = pid; |
| 473 | else { |
| 474 | server(i); |
| 475 | spids[i] = 0; |
| 476 | exit(0); |
| 477 | } |
| 478 | } |
| 479 | sleep(1); /* should have servers started now */ |
| 480 | } |
| 481 | |
| 482 | /* |
| 483 | * fork clients |
| 484 | */ |
| 485 | for (i = 0; i < nr_clients; i++) { |
| 486 | pid_t pid = fork(); |
| 487 | |
| 488 | if (pid) |
| 489 | cpids[i] = pid; |
| 490 | else { |
| 491 | client(i); |
| 492 | cpids[i] = 0; |
| 493 | exit(0); |
| 494 | } |
| 495 | } |
| 496 | |
| 497 | /* |
| 498 | * wait for clients to exit |
| 499 | */ |
| 500 | fprintf(stdout, "Waiting for clients\n"); |
| 501 | for (i = 0; i < nr_clients; i++) { |
| 502 | if (cpids[i]) { |
| 503 | waitpid(cpids[i], NULL, 0); |
| 504 | cpids[i] = 0; |
| 505 | } |
| 506 | } |
| 507 | |
| 508 | /* |
| 509 | * then kill servers |
| 510 | */ |
| 511 | for (i = 0; i < nr_clients; i++) { |
| 512 | if (spids[i]) { |
| 513 | kill(spids[i], SIGKILL); |
| 514 | waitpid(spids[i], NULL, 0); |
| 515 | spids[i] = 0; |
| 516 | } |
| 517 | } |
| 518 | |
| 519 | return 0; |
| 520 | } |