| 1 | #include <stdio.h> |
| 2 | #include <stdlib.h> |
| 3 | #include <unistd.h> |
| 4 | #include <fcntl.h> |
| 5 | #include <string.h> |
| 6 | #include <errno.h> |
| 7 | #include <signal.h> |
| 8 | #include <time.h> |
| 9 | #include <sys/time.h> |
| 10 | #include <sys/types.h> |
| 11 | #include <sys/stat.h> |
| 12 | #include <sys/wait.h> |
| 13 | #include <semaphore.h> |
| 14 | #include <sys/ipc.h> |
| 15 | #include <sys/shm.h> |
| 16 | #include <asm/unistd.h> |
| 17 | |
| 18 | /* |
| 19 | * assume we don't have _get either, if _set isn't defined |
| 20 | */ |
| 21 | #ifndef __NR_ioprio_set |
| 22 | |
| 23 | #if defined(__i386__) |
| 24 | #define __NR_ioprio_set 289 |
| 25 | #define __NR_ioprio_get 290 |
| 26 | #elif defined(__powerpc__) || defined(__powerpc64__) |
| 27 | #define __NR_ioprio_set 273 |
| 28 | #define __NR_ioprio_get 274 |
| 29 | #elif defined(__x86_64__) |
| 30 | #define __NR_ioprio_set 251 |
| 31 | #define __NR_ioprio_get 252 |
| 32 | #elif defined(__ia64__) |
| 33 | #define __NR_ioprio_set 1274 |
| 34 | #define __NR_ioprio_get 1275 |
| 35 | #elif defined(__alpha__) |
| 36 | #define __NR_ioprio_set 442 |
| 37 | #define __NR_ioprio_get 443 |
| 38 | #elif defined(__s390x__) || defined(__s390__) |
| 39 | #define __NR_ioprio_set 282 |
| 40 | #define __NR_ioprio_get 283 |
| 41 | #else |
| 42 | #error "Unsupported arch" |
| 43 | #endif |
| 44 | |
| 45 | #endif |
| 46 | |
| 47 | static int ioprio_set(int which, int who, int ioprio) |
| 48 | { |
| 49 | return syscall(__NR_ioprio_set, which, who, ioprio); |
| 50 | } |
| 51 | |
| 52 | enum { |
| 53 | IOPRIO_WHO_PROCESS = 1, |
| 54 | IOPRIO_WHO_PGRP, |
| 55 | IOPRIO_WHO_USER, |
| 56 | }; |
| 57 | |
| 58 | #define IOPRIO_CLASS_SHIFT 13 |
| 59 | |
| 60 | #define BS (4096) |
| 61 | #define MASK (4095) |
| 62 | |
| 63 | #define TIMEOUT (30) |
| 64 | #define MAX_THREADS (32) |
| 65 | |
| 66 | #define ALIGN(buf) (((unsigned long) (buf) + MASK) & ~(MASK)) |
| 67 | |
| 68 | static int sequential = 1; |
| 69 | static int write_stat = 0; |
| 70 | static int repeatable = 1; |
| 71 | static int thread_number; |
| 72 | static int timeout = TIMEOUT; |
| 73 | static int odirect = 1; |
| 74 | static int global_bs = BS; |
| 75 | |
| 76 | static int shm_id; |
| 77 | |
| 78 | #define DDIR_READ (0) |
| 79 | #define DDIR_WRITE (1) |
| 80 | |
| 81 | struct thread_data { |
| 82 | char file_name[256]; |
| 83 | int thread_number; |
| 84 | int error; |
| 85 | int fd; |
| 86 | int stat_fd; |
| 87 | pid_t pid; |
| 88 | int terminate; |
| 89 | int ddir; |
| 90 | int ioprio; |
| 91 | int sequential; |
| 92 | int bs; |
| 93 | int odirect; |
| 94 | int delay_sleep; |
| 95 | unsigned long max_latency; /* msec */ |
| 96 | unsigned long min_latency; /* msec */ |
| 97 | unsigned long runtime; /* sec */ |
| 98 | unsigned long blocks; |
| 99 | unsigned long blocks_read; |
| 100 | unsigned long last_block; |
| 101 | sem_t mutex; |
| 102 | sem_t done_mutex; |
| 103 | struct drand48_data random_state; |
| 104 | |
| 105 | /* |
| 106 | * bandwidth stat |
| 107 | */ |
| 108 | unsigned long stat_time; |
| 109 | unsigned long stat_time_last; |
| 110 | unsigned long stat_blocks_last; |
| 111 | }; |
| 112 | |
| 113 | static struct thread_data *threads; |
| 114 | static int thread_ddir[MAX_THREADS]; |
| 115 | |
| 116 | static sem_t startup_sem; |
| 117 | |
| 118 | void sig_handler(int sig) |
| 119 | { |
| 120 | int i; |
| 121 | |
| 122 | for (i = 0; i < thread_number; i++) { |
| 123 | struct thread_data *td = &threads[i]; |
| 124 | |
| 125 | td->terminate = 1; |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | int init_random_state(struct thread_data *td) |
| 130 | { |
| 131 | unsigned long seed = 123; |
| 132 | |
| 133 | if (td->sequential) |
| 134 | return 0; |
| 135 | |
| 136 | if (!repeatable) { |
| 137 | int fd = open("/dev/random", O_RDONLY); |
| 138 | |
| 139 | if (fd == -1) { |
| 140 | td->error = errno; |
| 141 | return 1; |
| 142 | } |
| 143 | |
| 144 | if (read(fd, &seed, sizeof(seed)) < sizeof(seed)) { |
| 145 | td->error = EIO; |
| 146 | close(fd); |
| 147 | return 1; |
| 148 | } |
| 149 | |
| 150 | close(fd); |
| 151 | } |
| 152 | |
| 153 | srand48_r(seed, &td->random_state); |
| 154 | return 0; |
| 155 | } |
| 156 | |
| 157 | void shutdown_stat_file(struct thread_data *td) |
| 158 | { |
| 159 | if (td->stat_fd != -1) { |
| 160 | fsync(td->stat_fd); |
| 161 | close(td->stat_fd); |
| 162 | } |
| 163 | } |
| 164 | |
| 165 | int init_stat_file(struct thread_data *td) |
| 166 | { |
| 167 | char *n; |
| 168 | |
| 169 | if (!write_stat) |
| 170 | return 0; |
| 171 | |
| 172 | n = malloc(256); |
| 173 | sprintf(n, "%s.stat", td->file_name); |
| 174 | td->stat_fd = open(n, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
| 175 | if (td->stat_fd == -1) { |
| 176 | free(n); |
| 177 | td->error = errno; |
| 178 | return 1; |
| 179 | } |
| 180 | |
| 181 | free(n); |
| 182 | return 0; |
| 183 | } |
| 184 | |
| 185 | unsigned long utime_since(struct timeval *s, struct timeval *e) |
| 186 | { |
| 187 | double sec, usec; |
| 188 | |
| 189 | sec = e->tv_sec - s->tv_sec; |
| 190 | usec = e->tv_usec - s->tv_usec; |
| 191 | if (sec > 0 && usec < 0) { |
| 192 | sec--; |
| 193 | usec += 1000000; |
| 194 | } |
| 195 | |
| 196 | sec *= (double) 1000000; |
| 197 | |
| 198 | return sec + usec; |
| 199 | } |
| 200 | |
| 201 | unsigned long mtime_since(struct timeval *s, struct timeval *e) |
| 202 | { |
| 203 | double sec, usec; |
| 204 | |
| 205 | sec = e->tv_sec - s->tv_sec; |
| 206 | usec = e->tv_usec - s->tv_usec; |
| 207 | if (sec > 0 && usec < 0) { |
| 208 | sec--; |
| 209 | usec += 1000000; |
| 210 | } |
| 211 | |
| 212 | sec *= (double) 1000; |
| 213 | usec /= (double) 1000; |
| 214 | |
| 215 | return sec + usec; |
| 216 | } |
| 217 | |
| 218 | unsigned long time_since(struct timeval *s, struct timeval *e) |
| 219 | { |
| 220 | double sec, usec, ret; |
| 221 | |
| 222 | sec = e->tv_sec - s->tv_sec; |
| 223 | usec = e->tv_usec - s->tv_usec; |
| 224 | if (sec > 0 && usec < 0) { |
| 225 | sec--; |
| 226 | usec += 1000000; |
| 227 | } |
| 228 | |
| 229 | ret = sec + usec / (double) 1000000; |
| 230 | if (ret < 0) |
| 231 | ret = 0; |
| 232 | |
| 233 | return (unsigned long) ret; |
| 234 | } |
| 235 | |
| 236 | unsigned long get_next_offset(struct thread_data *td) |
| 237 | { |
| 238 | unsigned long b; |
| 239 | long r; |
| 240 | |
| 241 | if (!td->sequential) { |
| 242 | lrand48_r(&td->random_state, &r); |
| 243 | b = (1+(double) (td->blocks-1) * r / (RAND_MAX+1.0)); |
| 244 | } else { |
| 245 | b = td->last_block; |
| 246 | td->last_block++; |
| 247 | } |
| 248 | |
| 249 | return b * td->bs; |
| 250 | } |
| 251 | |
| 252 | void add_stat_sample(struct thread_data *td, unsigned long block, unsigned long msec) |
| 253 | { |
| 254 | char sample[256]; |
| 255 | |
| 256 | if (!td->stat_fd) |
| 257 | return; |
| 258 | |
| 259 | #if 0 |
| 260 | sprintf(sample, "%lu, %lu\n", td->blocks_read, msec); |
| 261 | write(td->stat_fd, sample, strlen(sample)); |
| 262 | #else |
| 263 | td->stat_time += msec; |
| 264 | td->stat_time_last += msec; |
| 265 | td->stat_blocks_last++; |
| 266 | |
| 267 | if (td->stat_time_last >= 500) { |
| 268 | unsigned long rate = td->stat_blocks_last * td->bs / (td->stat_time_last); |
| 269 | |
| 270 | td->stat_time_last = 0; |
| 271 | td->stat_blocks_last = 0; |
| 272 | sprintf(sample, "%lu, %lu\n", td->stat_time, rate); |
| 273 | //sprintf(sample, "%lu, %lu\n", td->blocks_read, msec); |
| 274 | write(td->stat_fd, sample, strlen(sample)); |
| 275 | } |
| 276 | #endif |
| 277 | } |
| 278 | |
| 279 | void delay_sleep(int usec) |
| 280 | { |
| 281 | unsigned long since; |
| 282 | struct timeval start, end; |
| 283 | |
| 284 | gettimeofday(&start, NULL); |
| 285 | |
| 286 | do { |
| 287 | gettimeofday(&end, NULL); |
| 288 | |
| 289 | since = utime_since(&start, &end); |
| 290 | if (since >= usec) |
| 291 | break; |
| 292 | } while (1); |
| 293 | } |
| 294 | |
| 295 | void do_thread_io(struct thread_data *td) |
| 296 | { |
| 297 | struct timeval s, e, start; |
| 298 | char *buffer, *ptr; |
| 299 | unsigned long blocks, msec; |
| 300 | |
| 301 | ptr = malloc(td->bs+MASK); |
| 302 | buffer = (char *) ALIGN(ptr); |
| 303 | |
| 304 | gettimeofday(&start, NULL); |
| 305 | |
| 306 | for (blocks = 0; blocks < td->blocks; blocks++) { |
| 307 | off_t offset = get_next_offset(td); |
| 308 | int ret; |
| 309 | |
| 310 | if (td->terminate) |
| 311 | break; |
| 312 | |
| 313 | if (lseek(td->fd, offset, SEEK_SET) == -1) { |
| 314 | td->error = errno; |
| 315 | break; |
| 316 | } |
| 317 | |
| 318 | if (td->delay_sleep) |
| 319 | delay_sleep(td->delay_sleep); |
| 320 | |
| 321 | gettimeofday(&s, NULL); |
| 322 | |
| 323 | if (td->ddir == DDIR_READ) |
| 324 | ret = read(td->fd, buffer, td->bs); |
| 325 | else |
| 326 | ret = write(td->fd, buffer, td->bs); |
| 327 | |
| 328 | gettimeofday(&e, NULL); |
| 329 | |
| 330 | if (ret < td->bs) { |
| 331 | if (ret == -1) |
| 332 | td->error = errno; |
| 333 | break; |
| 334 | } |
| 335 | |
| 336 | msec = mtime_since(&s, &e); |
| 337 | |
| 338 | add_stat_sample(td, offset / td->bs, msec); |
| 339 | |
| 340 | td->blocks_read++; |
| 341 | |
| 342 | //if (td->ddir == DDIR_WRITE && !(td->blocks_read % 512)) |
| 343 | // fsync(td->fd); |
| 344 | |
| 345 | if (msec < td->min_latency) |
| 346 | td->min_latency = msec; |
| 347 | if (msec > td->max_latency) |
| 348 | td->max_latency = msec; |
| 349 | } |
| 350 | |
| 351 | if (td->ddir == DDIR_WRITE && !td->odirect) |
| 352 | fsync(td->fd); |
| 353 | |
| 354 | gettimeofday(&e, NULL); |
| 355 | td->runtime = mtime_since(&start, &e); |
| 356 | |
| 357 | free(ptr); |
| 358 | } |
| 359 | |
| 360 | void *thread_main(int shm_id, int offset, char *argv[]) |
| 361 | { |
| 362 | struct thread_data *td; |
| 363 | void *data; |
| 364 | struct stat *statbuf = NULL; |
| 365 | int ret = 1, flags; |
| 366 | |
| 367 | data = shmat(shm_id, NULL, 0); |
| 368 | td = data + offset * sizeof(struct thread_data); |
| 369 | td->pid = getpid(); |
| 370 | |
| 371 | printf("Thread (%s) (pid=%u) (f=%s) started\n", td->ddir == DDIR_READ ? "read" : "write", td->pid, td->file_name); |
| 372 | fflush(stdout); |
| 373 | |
| 374 | sprintf(argv[0], "%s%d\n", argv[0], offset); |
| 375 | |
| 376 | if (td->ddir == DDIR_READ) |
| 377 | flags = O_RDONLY; |
| 378 | else |
| 379 | flags = O_WRONLY | O_CREAT | O_TRUNC; |
| 380 | |
| 381 | if (td->odirect) |
| 382 | flags |= O_DIRECT; |
| 383 | |
| 384 | td->fd = open(td->file_name, flags); |
| 385 | if (td->fd == -1) { |
| 386 | td->error = errno; |
| 387 | goto err; |
| 388 | } |
| 389 | |
| 390 | if (init_random_state(td)) |
| 391 | goto out; |
| 392 | if (init_stat_file(td)) |
| 393 | goto out; |
| 394 | |
| 395 | if (td->ddir == DDIR_READ) { |
| 396 | statbuf = malloc(sizeof(*statbuf)); |
| 397 | if (fstat(td->fd, statbuf) == -1) { |
| 398 | td->error = errno; |
| 399 | goto out; |
| 400 | } |
| 401 | |
| 402 | td->blocks = statbuf->st_size / td->bs; |
| 403 | if (!td->blocks) { |
| 404 | td->error = EINVAL; |
| 405 | goto out; |
| 406 | } |
| 407 | } else |
| 408 | td->blocks = 1024 * 1024 * 1024 / td->bs; |
| 409 | |
| 410 | if (td->ioprio != -1) { |
| 411 | if (ioprio_set(IOPRIO_WHO_PROCESS, 0, td->ioprio) == -1) { |
| 412 | td->error = errno; |
| 413 | goto out; |
| 414 | } |
| 415 | } |
| 416 | |
| 417 | sem_post(&startup_sem); |
| 418 | sem_wait(&td->mutex); |
| 419 | do_thread_io(td); |
| 420 | ret = 0; |
| 421 | |
| 422 | out: |
| 423 | close(td->fd); |
| 424 | if (statbuf) |
| 425 | free(statbuf); |
| 426 | shutdown_stat_file(td); |
| 427 | err: |
| 428 | sem_post(&td->done_mutex); |
| 429 | if (ret) |
| 430 | sem_post(&startup_sem); |
| 431 | shmdt(td); |
| 432 | return NULL; |
| 433 | } |
| 434 | |
| 435 | void free_shm(void) |
| 436 | { |
| 437 | shmdt(threads); |
| 438 | } |
| 439 | |
| 440 | void show_thread_status(struct thread_data *td) |
| 441 | { |
| 442 | int prio, prio_class; |
| 443 | unsigned long bw = 0; |
| 444 | |
| 445 | if (td->runtime) |
| 446 | bw = (td->blocks_read * td->bs) / td->runtime; |
| 447 | |
| 448 | prio = td->ioprio & 0xff; |
| 449 | prio_class = td->ioprio >> IOPRIO_CLASS_SHIFT; |
| 450 | |
| 451 | printf("thread%d (%s): err=%2d, prio=%1d/%1d maxl=%5lumsec, io=%6luMiB, bw=%6luKiB/sec\n", td->thread_number, td->ddir == DDIR_READ ? " read": "write", td->error, prio_class, prio, td->max_latency, td->blocks_read * td->bs >> 20, bw); |
| 452 | } |
| 453 | |
| 454 | void usage(char *progname) |
| 455 | { |
| 456 | printf("%s: <-s 0/1> <-b kb> <-t sec> <-w 0/1> <-c r,w,r...> file0... fileN\n", progname); |
| 457 | } |
| 458 | |
| 459 | void add_job(const char *filename, int rw, int bs, int direct, int prio, int random, int delay) |
| 460 | { |
| 461 | struct thread_data *td = &threads[thread_number]; |
| 462 | |
| 463 | strcpy(td->file_name, filename); |
| 464 | td->thread_number = thread_number + 1; |
| 465 | td->stat_fd = -1; |
| 466 | sem_init(&td->mutex, 1, 1); |
| 467 | sem_init(&td->done_mutex, 1, 0); |
| 468 | td->min_latency = 10000000; |
| 469 | td->ddir = rw; |
| 470 | td->ioprio = prio; |
| 471 | td->sequential = !random; |
| 472 | td->odirect = direct; |
| 473 | td->bs = bs; |
| 474 | td->delay_sleep = delay; |
| 475 | |
| 476 | thread_number++; |
| 477 | } |
| 478 | |
| 479 | void fill_option(const char *input, char *output) |
| 480 | { |
| 481 | int i; |
| 482 | |
| 483 | i = 0; |
| 484 | while (input[i] != ',' && input[i] != '}' && input[i] != '\0') { |
| 485 | output[i] = input[i]; |
| 486 | i++; |
| 487 | } |
| 488 | |
| 489 | output[i] = '\0'; |
| 490 | } |
| 491 | |
| 492 | /* |
| 493 | * job key words: |
| 494 | * |
| 495 | * file= |
| 496 | * bs= |
| 497 | * rw= |
| 498 | * direct= |
| 499 | */ |
| 500 | int parse_jobs(int argc, char *argv[], int index) |
| 501 | { |
| 502 | int rw, bs, direct, prio, random, prioclass, delay; |
| 503 | char *string, *filename, *p, *c; |
| 504 | int i; |
| 505 | |
| 506 | string = malloc(256); |
| 507 | filename = malloc(256); |
| 508 | |
| 509 | for (i = index; i < argc; i++) { |
| 510 | p = argv[i]; |
| 511 | |
| 512 | c = strpbrk(p, "{"); |
| 513 | if (!c) |
| 514 | break; |
| 515 | |
| 516 | filename[0] = 0; |
| 517 | rw = DDIR_READ; |
| 518 | bs = global_bs; |
| 519 | direct = 1; |
| 520 | prio = 4; |
| 521 | random = !sequential; |
| 522 | prioclass = 2; |
| 523 | delay = 0; |
| 524 | |
| 525 | c = strstr(p, "rw="); |
| 526 | if (c) { |
| 527 | c += 3; |
| 528 | if (*c == '0') |
| 529 | rw = DDIR_READ; |
| 530 | else |
| 531 | rw = DDIR_WRITE; |
| 532 | } |
| 533 | |
| 534 | c = strstr(p, "prio="); |
| 535 | if (c) { |
| 536 | c += 5; |
| 537 | prio = *c - '0'; |
| 538 | } |
| 539 | |
| 540 | c = strstr(p, "prioclass="); |
| 541 | if (c) { |
| 542 | c += 10; |
| 543 | prioclass = *c - '0'; |
| 544 | } |
| 545 | |
| 546 | c = strstr(p, "file="); |
| 547 | if (c) { |
| 548 | c += 5; |
| 549 | fill_option(c, filename); |
| 550 | } |
| 551 | |
| 552 | c = strstr(p, "bs="); |
| 553 | if (c) { |
| 554 | c += 3; |
| 555 | fill_option(c, string); |
| 556 | bs = strtoul(string, NULL, 10); |
| 557 | bs <<= 10; |
| 558 | } |
| 559 | |
| 560 | c = strstr(p, "direct="); |
| 561 | if (c) { |
| 562 | c += 7; |
| 563 | if (*c != '0') |
| 564 | direct = 1; |
| 565 | else |
| 566 | direct = 0; |
| 567 | } |
| 568 | |
| 569 | c = strstr(p, "delay="); |
| 570 | if (c) { |
| 571 | c += 6; |
| 572 | fill_option(c, string); |
| 573 | delay = strtoul(string, NULL, 10); |
| 574 | } |
| 575 | |
| 576 | c = strstr(p, "random"); |
| 577 | if (c) |
| 578 | random = 1; |
| 579 | c = strstr(p, "sequential"); |
| 580 | if (c) |
| 581 | random = 0; |
| 582 | |
| 583 | add_job(filename, rw, bs, direct, (prioclass << IOPRIO_CLASS_SHIFT) | prio, random, delay); |
| 584 | } |
| 585 | |
| 586 | return thread_number; |
| 587 | } |
| 588 | |
| 589 | int parse_options(int argc, char *argv[]) |
| 590 | { |
| 591 | int i, j; |
| 592 | |
| 593 | for (i = 1; i < argc; i++) { |
| 594 | char *parm = argv[i]; |
| 595 | |
| 596 | if (parm[0] != '-') |
| 597 | break; |
| 598 | |
| 599 | parm++; |
| 600 | switch (*parm) { |
| 601 | case 's': |
| 602 | parm++; |
| 603 | sequential = !!atoi(parm); |
| 604 | break; |
| 605 | case 'b': |
| 606 | parm++; |
| 607 | global_bs = atoi(parm); |
| 608 | global_bs <<= 10; |
| 609 | break; |
| 610 | case 't': |
| 611 | parm++; |
| 612 | timeout = atoi(parm); |
| 613 | break; |
| 614 | case 'w': |
| 615 | parm++; |
| 616 | write_stat = !!atoi(parm); |
| 617 | break; |
| 618 | case 'r': |
| 619 | parm++; |
| 620 | repeatable = !!atoi(parm); |
| 621 | break; |
| 622 | case 'c': { |
| 623 | char *c; |
| 624 | j = 0; |
| 625 | parm++; |
| 626 | while ((c = strsep(&parm, ",")) != NULL) { |
| 627 | int rw = DDIR_READ; |
| 628 | |
| 629 | if (*c == '1') |
| 630 | rw = DDIR_WRITE; |
| 631 | |
| 632 | thread_ddir[j] = rw; |
| 633 | j++; |
| 634 | } |
| 635 | break; |
| 636 | } |
| 637 | case 'o': |
| 638 | parm++; |
| 639 | odirect = !!atoi(parm); |
| 640 | break; |
| 641 | default: |
| 642 | printf("bad option %s\n", argv[1]); |
| 643 | break; |
| 644 | } |
| 645 | } |
| 646 | |
| 647 | if (global_bs <= 0) |
| 648 | global_bs = BS; |
| 649 | if (timeout <= 0) |
| 650 | timeout = TIMEOUT; |
| 651 | |
| 652 | printf("%s: %s, bs=%uKiB, timeo=%u, write_stat=%u, odirect=%d\n", argv[0], sequential ? "sequential" : "random", global_bs >> 10, timeout, write_stat, odirect); |
| 653 | return i; |
| 654 | } |
| 655 | |
| 656 | int main(int argc, char *argv[]) |
| 657 | { |
| 658 | static unsigned long max_run[2], min_run[2], total_blocks[2]; |
| 659 | static unsigned long max_bw[2], min_bw[2], maxl[2], minl[2]; |
| 660 | static unsigned long read_mb, write_mb, read_agg, write_agg; |
| 661 | int i, jobs; |
| 662 | |
| 663 | if (argc - 1 > MAX_THREADS) { |
| 664 | printf("max %d threads\n", MAX_THREADS); |
| 665 | return 1; |
| 666 | } |
| 667 | |
| 668 | shm_id = shmget(0, (argc - 1) * sizeof(struct thread_data), IPC_CREAT); |
| 669 | if (shm_id == -1) { |
| 670 | perror("shmget"); |
| 671 | return 1; |
| 672 | } |
| 673 | |
| 674 | threads = shmat(shm_id, NULL, 0); |
| 675 | |
| 676 | atexit(free_shm); |
| 677 | |
| 678 | for (i = 0; i < MAX_THREADS; i++) |
| 679 | thread_ddir[i] = DDIR_READ; |
| 680 | |
| 681 | i = parse_options(argc, argv); |
| 682 | jobs = parse_jobs(argc, argv, i); |
| 683 | |
| 684 | if (!jobs) { |
| 685 | printf("Nothing to do\n"); |
| 686 | return 1; |
| 687 | } |
| 688 | |
| 689 | for (i = 0; i < jobs; i++) { |
| 690 | sem_init(&startup_sem, 1, 1); |
| 691 | |
| 692 | if (fork()) |
| 693 | sem_wait(&startup_sem); |
| 694 | else { |
| 695 | thread_main(shm_id, i, argv); |
| 696 | exit(0); |
| 697 | } |
| 698 | } |
| 699 | |
| 700 | if (!thread_number) { |
| 701 | usage(argv[0]); |
| 702 | return 1; |
| 703 | } |
| 704 | |
| 705 | signal(SIGALRM, sig_handler); |
| 706 | alarm(timeout); |
| 707 | |
| 708 | printf("Starting %d threads\n", thread_number); |
| 709 | for (i = 0; i < thread_number; i++) { |
| 710 | struct thread_data *td = &threads[i]; |
| 711 | |
| 712 | sem_post(&td->mutex); |
| 713 | } |
| 714 | |
| 715 | for (i = 0; i < thread_number; i++) { |
| 716 | struct thread_data *td = &threads[i]; |
| 717 | |
| 718 | waitpid(td->pid, NULL, 0); |
| 719 | } |
| 720 | |
| 721 | min_bw[0] = min_run[0] = ~0UL; |
| 722 | min_bw[1] = min_run[1] = ~0UL; |
| 723 | minl[0] = minl[1] = ~0UL; |
| 724 | for (i = 0; i < thread_number; i++) { |
| 725 | struct thread_data *td = &threads[i]; |
| 726 | unsigned long bw = 0; |
| 727 | |
| 728 | if (td->error) |
| 729 | continue; |
| 730 | |
| 731 | if (td->runtime < min_run[td->ddir]) |
| 732 | min_run[td->ddir] = td->runtime; |
| 733 | if (td->runtime > max_run[td->ddir]) |
| 734 | max_run[td->ddir] = td->runtime; |
| 735 | |
| 736 | if (td->runtime) |
| 737 | bw = (td->blocks_read * td->bs) / td->runtime; |
| 738 | if (bw < min_bw[td->ddir]) |
| 739 | min_bw[td->ddir] = bw; |
| 740 | if (bw > max_bw[td->ddir]) |
| 741 | max_bw[td->ddir] = bw; |
| 742 | if (td->max_latency < minl[td->ddir]) |
| 743 | minl[td->ddir] = td->max_latency; |
| 744 | if (td->max_latency > maxl[td->ddir]) |
| 745 | maxl[td->ddir] = td->max_latency; |
| 746 | |
| 747 | total_blocks[td->ddir] += td->blocks_read; |
| 748 | |
| 749 | if (td->ddir == DDIR_READ) { |
| 750 | read_mb += (td->bs * td->blocks_read) >> 20; |
| 751 | if (td->runtime) |
| 752 | read_agg += (td->blocks_read * td->bs) / td->runtime; |
| 753 | } |
| 754 | if (td->ddir == DDIR_WRITE) { |
| 755 | write_mb += (td->bs * td->blocks_read) >> 20; |
| 756 | if (td->runtime) |
| 757 | write_agg += (td->blocks_read * td->bs) / td->runtime; |
| 758 | } |
| 759 | |
| 760 | show_thread_status(td); |
| 761 | } |
| 762 | |
| 763 | printf("Run status:\n"); |
| 764 | if (max_run[DDIR_READ]) |
| 765 | printf(" READ: io=%luMiB, aggrb=%lu, minl=%lu, maxl=%lu, minb=%lu, maxb=%lu, mint=%lumsec, maxt=%lumsec\n", read_mb, read_agg, minl[0], maxl[0], min_bw[0], max_bw[0], min_run[0], max_run[0]); |
| 766 | if (max_run[DDIR_WRITE]) |
| 767 | printf(" WRITE: io=%luMiB, aggrb=%lu, minl=%lu, maxl=%lu, minb=%lu, maxb=%lu, mint=%lumsec, maxt=%lumsec\n", write_mb, write_agg, minl[1], maxl[1], min_bw[1], max_bw[1], min_run[1], max_run[1]); |
| 768 | return 0; |
| 769 | } |