stat.c revision c6ae0a5b8123ea9af2ce70319081fbd5d65c8093
1#include <stdio.h> 2#include <string.h> 3#include <sys/time.h> 4#include <sys/types.h> 5#include <sys/stat.h> 6#include <dirent.h> 7#include <libgen.h> 8#include <math.h> 9 10#include "fio.h" 11 12static struct itimerval itimer; 13static struct list_head disk_list = LIST_HEAD_INIT(disk_list); 14 15static int get_io_ticks(struct disk_util *du, struct disk_util_stat *dus) 16{ 17 unsigned in_flight; 18 char line[256]; 19 FILE *f; 20 char *p; 21 22 f = fopen(du->path, "r"); 23 if (!f) 24 return 1; 25 26 p = fgets(line, sizeof(line), f); 27 if (!p) { 28 fclose(f); 29 return 1; 30 } 31 32 if (sscanf(p, "%u %u %llu %u %u %u %llu %u %u %u %u\n", &dus->ios[0], &dus->merges[0], &dus->sectors[0], &dus->ticks[0], &dus->ios[1], &dus->merges[1], &dus->sectors[1], &dus->ticks[1], &in_flight, &dus->io_ticks, &dus->time_in_queue) != 11) { 33 fclose(f); 34 return 1; 35 } 36 37 fclose(f); 38 return 0; 39} 40 41static void update_io_tick_disk(struct disk_util *du) 42{ 43 struct disk_util_stat __dus, *dus, *ldus; 44 struct timeval t; 45 46 if (get_io_ticks(du, &__dus)) 47 return; 48 49 dus = &du->dus; 50 ldus = &du->last_dus; 51 52 dus->sectors[0] += (__dus.sectors[0] - ldus->sectors[0]); 53 dus->sectors[1] += (__dus.sectors[1] - ldus->sectors[1]); 54 dus->ios[0] += (__dus.ios[0] - ldus->ios[0]); 55 dus->ios[1] += (__dus.ios[1] - ldus->ios[1]); 56 dus->merges[0] += (__dus.merges[0] - ldus->merges[0]); 57 dus->merges[1] += (__dus.merges[1] - ldus->merges[1]); 58 dus->ticks[0] += (__dus.ticks[0] - ldus->ticks[0]); 59 dus->ticks[1] += (__dus.ticks[1] - ldus->ticks[1]); 60 dus->io_ticks += (__dus.io_ticks - ldus->io_ticks); 61 dus->time_in_queue += (__dus.time_in_queue - ldus->time_in_queue); 62 63 gettimeofday(&t, NULL); 64 du->msec += mtime_since(&du->time, &t); 65 memcpy(&du->time, &t, sizeof(t)); 66 memcpy(ldus, &__dus, sizeof(__dus)); 67} 68 69void update_io_ticks(void) 70{ 71 struct list_head *entry; 72 struct disk_util *du; 73 74 list_for_each(entry, &disk_list) { 75 du = list_entry(entry, struct disk_util, list); 76 update_io_tick_disk(du); 77 } 78} 79 80static int disk_util_exists(dev_t dev) 81{ 82 struct list_head *entry; 83 struct disk_util *du; 84 85 list_for_each(entry, &disk_list) { 86 du = list_entry(entry, struct disk_util, list); 87 88 if (du->dev == dev) 89 return 1; 90 } 91 92 return 0; 93} 94 95static void disk_util_add(dev_t dev, char *path) 96{ 97 struct disk_util *du = malloc(sizeof(*du)); 98 99 memset(du, 0, sizeof(*du)); 100 INIT_LIST_HEAD(&du->list); 101 sprintf(du->path, "%s/stat", path); 102 du->name = strdup(basename(path)); 103 du->dev = dev; 104 105 gettimeofday(&du->time, NULL); 106 get_io_ticks(du, &du->last_dus); 107 108 list_add_tail(&du->list, &disk_list); 109} 110 111static int check_dev_match(dev_t dev, char *path) 112{ 113 unsigned int major, minor; 114 char line[256], *p; 115 FILE *f; 116 117 f = fopen(path, "r"); 118 if (!f) { 119 perror("open path"); 120 return 1; 121 } 122 123 p = fgets(line, sizeof(line), f); 124 if (!p) { 125 fclose(f); 126 return 1; 127 } 128 129 if (sscanf(p, "%u:%u", &major, &minor) != 2) { 130 fclose(f); 131 return 1; 132 } 133 134 if (((major << 8) | minor) == dev) { 135 fclose(f); 136 return 0; 137 } 138 139 fclose(f); 140 return 1; 141} 142 143static int find_block_dir(dev_t dev, char *path) 144{ 145 struct dirent *dir; 146 struct stat st; 147 int found = 0; 148 DIR *D; 149 150 D = opendir(path); 151 if (!D) 152 return 0; 153 154 while ((dir = readdir(D)) != NULL) { 155 char full_path[256]; 156 157 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, "..")) 158 continue; 159 if (!strcmp(dir->d_name, "device")) 160 continue; 161 162 sprintf(full_path, "%s/%s", path, dir->d_name); 163 164 if (!strcmp(dir->d_name, "dev")) { 165 if (!check_dev_match(dev, full_path)) { 166 found = 1; 167 break; 168 } 169 } 170 171 if (stat(full_path, &st) == -1) { 172 perror("stat"); 173 break; 174 } 175 176 if (!S_ISDIR(st.st_mode) || S_ISLNK(st.st_mode)) 177 continue; 178 179 found = find_block_dir(dev, full_path); 180 if (found) { 181 strcpy(path, full_path); 182 break; 183 } 184 } 185 186 closedir(D); 187 return found; 188} 189 190void init_disk_util(struct thread_data *td) 191{ 192 struct stat st; 193 char foo[256], tmp[256]; 194 dev_t dev; 195 char *p; 196 197 if (!td->do_disk_util) 198 return; 199 200 if (!stat(td->file_name, &st)) { 201 if (S_ISBLK(st.st_mode)) 202 dev = st.st_rdev; 203 else 204 dev = st.st_dev; 205 } else { 206 /* 207 * must be a file, open "." in that path 208 */ 209 strcpy(foo, td->file_name); 210 p = dirname(foo); 211 if (stat(p, &st)) { 212 perror("disk util stat"); 213 return; 214 } 215 216 dev = st.st_dev; 217 } 218 219 if (disk_util_exists(dev)) 220 return; 221 222 sprintf(foo, "/sys/block"); 223 if (!find_block_dir(dev, foo)) 224 return; 225 226 /* 227 * If there's a ../queue/ directory there, we are inside a partition. 228 * Check if that is the case and jump back. For loop/md/dm etc we 229 * are already in the right spot. 230 */ 231 sprintf(tmp, "%s/../queue", foo); 232 if (!stat(tmp, &st)) { 233 p = dirname(foo); 234 sprintf(tmp, "%s/queue", p); 235 if (stat(tmp, &st)) { 236 log_err("unknown sysfs layout\n"); 237 return; 238 } 239 sprintf(foo, "%s", p); 240 } 241 242 td->sysfs_root = strdup(foo); 243 disk_util_add(dev, foo); 244} 245 246void disk_util_timer_arm(void) 247{ 248 itimer.it_value.tv_sec = 0; 249 itimer.it_value.tv_usec = DISK_UTIL_MSEC * 1000; 250 setitimer(ITIMER_REAL, &itimer, NULL); 251} 252 253void update_rusage_stat(struct thread_data *td) 254{ 255 if (!(td->runtime[0] + td->runtime[1])) 256 return; 257 258 getrusage(RUSAGE_SELF, &td->ru_end); 259 260 td->usr_time += mtime_since(&td->ru_start.ru_utime, &td->ru_end.ru_utime); 261 td->sys_time += mtime_since(&td->ru_start.ru_stime, &td->ru_end.ru_stime); 262 td->ctx += td->ru_end.ru_nvcsw + td->ru_end.ru_nivcsw - (td->ru_start.ru_nvcsw + td->ru_start.ru_nivcsw); 263 264 265 memcpy(&td->ru_start, &td->ru_end, sizeof(td->ru_end)); 266} 267 268static int calc_lat(struct io_stat *is, unsigned long *min, unsigned long *max, 269 double *mean, double *dev) 270{ 271 double n; 272 273 if (is->samples == 0) 274 return 0; 275 276 *min = is->min_val; 277 *max = is->max_val; 278 279 n = (double) is->samples; 280 *mean = (double) is->val / n; 281 *dev = sqrt(((double) is->val_sq - (*mean * *mean) / n) / (n - 1)); 282 283 return 1; 284} 285 286static void show_group_stats(struct group_run_stats *rs, int id) 287{ 288 fprintf(f_out, "\nRun status group %d (all jobs):\n", id); 289 290 if (rs->max_run[DDIR_READ]) 291 fprintf(f_out, " READ: io=%lluMiB, aggrb=%llu, minb=%llu, maxb=%llu, mint=%llumsec, maxt=%llumsec\n", rs->io_kb[0] >> 10, rs->agg[0], rs->min_bw[0], rs->max_bw[0], rs->min_run[0], rs->max_run[0]); 292 if (rs->max_run[DDIR_WRITE]) 293 fprintf(f_out, " WRITE: io=%lluMiB, aggrb=%llu, minb=%llu, maxb=%llu, mint=%llumsec, maxt=%llumsec\n", rs->io_kb[1] >> 10, rs->agg[1], rs->min_bw[1], rs->max_bw[1], rs->min_run[1], rs->max_run[1]); 294} 295 296static void show_disk_util(void) 297{ 298 struct disk_util_stat *dus; 299 struct list_head *entry; 300 struct disk_util *du; 301 double util; 302 303 fprintf(f_out, "\nDisk stats (read/write):\n"); 304 305 list_for_each(entry, &disk_list) { 306 du = list_entry(entry, struct disk_util, list); 307 dus = &du->dus; 308 309 util = (double) 100 * du->dus.io_ticks / (double) du->msec; 310 if (util > 100.0) 311 util = 100.0; 312 313 fprintf(f_out, " %s: ios=%u/%u, merge=%u/%u, ticks=%u/%u, in_queue=%u, util=%3.2f%%\n", du->name, dus->ios[0], dus->ios[1], dus->merges[0], dus->merges[1], dus->ticks[0], dus->ticks[1], dus->time_in_queue, util); 314 } 315} 316 317static void show_ddir_status(struct thread_data *td, struct group_run_stats *rs, 318 int ddir) 319{ 320 char *ddir_str[] = { "read ", "write" }; 321 unsigned long min, max; 322 unsigned long long bw; 323 double mean, dev; 324 325 if (!td->runtime[ddir]) 326 return; 327 328 bw = td->io_bytes[ddir] / td->runtime[ddir]; 329 fprintf(f_out, " %s: io=%6lluMiB, bw=%6lluKiB/s, runt=%6lumsec\n", ddir_str[ddir], td->io_bytes[ddir] >> 20, bw, td->runtime[ddir]); 330 331 if (calc_lat(&td->slat_stat[ddir], &min, &max, &mean, &dev)) 332 fprintf(f_out, " slat (msec): min=%5lu, max=%5lu, avg=%5.02f, dev=%5.02f\n", min, max, mean, dev); 333 334 if (calc_lat(&td->clat_stat[ddir], &min, &max, &mean, &dev)) 335 fprintf(f_out, " clat (msec): min=%5lu, max=%5lu, avg=%5.02f, dev=%5.02f\n", min, max, mean, dev); 336 337 if (calc_lat(&td->bw_stat[ddir], &min, &max, &mean, &dev)) { 338 double p_of_agg; 339 340 p_of_agg = mean * 100 / (double) rs->agg[ddir]; 341 fprintf(f_out, " bw (KiB/s) : min=%5lu, max=%5lu, per=%3.2f%%, avg=%5.02f, dev=%5.02f\n", min, max, p_of_agg, mean, dev); 342 } 343} 344 345static void show_thread_status(struct thread_data *td, 346 struct group_run_stats *rs) 347{ 348 double usr_cpu, sys_cpu; 349 350 if (!(td->io_bytes[0] + td->io_bytes[1]) && !td->error) 351 return; 352 353 fprintf(f_out, "%s: (groupid=%d): err=%2d:\n",td->name, td->groupid, td->error); 354 355 show_ddir_status(td, rs, td->ddir); 356 if (td->io_bytes[td->ddir ^ 1]) 357 show_ddir_status(td, rs, td->ddir ^ 1); 358 359 if (td->runtime[0] + td->runtime[1]) { 360 double runt = td->runtime[0] + td->runtime[1]; 361 362 usr_cpu = (double) td->usr_time * 100 / runt; 363 sys_cpu = (double) td->sys_time * 100 / runt; 364 } else { 365 usr_cpu = 0; 366 sys_cpu = 0; 367 } 368 369 fprintf(f_out, " cpu : usr=%3.2f%%, sys=%3.2f%%, ctx=%lu\n", usr_cpu, sys_cpu, td->ctx); 370} 371 372static void show_ddir_status_terse(struct thread_data *td, 373 struct group_run_stats *rs, int ddir) 374{ 375 unsigned long min, max; 376 unsigned long long bw; 377 double mean, dev; 378 379 bw = 0; 380 if (td->runtime[ddir]) 381 bw = td->io_bytes[ddir] / td->runtime[ddir]; 382 383 fprintf(f_out, ",%llu,%llu,%lu", td->io_bytes[ddir] >> 10, bw, td->runtime[ddir]); 384 385 if (calc_lat(&td->slat_stat[ddir], &min, &max, &mean, &dev)) 386 fprintf(f_out, ",%lu,%lu,%f,%f", min, max, mean, dev); 387 else 388 fprintf(f_out, ",%lu,%lu,%f,%f", 0UL, 0UL, 0.0, 0.0); 389 390 if (calc_lat(&td->clat_stat[ddir], &min, &max, &mean, &dev)) 391 fprintf(f_out, ",%lu,%lu,%f,%f", min, max, mean, dev); 392 else 393 fprintf(f_out, ",%lu,%lu,%f,%f", 0UL, 0UL, 0.0, 0.0); 394 395 if (calc_lat(&td->bw_stat[ddir], &min, &max, &mean, &dev)) { 396 double p_of_agg; 397 398 p_of_agg = mean * 100 / (double) rs->agg[ddir]; 399 fprintf(f_out, ",%lu,%lu,%f%%,%f,%f", min, max, p_of_agg, mean, dev); 400 } else 401 fprintf(f_out, ",%lu,%lu,%f%%,%f,%f", 0UL, 0UL, 0.0, 0.0, 0.0); 402 403} 404 405 406static void show_thread_status_terse(struct thread_data *td, 407 struct group_run_stats *rs) 408{ 409 double usr_cpu, sys_cpu; 410 411 fprintf(f_out, "%s,%d,%d",td->name, td->groupid, td->error); 412 413 show_ddir_status_terse(td, rs, 0); 414 show_ddir_status_terse(td, rs, 1); 415 416 if (td->runtime[0] + td->runtime[1]) { 417 double runt = td->runtime[0] + td->runtime[1]; 418 419 usr_cpu = (double) td->usr_time * 100 / runt; 420 sys_cpu = (double) td->sys_time * 100 / runt; 421 } else { 422 usr_cpu = 0; 423 sys_cpu = 0; 424 } 425 426 fprintf(f_out, ",%f%%,%f%%,%lu\n", usr_cpu, sys_cpu, td->ctx); 427} 428 429void show_run_stats(void) 430{ 431 struct group_run_stats *runstats, *rs; 432 struct thread_data *td; 433 int i; 434 435 runstats = malloc(sizeof(struct group_run_stats) * (groupid + 1)); 436 437 for (i = 0; i < groupid + 1; i++) { 438 rs = &runstats[i]; 439 440 memset(rs, 0, sizeof(*rs)); 441 rs->min_bw[0] = rs->min_run[0] = ~0UL; 442 rs->min_bw[1] = rs->min_run[1] = ~0UL; 443 } 444 445 for (i = 0; i < thread_number; i++) { 446 unsigned long long rbw, wbw; 447 448 td = &threads[i]; 449 450 if (td->error) { 451 fprintf(f_out, "%s: %s\n", td->name, td->verror); 452 continue; 453 } 454 455 rs = &runstats[td->groupid]; 456 457 if (td->runtime[0] < rs->min_run[0] || !rs->min_run[0]) 458 rs->min_run[0] = td->runtime[0]; 459 if (td->runtime[0] > rs->max_run[0]) 460 rs->max_run[0] = td->runtime[0]; 461 if (td->runtime[1] < rs->min_run[1] || !rs->min_run[1]) 462 rs->min_run[1] = td->runtime[1]; 463 if (td->runtime[1] > rs->max_run[1]) 464 rs->max_run[1] = td->runtime[1]; 465 466 rbw = wbw = 0; 467 if (td->runtime[0]) 468 rbw = td->io_bytes[0] / (unsigned long long) td->runtime[0]; 469 if (td->runtime[1]) 470 wbw = td->io_bytes[1] / (unsigned long long) td->runtime[1]; 471 472 if (rbw < rs->min_bw[0]) 473 rs->min_bw[0] = rbw; 474 if (wbw < rs->min_bw[1]) 475 rs->min_bw[1] = wbw; 476 if (rbw > rs->max_bw[0]) 477 rs->max_bw[0] = rbw; 478 if (wbw > rs->max_bw[1]) 479 rs->max_bw[1] = wbw; 480 481 rs->io_kb[0] += td->io_bytes[0] >> 10; 482 rs->io_kb[1] += td->io_bytes[1] >> 10; 483 } 484 485 for (i = 0; i < groupid + 1; i++) { 486 rs = &runstats[i]; 487 488 if (rs->max_run[0]) 489 rs->agg[0] = (rs->io_kb[0]*1024) / rs->max_run[0]; 490 if (rs->max_run[1]) 491 rs->agg[1] = (rs->io_kb[1]*1024) / rs->max_run[1]; 492 } 493 494 /* 495 * don't overwrite last signal output 496 */ 497 if (!terse_output) 498 printf("\n"); 499 500 for (i = 0; i < thread_number; i++) { 501 td = &threads[i]; 502 rs = &runstats[td->groupid]; 503 504 if (terse_output) 505 show_thread_status_terse(td, rs); 506 else 507 show_thread_status(td, rs); 508 } 509 510 if (!terse_output) { 511 for (i = 0; i < groupid + 1; i++) 512 show_group_stats(&runstats[i], i); 513 514 show_disk_util(); 515 } 516} 517 518static inline void add_stat_sample(struct io_stat *is, unsigned long val) 519{ 520 if (val > is->max_val) 521 is->max_val = val; 522 if (val < is->min_val) 523 is->min_val = val; 524 525 is->val += val; 526 is->val_sq += val * val; 527 is->samples++; 528} 529 530static void add_log_sample(struct thread_data *td, struct io_log *iolog, 531 unsigned long val, int ddir) 532{ 533 if (iolog->nr_samples == iolog->max_samples) { 534 int new_size = sizeof(struct io_sample) * iolog->max_samples*2; 535 536 iolog->log = realloc(iolog->log, new_size); 537 iolog->max_samples <<= 1; 538 } 539 540 iolog->log[iolog->nr_samples].val = val; 541 iolog->log[iolog->nr_samples].time = mtime_since_now(&td->epoch); 542 iolog->log[iolog->nr_samples].ddir = ddir; 543 iolog->nr_samples++; 544} 545 546void add_clat_sample(struct thread_data *td, int ddir, unsigned long msec) 547{ 548 add_stat_sample(&td->clat_stat[ddir], msec); 549 550 if (td->clat_log) 551 add_log_sample(td, td->clat_log, msec, ddir); 552} 553 554void add_slat_sample(struct thread_data *td, int ddir, unsigned long msec) 555{ 556 add_stat_sample(&td->slat_stat[ddir], msec); 557 558 if (td->slat_log) 559 add_log_sample(td, td->slat_log, msec, ddir); 560} 561 562void add_bw_sample(struct thread_data *td, int ddir) 563{ 564 unsigned long spent = mtime_since_now(&td->stat_sample_time[ddir]); 565 unsigned long rate; 566 567 if (spent < td->bw_avg_time) 568 return; 569 570 rate = (td->this_io_bytes[ddir] - td->stat_io_bytes[ddir]) / spent; 571 add_stat_sample(&td->bw_stat[ddir], rate); 572 573 if (td->bw_log) 574 add_log_sample(td, td->bw_log, rate, ddir); 575 576 gettimeofday(&td->stat_sample_time[ddir], NULL); 577 td->stat_io_bytes[ddir] = td->this_io_bytes[ddir]; 578} 579 580 581