1 /* 2 * Copyright (c) 1997, 1998 Kenneth D. Merry. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD: src/usr.sbin/iostat/iostat.c,v 1.17.2.2 2001/07/19 04:15:42 kris Exp $ 29 * $DragonFly: src/usr.sbin/iostat/iostat.c,v 1.5 2004/12/22 11:01:49 joerg Exp $ 30 */ 31 /* 32 * Parts of this program are derived from the original FreeBSD iostat 33 * program: 34 */ 35 /*- 36 * Copyright (c) 1986, 1991, 1993 37 * The Regents of the University of California. All rights reserved. 38 * 39 * Redistribution and use in source and binary forms, with or without 40 * modification, are permitted provided that the following conditions 41 * are met: 42 * 1. Redistributions of source code must retain the above copyright 43 * notice, this list of conditions and the following disclaimer. 44 * 2. Redistributions in binary form must reproduce the above copyright 45 * notice, this list of conditions and the following disclaimer in the 46 * documentation and/or other materials provided with the distribution. 47 * 3. All advertising materials mentioning features or use of this software 48 * must display the following acknowledgement: 49 * This product includes software developed by the University of 50 * California, Berkeley and its contributors. 51 * 4. Neither the name of the University nor the names of its contributors 52 * may be used to endorse or promote products derived from this software 53 * without specific prior written permission. 54 * 55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 65 * SUCH DAMAGE. 66 */ 67 /* 68 * Ideas for the new iostat statistics output modes taken from the NetBSD 69 * version of iostat: 70 */ 71 /* 72 * Copyright (c) 1996 John M. Vinopal 73 * All rights reserved. 74 * 75 * Redistribution and use in source and binary forms, with or without 76 * modification, are permitted provided that the following conditions 77 * are met: 78 * 1. Redistributions of source code must retain the above copyright 79 * notice, this list of conditions and the following disclaimer. 80 * 2. Redistributions in binary form must reproduce the above copyright 81 * notice, this list of conditions and the following disclaimer in the 82 * documentation and/or other materials provided with the distribution. 83 * 3. All advertising materials mentioning features or use of this software 84 * must display the following acknowledgement: 85 * This product includes software developed for the NetBSD Project 86 * by John M. Vinopal. 87 * 4. The name of the author may not be used to endorse or promote products 88 * derived from this software without specific prior written permission. 89 * 90 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 91 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 92 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 93 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 94 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 95 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 96 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 97 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 98 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 99 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 100 * SUCH DAMAGE. 101 */ 102 103 #include <sys/param.h> 104 #include <sys/errno.h> 105 106 #include <err.h> 107 #include <ctype.h> 108 #include <fcntl.h> 109 #include <kinfo.h> 110 #include <stdio.h> 111 #include <stdlib.h> 112 #include <string.h> 113 #include <unistd.h> 114 #include <limits.h> 115 #include <devstat.h> 116 117 struct statinfo cur, last; 118 uint64_t tk_nin, old_tk_nin, diff_tk_nin; 119 uint64_t tk_nout, old_tk_nout, diff_tk_nout; 120 struct kinfo_cputime cp_time, old_cp_time, diff_cp_time; 121 double cp_time_total; 122 int num_devices; 123 struct device_selection *dev_select; 124 int maxshowdevs; 125 int dflag = 0, Iflag = 0, Cflag = 0, Tflag = 0, oflag = 0, Kflag = 0; 126 127 /* local function declarations */ 128 static void usage(void); 129 static void phdr(int signo); 130 static void devstats(int perf_select); 131 static void cpustats(void); 132 133 static void 134 usage(void) 135 { 136 /* 137 * We also support the following 'traditional' syntax: 138 * iostat [drives] [wait [count]] 139 * This isn't mentioned in the man page, or the usage statement, 140 * but it is supported. 141 */ 142 fprintf(stderr, "usage: iostat [-CdhIKoT?] [-c count]" 143 " [-n devs]\n" 144 "\t [-t type,if,pass] [-w wait] [drives]\n"); 145 } 146 147 int 148 main(int argc, char **argv) 149 { 150 int c; 151 int i; 152 int tflag = 0, hflag = 0, cflag = 0, wflag = 0, nflag = 0; 153 int count = 0, waittime = 0; 154 struct devstat_match *matches; 155 int num_matches = 0; 156 char errbuf[_POSIX2_LINE_MAX]; 157 int hz, stathz; 158 int headercount; 159 long generation; 160 int num_devices_specified; 161 int num_selected, num_selections; 162 long select_generation; 163 char **specified_devices; 164 devstat_select_mode select_mode; 165 166 matches = NULL; 167 maxshowdevs = 3; 168 169 while ((c = getopt(argc, argv, "c:CdhIKM:n:N:ot:Tw:?")) != -1) { 170 switch(c) { 171 case 'c': 172 cflag++; 173 count = atoi(optarg); 174 if (count < 1) 175 errx(1, "count %d is < 1", count); 176 break; 177 case 'C': 178 Cflag++; 179 break; 180 case 'd': 181 dflag++; 182 break; 183 case 'h': 184 hflag++; 185 break; 186 case 'I': 187 Iflag++; 188 break; 189 case 'K': 190 Kflag++; 191 break; 192 case 'n': 193 nflag++; 194 maxshowdevs = atoi(optarg); 195 if (maxshowdevs < 0) 196 errx(1, "number of devices %d is < 0", 197 maxshowdevs); 198 break; 199 case 'o': 200 oflag++; 201 break; 202 case 't': 203 tflag++; 204 if (buildmatch(optarg, &matches, 205 &num_matches) != 0) 206 errx(1, "%s", devstat_errbuf); 207 break; 208 case 'T': 209 Tflag++; 210 break; 211 case 'w': 212 wflag++; 213 waittime = atoi(optarg); 214 if (waittime < 1) 215 errx(1, "wait time is < 1"); 216 break; 217 default: 218 usage(); 219 exit(1); 220 break; 221 } 222 } 223 224 argc -= optind; 225 argv += optind; 226 227 /* 228 * Make sure that the userland devstat version matches the kernel 229 * devstat version. If not, exit and print a message informing 230 * the user of his mistake. 231 */ 232 if (checkversion() < 0) 233 errx(1, "%s", devstat_errbuf); 234 235 /* 236 * Figure out how many devices we should display. 237 */ 238 if (nflag == 0) { 239 if (oflag > 0) { 240 if ((dflag > 0) && (Cflag == 0) && (Tflag == 0)) 241 maxshowdevs = 5; 242 else if ((dflag > 0) && (Tflag > 0) && (Cflag == 0)) 243 maxshowdevs = 5; 244 else 245 maxshowdevs = 4; 246 } else { 247 if ((dflag > 0) && (Cflag == 0)) 248 maxshowdevs = 4; 249 else 250 maxshowdevs = 3; 251 } 252 } 253 254 /* find out how many devices we have */ 255 if ((num_devices = getnumdevs()) < 0) 256 err(1, "can't get number of devices"); 257 258 if ((cur.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo))) == 259 NULL) 260 err(1, "devinfo malloc failed"); 261 if ((last.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo))) == 262 NULL) 263 err(1, "devinfo malloc failed"); 264 bzero(cur.dinfo, sizeof(struct devinfo)); 265 bzero(last.dinfo, sizeof(struct devinfo)); 266 267 /* 268 * Grab all the devices. We don't look to see if the list has 269 * changed here, since it almost certainly has. We only look for 270 * errors. 271 */ 272 if (getdevs(&cur) == -1) 273 errx(1, "%s", devstat_errbuf); 274 275 num_devices = cur.dinfo->numdevs; 276 generation = cur.dinfo->generation; 277 278 /* 279 * If the user specified any devices on the command line, see if 280 * they are in the list of devices we have now. 281 */ 282 if ((specified_devices = (char **)malloc(sizeof(char *))) == NULL) 283 err(1, "specified_devices malloc failed"); 284 for (num_devices_specified = 0; *argv; ++argv) { 285 if (isdigit(**argv)) 286 break; 287 num_devices_specified++; 288 specified_devices = (char **)realloc(specified_devices, 289 sizeof(char *) * 290 num_devices_specified); 291 specified_devices[num_devices_specified - 1] = *argv; 292 293 } 294 if (nflag == 0 && maxshowdevs < num_devices_specified) 295 maxshowdevs = num_devices_specified; 296 297 dev_select = NULL; 298 299 if ((num_devices_specified == 0) && (num_matches == 0)) 300 select_mode = DS_SELECT_ADD; 301 else 302 select_mode = DS_SELECT_ONLY; 303 304 /* 305 * At this point, selectdevs will almost surely indicate that the 306 * device list has changed, so we don't look for return values of 0 307 * or 1. If we get back -1, though, there is an error. 308 */ 309 if (selectdevs(&dev_select, &num_selected, 310 &num_selections, &select_generation, 311 generation, cur.dinfo->devices, num_devices, 312 matches, num_matches, 313 specified_devices, num_devices_specified, 314 select_mode, maxshowdevs, hflag) == -1) 315 errx(1, "%s", devstat_errbuf); 316 317 /* 318 * Look for the traditional wait time and count arguments. 319 */ 320 if (*argv) { 321 waittime = atoi(*argv); 322 323 /* Let the user know he goofed, but keep going anyway */ 324 if (wflag != 0) 325 warnx("discarding previous wait interval, using" 326 " %d instead", waittime); 327 wflag++; 328 329 if (*++argv) { 330 count = atoi(*argv); 331 if (cflag != 0) 332 warnx("discarding previous count, using %d" 333 " instead", count); 334 cflag++; 335 } else 336 count = -1; 337 } 338 339 /* 340 * If the user specified a count, but not an interval, we default 341 * to an interval of 1 second. 342 */ 343 if ((wflag == 0) && (cflag > 0)) 344 waittime = 1; 345 346 /* 347 * If the user specified a wait time, but not a count, we want to 348 * go on ad infinitum. This can be redundant if the user uses the 349 * traditional method of specifying the wait, since in that case we 350 * already set count = -1 above. Oh well. 351 */ 352 if ((wflag > 0) && (cflag == 0)) 353 count = -1; 354 355 if (kinfo_get_sched_hz(&hz)) 356 err(1, "kinfo_get_sched_hz"); 357 if (kinfo_get_sched_stathz(&hz)) 358 err(1, "kinfo_get_sched_stathz"); 359 360 /* 361 * If the user stops the program (control-Z) and then resumes it, 362 * print out the header again. 363 */ 364 signal(SIGCONT, phdr); 365 366 for (headercount = 1;;) { 367 struct devinfo *tmp_dinfo; 368 long tmp; 369 370 if (!--headercount) { 371 phdr(0); 372 headercount = 20; 373 } 374 if (kinfo_get_tty_tk_nin(&tk_nin)) 375 err(1, "kinfo_get_tty_tk_nin"); 376 if (kinfo_get_tty_tk_nout(&tk_nout)) 377 err(1, "kinfo_get_tty_tk_nout"); 378 if (kinfo_get_sched_cputime(&cp_time)) 379 err(1, "kinfo_get_sched_cputime"); 380 381 tmp_dinfo = last.dinfo; 382 last.dinfo = cur.dinfo; 383 cur.dinfo = tmp_dinfo; 384 385 last.busy_time = cur.busy_time; 386 387 /* 388 * Here what we want to do is refresh our device stats. 389 * getdevs() returns 1 when the device list has changed. 390 * If the device list has changed, we want to go through 391 * the selection process again, in case a device that we 392 * were previously displaying has gone away. 393 */ 394 switch (getdevs(&cur)) { 395 case -1: 396 errx(1, "%s", devstat_errbuf); 397 break; 398 case 1: { 399 int retval; 400 401 num_devices = cur.dinfo->numdevs; 402 generation = cur.dinfo->generation; 403 retval = selectdevs(&dev_select, &num_selected, 404 &num_selections, &select_generation, 405 generation, cur.dinfo->devices, 406 num_devices, matches, num_matches, 407 specified_devices, 408 num_devices_specified, 409 select_mode, maxshowdevs, hflag); 410 switch(retval) { 411 case -1: 412 errx(1, "%s", devstat_errbuf); 413 break; 414 case 1: 415 phdr(0); 416 headercount = 20; 417 break; 418 default: 419 break; 420 } 421 break; 422 } 423 default: 424 break; 425 } 426 427 /* 428 * We only want to re-select devices if we're in 'top' 429 * mode. This is the only mode where the devices selected 430 * could actually change. 431 */ 432 if (hflag > 0) { 433 int retval; 434 retval = selectdevs(&dev_select, &num_selected, 435 &num_selections, &select_generation, 436 generation, cur.dinfo->devices, 437 num_devices, matches, num_matches, 438 specified_devices, 439 num_devices_specified, 440 select_mode, maxshowdevs, hflag); 441 switch(retval) { 442 case -1: 443 errx(1,"%s", devstat_errbuf); 444 break; 445 case 1: 446 phdr(0); 447 headercount = 20; 448 break; 449 default: 450 break; 451 } 452 } 453 454 diff_tk_nin = tk_nin - old_tk_nin; 455 old_tk_nin = tk_nin; 456 diff_tk_nout = tk_nout - old_tk_nout; 457 old_tk_nout = tk_nout; 458 459 diff_cp_time.cp_user = cp_time.cp_user - old_cp_time.cp_user; 460 diff_cp_time.cp_nice = cp_time.cp_nice - old_cp_time.cp_nice; 461 diff_cp_time.cp_sys = cp_time.cp_sys - old_cp_time.cp_sys; 462 diff_cp_time.cp_intr = cp_time.cp_intr - old_cp_time.cp_intr; 463 diff_cp_time.cp_idle = cp_time.cp_idle - old_cp_time.cp_idle; 464 cp_time_total = diff_cp_time.cp_user + diff_cp_time.cp_nice + 465 diff_cp_time.cp_sys + diff_cp_time.cp_intr + 466 diff_cp_time.cp_idle; 467 old_cp_time = cp_time; 468 469 if (cp_time_total == 0.0) 470 cp_time_total = 1.0; 471 472 if ((dflag == 0) || (Tflag > 0)) 473 printf("%4.0f%5.0f", diff_tk_nin / cp_time_total * 1e6, 474 diff_tk_nout / cp_time_total * 1e6); 475 devstats(hflag); 476 if ((dflag == 0) || (Cflag > 0)) 477 cpustats(); 478 printf("\n"); 479 fflush(stdout); 480 481 if (count >= 0 && --count <= 0) 482 break; 483 484 sleep(waittime); 485 } 486 487 exit(0); 488 } 489 490 static void 491 phdr(int signo) 492 { 493 int i; 494 int printed; 495 496 if ((dflag == 0) || (Tflag > 0)) 497 printf(" tty"); 498 for (i = 0, printed=0;(i < num_devices) && (printed < maxshowdevs);i++){ 499 int di; 500 if ((dev_select[i].selected != 0) 501 && (dev_select[i].selected <= maxshowdevs)) { 502 di = dev_select[i].position; 503 if (oflag > 0) 504 printf("%12.6s%d ", 505 cur.dinfo->devices[di].device_name, 506 cur.dinfo->devices[di].unit_number); 507 else 508 printf("%15.6s%d ", 509 cur.dinfo->devices[di].device_name, 510 cur.dinfo->devices[di].unit_number); 511 printed++; 512 } 513 } 514 if ((dflag == 0) || (Cflag > 0)) 515 printf(" cpu\n"); 516 else 517 printf("\n"); 518 519 if ((dflag == 0) || (Tflag > 0)) 520 printf(" tin tout"); 521 522 for (i=0, printed = 0;(i < num_devices) && (printed < maxshowdevs);i++){ 523 if ((dev_select[i].selected != 0) 524 && (dev_select[i].selected <= maxshowdevs)) { 525 if (oflag > 0) { 526 if (Iflag == 0) 527 printf(" sps tps msps "); 528 else 529 printf(" blk xfr msps "); 530 } else { 531 if (Iflag == 0) 532 printf(" KB/t tps MB/s "); 533 else 534 printf(" KB/t xfrs MB "); 535 } 536 printed++; 537 } 538 } 539 if ((dflag == 0) || (Cflag > 0)) 540 printf(" us ni sy in id\n"); 541 else 542 printf("\n"); 543 544 } 545 546 static void 547 devstats(int perf_select) 548 { 549 int dn; 550 long double transfers_per_second; 551 long double kb_per_transfer, mb_per_second; 552 u_int64_t total_bytes, total_transfers, total_blocks; 553 long double busy_seconds; 554 long double total_mb; 555 long double blocks_per_second, ms_per_transaction; 556 557 /* 558 * Calculate elapsed time up front, since it's the same for all 559 * devices. 560 */ 561 busy_seconds = compute_etime(cur.busy_time, last.busy_time); 562 563 for (dn = 0; dn < num_devices; dn++) { 564 int di; 565 566 if (((perf_select == 0) && (dev_select[dn].selected == 0)) 567 || (dev_select[dn].selected > maxshowdevs)) 568 continue; 569 570 di = dev_select[dn].position; 571 572 if (compute_stats(&cur.dinfo->devices[di], 573 &last.dinfo->devices[di], busy_seconds, 574 &total_bytes, &total_transfers, 575 &total_blocks, &kb_per_transfer, 576 &transfers_per_second, &mb_per_second, 577 &blocks_per_second, &ms_per_transaction)!= 0) 578 errx(1, "%s", devstat_errbuf); 579 580 if (perf_select != 0) { 581 dev_select[dn].bytes = total_bytes; 582 if ((dev_select[dn].selected == 0) 583 || (dev_select[dn].selected > maxshowdevs)) 584 continue; 585 } 586 587 if (Kflag) { 588 int block_size = cur.dinfo->devices[di].block_size; 589 total_blocks = total_blocks * (block_size ? 590 block_size : 512) / 1024; 591 } 592 593 if (oflag > 0) { 594 int msdig = (ms_per_transaction < 100.0) ? 1 : 0; 595 596 if (Iflag == 0) 597 printf("%4.0Lf%4.0Lf%5.*Lf ", 598 blocks_per_second, 599 transfers_per_second, 600 msdig, 601 ms_per_transaction); 602 else 603 printf("%4.1qu%4.1qu%5.*Lf ", 604 total_blocks, 605 total_transfers, 606 msdig, 607 ms_per_transaction); 608 } else { 609 if (Iflag == 0) 610 printf(" %5.2Lf %3.0Lf %5.2Lf ", 611 kb_per_transfer, 612 transfers_per_second, 613 mb_per_second); 614 else { 615 total_mb = total_bytes; 616 total_mb /= 1024 * 1024; 617 618 printf(" %5.2Lf %3.1qu %5.2Lf ", 619 kb_per_transfer, 620 total_transfers, 621 total_mb); 622 } 623 } 624 } 625 } 626 627 static void 628 cpustats(void) 629 { 630 int state; 631 632 if (cp_time_total == 0.0) 633 cp_time_total = 1.0; 634 635 printf(" %2.0f", 100. * diff_cp_time.cp_user / cp_time_total); 636 printf(" %2.0f", 100. * diff_cp_time.cp_nice / cp_time_total); 637 printf(" %2.0f", 100. * diff_cp_time.cp_sys / cp_time_total); 638 printf(" %2.0f", 100. * diff_cp_time.cp_intr / cp_time_total); 639 printf(" %2.0f", 100. * diff_cp_time.cp_idle / cp_time_total); 640 } 641