iostat.c revision 1.49
1 /* $NetBSD: iostat.c,v 1.49 2006/04/14 13:14:57 blymn Exp $ */ 2 3 /* 4 * Copyright (c) 1996 John M. Vinopal 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed for the NetBSD Project 18 * by John M. Vinopal. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 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. Neither the name of the University nor the names of its contributors 48 * may be used to endorse or promote products derived from this software 49 * without specific prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 52 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 53 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 54 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 55 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 56 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 57 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 58 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 59 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 60 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 61 * SUCH DAMAGE. 62 */ 63 64 #include <sys/cdefs.h> 65 #ifndef lint 66 __COPYRIGHT("@(#) Copyright (c) 1986, 1991, 1993\n\ 67 The Regents of the University of California. All rights reserved.\n"); 68 #endif /* not lint */ 69 70 #ifndef lint 71 #if 0 72 static char sccsid[] = "@(#)iostat.c 8.3 (Berkeley) 4/28/95"; 73 #else 74 __RCSID("$NetBSD: iostat.c,v 1.49 2006/04/14 13:14:57 blymn Exp $"); 75 #endif 76 #endif /* not lint */ 77 78 #include <sys/types.h> 79 #include <sys/ioctl.h> 80 #include <sys/sched.h> 81 #include <sys/time.h> 82 83 #include <err.h> 84 #include <ctype.h> 85 #include <signal.h> 86 #include <stdio.h> 87 #include <stdlib.h> 88 #include <string.h> 89 #include <unistd.h> 90 91 #include "drvstats.h" 92 93 /* Namelist and memory files. */ 94 char *nlistf, *memf; 95 96 int hz, reps, interval; 97 static int todo = 0; 98 static int defdrives; 99 static int winlines = 20; 100 static int wincols = 80; 101 102 #define ISSET(x, a) ((x) & (a)) 103 #define SHOW_CPU 1<<0 104 #define SHOW_TTY 1<<1 105 #define SHOW_STATS_1 1<<2 106 #define SHOW_STATS_2 1<<3 107 #define SHOW_STATS_X 1<<4 108 #define SHOW_TOTALS 1<<7 109 #define SHOW_STATS_ALL (SHOW_STATS_1 | SHOW_STATS_2 | SHOW_STATS_X) 110 111 static void cpustats(void); 112 static void drive_stats(double); 113 static void drive_stats2(double); 114 static void drive_statsx(double); 115 static void sig_header(int); 116 static volatile int do_header; 117 static void header(void); 118 static void usage(void); 119 static void display(void); 120 static int selectdrives(int, char *[]); 121 122 int main(int, char *[]); 123 124 int 125 main(int argc, char *argv[]) 126 { 127 int ch, hdrcnt, ndrives, lines; 128 struct timespec tv; 129 struct ttysize ts; 130 131 while ((ch = getopt(argc, argv, "Cc:dDIM:N:Tw:x")) != -1) 132 switch (ch) { 133 case 'c': 134 if ((reps = atoi(optarg)) <= 0) 135 errx(1, "repetition count <= 0."); 136 break; 137 case 'C': 138 todo |= SHOW_CPU; 139 break; 140 case 'd': 141 todo &= ~SHOW_STATS_ALL; 142 todo |= SHOW_STATS_1; 143 break; 144 case 'D': 145 todo &= ~SHOW_STATS_ALL; 146 todo |= SHOW_STATS_2; 147 break; 148 case 'I': 149 todo |= SHOW_TOTALS; 150 break; 151 case 'M': 152 memf = optarg; 153 break; 154 case 'N': 155 nlistf = optarg; 156 break; 157 case 'T': 158 todo |= SHOW_TTY; 159 break; 160 case 'w': 161 if ((interval = atoi(optarg)) <= 0) 162 errx(1, "interval <= 0."); 163 break; 164 case 'x': 165 todo &= ~SHOW_STATS_ALL; 166 todo |= SHOW_STATS_X; 167 break; 168 case '?': 169 default: 170 usage(); 171 } 172 argc -= optind; 173 argv += optind; 174 175 if (!ISSET(todo, SHOW_CPU | SHOW_TTY | SHOW_STATS_ALL)) 176 todo |= SHOW_CPU | SHOW_TTY | SHOW_STATS_1; 177 if (ISSET(todo, SHOW_STATS_X)) { 178 todo &= ~(SHOW_CPU | SHOW_TTY | SHOW_STATS_ALL); 179 todo |= SHOW_STATS_X; 180 } 181 182 if (ioctl(STDOUT_FILENO, TIOCGSIZE, &ts) != -1) { 183 if (ts.ts_lines) 184 winlines = ts.ts_lines; 185 if (ts.ts_cols) 186 wincols = ts.ts_cols; 187 } 188 189 defdrives = wincols; 190 if (ISSET(todo, SHOW_CPU)) 191 defdrives -= 16; /* XXX magic number */ 192 if (ISSET(todo, SHOW_TTY)) 193 defdrives -= 9; /* XXX magic number */ 194 defdrives /= 18; /* XXX magic number */ 195 196 drvinit(0); 197 cpureadstats(); 198 drvreadstats(); 199 ndrives = selectdrives(argc, argv); 200 if (ndrives == 0) { 201 /* No drives are selected. No need to show drive stats. */ 202 todo &= ~SHOW_STATS_ALL; 203 if (todo == 0) 204 errx(1, "no drives"); 205 } 206 if (ISSET(todo, SHOW_STATS_X)) 207 lines = ndrives; 208 else 209 lines = 1; 210 211 tv.tv_sec = interval; 212 tv.tv_nsec = 0; 213 214 /* print a new header on sigcont */ 215 (void)signal(SIGCONT, sig_header); 216 217 for (hdrcnt = 1;;) { 218 if (do_header || lines > 1 || (hdrcnt -= lines) <= 0) { 219 do_header = 0; 220 header(); 221 hdrcnt = winlines - 4; 222 } 223 224 if (!ISSET(todo, SHOW_TOTALS)) { 225 cpuswap(); 226 drvswap(); 227 } 228 229 display(); 230 231 if (reps >= 0 && --reps <= 0) 232 break; 233 nanosleep(&tv, NULL); 234 cpureadstats(); 235 drvreadstats(); 236 } 237 exit(0); 238 } 239 240 static void 241 sig_header(int signo) 242 { 243 do_header = 1; 244 } 245 246 static void 247 header() 248 { 249 int i; 250 251 /* Main Headers. */ 252 if (ISSET(todo, SHOW_STATS_X)) { 253 if (ISSET(todo, SHOW_TOTALS)) { 254 (void)printf( 255 "device read KB/t xfr time MB "); 256 (void)printf(" write KB/t xfr time MB\n"); 257 } else { 258 (void)printf( 259 "device read KB/t r/s time MB/s"); 260 (void)printf(" write KB/t w/s time MB/s\n"); 261 } 262 return; 263 } 264 265 if (ISSET(todo, SHOW_TTY)) 266 (void)printf(" tty"); 267 268 if (ISSET(todo, SHOW_STATS_1)) { 269 for (i = 0; i < ndrive; i++) 270 if (cur.select[i]) 271 (void)printf(" %9.9s ", cur.name[i]); 272 } 273 274 if (ISSET(todo, SHOW_STATS_2)) { 275 for (i = 0; i < ndrive; i++) 276 if (cur.select[i]) 277 (void)printf(" %9.9s ", cur.name[i]); 278 } 279 280 if (ISSET(todo, SHOW_CPU)) 281 (void)printf(" CPU"); 282 283 printf("\n"); 284 285 /* Sub-Headers. */ 286 if (ISSET(todo, SHOW_TTY)) 287 printf(" tin tout"); 288 289 if (ISSET(todo, SHOW_STATS_1)) { 290 for (i = 0; i < ndrive; i++) 291 if (cur.select[i]) { 292 if (ISSET(todo, SHOW_TOTALS)) 293 (void)printf(" KB/t xfr MB "); 294 else 295 (void)printf(" KB/t t/s MB/s "); 296 } 297 } 298 299 if (ISSET(todo, SHOW_STATS_2)) { 300 for (i = 0; i < ndrive; i++) 301 if (cur.select[i]) 302 (void)printf(" KB xfr time "); 303 } 304 305 if (ISSET(todo, SHOW_CPU)) 306 (void)printf(" us ni sy in id"); 307 printf("\n"); 308 } 309 310 static void 311 drive_stats(double etime) 312 { 313 int dn; 314 double atime, mbps; 315 316 for (dn = 0; dn < ndrive; ++dn) { 317 if (!cur.select[dn]) 318 continue; 319 /* average Kbytes per transfer. */ 320 if (cur.rxfer[dn] + cur.wxfer[dn]) 321 mbps = ((cur.rbytes[dn] + cur.wbytes[dn]) / 322 1024.0) / (cur.rxfer[dn] + cur.wxfer[dn]); 323 else 324 mbps = 0.0; 325 (void)printf(" %5.2f", mbps); 326 327 /* average transfers per second. */ 328 (void)printf(" %4.0f", 329 (cur.rxfer[dn] + cur.wxfer[dn]) / etime); 330 331 /* time busy in drive activity */ 332 atime = (double)cur.time[dn].tv_sec + 333 ((double)cur.time[dn].tv_usec / (double)1000000); 334 335 /* Megabytes per second. */ 336 if (atime != 0.0) 337 mbps = (cur.rbytes[dn] + cur.wbytes[dn]) / 338 (double)(1024 * 1024); 339 else 340 mbps = 0; 341 (void)printf(" %5.2f ", mbps / etime); 342 } 343 } 344 345 static void 346 drive_stats2(double etime) 347 { 348 int dn; 349 double atime; 350 351 for (dn = 0; dn < ndrive; ++dn) { 352 if (!cur.select[dn]) 353 continue; 354 355 /* average kbytes per second. */ 356 (void)printf(" %5.0f", 357 (cur.rbytes[dn] + cur.wbytes[dn]) / 1024.0 / etime); 358 359 /* average transfers per second. */ 360 (void)printf(" %5.0f", 361 (cur.rxfer[dn] + cur.wxfer[dn]) / etime); 362 363 /* average time busy in drive activity */ 364 atime = (double)cur.time[dn].tv_sec + 365 ((double)cur.time[dn].tv_usec / (double)1000000); 366 (void)printf(" %4.2f ", atime / etime); 367 } 368 } 369 370 static void 371 drive_statsx(double etime) 372 { 373 int dn; 374 double atime, kbps; 375 376 for (dn = 0; dn < ndrive; ++dn) { 377 if (!cur.select[dn]) 378 continue; 379 380 (void)printf("%-8.8s", cur.name[dn]); 381 382 /* average read Kbytes per transfer */ 383 if (cur.rxfer[dn]) 384 kbps = (cur.rbytes[dn] / 1024.0) / cur.rxfer[dn]; 385 else 386 kbps = 0.0; 387 (void)printf(" %8.2f", kbps); 388 389 /* average read transfers 390 (per second) */ 391 (void)printf(" %6.0f", cur.rxfer[dn] / etime); 392 393 /* time read busy in drive activity */ 394 atime = (double)cur.time[dn].tv_sec + 395 ((double)cur.time[dn].tv_usec / (double)1000000); 396 (void)printf(" %6.2f", atime / etime); 397 398 /* average read megabytes 399 (per second) */ 400 (void)printf(" %8.2f", 401 cur.rbytes[dn] / (1024.0 * 1024) / etime); 402 403 404 /* average write Kbytes per transfer */ 405 if (cur.wxfer[dn]) 406 kbps = (cur.wbytes[dn] / 1024.0) / cur.wxfer[dn]; 407 else 408 kbps = 0.0; 409 (void)printf(" %8.2f", kbps); 410 411 /* average write transfers 412 (per second) */ 413 (void)printf(" %6.0f", cur.wxfer[dn] / etime); 414 415 /* time write busy in drive activity */ 416 atime = (double)cur.time[dn].tv_sec + 417 ((double)cur.time[dn].tv_usec / (double)1000000); 418 (void)printf(" %6.2f", atime / etime); 419 420 /* average write megabytes 421 (per second) */ 422 (void)printf(" %8.2f\n", 423 cur.wbytes[dn] / (1024.0 * 1024) / etime); 424 } 425 } 426 427 static void 428 cpustats(void) 429 { 430 int state; 431 double time; 432 433 time = 0; 434 for (state = 0; state < CPUSTATES; ++state) 435 time += cur.cp_time[state]; 436 if (!time) 437 time = 1.0; 438 /* States are generally never 100% and can use %3.0f. */ 439 for (state = 0; state < CPUSTATES; ++state) 440 printf(" %2.0f", 100. * cur.cp_time[state] / time); 441 } 442 443 static void 444 usage(void) 445 { 446 447 (void)fprintf(stderr, "usage: iostat [-CdDITx] [-c count] [-M core] " 448 "[-N system] [-w wait] [drives]\n"); 449 exit(1); 450 } 451 452 static void 453 display(void) 454 { 455 double etime; 456 457 /* Sum up the elapsed ticks. */ 458 etime = cur.cp_etime; 459 460 /* 461 * If we're showing totals only, then don't divide by the 462 * system time. 463 */ 464 if (ISSET(todo, SHOW_TOTALS)) 465 etime = 1.0; 466 467 if (ISSET(todo, SHOW_STATS_X)) { 468 drive_statsx(etime); 469 goto out; 470 } 471 472 if (ISSET(todo, SHOW_TTY)) 473 printf("%4.0f %4.0f", cur.tk_nin / etime, cur.tk_nout / etime); 474 475 if (ISSET(todo, SHOW_STATS_1)) { 476 drive_stats(etime); 477 } 478 479 480 if (ISSET(todo, SHOW_STATS_2)) { 481 drive_stats2(etime); 482 } 483 484 485 if (ISSET(todo, SHOW_CPU)) 486 cpustats(); 487 488 (void)printf("\n"); 489 490 out: 491 (void)fflush(stdout); 492 } 493 494 static int 495 selectdrives(int argc, char *argv[]) 496 { 497 int i, maxdrives, ndrives, tried; 498 499 /* 500 * Choose drives to be displayed. Priority goes to (in order) drives 501 * supplied as arguments and default drives. If everything isn't 502 * filled in and there are drives not taken care of, display the first 503 * few that fit. 504 * 505 * The backward compatibility #ifdefs permit the syntax: 506 * iostat [ drives ] [ interval [ count ] ] 507 */ 508 509 #define BACKWARD_COMPATIBILITY 510 for (tried = ndrives = 0; *argv; ++argv) { 511 #ifdef BACKWARD_COMPATIBILITY 512 if (isdigit((unsigned char)**argv)) 513 break; 514 #endif 515 tried++; 516 for (i = 0; i < ndrive; i++) { 517 if (strcmp(cur.name[i], *argv)) 518 continue; 519 cur.select[i] = 1; 520 ++ndrives; 521 } 522 523 } 524 525 if (ndrives == 0 && tried == 0) { 526 /* 527 * Pick up to defdrives (or all if -x is given) drives 528 * if none specified. 529 */ 530 maxdrives = (ISSET(todo, SHOW_STATS_X) || 531 ndrive < defdrives) 532 ? (ndrive) : defdrives; 533 for (i = 0; i < maxdrives; i++) { 534 cur.select[i] = 1; 535 536 ++ndrives; 537 if (!ISSET(todo, SHOW_STATS_X) && ndrives == defdrives) 538 break; 539 } 540 } 541 542 #ifdef BACKWARD_COMPATIBILITY 543 if (*argv) { 544 interval = atoi(*argv); 545 if (*++argv) 546 reps = atoi(*argv); 547 } 548 #endif 549 550 if (interval) { 551 if (!reps) 552 reps = -1; 553 } else 554 if (reps) 555 interval = 1; 556 557 return (ndrives); 558 } 559
Indexes created Tue Sep 23 14:10:03 GMT 2025