iostat.c revision 1.40
1 /* $NetBSD: iostat.c,v 1.40 2003/08/07 11:25:22 agc 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 1.40 2003/08/07 11:25:22 agc 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 "dkstats.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 disk_stats(double); 113 static void disk_stats2(double); 114 static void disk_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 dkinit(0); 197 dkreadstats(); 198 ndrives = selectdrives(argc, argv); 199 if (ndrives == 0) { 200 /* No drives are selected. No need to show disk stats. */ 201 todo &= ~SHOW_STATS_ALL; 202 if (todo == 0) 203 errx(1, "no drives"); 204 } 205 if (ISSET(todo, SHOW_STATS_X)) 206 lines = ndrives; 207 else 208 lines = 1; 209 210 tv.tv_sec = interval; 211 tv.tv_nsec = 0; 212 213 /* print a new header on sigcont */ 214 (void)signal(SIGCONT, sig_header); 215 216 for (hdrcnt = 1;;) { 217 if (do_header || ((hdrcnt -= lines) <= 0)) { 218 do_header = 0; 219 header(); 220 if ((hdrcnt -= lines) <= 0) 221 hdrcnt = winlines - 4; 222 } 223 224 if (!ISSET(todo, SHOW_TOTALS)) 225 dkswap(); 226 display(); 227 228 if (reps >= 0 && --reps <= 0) 229 break; 230 nanosleep(&tv, NULL); 231 dkreadstats(); 232 } 233 exit(0); 234 } 235 236 static void 237 sig_header(int signo) 238 { 239 do_header = 1; 240 } 241 242 static void 243 header() 244 { 245 int i; 246 247 /* Main Headers. */ 248 if (ISSET(todo, SHOW_STATS_X)) { 249 if (ISSET(todo, SHOW_TOTALS)) { 250 (void)printf( 251 "device read KB/t xfr time MB/s"); 252 (void)printf(" write KB/t xfr time MB/s\n"); 253 } else { 254 (void)printf( 255 "device read KB/t r/s time MB/s"); 256 (void)printf(" write KB/t w/s time MB/s\n"); 257 } 258 return; 259 } 260 261 if (ISSET(todo, SHOW_TTY)) 262 (void)printf(" tty"); 263 264 if (ISSET(todo, SHOW_STATS_1)) 265 for (i = 0; i < dk_ndrive; i++) 266 if (cur.dk_select[i]) 267 (void)printf(" %9.9s ", cur.dk_name[i]); 268 269 if (ISSET(todo, SHOW_STATS_2)) 270 for (i = 0; i < dk_ndrive; i++) 271 if (cur.dk_select[i]) 272 (void)printf(" %9.9s ", cur.dk_name[i]); 273 274 if (ISSET(todo, SHOW_CPU)) 275 (void)printf(" cpu"); 276 277 printf("\n"); 278 279 /* Sub-Headers. */ 280 if (ISSET(todo, SHOW_TTY)) 281 printf(" tin tout"); 282 283 if (ISSET(todo, SHOW_STATS_1)) { 284 for (i = 0; i < dk_ndrive; i++) 285 if (cur.dk_select[i]) { 286 if (ISSET(todo, SHOW_TOTALS)) 287 (void)printf(" KB/t xfr MB "); 288 else 289 (void)printf(" KB/t t/s MB/s "); 290 } 291 } 292 293 if (ISSET(todo, SHOW_STATS_2)) 294 for (i = 0; i < dk_ndrive; i++) 295 if (cur.dk_select[i]) 296 (void)printf(" KB xfr time "); 297 298 if (ISSET(todo, SHOW_CPU)) 299 (void)printf(" us ni sy in id"); 300 printf("\n"); 301 } 302 303 static void 304 disk_stats(double etime) 305 { 306 int dn; 307 double atime, mbps; 308 309 for (dn = 0; dn < dk_ndrive; ++dn) { 310 if (!cur.dk_select[dn]) 311 continue; 312 /* average Kbytes per transfer. */ 313 if (cur.dk_rxfer[dn] + cur.dk_wxfer[dn]) 314 mbps = ((cur.dk_rbytes[dn] + cur.dk_wbytes[dn]) / 315 1024.0) / (cur.dk_rxfer[dn] + cur.dk_wxfer[dn]); 316 else 317 mbps = 0.0; 318 (void)printf(" %5.2f", mbps); 319 320 /* average transfers per second. */ 321 (void)printf(" %4.0f", 322 (cur.dk_rxfer[dn] + cur.dk_wxfer[dn]) / etime); 323 324 /* time busy in disk activity */ 325 atime = (double)cur.dk_time[dn].tv_sec + 326 ((double)cur.dk_time[dn].tv_usec / (double)1000000); 327 328 /* Megabytes per second. */ 329 if (atime != 0.0) 330 mbps = (cur.dk_rbytes[dn] + cur.dk_wbytes[dn]) / 331 (double)(1024 * 1024); 332 else 333 mbps = 0; 334 (void)printf(" %5.2f ", mbps / etime); 335 } 336 } 337 338 static void 339 disk_stats2(double etime) 340 { 341 int dn; 342 double atime; 343 344 for (dn = 0; dn < dk_ndrive; ++dn) { 345 if (!cur.dk_select[dn]) 346 continue; 347 348 /* average kbytes per second. */ 349 (void)printf(" %5.0f", 350 (cur.dk_rbytes[dn] + cur.dk_wbytes[dn]) / 1024.0 / etime); 351 352 /* average transfers per second. */ 353 (void)printf(" %5.0f", 354 (cur.dk_rxfer[dn] + cur.dk_wxfer[dn]) / etime); 355 356 /* average time busy in disk activity */ 357 atime = (double)cur.dk_time[dn].tv_sec + 358 ((double)cur.dk_time[dn].tv_usec / (double)1000000); 359 (void)printf(" %4.2f ", atime / etime); 360 } 361 } 362 363 static void 364 disk_statsx(double etime) 365 { 366 int dn; 367 double atime, kbps; 368 369 for (dn = 0; dn < dk_ndrive; ++dn) { 370 if (!cur.dk_select[dn]) 371 continue; 372 373 (void)printf("%-8.8s", cur.dk_name[dn]); 374 375 /* average read Kbytes per transfer */ 376 if (cur.dk_rxfer[dn]) 377 kbps = (cur.dk_rbytes[dn] / 1024.0) / cur.dk_rxfer[dn]; 378 else 379 kbps = 0.0; 380 (void)printf(" %8.2f", kbps); 381 382 /* average read transfers 383 (per second) */ 384 (void)printf(" %6.0f", cur.dk_rxfer[dn] / etime); 385 386 /* time read busy in disk activity */ 387 atime = (double)cur.dk_time[dn].tv_sec + 388 ((double)cur.dk_time[dn].tv_usec / (double)1000000); 389 (void)printf(" %6.2f", atime / etime); 390 391 /* average read megabytes 392 (per second) */ 393 (void)printf(" %8.2f", 394 cur.dk_rbytes[dn] / (1024.0 * 1024) / etime); 395 396 397 /* average write Kbytes per transfer */ 398 if (cur.dk_wxfer[dn]) 399 kbps = (cur.dk_wbytes[dn] / 1024.0) / cur.dk_wxfer[dn]; 400 else 401 kbps = 0.0; 402 (void)printf(" %8.2f", kbps); 403 404 /* average write transfers 405 (per second) */ 406 (void)printf(" %6.0f", cur.dk_wxfer[dn] / etime); 407 408 /* time write busy in disk activity */ 409 atime = (double)cur.dk_time[dn].tv_sec + 410 ((double)cur.dk_time[dn].tv_usec / (double)1000000); 411 (void)printf(" %6.2f", atime / etime); 412 413 /* average write megabytes 414 (per second) */ 415 (void)printf(" %8.2f\n", 416 cur.dk_wbytes[dn] / (1024.0 * 1024) / etime); 417 } 418 } 419 420 static void 421 cpustats(void) 422 { 423 int state; 424 double time; 425 426 time = 0; 427 for (state = 0; state < CPUSTATES; ++state) 428 time += cur.cp_time[state]; 429 if (!time) 430 time = 1.0; 431 /* States are generally never 100% and can use %3.0f. */ 432 for (state = 0; state < CPUSTATES; ++state) 433 printf(" %2.0f", 100. * cur.cp_time[state] / time); 434 } 435 436 static void 437 usage(void) 438 { 439 440 (void)fprintf(stderr, "usage: iostat [-CdDITx] [-c count] [-M core] " 441 "[-N system] [-w wait] [drives]\n"); 442 exit(1); 443 } 444 445 static void 446 display(void) 447 { 448 double etime; 449 450 /* Sum up the elapsed ticks. */ 451 etime = cur.cp_etime; 452 453 /* 454 * If we're showing totals only, then don't divide by the 455 * system time. 456 */ 457 if (ISSET(todo, SHOW_TOTALS)) 458 etime = 1.0; 459 460 if (ISSET(todo, SHOW_STATS_X)) { 461 disk_statsx(etime); 462 goto out; 463 } 464 465 if (ISSET(todo, SHOW_TTY)) 466 printf("%4.0f %4.0f", cur.tk_nin / etime, cur.tk_nout / etime); 467 468 if (ISSET(todo, SHOW_STATS_1)) 469 disk_stats(etime); 470 471 if (ISSET(todo, SHOW_STATS_2)) 472 disk_stats2(etime); 473 474 if (ISSET(todo, SHOW_CPU)) 475 cpustats(); 476 477 (void)printf("\n"); 478 479 out: 480 (void)fflush(stdout); 481 } 482 483 static int 484 selectdrives(int argc, char *argv[]) 485 { 486 int i, maxdrives, ndrives, tried; 487 488 /* 489 * Choose drives to be displayed. Priority goes to (in order) drives 490 * supplied as arguments and default drives. If everything isn't 491 * filled in and there are drives not taken care of, display the first 492 * few that fit. 493 * 494 * The backward compatibility #ifdefs permit the syntax: 495 * iostat [ drives ] [ interval [ count ] ] 496 */ 497 498 #define BACKWARD_COMPATIBILITY 499 for (tried = ndrives = 0; *argv; ++argv) { 500 #ifdef BACKWARD_COMPATIBILITY 501 if (isdigit(**argv)) 502 break; 503 #endif 504 tried++; 505 for (i = 0; i < dk_ndrive; i++) { 506 if (strcmp(cur.dk_name[i], *argv)) 507 continue; 508 cur.dk_select[i] = 1; 509 ++ndrives; 510 } 511 } 512 513 if (ndrives == 0 && tried == 0) { 514 /* 515 * Pick up to defdrives (or all if -x is given) drives 516 * if none specified. 517 */ 518 maxdrives = (ISSET(todo, SHOW_STATS_X) || 519 dk_ndrive < defdrives) ? dk_ndrive : defdrives; 520 for (i = 0; i < maxdrives; i++) { 521 cur.dk_select[i] = 1; 522 ++ndrives; 523 if (!ISSET(todo, SHOW_STATS_X) && ndrives == defdrives) 524 break; 525 } 526 } 527 528 #ifdef BACKWARD_COMPATIBILITY 529 if (*argv) { 530 interval = atoi(*argv); 531 if (*++argv) 532 reps = atoi(*argv); 533 } 534 #endif 535 536 if (interval) { 537 if (!reps) 538 reps = -1; 539 } else 540 if (reps) 541 interval = 1; 542 543 return (ndrives); 544 } 545
Indexes created Tue Sep 23 07:09:52 GMT 2025