iostat.c revision 1.51
1 /* $NetBSD: iostat.c,v 1.51 2007/06/24 23:25:13 christos 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 1.51 2007/06/24 23:25:13 christos 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 tkswap(); 228 } 229 230 display(); 231 232 if (reps >= 0 && --reps <= 0) 233 break; 234 nanosleep(&tv, NULL); 235 cpureadstats(); 236 drvreadstats(); 237 } 238 exit(0); 239 } 240 241 static void 242 sig_header(int signo) 243 { 244 do_header = 1; 245 } 246 247 static void 248 header() 249 { 250 int i; 251 252 /* Main Headers. */ 253 if (ISSET(todo, SHOW_STATS_X)) { 254 if (ISSET(todo, SHOW_TOTALS)) { 255 (void)printf( 256 "device read KB/t xfr time MB "); 257 (void)printf(" write KB/t xfr time MB\n"); 258 } else { 259 (void)printf( 260 "device read KB/t r/s time MB/s"); 261 (void)printf(" write KB/t w/s time MB/s\n"); 262 } 263 return; 264 } 265 266 if (ISSET(todo, SHOW_TTY)) 267 (void)printf(" tty"); 268 269 if (ISSET(todo, SHOW_STATS_1)) { 270 for (i = 0; i < ndrive; i++) 271 if (cur.select[i]) 272 (void)printf(" %9.9s ", cur.name[i]); 273 } 274 275 if (ISSET(todo, SHOW_STATS_2)) { 276 for (i = 0; i < ndrive; i++) 277 if (cur.select[i]) 278 (void)printf(" %9.9s ", cur.name[i]); 279 } 280 281 if (ISSET(todo, SHOW_CPU)) 282 (void)printf(" CPU"); 283 284 printf("\n"); 285 286 /* Sub-Headers. */ 287 if (ISSET(todo, SHOW_TTY)) 288 printf(" tin tout"); 289 290 if (ISSET(todo, SHOW_STATS_1)) { 291 for (i = 0; i < ndrive; i++) 292 if (cur.select[i]) { 293 if (ISSET(todo, SHOW_TOTALS)) 294 (void)printf(" KB/t xfr MB "); 295 else 296 (void)printf(" KB/t t/s MB/s "); 297 } 298 } 299 300 if (ISSET(todo, SHOW_STATS_2)) { 301 for (i = 0; i < ndrive; i++) 302 if (cur.select[i]) 303 (void)printf(" KB xfr time "); 304 } 305 306 if (ISSET(todo, SHOW_CPU)) 307 (void)printf(" us ni sy in id"); 308 printf("\n"); 309 } 310 311 static void 312 drive_stats(double etime) 313 { 314 int dn; 315 double atime, mbps; 316 317 for (dn = 0; dn < ndrive; ++dn) { 318 if (!cur.select[dn]) 319 continue; 320 /* average Kbytes per transfer. */ 321 if (cur.rxfer[dn] + cur.wxfer[dn]) 322 mbps = ((cur.rbytes[dn] + cur.wbytes[dn]) / 323 1024.0) / (cur.rxfer[dn] + cur.wxfer[dn]); 324 else 325 mbps = 0.0; 326 (void)printf(" %5.2f", mbps); 327 328 /* average transfers per second. */ 329 (void)printf(" %4.0f", 330 (cur.rxfer[dn] + cur.wxfer[dn]) / etime); 331 332 /* time busy in drive activity */ 333 atime = (double)cur.time[dn].tv_sec + 334 ((double)cur.time[dn].tv_usec / (double)1000000); 335 336 /* Megabytes per second. */ 337 if (atime != 0.0) 338 mbps = (cur.rbytes[dn] + cur.wbytes[dn]) / 339 (double)(1024 * 1024); 340 else 341 mbps = 0; 342 (void)printf(" %5.2f ", mbps / etime); 343 } 344 } 345 346 static void 347 drive_stats2(double etime) 348 { 349 int dn; 350 double atime; 351 352 for (dn = 0; dn < ndrive; ++dn) { 353 if (!cur.select[dn]) 354 continue; 355 356 /* average kbytes per second. */ 357 (void)printf(" %5.0f", 358 (cur.rbytes[dn] + cur.wbytes[dn]) / 1024.0 / etime); 359 360 /* average transfers per second. */ 361 (void)printf(" %5.0f", 362 (cur.rxfer[dn] + cur.wxfer[dn]) / etime); 363 364 /* average time busy in drive activity */ 365 atime = (double)cur.time[dn].tv_sec + 366 ((double)cur.time[dn].tv_usec / (double)1000000); 367 (void)printf(" %4.2f ", atime / etime); 368 } 369 } 370 371 static void 372 drive_statsx(double etime) 373 { 374 int dn; 375 double atime, kbps; 376 377 for (dn = 0; dn < ndrive; ++dn) { 378 if (!cur.select[dn]) 379 continue; 380 381 (void)printf("%-8.8s", cur.name[dn]); 382 383 /* average read Kbytes per transfer */ 384 if (cur.rxfer[dn]) 385 kbps = (cur.rbytes[dn] / 1024.0) / cur.rxfer[dn]; 386 else 387 kbps = 0.0; 388 (void)printf(" %8.2f", kbps); 389 390 /* average read transfers 391 (per second) */ 392 (void)printf(" %6.0f", cur.rxfer[dn] / etime); 393 394 /* time read busy in drive activity */ 395 atime = (double)cur.time[dn].tv_sec + 396 ((double)cur.time[dn].tv_usec / (double)1000000); 397 (void)printf(" %6.2f", atime / etime); 398 399 /* average read megabytes 400 (per second) */ 401 (void)printf(" %8.2f", 402 cur.rbytes[dn] / (1024.0 * 1024) / etime); 403 404 405 /* average write Kbytes per transfer */ 406 if (cur.wxfer[dn]) 407 kbps = (cur.wbytes[dn] / 1024.0) / cur.wxfer[dn]; 408 else 409 kbps = 0.0; 410 (void)printf(" %8.2f", kbps); 411 412 /* average write transfers 413 (per second) */ 414 (void)printf(" %6.0f", cur.wxfer[dn] / etime); 415 416 /* time write busy in drive activity */ 417 atime = (double)cur.time[dn].tv_sec + 418 ((double)cur.time[dn].tv_usec / (double)1000000); 419 (void)printf(" %6.2f", atime / etime); 420 421 /* average write megabytes 422 (per second) */ 423 (void)printf(" %8.2f\n", 424 cur.wbytes[dn] / (1024.0 * 1024) / etime); 425 } 426 } 427 428 static void 429 cpustats(void) 430 { 431 int state; 432 double time; 433 434 time = 0; 435 for (state = 0; state < CPUSTATES; ++state) 436 time += cur.cp_time[state]; 437 if (!time) 438 time = 1.0; 439 /* States are generally never 100% and can use %3.0f. */ 440 for (state = 0; state < CPUSTATES; ++state) 441 printf(" %2.0f", 100. * cur.cp_time[state] / time); 442 } 443 444 static void 445 usage(void) 446 { 447 448 (void)fprintf(stderr, "usage: iostat [-CdDITx] [-c count] [-M core] " 449 "[-N system] [-w wait] [drives]\n"); 450 exit(1); 451 } 452 453 static void 454 display(void) 455 { 456 double etime; 457 458 /* Sum up the elapsed ticks. */ 459 etime = cur.cp_etime; 460 461 /* 462 * If we're showing totals only, then don't divide by the 463 * system time. 464 */ 465 if (ISSET(todo, SHOW_TOTALS)) 466 etime = 1.0; 467 468 if (ISSET(todo, SHOW_STATS_X)) { 469 drive_statsx(etime); 470 goto out; 471 } 472 473 if (ISSET(todo, SHOW_TTY)) 474 printf("%4.0f %4.0f", cur.tk_nin / etime, cur.tk_nout / etime); 475 476 if (ISSET(todo, SHOW_STATS_1)) { 477 drive_stats(etime); 478 } 479 480 481 if (ISSET(todo, SHOW_STATS_2)) { 482 drive_stats2(etime); 483 } 484 485 486 if (ISSET(todo, SHOW_CPU)) 487 cpustats(); 488 489 (void)printf("\n"); 490 491 out: 492 (void)fflush(stdout); 493 } 494 495 static int 496 selectdrives(int argc, char *argv[]) 497 { 498 int i, maxdrives, ndrives, tried; 499 500 /* 501 * Choose drives to be displayed. Priority goes to (in order) drives 502 * supplied as arguments and default drives. If everything isn't 503 * filled in and there are drives not taken care of, display the first 504 * few that fit. 505 * 506 * The backward compatibility #ifdefs permit the syntax: 507 * iostat [ drives ] [ interval [ count ] ] 508 */ 509 510 #define BACKWARD_COMPATIBILITY 511 for (tried = ndrives = 0; *argv; ++argv) { 512 #ifdef BACKWARD_COMPATIBILITY 513 if (isdigit((unsigned char)**argv)) 514 break; 515 #endif 516 tried++; 517 for (i = 0; i < ndrive; i++) { 518 if (strcmp(cur.name[i], *argv)) 519 continue; 520 cur.select[i] = 1; 521 ++ndrives; 522 } 523 524 } 525 526 if (ndrives == 0 && tried == 0) { 527 /* 528 * Pick up to defdrives (or all if -x is given) drives 529 * if none specified. 530 */ 531 maxdrives = (ISSET(todo, SHOW_STATS_X) || 532 ndrive < defdrives) 533 ? (ndrive) : defdrives; 534 for (i = 0; i < maxdrives; i++) { 535 cur.select[i] = 1; 536 537 ++ndrives; 538 if (!ISSET(todo, SHOW_STATS_X) && ndrives == defdrives) 539 break; 540 } 541 } 542 543 #ifdef BACKWARD_COMPATIBILITY 544 if (*argv) { 545 interval = atoi(*argv); 546 if (*++argv) 547 reps = atoi(*argv); 548 } 549 #endif 550 551 if (interval) { 552 if (!reps) 553 reps = -1; 554 } else 555 if (reps) 556 interval = 1; 557 558 return (ndrives); 559 } 560
Indexes created Mon Sep 22 05:09:51 GMT 2025