1 /* $NetBSD: iostat.c,v 1.26 2002/05/22 13:12:27 simonb 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. 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 #include <sys/cdefs.h> 69 #ifndef lint 70 __COPYRIGHT("@(#) Copyright (c) 1986, 1991, 1993\n\ 71 The Regents of the University of California. All rights reserved.\n"); 72 #endif /* not lint */ 73 74 #ifndef lint 75 #if 0 76 static char sccsid[] = "@(#)iostat.c 8.3 (Berkeley) 4/28/95"; 77 #else 78 __RCSID("$NetBSD: iostat.c,v 1.26 2002/05/22 13:12:27 simonb Exp $"); 79 #endif 80 #endif /* not lint */ 81 82 #include <sys/types.h> 83 #include <sys/sched.h> 84 #include <sys/dkstat.h> 85 #include <sys/time.h> 86 87 #include <err.h> 88 #include <ctype.h> 89 #include <signal.h> 90 #include <stdio.h> 91 #include <stdlib.h> 92 #include <string.h> 93 #include <unistd.h> 94 95 #include "dkstats.h" 96 97 /* Namelist and memory files. */ 98 char *nlistf, *memf; 99 100 int hz, reps, interval; 101 static int todo = 0; 102 103 #define ISSET(x, a) ((x) & (a)) 104 #define SHOW_CPU 1<<0 105 #define SHOW_TTY 1<<1 106 #define SHOW_STATS_1 1<<2 107 #define SHOW_STATS_2 1<<3 108 #define SHOW_STATS_X 1<<4 109 #define SHOW_TOTALS 1<<7 110 #define SHOW_STATS_ALL (SHOW_STATS_1 | SHOW_STATS_2 | SHOW_STATS_X) 111 112 static void cpustats(void); 113 static void disk_stats(double); 114 static void disk_stats2(double); 115 static void disk_statsx(double); 116 static void header(int); 117 static void usage(void); 118 static void display(void); 119 static void selectdrives(int, char **); 120 121 int main(int, char **); 122 123 int 124 main(int argc, char *argv[]) 125 { 126 int ch, hdrcnt; 127 struct timeval tv; 128 129 while ((ch = getopt(argc, argv, "Cc:dDIM:N:Tw:x")) != -1) 130 switch(ch) { 131 case 'c': 132 if ((reps = atoi(optarg)) <= 0) 133 errx(1, "repetition count <= 0."); 134 break; 135 case 'C': 136 todo |= SHOW_CPU; 137 break; 138 case 'd': 139 todo &= ~SHOW_STATS_ALL; 140 todo |= SHOW_STATS_1; 141 break; 142 case 'D': 143 todo &= ~SHOW_STATS_ALL; 144 todo |= SHOW_STATS_2; 145 break; 146 case 'I': 147 todo |= SHOW_TOTALS; 148 break; 149 case 'M': 150 memf = optarg; 151 break; 152 case 'N': 153 nlistf = optarg; 154 break; 155 case 'T': 156 todo |= SHOW_TTY; 157 break; 158 case 'w': 159 if ((interval = atoi(optarg)) <= 0) 160 errx(1, "interval <= 0."); 161 break; 162 case 'x': 163 todo &= ~SHOW_STATS_ALL; 164 todo |= SHOW_STATS_X; 165 break; 166 case '?': 167 default: 168 usage(); 169 } 170 argc -= optind; 171 argv += optind; 172 173 if (!ISSET(todo, SHOW_CPU | SHOW_TTY | SHOW_STATS_ALL)) 174 todo |= SHOW_CPU | SHOW_TTY | SHOW_STATS_1; 175 if (ISSET(todo, SHOW_STATS_X)) { 176 todo &= ~(SHOW_CPU | SHOW_TTY | SHOW_STATS_ALL); 177 todo |= SHOW_STATS_X; 178 } 179 180 dkinit(0); 181 dkreadstats(); 182 selectdrives(argc, argv); 183 184 tv.tv_sec = interval; 185 tv.tv_usec = 0; 186 187 /* print a new header on sigcont */ 188 (void)signal(SIGCONT, header); 189 190 for (hdrcnt = 1;;) { 191 if (!--hdrcnt) { 192 header(0); 193 hdrcnt = 20; 194 } 195 196 if (!ISSET(todo, SHOW_TOTALS)) 197 dkswap(); 198 display(); 199 200 if (reps >= 0 && --reps <= 0) 201 break; 202 select(0, NULL, NULL, NULL, &tv); 203 dkreadstats(); 204 } 205 exit(0); 206 } 207 208 static void 209 header(int signo) 210 { 211 int i; 212 213 if (ISSET(todo, SHOW_STATS_X)) 214 return; 215 216 /* Main Headers. */ 217 if (ISSET(todo, SHOW_TTY)) 218 (void)printf(" tty"); 219 220 if (ISSET(todo, SHOW_STATS_1)) 221 for (i = 0; i < dk_ndrive; i++) 222 if (cur.dk_select[i]) 223 (void)printf( 224 " %7.7s ", cur.dk_name[i]); 225 226 if (ISSET(todo, SHOW_STATS_2)) 227 for (i = 0; i < dk_ndrive; i++) 228 if (cur.dk_select[i]) 229 (void)printf( 230 " %7.7s ", cur.dk_name[i]); 231 232 if (ISSET(todo, SHOW_CPU)) 233 (void)printf(" cpu"); 234 235 printf("\n"); 236 237 /* Sub-Headers. */ 238 if (ISSET(todo, SHOW_TTY)) 239 printf(" tin tout"); 240 241 if (ISSET(todo, SHOW_STATS_1)) { 242 for (i = 0; i < dk_ndrive; i++) 243 if (cur.dk_select[i]) { 244 if (ISSET(todo, SHOW_TOTALS)) 245 (void)printf(" KB/t xfr MB "); 246 else 247 (void)printf(" KB/t t/s MB/s "); 248 } 249 } 250 251 if (ISSET(todo, SHOW_STATS_2)) 252 for (i = 0; i < dk_ndrive; i++) 253 if (cur.dk_select[i]) 254 (void)printf(" KB xfr time "); 255 256 if (ISSET(todo, SHOW_CPU)) 257 (void)printf(" us ni sy in id"); 258 printf("\n"); 259 } 260 261 static void 262 disk_stats(double etime) 263 { 264 int dn; 265 double atime, mbps; 266 267 for (dn = 0; dn < dk_ndrive; ++dn) { 268 if (!cur.dk_select[dn]) 269 continue; 270 271 /* average Kbytes per transfer. */ 272 if (cur.dk_xfer[dn]) 273 mbps = (cur.dk_bytes[dn] / (1024.0)) / cur.dk_xfer[dn]; 274 else 275 mbps = 0.0; 276 (void)printf(" %5.2f", mbps); 277 278 /* average transfers per second. */ 279 (void)printf(" %3.0f", cur.dk_xfer[dn] / etime); 280 281 /* time busy in disk activity */ 282 atime = (double)cur.dk_time[dn].tv_sec + 283 ((double)cur.dk_time[dn].tv_usec / (double)1000000); 284 285 /* Megabytes per second. */ 286 if (atime != 0.0) 287 mbps = cur.dk_bytes[dn] / (double)(1024 * 1024); 288 else 289 mbps = 0; 290 (void)printf(" %4.2f ", mbps / etime); 291 } 292 } 293 294 static void 295 disk_stats2(double etime) 296 { 297 int dn; 298 double atime; 299 300 for (dn = 0; dn < dk_ndrive; ++dn) { 301 if (!cur.dk_select[dn]) 302 continue; 303 304 /* average kbytes per second. */ 305 (void)printf(" %4.0f", cur.dk_bytes[dn] / (1024.0) / etime); 306 307 /* average transfers per second. */ 308 (void)printf(" %3.0f", cur.dk_xfer[dn] / etime); 309 310 /* average time busy in disk activity */ 311 atime = (double)cur.dk_time[dn].tv_sec + 312 ((double)cur.dk_time[dn].tv_usec / (double)1000000); 313 (void)printf(" %4.2f ", atime / etime); 314 } 315 } 316 317 static void 318 disk_statsx(double etime) 319 { 320 int dn; 321 double atime, kbps; 322 323 if (ISSET(todo, SHOW_TOTALS)) 324 (void)printf("device KB/t xfr time MB"); 325 else 326 (void)printf("device KB/t t/s time MB/s"); 327 328 for (dn = 0; dn < dk_ndrive; ++dn) { 329 (void)printf("\n"); 330 (void)printf("%-8.8s", cur.dk_name[dn]); 331 332 /* average Kbytes per transfer */ 333 if (cur.dk_xfer[dn]) 334 kbps = (cur.dk_bytes[dn] / (1024.0)) / cur.dk_xfer[dn]; 335 else 336 kbps = 0.0; 337 (void)printf(" %8.2f", kbps); 338 339 /* average transfers (per second) */ 340 (void)printf(" %8.0f", cur.dk_xfer[dn] / etime); 341 342 /* time busy in disk activity */ 343 atime = (double)cur.dk_time[dn].tv_sec + 344 ((double)cur.dk_time[dn].tv_usec / (double)1000000); 345 (void)printf(" %8.2f", atime / etime); 346 347 /* average megabytes (per second) */ 348 (void)printf(" %8.2f", 349 cur.dk_bytes[dn] / (1024.0 * 1024) / etime); 350 351 } 352 } 353 354 static void 355 cpustats(void) 356 { 357 int state; 358 double time; 359 360 time = 0; 361 for (state = 0; state < CPUSTATES; ++state) 362 time += cur.cp_time[state]; 363 if (!time) 364 time = 1.0; 365 /* States are generally never 100% and can use %3.0f. */ 366 for (state = 0; state < CPUSTATES; ++state) 367 printf(" %2.0f", 100. * cur.cp_time[state] / time); 368 } 369 370 static void 371 usage(void) 372 { 373 374 (void)fprintf(stderr, "usage: iostat [-CdDITx] [-c count] [-M core] \ 375 [-N system] [-w wait] [drives]\n"); 376 exit(1); 377 } 378 379 static void 380 display(void) 381 { 382 int i; 383 double etime; 384 385 /* Sum up the elapsed ticks. */ 386 etime = 0.0; 387 for (i = 0; i < CPUSTATES; i++) { 388 etime += cur.cp_time[i]; 389 } 390 if (etime == 0.0) 391 etime = 1.0; 392 /* Convert to seconds. */ 393 etime /= (float)hz; 394 395 /* If we're showing totals only, then don't divide by the 396 * system time. 397 */ 398 if (ISSET(todo, SHOW_TOTALS)) 399 etime = 1.0; 400 401 if (ISSET(todo, SHOW_TTY)) 402 printf("%4.0f %4.0f", cur.tk_nin / etime, cur.tk_nout / etime); 403 404 if (ISSET(todo, SHOW_STATS_1)) 405 disk_stats(etime); 406 407 if (ISSET(todo, SHOW_STATS_2)) 408 disk_stats2(etime); 409 410 if (ISSET(todo, SHOW_STATS_X)) 411 disk_statsx(etime); 412 413 if (ISSET(todo, SHOW_CPU)) 414 cpustats(); 415 416 (void)printf("\n"); 417 (void)fflush(stdout); 418 } 419 420 static void 421 selectdrives(int argc, char *argv[]) 422 { 423 int i, ndrives; 424 425 /* 426 * Choose drives to be displayed. Priority goes to (in order) drives 427 * supplied as arguments and default drives. If everything isn't 428 * filled in and there are drives not taken care of, display the first 429 * few that fit. 430 * 431 * The backward compatibility #ifdefs permit the syntax: 432 * iostat [ drives ] [ interval [ count ] ] 433 */ 434 if (ISSET(todo, SHOW_STATS_X)) { 435 for (i = 0; i < dk_ndrive; i++) 436 cur.dk_select[i] = 1; 437 } 438 439 #define BACKWARD_COMPATIBILITY 440 for (ndrives = 0; *argv; ++argv) { 441 #ifdef BACKWARD_COMPATIBILITY 442 if (isdigit(**argv)) 443 break; 444 #endif 445 if (!ISSET(todo, SHOW_STATS_X)) 446 for (i = 0; i < dk_ndrive; i++) { 447 if (strcmp(cur.dk_name[i], *argv)) 448 continue; 449 cur.dk_select[i] = 1; 450 ++ndrives; 451 } 452 } 453 #ifdef BACKWARD_COMPATIBILITY 454 if (*argv) { 455 interval = atoi(*argv); 456 if (*++argv) 457 reps = atoi(*argv); 458 } 459 #endif 460 461 if (interval) { 462 if (!reps) 463 reps = -1; 464 } else 465 if (reps) 466 interval = 1; 467 468 /* Pick up to 4 drives if none specified. */ 469 if (ndrives == 0) 470 for (i = 0; i < dk_ndrive && ndrives < 4; i++) { 471 if (cur.dk_select[i]) 472 continue; 473 cur.dk_select[i] = 1; 474 ++ndrives; 475 } 476 } 477