| 1 | /*- |
| 2 | * Copyright (c) 1986, 1991 The Regents of the University of California. |
| 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. All advertising materials mentioning features or use of this software |
| 14 | * must display the following acknowledgement: |
| 15 | * This product includes software developed by the University of |
| 16 | * California, Berkeley and its contributors. |
| 17 | * 4. Neither the name of the University nor the names of its contributors |
| 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | */ |
| 33 | |
| 34 | #ifndef lint |
| 35 | char copyright[] = |
| 36 | "@(#) Copyright (c) 1986, 1991 The Regents of the University of California.\n\ |
| 37 | All rights reserved.\n"; |
| 38 | #endif /* not lint */ |
| 39 | |
| 40 | #ifndef lint |
| 41 | static char sccsid[] = "@(#)iostat.c 5.9 (Berkeley) 6/27/91"; |
| 42 | #endif /* not lint */ |
| 43 | |
| 44 | #include <sys/param.h> |
| 45 | #include <sys/buf.h> |
| 46 | #include <sys/dkstat.h> |
| 47 | #include <signal.h> |
| 48 | #include <fcntl.h> |
| 49 | #include <nlist.h> |
| 50 | #include <unistd.h> |
| 51 | #include <stdio.h> |
| 52 | #include <ctype.h> |
| 53 | #include <stdlib.h> |
| 54 | #include <string.h> |
| 55 | #include <paths.h> |
| 56 | #include <kvm.h> |
| 57 | |
| 58 | struct nlist nl[] = { |
| 59 | #define X_DK_TIME 0 |
| 60 | { "_dk_time" }, |
| 61 | #define X_DK_XFER 1 |
| 62 | { "_dk_xfer" }, |
| 63 | #define X_DK_WDS 2 |
| 64 | { "_dk_wds" }, |
| 65 | #define X_TK_NIN 3 |
| 66 | { "_tk_nin" }, |
| 67 | #define X_TK_NOUT 4 |
| 68 | { "_tk_nout" }, |
| 69 | #define X_DK_SEEK 5 |
| 70 | { "_dk_seek" }, |
| 71 | #define X_CP_TIME 6 |
| 72 | { "_cp_time" }, |
| 73 | #define X_DK_WPMS 7 |
| 74 | { "_dk_wpms" }, |
| 75 | #define X_HZ 8 |
| 76 | { "_hz" }, |
| 77 | #define X_PHZ 9 |
| 78 | { "_phz" }, |
| 79 | #define X_DK_NDRIVE 10 |
| 80 | { "_dk_ndrive" }, |
| 81 | #define X_END 10 |
| 82 | #ifdef hp300 |
| 83 | #define X_HPDINIT (X_END+1) |
| 84 | { "_hp_dinit" }, |
| 85 | #endif |
| 86 | #ifdef tahoe |
| 87 | #define X_VBDINIT (X_END+1) |
| 88 | { "_vbdinit" }, |
| 89 | #endif |
| 90 | #ifdef vax |
| 91 | { "_mbdinit" }, |
| 92 | #define X_MBDINIT (X_END+1) |
| 93 | { "_ubdinit" }, |
| 94 | #define X_UBDINIT (X_END+2) |
| 95 | #endif |
| 96 | #ifdef __FreeBSD__ |
| 97 | #define X_ISA_BIO (X_END+1) |
| 98 | { "_isa_devtab_bio" }, |
| 99 | #endif /* __FreeBSD__ */ |
| 100 | { NULL }, |
| 101 | }; |
| 102 | |
| 103 | struct _disk { |
| 104 | long cp_time[CPUSTATES]; |
| 105 | long *dk_time; |
| 106 | long *dk_wds; |
| 107 | long *dk_seek; |
| 108 | long *dk_xfer; |
| 109 | long tk_nin; |
| 110 | long tk_nout; |
| 111 | } cur, last; |
| 112 | |
| 113 | double etime; |
| 114 | long *dk_wpms; |
| 115 | int dk_ndrive, *dr_select, hz, kmemfd, ndrives; |
| 116 | char **dr_name; |
| 117 | |
| 118 | #define nlread(x, v) \ |
| 119 | kvm_read((void *)nl[x].n_value, (void *)&(v), sizeof(v)) |
| 120 | |
| 121 | #include "names.c" /* XXX */ |
| 122 | |
| 123 | static void cpustats __P((void)), dkstats __P((void)), phdr __P((int)); |
| 124 | static void usage __P((void)), err __P((const char *, ...)); |
| 125 | |
| 126 | main(argc, argv) |
| 127 | int argc; |
| 128 | char **argv; |
| 129 | { |
| 130 | register int i; |
| 131 | long tmp; |
| 132 | int ch, hdrcnt, reps, interval, phz, ndrives; |
| 133 | char **cp, *memfile, *namelist, buf[30]; |
| 134 | |
| 135 | interval = reps = 0; |
| 136 | namelist = memfile = NULL; |
| 137 | while ((ch = getopt(argc, argv, "c:M:N:w:")) != EOF) |
| 138 | switch(ch) { |
| 139 | case 'c': |
| 140 | reps = atoi(optarg); |
| 141 | break; |
| 142 | case 'M': |
| 143 | memfile = optarg; |
| 144 | break; |
| 145 | case 'N': |
| 146 | namelist = optarg; |
| 147 | break; |
| 148 | case 'w': |
| 149 | interval = atoi(optarg); |
| 150 | break; |
| 151 | case '?': |
| 152 | default: |
| 153 | usage(); |
| 154 | } |
| 155 | argc -= optind; |
| 156 | argv += optind; |
| 157 | |
| 158 | if (kvm_openfiles(namelist, memfile, NULL) == -1) |
| 159 | err("kvm_openfiles: %s", kvm_geterr()); |
| 160 | if (kvm_nlist(nl) == -1) |
| 161 | err("kvm_nlist: %s", kvm_geterr()); |
| 162 | if (nl[X_DK_NDRIVE].n_type == 0) |
| 163 | err("dk_ndrive not found in namelist"); |
| 164 | (void)nlread(X_DK_NDRIVE, dk_ndrive); |
| 165 | if (dk_ndrive <= 0) |
| 166 | err("invalid dk_ndrive %d\n", dk_ndrive); |
| 167 | |
| 168 | cur.dk_time = calloc(dk_ndrive, sizeof(long)); |
| 169 | cur.dk_wds = calloc(dk_ndrive, sizeof(long)); |
| 170 | cur.dk_seek = calloc(dk_ndrive, sizeof(long)); |
| 171 | cur.dk_xfer = calloc(dk_ndrive, sizeof(long)); |
| 172 | last.dk_time = calloc(dk_ndrive, sizeof(long)); |
| 173 | last.dk_wds = calloc(dk_ndrive, sizeof(long)); |
| 174 | last.dk_seek = calloc(dk_ndrive, sizeof(long)); |
| 175 | last.dk_xfer = calloc(dk_ndrive, sizeof(long)); |
| 176 | dr_select = calloc(dk_ndrive, sizeof(int)); |
| 177 | dr_name = calloc(dk_ndrive, sizeof(char *)); |
| 178 | dk_wpms = calloc(dk_ndrive, sizeof(long)); |
| 179 | |
| 180 | for (i = 0; i < dk_ndrive; i++) { |
| 181 | (void)sprintf(buf, "dk%d", i); |
| 182 | dr_name[i] = strdup(buf); |
| 183 | } |
| 184 | read_names(); |
| 185 | (void)nlread(X_HZ, hz); |
| 186 | (void)nlread(X_PHZ, phz); |
| 187 | if (phz) |
| 188 | hz = phz; |
| 189 | (void)kvm_read((void *)nl[X_DK_WPMS].n_value, dk_wpms, |
| 190 | dk_ndrive * sizeof(dk_wpms)); |
| 191 | |
| 192 | /* |
| 193 | * Choose drives to be displayed. Priority goes to (in order) drives |
| 194 | * supplied as arguments and default drives. If everything isn't |
| 195 | * filled in and there are drives not taken care of, display the first |
| 196 | * few that fit. |
| 197 | * |
| 198 | * The backward compatibility #ifdefs permit the syntax: |
| 199 | * iostat [ drives ] [ interval [ count ] ] |
| 200 | */ |
| 201 | #define BACKWARD_COMPATIBILITY |
| 202 | for (ndrives = 0; *argv; ++argv) { |
| 203 | #ifdef BACKWARD_COMPATIBILITY |
| 204 | if (isdigit(**argv)) |
| 205 | break; |
| 206 | #endif |
| 207 | for (i = 0; i < dk_ndrive; i++) { |
| 208 | if (strcmp(dr_name[i], *argv)) |
| 209 | continue; |
| 210 | dr_select[i] = 1; |
| 211 | ++ndrives; |
| 212 | } |
| 213 | } |
| 214 | #ifdef BACKWARD_COMPATIBILITY |
| 215 | if (*argv) { |
| 216 | interval = atoi(*argv); |
| 217 | if (*++argv) |
| 218 | reps = atoi(*argv); |
| 219 | } |
| 220 | #endif |
| 221 | |
| 222 | if (interval) { |
| 223 | if (!reps) |
| 224 | reps = -1; |
| 225 | } else |
| 226 | if (reps) |
| 227 | interval = 1; |
| 228 | |
| 229 | for (i = 0; i < dk_ndrive && ndrives < 4; i++) { |
| 230 | if (dr_select[i] || dk_wpms[i] == 0) |
| 231 | continue; |
| 232 | for (cp = defdrives; *cp; cp++) |
| 233 | if (strcmp(dr_name[i], *cp) == 0) { |
| 234 | dr_select[i] = 1; |
| 235 | ++ndrives; |
| 236 | break; |
| 237 | } |
| 238 | } |
| 239 | for (i = 0; i < dk_ndrive && ndrives < 4; i++) { |
| 240 | if (dr_select[i]) |
| 241 | continue; |
| 242 | dr_select[i] = 1; |
| 243 | ++ndrives; |
| 244 | } |
| 245 | |
| 246 | (void)signal(SIGCONT, phdr); |
| 247 | |
| 248 | for (hdrcnt = 1;;) { |
| 249 | if (!--hdrcnt) { |
| 250 | phdr(0); |
| 251 | hdrcnt = 20; |
| 252 | } |
| 253 | (void)kvm_read((void *)nl[X_DK_TIME].n_value, |
| 254 | cur.dk_time, dk_ndrive * sizeof(long)); |
| 255 | (void)kvm_read((void *)nl[X_DK_XFER].n_value, |
| 256 | cur.dk_xfer, dk_ndrive * sizeof(long)); |
| 257 | (void)kvm_read((void *)nl[X_DK_WDS].n_value, |
| 258 | cur.dk_wds, dk_ndrive * sizeof(long)); |
| 259 | (void)kvm_read((void *)nl[X_DK_SEEK].n_value, |
| 260 | cur.dk_seek, dk_ndrive * sizeof(long)); |
| 261 | (void)kvm_read((void *)nl[X_TK_NIN].n_value, |
| 262 | &cur.tk_nin, sizeof(cur.tk_nin)); |
| 263 | (void)kvm_read((void *)nl[X_TK_NOUT].n_value, |
| 264 | &cur.tk_nout, sizeof(cur.tk_nout)); |
| 265 | (void)kvm_read((void *)nl[X_CP_TIME].n_value, |
| 266 | cur.cp_time, sizeof(cur.cp_time)); |
| 267 | for (i = 0; i < dk_ndrive; i++) { |
| 268 | if (!dr_select[i]) |
| 269 | continue; |
| 270 | #define X(fld) tmp = cur.fld[i]; cur.fld[i] -= last.fld[i]; last.fld[i] = tmp |
| 271 | X(dk_xfer); |
| 272 | X(dk_seek); |
| 273 | X(dk_wds); |
| 274 | X(dk_time); |
| 275 | } |
| 276 | tmp = cur.tk_nin; |
| 277 | cur.tk_nin -= last.tk_nin; |
| 278 | last.tk_nin = tmp; |
| 279 | tmp = cur.tk_nout; |
| 280 | cur.tk_nout -= last.tk_nout; |
| 281 | last.tk_nout = tmp; |
| 282 | etime = 0; |
| 283 | for (i = 0; i < CPUSTATES; i++) { |
| 284 | X(cp_time); |
| 285 | etime += cur.cp_time[i]; |
| 286 | } |
| 287 | if (etime == 0.0) |
| 288 | etime = 1.0; |
| 289 | etime /= (float)hz; |
| 290 | (void)printf("%4.0f%5.0f", |
| 291 | cur.tk_nin / etime, cur.tk_nout / etime); |
| 292 | dkstats(); |
| 293 | cpustats(); |
| 294 | (void)printf("\n"); |
| 295 | (void)fflush(stdout); |
| 296 | |
| 297 | if (reps >= 0 && --reps <= 0) |
| 298 | break; |
| 299 | (void)sleep(interval); |
| 300 | } |
| 301 | exit(0); |
| 302 | } |
| 303 | |
| 304 | /* ARGUSED */ |
| 305 | void |
| 306 | phdr(notused) |
| 307 | int notused; |
| 308 | { |
| 309 | register int i; |
| 310 | |
| 311 | (void)printf(" tty"); |
| 312 | for (i = 0; i < dk_ndrive; i++) |
| 313 | if (dr_select[i]) |
| 314 | (void)printf(" %3.3s ", dr_name[i]); |
| 315 | (void)printf(" cpu\n tin tout"); |
| 316 | for (i = 0; i < dk_ndrive; i++) |
| 317 | if (dr_select[i]) |
| 318 | (void)printf(" sps tps msps "); |
| 319 | (void)printf(" us ni sy id\n"); |
| 320 | } |
| 321 | |
| 322 | void |
| 323 | dkstats() |
| 324 | { |
| 325 | register int dn; |
| 326 | double atime, itime, msps, words, xtime; |
| 327 | |
| 328 | for (dn = 0; dn < dk_ndrive; ++dn) { |
| 329 | if (!dr_select[dn]) |
| 330 | continue; |
| 331 | words = cur.dk_wds[dn] * 32; /* words xfer'd */ |
| 332 | (void)printf("%4.0f", /* sectors */ |
| 333 | words / (DEV_BSIZE / 2) / etime); |
| 334 | |
| 335 | (void)printf("%4.0f", cur.dk_xfer[dn] / etime); |
| 336 | |
| 337 | if (dk_wpms[dn] && cur.dk_xfer[dn]) { |
| 338 | atime = cur.dk_time[dn]; /* ticks disk busy */ |
| 339 | atime /= (float)hz; /* ticks to seconds */ |
| 340 | xtime = words / dk_wpms[dn]; /* transfer time */ |
| 341 | itime = atime - xtime; /* time not xfer'ing */ |
| 342 | if (itime < 0) |
| 343 | msps = 0; |
| 344 | else |
| 345 | msps = itime * 1000 / cur.dk_xfer[dn]; |
| 346 | } else |
| 347 | msps = 0; |
| 348 | (void)printf("%5.1f ", msps); |
| 349 | } |
| 350 | } |
| 351 | |
| 352 | void |
| 353 | cpustats() |
| 354 | { |
| 355 | register int state; |
| 356 | double time; |
| 357 | |
| 358 | time = 0; |
| 359 | for (state = 0; state < CPUSTATES; ++state) |
| 360 | time += cur.cp_time[state]; |
| 361 | for (state = 0; state < CPUSTATES; ++state) |
| 362 | (void)printf("%3.0f", |
| 363 | 100. * cur.cp_time[state] / (time ? time : 1)); |
| 364 | } |
| 365 | |
| 366 | void |
| 367 | usage() |
| 368 | { |
| 369 | (void)fprintf(stderr, |
| 370 | "usage: iostat [-c count] [-M core] [-N system] [-w wait] [drives]\n"); |
| 371 | exit(1); |
| 372 | } |
| 373 | |
| 374 | #if __STDC__ |
| 375 | #include <stdarg.h> |
| 376 | #else |
| 377 | #include <varargs.h> |
| 378 | #endif |
| 379 | |
| 380 | void |
| 381 | #if __STDC__ |
| 382 | err(const char *fmt, ...) |
| 383 | #else |
| 384 | err(fmt, va_alist) |
| 385 | char *fmt; |
| 386 | va_dcl |
| 387 | #endif |
| 388 | { |
| 389 | va_list ap; |
| 390 | #if __STDC__ |
| 391 | va_start(ap, fmt); |
| 392 | #else |
| 393 | va_start(ap); |
| 394 | #endif |
| 395 | (void)fprintf(stderr, "iostat: "); |
| 396 | (void)vfprintf(stderr, fmt, ap); |
| 397 | va_end(ap); |
| 398 | (void)fprintf(stderr, "\n"); |
| 399 | exit(1); |
| 400 | /* NOTREACHED */ |
| 401 | } |