usr.bin/vmstat/vmstat.c

   1 /*
   2  * Copyright (c) 1980, 1986, 1991, 1993
   3  *      The Regents of the University of California.  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 static const char copyright[] =
  36 "@(#) Copyright (c) 1980, 1986, 1991, 1993\n\
  37         The Regents of the University of California.  All rights reserved.\n";
  38 #endif /* not lint */
  39
  40 #ifndef lint
  41 #if 0
  42 static char sccsid[] = "@(#)vmstat.c    8.1 (Berkeley) 6/6/93";
  43 #endif
  44 static const char rcsid[] =
  45   "$FreeBSD: src/usr.bin/vmstat/vmstat.c,v 1.38.2.4 2001/07/31 19:52:41 tmm Exp $";
  46 #endif /* not lint */
  47
  48 #include <sys/param.h>
  49 #include <sys/time.h>
  50 #include <sys/proc.h>
  51 #include <sys/dkstat.h>
  52 #include <sys/uio.h>
  53 #include <sys/namei.h>
  54 #include <sys/malloc.h>
  55 #include <sys/signal.h>
  56 #include <sys/fcntl.h>
  57 #include <sys/ioctl.h>
  58 #include <sys/sysctl.h>
  59 #include <sys/vmmeter.h>
  60
  61 #include <vm/vm_param.h>
  62
  63 #include <ctype.h>
  64 #include <err.h>
  65 #include <errno.h>
  66 #include <kvm.h>
  67 #include <limits.h>
  68 #include <nlist.h>
  69 #include <paths.h>
  70 #include <stdio.h>
  71 #include <stdlib.h>
  72 #include <string.h>
  73 #include <sysexits.h>
  74 #include <time.h>
  75 #include <unistd.h>
  76 #include <devstat.h>
  77
  78 struct nlist namelist[] = {
  79 #define X_CPTIME        0
  80         { "_cp_time" },
  81 #define X_SUM           1
  82         { "_cnt" },
  83 #define X_BOOTTIME      2
  84         { "_boottime" },
  85 #define X_HZ            3
  86         { "_hz" },
  87 #define X_STATHZ        4
  88         { "_stathz" },
  89 #define X_NCHSTATS      5
  90         { "_nchstats" },
  91 #define X_INTRNAMES     6
  92         { "_intrnames" },
  93 #define X_EINTRNAMES    7
  94         { "_eintrnames" },
  95 #define X_INTRCNT       8
  96         { "_intrcnt" },
  97 #define X_EINTRCNT      9
  98         { "_eintrcnt" },
  99 #define X_KMEMSTATISTICS        10
 100         { "_kmemstatistics" },
 101 #define X_KMEMBUCKETS   11
 102         { "_bucket" },
 103 #define X_ZLIST         12
 104         { "_zlist" },
 105 #ifdef notyet
 106 #define X_DEFICIT       13
 107         { "_deficit" },
 108 #define X_FORKSTAT      14
 109         { "_forkstat" },
 110 #define X_REC           15
 111         { "_rectime" },
 112 #define X_PGIN          16
 113         { "_pgintime" },
 114 #define X_XSTATS        17
 115         { "_xstats" },
 116 #define X_END           18
 117 #else
 118 #define X_END           13
 119 #endif
 120         { "" },
 121 };
 122
 123 struct statinfo cur, last;
 124 int num_devices, maxshowdevs;
 125 long generation;
 126 struct device_selection *dev_select;
 127 int num_selected;
 128 struct devstat_match *matches;
 129 int num_matches = 0;
 130 int num_devices_specified, num_selections;
 131 long select_generation;
 132 char **specified_devices;
 133 devstat_select_mode select_mode;
 134
 135 struct  vmmeter sum, osum;
 136
 137 int     winlines = 20;
 138 int     nflag = 0;
 139
 140 kvm_t *kd;
 141
 142 #define FORKSTAT        0x01
 143 #define INTRSTAT        0x02
 144 #define MEMSTAT         0x04
 145 #define SUMSTAT         0x08
 146 #define TIMESTAT        0x10
 147 #define VMSTAT          0x20
 148 #define ZMEMSTAT        0x40
 149
 150 void    cpustats(), dointr(), domem(), dosum(), dozmem();
 151 void    dovmstat(), kread(), usage();
 152 #ifdef notyet
 153 void    dotimes(), doforkst();
 154 #endif
 155 void printhdr __P((void));
 156 static void devstats();
 157
 158 int
 159 main(argc, argv)
 160         register int argc;
 161         register char **argv;
 162 {
 163         register int c, todo;
 164         u_int interval;
 165         int reps;
 166         char *memf, *nlistf;
 167         char errbuf[_POSIX2_LINE_MAX];
 168
 169         memf = nlistf = NULL;
 170         interval = reps = todo = 0;
 171         maxshowdevs = 2;
 172         while ((c = getopt(argc, argv, "c:fiM:mN:n:p:stw:z")) != -1) {
 173                 switch (c) {
 174                 case 'c':
 175                         reps = atoi(optarg);
 176                         break;
 177                 case 'f':
 178 #ifdef notyet
 179                         todo |= FORKSTAT;
 180 #else
 181                         errx(EX_USAGE, "sorry, -f is not (re)implemented yet");
 182 #endif
 183                         break;
 184                 case 'i':
 185                         todo |= INTRSTAT;
 186                         break;
 187                 case 'M':
 188                         memf = optarg;
 189                         break;
 190                 case 'm':
 191                         todo |= MEMSTAT;
 192                         break;
 193                 case 'N':
 194                         nlistf = optarg;
 195                         break;
 196                 case 'n':
 197                         nflag = 1;
 198                         maxshowdevs = atoi(optarg);
 199                         if (maxshowdevs < 0)
 200                                 errx(1, "number of devices %d is < 0",
 201                                      maxshowdevs);
 202                         break;
 203                 case 'p':
 204                         if (buildmatch(optarg, &matches, &num_matches) != 0)
 205                                 errx(1, "%s", devstat_errbuf);
 206                         break;
 207                 case 's':
 208                         todo |= SUMSTAT;
 209                         break;
 210                 case 't':
 211 #ifdef notyet
 212                         todo |= TIMESTAT;
 213 #else
 214                         errx(EX_USAGE, "sorry, -t is not (re)implemented yet");
 215 #endif
 216                         break;
 217                 case 'w':
 218                         interval = atoi(optarg);
 219                         break;
 220                 case 'z':
 221                         todo |= ZMEMSTAT;
 222                         break;
 223                 case '?':
 224                 default:
 225                         usage();
 226                 }
 227         }
 228         argc -= optind;
 229         argv += optind;
 230
 231         if (todo == 0)
 232                 todo = VMSTAT;
 233
 234         /*
 235          * Discard setgid privileges if not the running kernel so that bad
 236          * guys can't print interesting stuff from kernel memory.
 237          */
 238         if (nlistf != NULL || memf != NULL)
 239                 setgid(getgid());
 240
 241         kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf);
 242         if (kd == 0)
 243                 errx(1, "kvm_openfiles: %s", errbuf);
 244
 245         if ((c = kvm_nlist(kd, namelist)) != 0) {
 246                 if (c > 0) {
 247                         warnx("undefined symbols:");
 248                         for (c = 0;
 249                             c < sizeof(namelist)/sizeof(namelist[0]); c++)
 250                                 if (namelist[c].n_type == 0)
 251                                         fprintf(stderr, " %s",
 252                                             namelist[c].n_name);
 253                         (void)fputc('\n', stderr);
 254                 } else
 255                         warnx("kvm_nlist: %s", kvm_geterr(kd));
 256                 exit(1);
 257         }
 258
 259         if (todo & VMSTAT) {
 260                 char **getdrivedata();
 261                 struct winsize winsize;
 262
 263                 /*
 264                  * Make sure that the userland devstat version matches the
 265                  * kernel devstat version.  If not, exit and print a
 266                  * message informing the user of his mistake.
 267                  */
 268                 if (checkversion() < 0)
 269                         errx(1, "%s", devstat_errbuf);
 270
 271
 272                 argv = getdrivedata(argv);
 273                 winsize.ws_row = 0;
 274                 (void) ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&winsize);
 275                 if (winsize.ws_row > 0)
 276                         winlines = winsize.ws_row;
 277
 278         }
 279
 280 #define BACKWARD_COMPATIBILITY
 281 #ifdef  BACKWARD_COMPATIBILITY
 282         if (*argv) {
 283                 interval = atoi(*argv);
 284                 if (*++argv)
 285                         reps = atoi(*argv);
 286         }
 287 #endif
 288
 289         if (interval) {
 290                 if (!reps)
 291                         reps = -1;
 292         } else if (reps)
 293                 interval = 1;
 294
 295 #ifdef notyet
 296         if (todo & FORKSTAT)
 297                 doforkst();
 298 #endif
 299         if (todo & MEMSTAT)
 300                 domem();
 301         if (todo & ZMEMSTAT)
 302                 dozmem();
 303         if (todo & SUMSTAT)
 304                 dosum();
 305 #ifdef notyet
 306         if (todo & TIMESTAT)
 307                 dotimes();
 308 #endif
 309         if (todo & INTRSTAT)
 310                 dointr();
 311         if (todo & VMSTAT)
 312                 dovmstat(interval, reps);
 313         exit(0);
 314 }
 315
 316 char **
 317 getdrivedata(argv)
 318         char **argv;
 319 {
 320         if ((num_devices = getnumdevs()) < 0)
 321                 errx(1, "%s", devstat_errbuf);
 322
 323         cur.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
 324         last.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
 325         bzero(cur.dinfo, sizeof(struct devinfo));
 326         bzero(last.dinfo, sizeof(struct devinfo));
 327
 328         if (getdevs(&cur) == -1)
 329                 errx(1, "%s", devstat_errbuf);
 330
 331         num_devices = cur.dinfo->numdevs;
 332         generation = cur.dinfo->generation;
 333
 334         specified_devices = (char **)malloc(sizeof(char *));
 335         for (num_devices_specified = 0; *argv; ++argv) {
 336                 if (isdigit(**argv))
 337                         break;
 338                 num_devices_specified++;
 339                 specified_devices = (char **)realloc(specified_devices,
 340                                                      sizeof(char *) *
 341                                                      num_devices_specified);
 342                 specified_devices[num_devices_specified - 1] = *argv;
 343         }
 344         dev_select = NULL;
 345
 346         if (nflag == 0 && maxshowdevs < num_devices_specified)
 347                         maxshowdevs = num_devices_specified;
 348
 349         /*
 350          * People are generally only interested in disk statistics when
 351          * they're running vmstat.  So, that's what we're going to give
 352          * them if they don't specify anything by default.  We'll also give
 353          * them any other random devices in the system so that we get to
 354          * maxshowdevs devices, if that many devices exist.  If the user
 355          * specifies devices on the command line, either through a pattern
 356          * match or by naming them explicitly, we will give the user only
 357          * those devices.
 358          */
 359         if ((num_devices_specified == 0) && (num_matches == 0)) {
 360                 if (buildmatch("da", &matches, &num_matches) != 0)
 361                         errx(1, "%s", devstat_errbuf);
 362
 363                 select_mode = DS_SELECT_ADD;
 364         } else
 365                 select_mode = DS_SELECT_ONLY;
 366
 367         /*
 368          * At this point, selectdevs will almost surely indicate that the
 369          * device list has changed, so we don't look for return values of 0
 370          * or 1.  If we get back -1, though, there is an error.
 371          */
 372         if (selectdevs(&dev_select, &num_selected, &num_selections,
 373                        &select_generation, generation, cur.dinfo->devices,
 374                        num_devices, matches, num_matches, specified_devices,
 375                        num_devices_specified, select_mode,
 376                        maxshowdevs, 0) == -1)
 377                 errx(1, "%s", devstat_errbuf);
 378
 379         return(argv);
 380 }
 381
 382 long
 383 getuptime()
 384 {
 385         static time_t now, boottime;
 386         time_t uptime;
 387
 388         if (boottime == 0)
 389                 kread(X_BOOTTIME, &boottime, sizeof(boottime));
 390         (void)time(&now);
 391         uptime = now - boottime;
 392         if (uptime <= 0 || uptime > 60*60*24*365*10)
 393                 errx(1, "time makes no sense; namelist must be wrong");
 394         return(uptime);
 395 }
 396
 397 int     hz, hdrcnt;
 398
 399 void
 400 dovmstat(interval, reps)
 401         u_int interval;
 402         int reps;
 403 {
 404         struct vmtotal total;
 405         time_t uptime, halfuptime;
 406         struct devinfo *tmp_dinfo;
 407         void needhdr();
 408         int mib[2];
 409         size_t size;
 410
 411         uptime = getuptime();
 412         halfuptime = uptime / 2;
 413         (void)signal(SIGCONT, needhdr);
 414
 415         if (namelist[X_STATHZ].n_type != 0 && namelist[X_STATHZ].n_value != 0)
 416                 kread(X_STATHZ, &hz, sizeof(hz));
 417         if (!hz)
 418                 kread(X_HZ, &hz, sizeof(hz));
 419
 420         for (hdrcnt = 1;;) {
 421                 if (!--hdrcnt)
 422                         printhdr();
 423                 kread(X_CPTIME, cur.cp_time, sizeof(cur.cp_time));
 424
 425                 tmp_dinfo = last.dinfo;
 426                 last.dinfo = cur.dinfo;
 427                 cur.dinfo = tmp_dinfo;
 428                 last.busy_time = cur.busy_time;
 429
 430                 /*
 431                  * Here what we want to do is refresh our device stats.
 432                  * getdevs() returns 1 when the device list has changed.
 433                  * If the device list has changed, we want to go through
 434                  * the selection process again, in case a device that we
 435                  * were previously displaying has gone away.
 436                  */
 437                 switch (getdevs(&cur)) {
 438                 case -1:
 439                         errx(1, "%s", devstat_errbuf);
 440                         break;
 441                 case 1: {
 442                         int retval;
 443
 444                         num_devices = cur.dinfo->numdevs;
 445                         generation = cur.dinfo->generation;
 446
 447                         retval = selectdevs(&dev_select, &num_selected,
 448                                             &num_selections, &select_generation,
 449                                             generation, cur.dinfo->devices,
 450                                             num_devices, matches, num_matches,
 451                                             specified_devices,
 452                                             num_devices_specified, select_mode,
 453                                             maxshowdevs, 0);
 454                         switch (retval) {
 455                         case -1:
 456                                 errx(1, "%s", devstat_errbuf);
 457                                 break;
 458                         case 1:
 459                                 printhdr();
 460                                 break;
 461                         default:
 462                                 break;
 463                         }
 464                 }
 465                 default:
 466                         break;
 467                 }
 468
 469                 kread(X_SUM, &sum, sizeof(sum));
 470                 size = sizeof(total);
 471                 mib[0] = CTL_VM;
 472                 mib[1] = VM_METER;
 473                 if (sysctl(mib, 2, &total, &size, NULL, 0) < 0) {
 474                         printf("Can't get kerninfo: %s\n", strerror(errno));
 475                         bzero(&total, sizeof(total));
 476                 }
 477                 (void)printf("%2d %1d %1d",
 478                     total.t_rq - 1, total.t_dw + total.t_pw, total.t_sw);
 479 #define vmstat_pgtok(a) ((a) * sum.v_page_size >> 10)
 480 #define rate(x) (((x) + halfuptime) / uptime)   /* round */
 481                 (void)printf(" %7ld %6ld ",
 482                     (long)vmstat_pgtok(total.t_avm), (long)vmstat_pgtok(total.t_free));
 483                 (void)printf("%4lu ",
 484                     (u_long)rate(sum.v_vm_faults - osum.v_vm_faults));
 485                 (void)printf("%3lu ",
 486                     (u_long)rate(sum.v_reactivated - osum.v_reactivated));
 487                 (void)printf("%3lu ",
 488                     (u_long)rate(sum.v_swapin + sum.v_vnodein -
 489                     (osum.v_swapin + osum.v_vnodein)));
 490                 (void)printf("%3lu ",
 491                     (u_long)rate(sum.v_swapout + sum.v_vnodeout -
 492                     (osum.v_swapout + osum.v_vnodeout)));
 493                 (void)printf("%3lu ",
 494                     (u_long)rate(sum.v_tfree - osum.v_tfree));
 495                 (void)printf("%3lu ",
 496                     (u_long)rate(sum.v_pdpages - osum.v_pdpages));
 497                 devstats();
 498                 (void)printf("%4lu %4lu %3lu ",
 499                     (u_long)rate(sum.v_intr - osum.v_intr),
 500                     (u_long)rate(sum.v_syscall - osum.v_syscall),
 501                     (u_long)rate(sum.v_swtch - osum.v_swtch));
 502                 cpustats();
 503                 (void)printf("\n");
 504                 (void)fflush(stdout);
 505                 if (reps >= 0 && --reps <= 0)
 506                         break;
 507                 osum = sum;
 508                 uptime = interval;
 509                 /*
 510                  * We round upward to avoid losing low-frequency events
 511                  * (i.e., >= 1 per interval but < 1 per second).
 512                  */
 513                 if (interval != 1)
 514                         halfuptime = (uptime + 1) / 2;
 515                 else
 516                         halfuptime = 0;
 517                 (void)sleep(interval);
 518         }
 519 }
 520
 521 void
 522 printhdr()
 523 {
 524         int i, num_shown;
 525
 526         num_shown = (num_selected < maxshowdevs) ? num_selected : maxshowdevs;
 527         (void)printf(" procs      memory      page%*s", 19, "");
 528         if (num_shown > 1)
 529                 (void)printf(" disks %*s", num_shown * 4 - 7, "");
 530         else if (num_shown == 1)
 531                 (void)printf("disk");
 532         (void)printf("   faults      cpu\n");
 533         (void)printf(" r b w     avm    fre  flt  re  pi  po  fr  sr ");
 534         for (i = 0; i < num_devices; i++)
 535                 if ((dev_select[i].selected)
 536                  && (dev_select[i].selected <= maxshowdevs))
 537                         (void)printf("%c%c%d ", dev_select[i].device_name[0],
 538                                      dev_select[i].device_name[1],
 539                                      dev_select[i].unit_number);
 540         (void)printf("  in   sy  cs us sy id\n");
 541         hdrcnt = winlines - 2;
 542 }
 543
 544 /*
 545  * Force a header to be prepended to the next output.
 546  */
 547 void
 548 needhdr()
 549 {
 550
 551         hdrcnt = 1;
 552 }
 553
 554 #ifdef notyet
 555 void
 556 dotimes()
 557 {
 558         u_int pgintime, rectime;
 559
 560         kread(X_REC, &rectime, sizeof(rectime));
 561         kread(X_PGIN, &pgintime, sizeof(pgintime));
 562         kread(X_SUM, &sum, sizeof(sum));
 563         (void)printf("%u reclaims, %u total time (usec)\n",
 564             sum.v_pgrec, rectime);
 565         (void)printf("average: %u usec / reclaim\n", rectime / sum.v_pgrec);
 566         (void)printf("\n");
 567         (void)printf("%u page ins, %u total time (msec)\n",
 568             sum.v_pgin, pgintime / 10);
 569         (void)printf("average: %8.1f msec / page in\n",
 570             pgintime / (sum.v_pgin * 10.0));
 571 }
 572 #endif
 573
 574 long
 575 pct(top, bot)
 576         long top, bot;
 577 {
 578         long ans;
 579
 580         if (bot == 0)
 581                 return(0);
 582         ans = (quad_t)top * 100 / bot;
 583         return (ans);
 584 }
 585
 586 #define PCT(top, bot) pct((long)(top), (long)(bot))
 587
 588 void
 589 dosum()
 590 {
 591         struct nchstats nchstats;
 592         long nchtotal;
 593
 594         kread(X_SUM, &sum, sizeof(sum));
 595         (void)printf("%9u cpu context switches\n", sum.v_swtch);
 596         (void)printf("%9u device interrupts\n", sum.v_intr);
 597         (void)printf("%9u software interrupts\n", sum.v_soft);
 598         (void)printf("%9u traps\n", sum.v_trap);
 599         (void)printf("%9u system calls\n", sum.v_syscall);
 600         (void)printf("%9u kernel threads created\n", sum.v_kthreads);
 601         (void)printf("%9u  fork() calls\n", sum.v_forks);
 602         (void)printf("%9u vfork() calls\n", sum.v_vforks);
 603         (void)printf("%9u rfork() calls\n", sum.v_rforks);
 604         (void)printf("%9u swap pager pageins\n", sum.v_swapin);
 605         (void)printf("%9u swap pager pages paged in\n", sum.v_swappgsin);
 606         (void)printf("%9u swap pager pageouts\n", sum.v_swapout);
 607         (void)printf("%9u swap pager pages paged out\n", sum.v_swappgsout);
 608         (void)printf("%9u vnode pager pageins\n", sum.v_vnodein);
 609         (void)printf("%9u vnode pager pages paged in\n", sum.v_vnodepgsin);
 610         (void)printf("%9u vnode pager pageouts\n", sum.v_vnodeout);
 611         (void)printf("%9u vnode pager pages paged out\n", sum.v_vnodepgsout);
 612         (void)printf("%9u page daemon wakeups\n", sum.v_pdwakeups);
 613         (void)printf("%9u pages examined by the page daemon\n", sum.v_pdpages);
 614         (void)printf("%9u pages reactivated\n", sum.v_reactivated);
 615         (void)printf("%9u copy-on-write faults\n", sum.v_cow_faults);
 616         (void)printf("%9u copy-on-write optimized faults\n", sum.v_cow_optim);
 617         (void)printf("%9u zero fill pages zeroed\n", sum.v_zfod);
 618         (void)printf("%9u zero fill pages prezeroed\n", sum.v_ozfod);
 619         (void)printf("%9u intransit blocking page faults\n", sum.v_intrans);
 620         (void)printf("%9u total VM faults taken\n", sum.v_vm_faults);
 621         (void)printf("%9u pages affected by kernel thread creation\n", sum.v_kthreadpages);
 622         (void)printf("%9u pages affected by  fork()\n", sum.v_forkpages);
 623         (void)printf("%9u pages affected by vfork()\n", sum.v_vforkpages);
 624         (void)printf("%9u pages affected by rfork()\n", sum.v_rforkpages);
 625         (void)printf("%9u pages freed\n", sum.v_tfree);
 626         (void)printf("%9u pages freed by daemon\n", sum.v_dfree);
 627         (void)printf("%9u pages freed by exiting processes\n", sum.v_pfree);
 628         (void)printf("%9u pages active\n", sum.v_active_count);
 629         (void)printf("%9u pages inactive\n", sum.v_inactive_count);
 630         (void)printf("%9u pages in VM cache\n", sum.v_cache_count);
 631         (void)printf("%9u pages wired down\n", sum.v_wire_count);
 632         (void)printf("%9u pages free\n", sum.v_free_count);
 633         (void)printf("%9u bytes per page\n", sum.v_page_size);
 634         kread(X_NCHSTATS, &nchstats, sizeof(nchstats));
 635         nchtotal = nchstats.ncs_goodhits + nchstats.ncs_neghits +
 636             nchstats.ncs_badhits + nchstats.ncs_falsehits +
 637             nchstats.ncs_miss + nchstats.ncs_long;
 638         (void)printf("%9ld total name lookups\n", nchtotal);
 639         (void)printf(
 640             "%9s cache hits (%ld%% pos + %ld%% neg) system %ld%% per-directory\n",
 641             "", PCT(nchstats.ncs_goodhits, nchtotal),
 642             PCT(nchstats.ncs_neghits, nchtotal),
 643             PCT(nchstats.ncs_pass2, nchtotal));
 644         (void)printf("%9s deletions %ld%%, falsehits %ld%%, toolong %ld%%\n", "",
 645             PCT(nchstats.ncs_badhits, nchtotal),
 646             PCT(nchstats.ncs_falsehits, nchtotal),
 647             PCT(nchstats.ncs_long, nchtotal));
 648 }
 649
 650 #ifdef notyet
 651 void
 652 doforkst()
 653 {
 654         struct forkstat fks;
 655
 656         kread(X_FORKSTAT, &fks, sizeof(struct forkstat));
 657         (void)printf("%d forks, %d pages, average %.2f\n",
 658             fks.cntfork, fks.sizfork, (double)fks.sizfork / fks.cntfork);
 659         (void)printf("%d vforks, %d pages, average %.2f\n",
 660             fks.cntvfork, fks.sizvfork, (double)fks.sizvfork / fks.cntvfork);
 661 }
 662 #endif
 663
 664 static void
 665 devstats()
 666 {
 667         register int dn, state;
 668         long double transfers_per_second;
 669         long double busy_seconds;
 670         long tmp;
 671
 672         for (state = 0; state < CPUSTATES; ++state) {
 673                 tmp = cur.cp_time[state];
 674                 cur.cp_time[state] -= last.cp_time[state];
 675                 last.cp_time[state] = tmp;
 676         }
 677
 678         busy_seconds = compute_etime(cur.busy_time, last.busy_time);
 679
 680         for (dn = 0; dn < num_devices; dn++) {
 681                 int di;
 682
 683                 if ((dev_select[dn].selected == 0)
 684                  || (dev_select[dn].selected > maxshowdevs))
 685                         continue;
 686
 687                 di = dev_select[dn].position;
 688
 689                 if (compute_stats(&cur.dinfo->devices[di],
 690                                   &last.dinfo->devices[di], busy_seconds,
 691                                   NULL, NULL, NULL,
 692                                   NULL, &transfers_per_second, NULL,
 693                                   NULL, NULL) != 0)
 694                         errx(1, "%s", devstat_errbuf);
 695
 696                 printf("%3.0Lf ", transfers_per_second);
 697         }
 698 }
 699
 700 void
 701 cpustats()
 702 {
 703         register int state;
 704         double pct, total;
 705
 706         total = 0;
 707         for (state = 0; state < CPUSTATES; ++state)
 708                 total += cur.cp_time[state];
 709         if (total)
 710                 pct = 100 / total;
 711         else
 712                 pct = 0;
 713         (void)printf("%2.0f ", (cur.cp_time[CP_USER] +
 714                                 cur.cp_time[CP_NICE]) * pct);
 715         (void)printf("%2.0f ", (cur.cp_time[CP_SYS] +
 716                                 cur.cp_time[CP_INTR]) * pct);
 717         (void)printf("%2.0f", cur.cp_time[CP_IDLE] * pct);
 718 }
 719
 720 void
 721 dointr()
 722 {
 723         register u_long *intrcnt, uptime;
 724         register u_int64_t inttotal;
 725         register int nintr, inamlen;
 726         register char *intrname;
 727
 728         uptime = getuptime();
 729         nintr = namelist[X_EINTRCNT].n_value - namelist[X_INTRCNT].n_value;
 730         inamlen =
 731             namelist[X_EINTRNAMES].n_value - namelist[X_INTRNAMES].n_value;
 732         intrcnt = malloc((size_t)nintr);
 733         intrname = malloc((size_t)inamlen);
 734         if (intrcnt == NULL || intrname == NULL)
 735                 errx(1, "malloc");
 736         kread(X_INTRCNT, intrcnt, (size_t)nintr);
 737         kread(X_INTRNAMES, intrname, (size_t)inamlen);
 738         (void)printf("interrupt                   total       rate\n");
 739         inttotal = 0;
 740         nintr /= sizeof(long);
 741         while (--nintr >= 0) {
 742                 if (*intrcnt)
 743                         (void)printf("%-12s %20lu %10lu\n", intrname,
 744                             *intrcnt, *intrcnt / uptime);
 745                 intrname += strlen(intrname) + 1;
 746                 inttotal += *intrcnt++;
 747         }
 748         (void)printf("Total        %20llu %10llu\n", inttotal,
 749                         inttotal / (u_int64_t) uptime);
 750 }
 751
 752 #define MAX_KMSTATS     200
 753
 754 void
 755 domem()
 756 {
 757         register struct kmembuckets *kp;
 758         register struct malloc_type *ks;
 759         register int i, j;
 760         int len, size, first, nkms;
 761         long totuse = 0, totfree = 0, totreq = 0;
 762         const char *name;
 763         struct malloc_type kmemstats[MAX_KMSTATS], *kmsp;
 764         char buf[1024];
 765         struct kmembuckets buckets[MINBUCKET + 16];
 766
 767         kread(X_KMEMBUCKETS, buckets, sizeof(buckets));
 768         kread(X_KMEMSTATISTICS, &kmsp, sizeof(kmsp));
 769         for (nkms = 0; nkms < MAX_KMSTATS && kmsp != NULL; nkms++) {
 770                 if (sizeof(kmemstats[0]) != kvm_read(kd, (u_long)kmsp,
 771                     &kmemstats[nkms], sizeof(kmemstats[0])))
 772                         err(1, "kvm_read(%p)", (void *)kmsp);
 773                 if (sizeof(buf) !=  kvm_read(kd,
 774                     (u_long)kmemstats[nkms].ks_shortdesc, buf, sizeof(buf)))
 775                         err(1, "kvm_read(%p)",
 776                             (void *)kmemstats[nkms].ks_shortdesc);
 777                 buf[sizeof(buf) - 1] = '\0';
 778                 kmemstats[nkms].ks_shortdesc = strdup(buf);
 779                 kmsp = kmemstats[nkms].ks_next;
 780         }
 781         if (kmsp != NULL)
 782                 warnx("truncated to the first %d memory types", nkms);
 783         (void)printf("Memory statistics by bucket size\n");
 784         (void)printf(
 785             "Size   In Use   Free   Requests  HighWater  Couldfree\n");
 786         for (i = MINBUCKET, kp = &buckets[i]; i < MINBUCKET + 16; i++, kp++) {
 787                 if (kp->kb_calls == 0)
 788                         continue;
 789                 size = 1 << i;
 790                 if(size < 1024)
 791                         (void)printf("%4d",size);
 792                 else
 793                         (void)printf("%3dK",size>>10);
 794                 (void)printf(" %8ld %6ld %10lld %7ld %10ld\n",
 795                         kp->kb_total - kp->kb_totalfree,
 796                         kp->kb_totalfree, kp->kb_calls,
 797                         kp->kb_highwat, kp->kb_couldfree);
 798                 totfree += size * kp->kb_totalfree;
 799         }
 800
 801         (void)printf("\nMemory usage type by bucket size\n");
 802         (void)printf("Size  Type(s)\n");
 803         kp = &buckets[MINBUCKET];
 804         for (j =  1 << MINBUCKET; j < 1 << (MINBUCKET + 16); j <<= 1, kp++) {
 805                 if (kp->kb_calls == 0)
 806                         continue;
 807                 first = 1;
 808                 len = 8;
 809                 for (i = 0, ks = &kmemstats[0]; i < nkms; i++, ks++) {
 810                         if (ks->ks_calls == 0)
 811                                 continue;
 812                         if ((ks->ks_size & j) == 0)
 813                                 continue;
 814                         name = ks->ks_shortdesc;
 815                         len += 2 + strlen(name);
 816                         if (first && j < 1024)
 817                                 printf("%4d  %s", j, name);
 818                         else if (first)
 819                                 printf("%3dK  %s", j>>10, name);
 820                         else
 821                                 printf(",");
 822                         if (len >= 79) {
 823                                 printf("\n\t ");
 824                                 len = 10 + strlen(name);
 825                         }
 826                         if (!first)
 827                                 printf(" %s", name);
 828                         first = 0;
 829                 }
 830                 printf("\n");
 831         }
 832
 833         (void)printf(
 834             "\nMemory statistics by type                          Type  Kern\n");
 835         (void)printf(
 836 "        Type  InUse MemUse HighUse  Limit Requests Limit Limit Size(s)\n");
 837         for (i = 0, ks = &kmemstats[0]; i < nkms; i++, ks++) {
 838                 if (ks->ks_calls == 0)
 839                         continue;
 840                 (void)printf("%13s%6ld%6ldK%7ldK%6ldK%9lld%5u%6u",
 841                     ks->ks_shortdesc,
 842                     ks->ks_inuse, (ks->ks_memuse + 1023) / 1024,
 843                     (ks->ks_maxused + 1023) / 1024,
 844                     (ks->ks_limit + 1023) / 1024, ks->ks_calls,
 845                     ks->ks_limblocks, ks->ks_mapblocks);
 846                 first = 1;
 847                 for (j =  1 << MINBUCKET; j < 1 << (MINBUCKET + 16); j <<= 1) {
 848                         if ((ks->ks_size & j) == 0)
 849                                 continue;
 850                         if (first)
 851                                 printf("  ");
 852                         else
 853                                 printf(",");
 854                         if(j<1024)
 855                                 printf("%d",j);
 856                         else
 857                                 printf("%dK",j>>10);
 858                         first = 0;
 859                 }
 860                 printf("\n");
 861                 totuse += ks->ks_memuse;
 862                 totreq += ks->ks_calls;
 863         }
 864         (void)printf("\nMemory Totals:  In Use    Free    Requests\n");
 865         (void)printf("              %7ldK %6ldK    %8ld\n",
 866              (totuse + 1023) / 1024, (totfree + 1023) / 1024, totreq);
 867 }
 868
 869 void
 870 dozmem()
 871 {
 872         char *buf;
 873         size_t bufsize;
 874
 875         buf = NULL;
 876         bufsize = 1024;
 877         for (;;) {
 878                 if ((buf = realloc(buf, bufsize)) == NULL)
 879                         err(1, "realloc()");
 880                 if (sysctlbyname("vm.zone", buf, &bufsize, 0, NULL) == 0)
 881                         break;
 882                 if (errno != ENOMEM)
 883                         err(1, "sysctl()");
 884                 bufsize *= 2;
 885         }
 886         buf[bufsize] = '\0'; /* play it safe */
 887         (void)printf("%s\n\n", buf);
 888         free(buf);
 889 }
 890
 891 /*
 892  * kread reads something from the kernel, given its nlist index.
 893  */
 894 void
 895 kread(nlx, addr, size)
 896         int nlx;
 897         void *addr;
 898         size_t size;
 899 {
 900         char *sym;
 901
 902         if (namelist[nlx].n_type == 0 || namelist[nlx].n_value == 0) {
 903                 sym = namelist[nlx].n_name;
 904                 if (*sym == '_')
 905                         ++sym;
 906                 errx(1, "symbol %s not defined", sym);
 907         }
 908         if (kvm_read(kd, namelist[nlx].n_value, addr, size) != size) {
 909                 sym = namelist[nlx].n_name;
 910                 if (*sym == '_')
 911                         ++sym;
 912                 errx(1, "%s: %s", sym, kvm_geterr(kd));
 913         }
 914 }
 915
 916 void
 917 usage()
 918 {
 919         (void)fprintf(stderr, "%s%s",
 920                 "usage: vmstat [-imsz] [-c count] [-M core] [-N system] [-w wait]\n",
 921                 "              [-n devs] [disks]\n");
 922         exit(1);
 923 }