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  * @(#) Copyright (c) 1980, 1986, 1991, 1993 The Regents of the University of California.  All rights reserved.
  34  * @(#)vmstat.c 8.1 (Berkeley) 6/6/93
  35  * $FreeBSD: src/usr.bin/vmstat/vmstat.c,v 1.38.2.4 2001/07/31 19:52:41 tmm Exp $
  36  * $DragonFly: src/usr.bin/vmstat/vmstat.c,v 1.7 2003/10/04 20:36:54 hmp Exp $
  37  */
  38
  39 #define _KERNEL_STRUCTURES
  40 #include <sys/param.h>
  41 #include <sys/time.h>
  42 #include <sys/proc.h>
  43 #include <sys/dkstat.h>
  44 #include <sys/uio.h>
  45 #include <sys/namei.h>
  46 #include <sys/malloc.h>
  47 #include <sys/signal.h>
  48 #include <sys/fcntl.h>
  49 #include <sys/ioctl.h>
  50 #include <sys/sysctl.h>
  51 #include <sys/vmmeter.h>
  52
  53 #include <vm/vm_param.h>
  54
  55 #include <ctype.h>
  56 #include <err.h>
  57 #include <errno.h>
  58 #include <kvm.h>
  59 #include <limits.h>
  60 #include <nlist.h>
  61 #include <paths.h>
  62 #include <stdio.h>
  63 #include <stdlib.h>
  64 #include <string.h>
  65 #include <sysexits.h>
  66 #include <time.h>
  67 #include <unistd.h>
  68 #include <devstat.h>
  69
  70 static struct nlist namelist[] = {
  71 #define X_CPTIME        0
  72         { "_cp_time" },
  73 #define X_BOOTTIME      1
  74         { "_boottime" },
  75 #define X_HZ            2
  76         { "_hz" },
  77 #define X_STATHZ        3
  78         { "_stathz" },
  79 #define X_NCHSTATS      4
  80         { "_nchstats" },
  81 #define X_INTRNAMES     5
  82         { "_intrnames" },
  83 #define X_EINTRNAMES    6
  84         { "_eintrnames" },
  85 #define X_INTRCNT       7
  86         { "_intrcnt" },
  87 #define X_EINTRCNT      8
  88         { "_eintrcnt" },
  89 #define X_KMEMSTATISTICS        9
  90         { "_kmemstatistics" },
  91 #if 0
  92 #define X_KMEMBUCKETS   10
  93         { "_bucket" },
  94 #else
  95         { "_kmemstatistics" },
  96 #endif
  97 #define X_ZLIST         11
  98         { "_zlist" },
  99 #ifdef notyet
 100 #define X_DEFICIT       12
 101         { "_deficit" },
 102 #define X_FORKSTAT      13
 103         { "_forkstat" },
 104 #define X_REC           14
 105         { "_rectime" },
 106 #define X_PGIN          15
 107         { "_pgintime" },
 108 #define X_XSTATS        16
 109         { "_xstats" },
 110 #define X_END           17
 111 #else
 112 #define X_END           12
 113 #endif
 114         { "" },
 115 };
 116
 117 struct statinfo cur, last;
 118 int num_devices, maxshowdevs;
 119 long generation;
 120 struct device_selection *dev_select;
 121 int num_selected;
 122 struct devstat_match *matches;
 123 int num_matches = 0;
 124 int num_devices_specified, num_selections;
 125 long select_generation;
 126 char **specified_devices;
 127 devstat_select_mode select_mode;
 128
 129 struct  vmmeter vmm, ovmm;
 130 struct  vmstats vms, ovms;
 131
 132 int     winlines = 20;
 133 int     nflag = 0;
 134
 135 kvm_t *kd;
 136
 137 #define FORKSTAT        0x01
 138 #define INTRSTAT        0x02
 139 #define MEMSTAT         0x04
 140 #define SUMSTAT         0x08
 141 #define TIMESTAT        0x10
 142 #define VMSTAT          0x20
 143 #define ZMEMSTAT        0x40
 144
 145 void    cpustats(), dointr(), domem(), dosum(), dozmem();
 146 void    dovmstat(), kread(), usage();
 147 #ifdef notyet
 148 void    dotimes(), doforkst();
 149 #endif
 150 void printhdr(void);
 151 static void devstats();
 152
 153 int
 154 main(register int argc, register char **argv)
 155 {
 156         register int c, todo;
 157         u_int interval;
 158         int reps;
 159         char *memf, *nlistf;
 160         char errbuf[_POSIX2_LINE_MAX];
 161
 162         memf = nlistf = NULL;
 163         interval = reps = todo = 0;
 164         maxshowdevs = 2;
 165         while ((c = getopt(argc, argv, "c:fiM:mN:n:p:stw:z")) != -1) {
 166                 switch (c) {
 167                 case 'c':
 168                         reps = atoi(optarg);
 169                         break;
 170                 case 'f':
 171 #ifdef notyet
 172                         todo |= FORKSTAT;
 173 #else
 174                         errx(EX_USAGE, "sorry, -f is not (re)implemented yet");
 175 #endif
 176                         break;
 177                 case 'i':
 178                         todo |= INTRSTAT;
 179                         break;
 180                 case 'M':
 181                         memf = optarg;
 182                         break;
 183                 case 'm':
 184                         todo |= MEMSTAT;
 185                         break;
 186                 case 'N':
 187                         nlistf = optarg;
 188                         break;
 189                 case 'n':
 190                         nflag = 1;
 191                         maxshowdevs = atoi(optarg);
 192                         if (maxshowdevs < 0)
 193                                 errx(1, "number of devices %d is < 0",
 194                                      maxshowdevs);
 195                         break;
 196                 case 'p':
 197                         if (buildmatch(optarg, &matches, &num_matches) != 0)
 198                                 errx(1, "%s", devstat_errbuf);
 199                         break;
 200                 case 's':
 201                         todo |= SUMSTAT;
 202                         break;
 203                 case 't':
 204 #ifdef notyet
 205                         todo |= TIMESTAT;
 206 #else
 207                         errx(EX_USAGE, "sorry, -t is not (re)implemented yet");
 208 #endif
 209                         break;
 210                 case 'w':
 211                         interval = atoi(optarg);
 212                         break;
 213                 case 'z':
 214                         todo |= ZMEMSTAT;
 215                         break;
 216                 case '?':
 217                 default:
 218                         usage();
 219                 }
 220         }
 221         argc -= optind;
 222         argv += optind;
 223
 224         if (todo == 0)
 225                 todo = VMSTAT;
 226
 227         /*
 228          * Discard setgid privileges if not the running kernel so that bad
 229          * guys can't print interesting stuff from kernel memory.
 230          */
 231         if (nlistf != NULL || memf != NULL)
 232                 setgid(getgid());
 233
 234         kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf);
 235         if (kd == 0)
 236                 errx(1, "kvm_openfiles: %s", errbuf);
 237
 238         if ((c = kvm_nlist(kd, namelist)) != 0) {
 239                 if (c > 0) {
 240                         warnx("undefined symbols:");
 241                         for (c = 0;
 242                             c < sizeof(namelist)/sizeof(namelist[0]); c++)
 243                                 if (namelist[c].n_type == 0)
 244                                         fprintf(stderr, " %s",
 245                                             namelist[c].n_name);
 246                         (void)fputc('\n', stderr);
 247                 } else
 248                         warnx("kvm_nlist: %s", kvm_geterr(kd));
 249                 exit(1);
 250         }
 251
 252         if (todo & VMSTAT) {
 253                 char **getdrivedata();
 254                 struct winsize winsize;
 255
 256                 /*
 257                  * Make sure that the userland devstat version matches the
 258                  * kernel devstat version.  If not, exit and print a
 259                  * message informing the user of his mistake.
 260                  */
 261                 if (checkversion() < 0)
 262                         errx(1, "%s", devstat_errbuf);
 263
 264
 265                 argv = getdrivedata(argv);
 266                 winsize.ws_row = 0;
 267                 (void) ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&winsize);
 268                 if (winsize.ws_row > 0)
 269                         winlines = winsize.ws_row;
 270
 271         }
 272
 273 #define BACKWARD_COMPATIBILITY
 274 #ifdef  BACKWARD_COMPATIBILITY
 275         if (*argv) {
 276                 interval = atoi(*argv);
 277                 if (*++argv)
 278                         reps = atoi(*argv);
 279         }
 280 #endif
 281
 282         if (interval) {
 283                 if (!reps)
 284                         reps = -1;
 285         } else if (reps)
 286                 interval = 1;
 287
 288 #ifdef notyet
 289         if (todo & FORKSTAT)
 290                 doforkst();
 291 #endif
 292         if (todo & MEMSTAT)
 293                 domem();
 294         if (todo & ZMEMSTAT)
 295                 dozmem();
 296         if (todo & SUMSTAT)
 297                 dosum();
 298 #ifdef notyet
 299         if (todo & TIMESTAT)
 300                 dotimes();
 301 #endif
 302         if (todo & INTRSTAT)
 303                 dointr();
 304         if (todo & VMSTAT)
 305                 dovmstat(interval, reps);
 306         exit(0);
 307 }
 308
 309 char **
 310 getdrivedata(char **argv)
 311 {
 312         if ((num_devices = getnumdevs()) < 0)
 313                 errx(1, "%s", devstat_errbuf);
 314
 315         cur.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
 316         last.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
 317         bzero(cur.dinfo, sizeof(struct devinfo));
 318         bzero(last.dinfo, sizeof(struct devinfo));
 319
 320         if (getdevs(&cur) == -1)
 321                 errx(1, "%s", devstat_errbuf);
 322
 323         num_devices = cur.dinfo->numdevs;
 324         generation = cur.dinfo->generation;
 325
 326         specified_devices = (char **)malloc(sizeof(char *));
 327         for (num_devices_specified = 0; *argv; ++argv) {
 328                 if (isdigit(**argv))
 329                         break;
 330                 num_devices_specified++;
 331                 specified_devices = (char **)realloc(specified_devices,
 332                                                      sizeof(char *) *
 333                                                      num_devices_specified);
 334                 specified_devices[num_devices_specified - 1] = *argv;
 335         }
 336         dev_select = NULL;
 337
 338         if (nflag == 0 && maxshowdevs < num_devices_specified)
 339                         maxshowdevs = num_devices_specified;
 340
 341         /*
 342          * People are generally only interested in disk statistics when
 343          * they're running vmstat.  So, that's what we're going to give
 344          * them if they don't specify anything by default.  We'll also give
 345          * them any other random devices in the system so that we get to
 346          * maxshowdevs devices, if that many devices exist.  If the user
 347          * specifies devices on the command line, either through a pattern
 348          * match or by naming them explicitly, we will give the user only
 349          * those devices.
 350          */
 351         if ((num_devices_specified == 0) && (num_matches == 0)) {
 352                 if (buildmatch("da", &matches, &num_matches) != 0)
 353                         errx(1, "%s", devstat_errbuf);
 354
 355                 select_mode = DS_SELECT_ADD;
 356         } else
 357                 select_mode = DS_SELECT_ONLY;
 358
 359         /*
 360          * At this point, selectdevs will almost surely indicate that the
 361          * device list has changed, so we don't look for return values of 0
 362          * or 1.  If we get back -1, though, there is an error.
 363          */
 364         if (selectdevs(&dev_select, &num_selected, &num_selections,
 365                        &select_generation, generation, cur.dinfo->devices,
 366                        num_devices, matches, num_matches, specified_devices,
 367                        num_devices_specified, select_mode,
 368                        maxshowdevs, 0) == -1)
 369                 errx(1, "%s", devstat_errbuf);
 370
 371         return(argv);
 372 }
 373
 374 long
 375 getuptime(void)
 376 {
 377         static time_t now, boottime;
 378         time_t uptime;
 379
 380         if (boottime == 0)
 381                 kread(X_BOOTTIME, &boottime, sizeof(boottime));
 382         (void)time(&now);
 383         uptime = now - boottime;
 384         if (uptime <= 0 || uptime > 60*60*24*365*10)
 385                 errx(1, "time makes no sense; namelist must be wrong");
 386         return(uptime);
 387 }
 388
 389 int     hz, hdrcnt;
 390
 391 void
 392 dovmstat(u_int interval, int reps)
 393 {
 394         struct vmtotal total;
 395         time_t uptime, halfuptime;
 396         struct devinfo *tmp_dinfo;
 397         void needhdr();
 398         int mib[2];
 399         size_t size;
 400         int vmm_size = sizeof(vmm);
 401         int vms_size = sizeof(vms);
 402         int vmt_size = sizeof(total);
 403
 404         uptime = getuptime();
 405         halfuptime = uptime / 2;
 406         (void)signal(SIGCONT, needhdr);
 407
 408         if (namelist[X_STATHZ].n_type != 0 && namelist[X_STATHZ].n_value != 0)
 409                 kread(X_STATHZ, &hz, sizeof(hz));
 410         if (!hz)
 411                 kread(X_HZ, &hz, sizeof(hz));
 412
 413         for (hdrcnt = 1;;) {
 414                 if (!--hdrcnt)
 415                         printhdr();
 416                 kread(X_CPTIME, cur.cp_time, sizeof(cur.cp_time));
 417
 418                 tmp_dinfo = last.dinfo;
 419                 last.dinfo = cur.dinfo;
 420                 cur.dinfo = tmp_dinfo;
 421                 last.busy_time = cur.busy_time;
 422
 423                 /*
 424                  * Here what we want to do is refresh our device stats.
 425                  * getdevs() returns 1 when the device list has changed.
 426                  * If the device list has changed, we want to go through
 427                  * the selection process again, in case a device that we
 428                  * were previously displaying has gone away.
 429                  */
 430                 switch (getdevs(&cur)) {
 431                 case -1:
 432                         errx(1, "%s", devstat_errbuf);
 433                         break;
 434                 case 1: {
 435                         int retval;
 436
 437                         num_devices = cur.dinfo->numdevs;
 438                         generation = cur.dinfo->generation;
 439
 440                         retval = selectdevs(&dev_select, &num_selected,
 441                                             &num_selections, &select_generation,
 442                                             generation, cur.dinfo->devices,
 443                                             num_devices, matches, num_matches,
 444                                             specified_devices,
 445                                             num_devices_specified, select_mode,
 446                                             maxshowdevs, 0);
 447                         switch (retval) {
 448                         case -1:
 449                                 errx(1, "%s", devstat_errbuf);
 450                                 break;
 451                         case 1:
 452                                 printhdr();
 453                                 break;
 454                         default:
 455                                 break;
 456                         }
 457                 }
 458                 default:
 459                         break;
 460                 }
 461
 462                 if (sysctlbyname("vm.vmstats", &vms, &vms_size, NULL, 0)) {
 463                         perror("sysctlbyname: vm.vmstats");
 464                         exit(1);
 465                 }
 466                 if (sysctlbyname("vm.vmmeter", &vmm, &vmm_size, NULL, 0)) {
 467                         perror("sysctlbyname: vm.vmmeter");
 468                         exit(1);
 469                 }
 470                 if (sysctlbyname("vm.vmtotal", &total, &vmt_size, NULL, 0)) {
 471                         perror("sysctlbyname: vm.vmtotal");
 472                         exit(1);
 473                 }
 474                 (void)printf("%2d %1d %1d",
 475                     total.t_rq - 1, total.t_dw + total.t_pw, total.t_sw);
 476 #define vmstat_pgtok(a) ((a) * vms.v_page_size >> 10)
 477 #define rate(x) (((x) + halfuptime) / uptime)   /* round */
 478                 (void)printf(" %7ld %6ld ",
 479                     (long)vmstat_pgtok(total.t_avm), (long)vmstat_pgtok(total.t_free));
 480                 (void)printf("%4lu ",
 481                     (u_long)rate(vmm.v_vm_faults - ovmm.v_vm_faults));
 482                 (void)printf("%3lu ",
 483                     (u_long)rate(vmm.v_reactivated - ovmm.v_reactivated));
 484                 (void)printf("%3lu ",
 485                     (u_long)rate(vmm.v_swapin + vmm.v_vnodein -
 486                     (ovmm.v_swapin + ovmm.v_vnodein)));
 487                 (void)printf("%3lu ",
 488                     (u_long)rate(vmm.v_swapout + vmm.v_vnodeout -
 489                     (ovmm.v_swapout + ovmm.v_vnodeout)));
 490                 (void)printf("%3lu ",
 491                     (u_long)rate(vmm.v_tfree - ovmm.v_tfree));
 492                 (void)printf("%3lu ",
 493                     (u_long)rate(vmm.v_pdpages - ovmm.v_pdpages));
 494                 devstats();
 495                 (void)printf("%4lu %4lu %3lu ",
 496                     (u_long)rate(vmm.v_intr - ovmm.v_intr),
 497                     (u_long)rate(vmm.v_syscall - ovmm.v_syscall),
 498                     (u_long)rate(vmm.v_swtch - ovmm.v_swtch));
 499                 cpustats();
 500                 (void)printf("\n");
 501                 (void)fflush(stdout);
 502                 if (reps >= 0 && --reps <= 0)
 503                         break;
 504                 ovmm = vmm;
 505                 uptime = interval;
 506                 /*
 507                  * We round upward to avoid losing low-frequency events
 508                  * (i.e., >= 1 per interval but < 1 per second).
 509                  */
 510                 if (interval != 1)
 511                         halfuptime = (uptime + 1) / 2;
 512                 else
 513                         halfuptime = 0;
 514                 (void)sleep(interval);
 515         }
 516 }
 517
 518 void
 519 printhdr(void)
 520 {
 521         int i, num_shown;
 522
 523         num_shown = (num_selected < maxshowdevs) ? num_selected : maxshowdevs;
 524         (void)printf(" procs      memory      page%*s", 19, "");
 525         if (num_shown > 1)
 526                 (void)printf(" disks %*s", num_shown * 4 - 7, "");
 527         else if (num_shown == 1)
 528                 (void)printf("disk");
 529         (void)printf("   faults      cpu\n");
 530         (void)printf(" r b w     avm    fre  flt  re  pi  po  fr  sr ");
 531         for (i = 0; i < num_devices; i++)
 532                 if ((dev_select[i].selected)
 533                  && (dev_select[i].selected <= maxshowdevs))
 534                         (void)printf("%c%c%d ", dev_select[i].device_name[0],
 535                                      dev_select[i].device_name[1],
 536                                      dev_select[i].unit_number);
 537         (void)printf("  in   sy  cs us sy id\n");
 538         hdrcnt = winlines - 2;
 539 }
 540
 541 /*
 542  * Force a header to be prepended to the next output.
 543  */
 544 void
 545 needhdr(void)
 546 {
 547
 548         hdrcnt = 1;
 549 }
 550
 551 long
 552 pct(long top, long bot)
 553 {
 554         long ans;
 555
 556         if (bot == 0)
 557                 return(0);
 558         ans = (quad_t)top * 100 / bot;
 559         return (ans);
 560 }
 561
 562 #define PCT(top, bot) pct((long)(top), (long)(bot))
 563
 564 void
 565 dosum(void)
 566 {
 567         struct nchstats nchstats;
 568         long nchtotal;
 569         int vms_size = sizeof(vms);
 570         int vmm_size = sizeof(vmm);
 571
 572         if (sysctlbyname("vm.vmstats", &vms, &vms_size, NULL, 0)) {
 573                 perror("sysctlbyname: vm.vmstats");
 574                 exit(1);
 575         }
 576         if (sysctlbyname("vm.vmmeter", &vmm, &vmm_size, NULL, 0)) {
 577                 perror("sysctlbyname: vm.vmstats");
 578                 exit(1);
 579         }
 580         (void)printf("%9u cpu context switches\n", vmm.v_swtch);
 581         (void)printf("%9u device interrupts\n", vmm.v_intr);
 582         (void)printf("%9u software interrupts\n", vmm.v_soft);
 583         (void)printf("%9u traps\n", vmm.v_trap);
 584         (void)printf("%9u system calls\n", vmm.v_syscall);
 585         (void)printf("%9u kernel threads created\n", vmm.v_kthreads);
 586         (void)printf("%9u  fork() calls\n", vmm.v_forks);
 587         (void)printf("%9u vfork() calls\n", vmm.v_vforks);
 588         (void)printf("%9u rfork() calls\n", vmm.v_rforks);
 589         (void)printf("%9u swap pager pageins\n", vmm.v_swapin);
 590         (void)printf("%9u swap pager pages paged in\n", vmm.v_swappgsin);
 591         (void)printf("%9u swap pager pageouts\n", vmm.v_swapout);
 592         (void)printf("%9u swap pager pages paged out\n", vmm.v_swappgsout);
 593         (void)printf("%9u vnode pager pageins\n", vmm.v_vnodein);
 594         (void)printf("%9u vnode pager pages paged in\n", vmm.v_vnodepgsin);
 595         (void)printf("%9u vnode pager pageouts\n", vmm.v_vnodeout);
 596         (void)printf("%9u vnode pager pages paged out\n", vmm.v_vnodepgsout);
 597         (void)printf("%9u page daemon wakeups\n", vmm.v_pdwakeups);
 598         (void)printf("%9u pages examined by the page daemon\n", vmm.v_pdpages);
 599         (void)printf("%9u pages reactivated\n", vmm.v_reactivated);
 600         (void)printf("%9u copy-on-write faults\n", vmm.v_cow_faults);
 601         (void)printf("%9u copy-on-write optimized faults\n", vmm.v_cow_optim);
 602         (void)printf("%9u zero fill pages zeroed\n", vmm.v_zfod);
 603         (void)printf("%9u zero fill pages prezeroed\n", vmm.v_ozfod);
 604         (void)printf("%9u intransit blocking page faults\n", vmm.v_intrans);
 605         (void)printf("%9u total VM faults taken\n", vmm.v_vm_faults);
 606         (void)printf("%9u pages affected by kernel thread creation\n", vmm.v_kthreadpages);
 607         (void)printf("%9u pages affected by  fork()\n", vmm.v_forkpages);
 608         (void)printf("%9u pages affected by vfork()\n", vmm.v_vforkpages);
 609         (void)printf("%9u pages affected by rfork()\n", vmm.v_rforkpages);
 610         (void)printf("%9u pages freed\n", vmm.v_tfree);
 611         (void)printf("%9u pages freed by daemon\n", vmm.v_dfree);
 612         (void)printf("%9u pages freed by exiting processes\n", vmm.v_pfree);
 613         (void)printf("%9u pages active\n", vms.v_active_count);
 614         (void)printf("%9u pages inactive\n", vms.v_inactive_count);
 615         (void)printf("%9u pages in VM cache\n", vms.v_cache_count);
 616         (void)printf("%9u pages wired down\n", vms.v_wire_count);
 617         (void)printf("%9u pages free\n", vms.v_free_count);
 618         (void)printf("%9u bytes per page\n", vms.v_page_size);
 619         kread(X_NCHSTATS, &nchstats, sizeof(nchstats));
 620         nchtotal = nchstats.ncs_goodhits + nchstats.ncs_neghits +
 621             nchstats.ncs_badhits + nchstats.ncs_falsehits +
 622             nchstats.ncs_miss + nchstats.ncs_long;
 623         (void)printf("%9ld total name lookups\n", nchtotal);
 624         (void)printf(
 625             "%9s cache hits (%ld%% pos + %ld%% neg) system %ld%% per-directory\n",
 626             "", PCT(nchstats.ncs_goodhits, nchtotal),
 627             PCT(nchstats.ncs_neghits, nchtotal),
 628             PCT(nchstats.ncs_pass2, nchtotal));
 629         (void)printf("%9s deletions %ld%%, falsehits %ld%%, toolong %ld%%\n", "",
 630             PCT(nchstats.ncs_badhits, nchtotal),
 631             PCT(nchstats.ncs_falsehits, nchtotal),
 632             PCT(nchstats.ncs_long, nchtotal));
 633 }
 634
 635 #ifdef notyet
 636 void
 637 doforkst(void)
 638 {
 639         struct forkstat fks;
 640
 641         kread(X_FORKSTAT, &fks, sizeof(struct forkstat));
 642         (void)printf("%d forks, %d pages, average %.2f\n",
 643             fks.cntfork, fks.sizfork, (double)fks.sizfork / fks.cntfork);
 644         (void)printf("%d vforks, %d pages, average %.2f\n",
 645             fks.cntvfork, fks.sizvfork, (double)fks.sizvfork / fks.cntvfork);
 646 }
 647 #endif
 648
 649 static void
 650 devstats(void)
 651 {
 652         register int dn, state;
 653         long double transfers_per_second;
 654         long double busy_seconds;
 655         long tmp;
 656
 657         for (state = 0; state < CPUSTATES; ++state) {
 658                 tmp = cur.cp_time[state];
 659                 cur.cp_time[state] -= last.cp_time[state];
 660                 last.cp_time[state] = tmp;
 661         }
 662
 663         busy_seconds = compute_etime(cur.busy_time, last.busy_time);
 664
 665         for (dn = 0; dn < num_devices; dn++) {
 666                 int di;
 667
 668                 if ((dev_select[dn].selected == 0)
 669                  || (dev_select[dn].selected > maxshowdevs))
 670                         continue;
 671
 672                 di = dev_select[dn].position;
 673
 674                 if (compute_stats(&cur.dinfo->devices[di],
 675                                   &last.dinfo->devices[di], busy_seconds,
 676                                   NULL, NULL, NULL,
 677                                   NULL, &transfers_per_second, NULL,
 678                                   NULL, NULL) != 0)
 679                         errx(1, "%s", devstat_errbuf);
 680
 681                 printf("%3.0Lf ", transfers_per_second);
 682         }
 683 }
 684
 685 void
 686 cpustats(void)
 687 {
 688         register int state;
 689         double pct, total;
 690
 691         total = 0;
 692         for (state = 0; state < CPUSTATES; ++state)
 693                 total += cur.cp_time[state];
 694         if (total)
 695                 pct = 100 / total;
 696         else
 697                 pct = 0;
 698         (void)printf("%2.0f ", (cur.cp_time[CP_USER] +
 699                                 cur.cp_time[CP_NICE]) * pct);
 700         (void)printf("%2.0f ", (cur.cp_time[CP_SYS] +
 701                                 cur.cp_time[CP_INTR]) * pct);
 702         (void)printf("%2.0f", cur.cp_time[CP_IDLE] * pct);
 703 }
 704
 705 void
 706 dointr(void)
 707 {
 708         register u_long *intrcnt, uptime;
 709         register u_int64_t inttotal;
 710         register int nintr, inamlen;
 711         register char *intrname;
 712
 713         uptime = getuptime();
 714         nintr = namelist[X_EINTRCNT].n_value - namelist[X_INTRCNT].n_value;
 715         inamlen =
 716             namelist[X_EINTRNAMES].n_value - namelist[X_INTRNAMES].n_value;
 717         intrcnt = malloc((size_t)nintr);
 718         intrname = malloc((size_t)inamlen);
 719         if (intrcnt == NULL || intrname == NULL)
 720                 errx(1, "malloc");
 721         kread(X_INTRCNT, intrcnt, (size_t)nintr);
 722         kread(X_INTRNAMES, intrname, (size_t)inamlen);
 723         (void)printf("interrupt                   total       rate\n");
 724         inttotal = 0;
 725         nintr /= sizeof(long);
 726         while (--nintr >= 0) {
 727                 if (*intrcnt)
 728                         (void)printf("%-12s %20lu %10lu\n", intrname,
 729                             *intrcnt, *intrcnt / uptime);
 730                 intrname += strlen(intrname) + 1;
 731                 inttotal += *intrcnt++;
 732         }
 733         (void)printf("Total        %20llu %10llu\n", inttotal,
 734                         inttotal / (u_int64_t) uptime);
 735 }
 736
 737 #define MAX_KMSTATS     200
 738
 739 void
 740 domem(void)
 741 {
 742         register struct kmembuckets *kp;
 743         register struct malloc_type *ks;
 744         register int i, j;
 745         int len, size, first, nkms;
 746         long totuse = 0, totfree = 0, totreq = 0;
 747         const char *name;
 748         struct malloc_type kmemstats[MAX_KMSTATS], *kmsp;
 749         char buf[1024];
 750         struct kmembuckets buckets[MINBUCKET + 16];
 751
 752 #ifdef X_KMEMBUCKETS
 753         kread(X_KMEMBUCKETS, buckets, sizeof(buckets));
 754 #else
 755         bzero(buckets, sizeof(buckets));
 756 #endif
 757         kread(X_KMEMSTATISTICS, &kmsp, sizeof(kmsp));
 758         for (nkms = 0; nkms < MAX_KMSTATS && kmsp != NULL; nkms++) {
 759                 if (sizeof(kmemstats[0]) != kvm_read(kd, (u_long)kmsp,
 760                     &kmemstats[nkms], sizeof(kmemstats[0])))
 761                         err(1, "kvm_read(%p)", (void *)kmsp);
 762                 if (sizeof(buf) !=  kvm_read(kd,
 763                     (u_long)kmemstats[nkms].ks_shortdesc, buf, sizeof(buf)))
 764                         err(1, "kvm_read(%p)",
 765                             (void *)kmemstats[nkms].ks_shortdesc);
 766                 buf[sizeof(buf) - 1] = '\0';
 767                 kmemstats[nkms].ks_shortdesc = strdup(buf);
 768                 kmsp = kmemstats[nkms].ks_next;
 769         }
 770         if (kmsp != NULL)
 771                 warnx("truncated to the first %d memory types", nkms);
 772         (void)printf("Memory statistics by bucket size\n");
 773         (void)printf(
 774             "Size   In Use   Free   Requests  HighWater  Couldfree\n");
 775         for (i = MINBUCKET, kp = &buckets[i]; i < MINBUCKET + 16; i++, kp++) {
 776                 if (kp->kb_calls == 0)
 777                         continue;
 778                 size = 1 << i;
 779                 if(size < 1024)
 780                         (void)printf("%4d",size);
 781                 else
 782                         (void)printf("%3dK",size>>10);
 783                 (void)printf(" %8ld %6ld %10lld %7ld %10ld\n",
 784                         kp->kb_total - kp->kb_totalfree,
 785                         kp->kb_totalfree, kp->kb_calls,
 786                         kp->kb_highwat, kp->kb_couldfree);
 787                 totfree += size * kp->kb_totalfree;
 788         }
 789
 790         (void)printf("\nMemory usage type by bucket size\n");
 791         (void)printf("Size  Type(s)\n");
 792         kp = &buckets[MINBUCKET];
 793         for (j =  1 << MINBUCKET; j < 1 << (MINBUCKET + 16); j <<= 1, kp++) {
 794                 if (kp->kb_calls == 0)
 795                         continue;
 796                 first = 1;
 797                 len = 8;
 798                 for (i = 0, ks = &kmemstats[0]; i < nkms; i++, ks++) {
 799                         if (ks->ks_calls == 0)
 800                                 continue;
 801                         if ((ks->ks_size & j) == 0)
 802                                 continue;
 803                         name = ks->ks_shortdesc;
 804                         len += 2 + strlen(name);
 805                         if (first && j < 1024)
 806                                 printf("%4d  %s", j, name);
 807                         else if (first)
 808                                 printf("%3dK  %s", j>>10, name);
 809                         else
 810                                 printf(",");
 811                         if (len >= 79) {
 812                                 printf("\n\t ");
 813                                 len = 10 + strlen(name);
 814                         }
 815                         if (!first)
 816                                 printf(" %s", name);
 817                         first = 0;
 818                 }
 819                 printf("\n");
 820         }
 821
 822         (void)printf(
 823             "\nMemory statistics by type                          Type  Kern\n");
 824         (void)printf(
 825 "        Type  InUse MemUse HighUse  Limit Requests Limit Limit Size(s)\n");
 826         for (i = 0, ks = &kmemstats[0]; i < nkms; i++, ks++) {
 827                 if (ks->ks_calls == 0)
 828                         continue;
 829                 (void)printf("%13s%6ld%6ldK%7ldK%6ldK%9lld%5u%6u",
 830                     ks->ks_shortdesc,
 831                     ks->ks_inuse, (ks->ks_memuse + 1023) / 1024,
 832                     (ks->ks_maxused + 1023) / 1024,
 833                     (ks->ks_limit + 1023) / 1024, ks->ks_calls,
 834                     ks->ks_limblocks, ks->ks_mapblocks);
 835                 first = 1;
 836                 for (j =  1 << MINBUCKET; j < 1 << (MINBUCKET + 16); j <<= 1) {
 837                         if ((ks->ks_size & j) == 0)
 838                                 continue;
 839                         if (first)
 840                                 printf("  ");
 841                         else
 842                                 printf(",");
 843                         if(j<1024)
 844                                 printf("%d",j);
 845                         else
 846                                 printf("%dK",j>>10);
 847                         first = 0;
 848                 }
 849                 printf("\n");
 850                 totuse += ks->ks_memuse;
 851                 totreq += ks->ks_calls;
 852         }
 853         (void)printf("\nMemory Totals:  In Use    Free    Requests\n");
 854         (void)printf("              %7ldK %6ldK    %8ld\n",
 855              (totuse + 1023) / 1024, (totfree + 1023) / 1024, totreq);
 856 }
 857
 858 void
 859 dozmem(void)
 860 {
 861         char *buf;
 862         size_t bufsize;
 863
 864         buf = NULL;
 865         bufsize = 1024;
 866         for (;;) {
 867                 if ((buf = realloc(buf, bufsize)) == NULL)
 868                         err(1, "realloc()");
 869                 if (sysctlbyname("vm.zone", buf, &bufsize, 0, NULL) == 0)
 870                         break;
 871                 if (errno != ENOMEM)
 872                         err(1, "sysctl()");
 873                 bufsize *= 2;
 874         }
 875         buf[bufsize] = '\0'; /* play it safe */
 876         (void)printf("%s\n\n", buf);
 877         free(buf);
 878 }
 879
 880 /*
 881  * kread reads something from the kernel, given its nlist index.
 882  */
 883 void
 884 kread(int nlx, void *addr, size_t size)
 885 {
 886         char *sym;
 887
 888         if (namelist[nlx].n_type == 0 || namelist[nlx].n_value == 0) {
 889                 sym = namelist[nlx].n_name;
 890                 if (*sym == '_')
 891                         ++sym;
 892                 errx(1, "symbol %s not defined", sym);
 893         }
 894         if (kvm_read(kd, namelist[nlx].n_value, addr, size) != size) {
 895                 sym = namelist[nlx].n_name;
 896                 if (*sym == '_')
 897                         ++sym;
 898                 errx(1, "%s: %s", sym, kvm_geterr(kd));
 899         }
 900 }
 901
 902 void
 903 usage(void)
 904 {
 905         (void)fprintf(stderr, "%s%s",
 906                 "usage: vmstat [-imsz] [-c count] [-M core] [-N system] [-w wait]\n",
 907                 "              [-n devs] [disks]\n");
 908         exit(1);
 909 }