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 1.3 2003/07/03 18:34:00 dillon Exp $
  37  */
  38
  39 #include <sys/param.h>
  40 #include <sys/time.h>
  41 #include <sys/proc.h>
  42 #include <sys/dkstat.h>
  43 #include <sys/uio.h>
  44 #include <sys/namei.h>
  45 #include <sys/malloc.h>
  46 #include <sys/signal.h>
  47 #include <sys/fcntl.h>
  48 #include <sys/ioctl.h>
  49 #include <sys/sysctl.h>
  50 #include <sys/vmmeter.h>
  51
  52 #include <vm/vm_param.h>
  53
  54 #include <ctype.h>
  55 #include <err.h>
  56 #include <errno.h>
  57 #include <kvm.h>
  58 #include <limits.h>
  59 #include <nlist.h>
  60 #include <paths.h>
  61 #include <stdio.h>
  62 #include <stdlib.h>
  63 #include <string.h>
  64 #include <sysexits.h>
  65 #include <time.h>
  66 #include <unistd.h>
  67 #include <devstat.h>
  68
  69 struct nlist namelist[] = {
  70 #define X_CPTIME        0
  71         { "_cp_time" },
  72 #define X_BOOTTIME      1
  73         { "_boottime" },
  74 #define X_HZ            2
  75         { "_hz" },
  76 #define X_STATHZ        3
  77         { "_stathz" },
  78 #define X_NCHSTATS      4
  79         { "_nchstats" },
  80 #define X_INTRNAMES     5
  81         { "_intrnames" },
  82 #define X_EINTRNAMES    6
  83         { "_eintrnames" },
  84 #define X_INTRCNT       8
  85         { "_intrcnt" },
  86 #define X_EINTRCNT      8
  87         { "_eintrcnt" },
  88 #define X_KMEMSTATISTICS        9
  89         { "_kmemstatistics" },
  90 #define X_KMEMBUCKETS   10
  91         { "_bucket" },
  92 #define X_ZLIST         11
  93         { "_zlist" },
  94 #ifdef notyet
  95 #define X_DEFICIT       12
  96         { "_deficit" },
  97 #define X_FORKSTAT      13
  98         { "_forkstat" },
  99 #define X_REC           14
 100         { "_rectime" },
 101 #define X_PGIN          15
 102         { "_pgintime" },
 103 #define X_XSTATS        16
 104         { "_xstats" },
 105 #define X_END           17
 106 #else
 107 #define X_END           18
 108 #endif
 109         { "" },
 110 };
 111
 112 struct statinfo cur, last;
 113 int num_devices, maxshowdevs;
 114 long generation;
 115 struct device_selection *dev_select;
 116 int num_selected;
 117 struct devstat_match *matches;
 118 int num_matches = 0;
 119 int num_devices_specified, num_selections;
 120 long select_generation;
 121 char **specified_devices;
 122 devstat_select_mode select_mode;
 123
 124 struct  vmmeter vmm, ovmm;
 125 struct  vmstats vms, ovms;
 126
 127 int     winlines = 20;
 128 int     nflag = 0;
 129
 130 kvm_t *kd;
 131
 132 #define FORKSTAT        0x01
 133 #define INTRSTAT        0x02
 134 #define MEMSTAT         0x04
 135 #define SUMSTAT         0x08
 136 #define TIMESTAT        0x10
 137 #define VMSTAT          0x20
 138 #define ZMEMSTAT        0x40
 139
 140 void    cpustats(), dointr(), domem(), dosum(), dozmem();
 141 void    dovmstat(), kread(), usage();
 142 #ifdef notyet
 143 void    dotimes(), doforkst();
 144 #endif
 145 void printhdr __P((void));
 146 static void devstats();
 147
 148 int
 149 main(argc, argv)
 150         register int argc;
 151         register char **argv;
 152 {
 153         register int c, todo;
 154         u_int interval;
 155         int reps;
 156         char *memf, *nlistf;
 157         char errbuf[_POSIX2_LINE_MAX];
 158
 159         memf = nlistf = NULL;
 160         interval = reps = todo = 0;
 161         maxshowdevs = 2;
 162         while ((c = getopt(argc, argv, "c:fiM:mN:n:p:stw:z")) != -1) {
 163                 switch (c) {
 164                 case 'c':
 165                         reps = atoi(optarg);
 166                         break;
 167                 case 'f':
 168 #ifdef notyet
 169                         todo |= FORKSTAT;
 170 #else
 171                         errx(EX_USAGE, "sorry, -f is not (re)implemented yet");
 172 #endif
 173                         break;
 174                 case 'i':
 175                         todo |= INTRSTAT;
 176                         break;
 177                 case 'M':
 178                         memf = optarg;
 179                         break;
 180                 case 'm':
 181                         todo |= MEMSTAT;
 182                         break;
 183                 case 'N':
 184                         nlistf = optarg;
 185                         break;
 186                 case 'n':
 187                         nflag = 1;
 188                         maxshowdevs = atoi(optarg);
 189                         if (maxshowdevs < 0)
 190                                 errx(1, "number of devices %d is < 0",
 191                                      maxshowdevs);
 192                         break;
 193                 case 'p':
 194                         if (buildmatch(optarg, &matches, &num_matches) != 0)
 195                                 errx(1, "%s", devstat_errbuf);
 196                         break;
 197                 case 's':
 198                         todo |= SUMSTAT;
 199                         break;
 200                 case 't':
 201 #ifdef notyet
 202                         todo |= TIMESTAT;
 203 #else
 204                         errx(EX_USAGE, "sorry, -t is not (re)implemented yet");
 205 #endif
 206                         break;
 207                 case 'w':
 208                         interval = atoi(optarg);
 209                         break;
 210                 case 'z':
 211                         todo |= ZMEMSTAT;
 212                         break;
 213                 case '?':
 214                 default:
 215                         usage();
 216                 }
 217         }
 218         argc -= optind;
 219         argv += optind;
 220
 221         if (todo == 0)
 222                 todo = VMSTAT;
 223
 224         /*
 225          * Discard setgid privileges if not the running kernel so that bad
 226          * guys can't print interesting stuff from kernel memory.
 227          */
 228         if (nlistf != NULL || memf != NULL)
 229                 setgid(getgid());
 230
 231         kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf);
 232         if (kd == 0)
 233                 errx(1, "kvm_openfiles: %s", errbuf);
 234
 235         if ((c = kvm_nlist(kd, namelist)) != 0) {
 236                 if (c > 0) {
 237                         warnx("undefined symbols:");
 238                         for (c = 0;
 239                             c < sizeof(namelist)/sizeof(namelist[0]); c++)
 240                                 if (namelist[c].n_type == 0)
 241                                         fprintf(stderr, " %s",
 242                                             namelist[c].n_name);
 243                         (void)fputc('\n', stderr);
 244                 } else
 245                         warnx("kvm_nlist: %s", kvm_geterr(kd));
 246                 exit(1);
 247         }
 248
 249         if (todo & VMSTAT) {
 250                 char **getdrivedata();
 251                 struct winsize winsize;
 252
 253                 /*
 254                  * Make sure that the userland devstat version matches the
 255                  * kernel devstat version.  If not, exit and print a
 256                  * message informing the user of his mistake.
 257                  */
 258                 if (checkversion() < 0)
 259                         errx(1, "%s", devstat_errbuf);
 260
 261
 262                 argv = getdrivedata(argv);
 263                 winsize.ws_row = 0;
 264                 (void) ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&winsize);
 265                 if (winsize.ws_row > 0)
 266                         winlines = winsize.ws_row;
 267
 268         }
 269
 270 #define BACKWARD_COMPATIBILITY
 271 #ifdef  BACKWARD_COMPATIBILITY
 272         if (*argv) {
 273                 interval = atoi(*argv);
 274                 if (*++argv)
 275                         reps = atoi(*argv);
 276         }
 277 #endif
 278
 279         if (interval) {
 280                 if (!reps)
 281                         reps = -1;
 282         } else if (reps)
 283                 interval = 1;
 284
 285 #ifdef notyet
 286         if (todo & FORKSTAT)
 287                 doforkst();
 288 #endif
 289         if (todo & MEMSTAT)
 290                 domem();
 291         if (todo & ZMEMSTAT)
 292                 dozmem();
 293         if (todo & SUMSTAT)
 294                 dosum();
 295 #ifdef notyet
 296         if (todo & TIMESTAT)
 297                 dotimes();
 298 #endif
 299         if (todo & INTRSTAT)
 300                 dointr();
 301         if (todo & VMSTAT)
 302                 dovmstat(interval, reps);
 303         exit(0);
 304 }
 305
 306 char **
 307 getdrivedata(argv)
 308         char **argv;
 309 {
 310         if ((num_devices = getnumdevs()) < 0)
 311                 errx(1, "%s", devstat_errbuf);
 312
 313         cur.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
 314         last.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
 315         bzero(cur.dinfo, sizeof(struct devinfo));
 316         bzero(last.dinfo, sizeof(struct devinfo));
 317
 318         if (getdevs(&cur) == -1)
 319                 errx(1, "%s", devstat_errbuf);
 320
 321         num_devices = cur.dinfo->numdevs;
 322         generation = cur.dinfo->generation;
 323
 324         specified_devices = (char **)malloc(sizeof(char *));
 325         for (num_devices_specified = 0; *argv; ++argv) {
 326                 if (isdigit(**argv))
 327                         break;
 328                 num_devices_specified++;
 329                 specified_devices = (char **)realloc(specified_devices,
 330                                                      sizeof(char *) *
 331                                                      num_devices_specified);
 332                 specified_devices[num_devices_specified - 1] = *argv;
 333         }
 334         dev_select = NULL;
 335
 336         if (nflag == 0 && maxshowdevs < num_devices_specified)
 337                         maxshowdevs = num_devices_specified;
 338
 339         /*
 340          * People are generally only interested in disk statistics when
 341          * they're running vmstat.  So, that's what we're going to give
 342          * them if they don't specify anything by default.  We'll also give
 343          * them any other random devices in the system so that we get to
 344          * maxshowdevs devices, if that many devices exist.  If the user
 345          * specifies devices on the command line, either through a pattern
 346          * match or by naming them explicitly, we will give the user only
 347          * those devices.
 348          */
 349         if ((num_devices_specified == 0) && (num_matches == 0)) {
 350                 if (buildmatch("da", &matches, &num_matches) != 0)
 351                         errx(1, "%s", devstat_errbuf);
 352
 353                 select_mode = DS_SELECT_ADD;
 354         } else
 355                 select_mode = DS_SELECT_ONLY;
 356
 357         /*
 358          * At this point, selectdevs will almost surely indicate that the
 359          * device list has changed, so we don't look for return values of 0
 360          * or 1.  If we get back -1, though, there is an error.
 361          */
 362         if (selectdevs(&dev_select, &num_selected, &num_selections,
 363                        &select_generation, generation, cur.dinfo->devices,
 364                        num_devices, matches, num_matches, specified_devices,
 365                        num_devices_specified, select_mode,
 366                        maxshowdevs, 0) == -1)
 367                 errx(1, "%s", devstat_errbuf);
 368
 369         return(argv);
 370 }
 371
 372 long
 373 getuptime()
 374 {
 375         static time_t now, boottime;
 376         time_t uptime;
 377
 378         if (boottime == 0)
 379                 kread(X_BOOTTIME, &boottime, sizeof(boottime));
 380         (void)time(&now);
 381         uptime = now - boottime;
 382         if (uptime <= 0 || uptime > 60*60*24*365*10)
 383                 errx(1, "time makes no sense; namelist must be wrong");
 384         return(uptime);
 385 }
 386
 387 int     hz, hdrcnt;
 388
 389 void
 390 dovmstat(interval, reps)
 391         u_int interval;
 392         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.vmstats");
 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()
 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()
 546 {
 547
 548         hdrcnt = 1;
 549 }
 550
 551 long
 552 pct(top, bot)
 553         long top, bot;
 554 {
 555         long ans;
 556
 557         if (bot == 0)
 558                 return(0);
 559         ans = (quad_t)top * 100 / bot;
 560         return (ans);
 561 }
 562
 563 #define PCT(top, bot) pct((long)(top), (long)(bot))
 564
 565 void
 566 dosum()
 567 {
 568         struct nchstats nchstats;
 569         long nchtotal;
 570         int vms_size = sizeof(vms);
 571         int vmm_size = sizeof(vmm);
 572
 573         if (sysctlbyname("vm.vmstats", &vms, &vms_size, NULL, 0)) {
 574                 perror("sysctlbyname: vm.vmstats");
 575                 exit(1);
 576         }
 577         if (sysctlbyname("vm.vmmeter", &vmm, &vmm_size, NULL, 0)) {
 578                 perror("sysctlbyname: vm.vmstats");
 579                 exit(1);
 580         }
 581         (void)printf("%9u cpu context switches\n", vmm.v_swtch);
 582         (void)printf("%9u device interrupts\n", vmm.v_intr);
 583         (void)printf("%9u software interrupts\n", vmm.v_soft);
 584         (void)printf("%9u traps\n", vmm.v_trap);
 585         (void)printf("%9u system calls\n", vmm.v_syscall);
 586         (void)printf("%9u kernel threads created\n", vmm.v_kthreads);
 587         (void)printf("%9u  fork() calls\n", vmm.v_forks);
 588         (void)printf("%9u vfork() calls\n", vmm.v_vforks);
 589         (void)printf("%9u rfork() calls\n", vmm.v_rforks);
 590         (void)printf("%9u swap pager pageins\n", vmm.v_swapin);
 591         (void)printf("%9u swap pager pages paged in\n", vmm.v_swappgsin);
 592         (void)printf("%9u swap pager pageouts\n", vmm.v_swapout);
 593         (void)printf("%9u swap pager pages paged out\n", vmm.v_swappgsout);
 594         (void)printf("%9u vnode pager pageins\n", vmm.v_vnodein);
 595         (void)printf("%9u vnode pager pages paged in\n", vmm.v_vnodepgsin);
 596         (void)printf("%9u vnode pager pageouts\n", vmm.v_vnodeout);
 597         (void)printf("%9u vnode pager pages paged out\n", vmm.v_vnodepgsout);
 598         (void)printf("%9u page daemon wakeups\n", vmm.v_pdwakeups);
 599         (void)printf("%9u pages examined by the page daemon\n", vmm.v_pdpages);
 600         (void)printf("%9u pages reactivated\n", vmm.v_reactivated);
 601         (void)printf("%9u copy-on-write faults\n", vmm.v_cow_faults);
 602         (void)printf("%9u copy-on-write optimized faults\n", vmm.v_cow_optim);
 603         (void)printf("%9u zero fill pages zeroed\n", vmm.v_zfod);
 604         (void)printf("%9u zero fill pages prezeroed\n", vmm.v_ozfod);
 605         (void)printf("%9u intransit blocking page faults\n", vmm.v_intrans);
 606         (void)printf("%9u total VM faults taken\n", vmm.v_vm_faults);
 607         (void)printf("%9u pages affected by kernel thread creation\n", vmm.v_kthreadpages);
 608         (void)printf("%9u pages affected by  fork()\n", vmm.v_forkpages);
 609         (void)printf("%9u pages affected by vfork()\n", vmm.v_vforkpages);
 610         (void)printf("%9u pages affected by rfork()\n", vmm.v_rforkpages);
 611         (void)printf("%9u pages freed\n", vmm.v_tfree);
 612         (void)printf("%9u pages freed by daemon\n", vmm.v_dfree);
 613         (void)printf("%9u pages freed by exiting processes\n", vmm.v_pfree);
 614         (void)printf("%9u pages active\n", vms.v_active_count);
 615         (void)printf("%9u pages inactive\n", vms.v_inactive_count);
 616         (void)printf("%9u pages in VM cache\n", vms.v_cache_count);
 617         (void)printf("%9u pages wired down\n", vms.v_wire_count);
 618         (void)printf("%9u pages free\n", vms.v_free_count);
 619         (void)printf("%9u bytes per page\n", vms.v_page_size);
 620         kread(X_NCHSTATS, &nchstats, sizeof(nchstats));
 621         nchtotal = nchstats.ncs_goodhits + nchstats.ncs_neghits +
 622             nchstats.ncs_badhits + nchstats.ncs_falsehits +
 623             nchstats.ncs_miss + nchstats.ncs_long;
 624         (void)printf("%9ld total name lookups\n", nchtotal);
 625         (void)printf(
 626             "%9s cache hits (%ld%% pos + %ld%% neg) system %ld%% per-directory\n",
 627             "", PCT(nchstats.ncs_goodhits, nchtotal),
 628             PCT(nchstats.ncs_neghits, nchtotal),
 629             PCT(nchstats.ncs_pass2, nchtotal));
 630         (void)printf("%9s deletions %ld%%, falsehits %ld%%, toolong %ld%%\n", "",
 631             PCT(nchstats.ncs_badhits, nchtotal),
 632             PCT(nchstats.ncs_falsehits, nchtotal),
 633             PCT(nchstats.ncs_long, nchtotal));
 634 }
 635
 636 #ifdef notyet
 637 void
 638 doforkst()
 639 {
 640         struct forkstat fks;
 641
 642         kread(X_FORKSTAT, &fks, sizeof(struct forkstat));
 643         (void)printf("%d forks, %d pages, average %.2f\n",
 644             fks.cntfork, fks.sizfork, (double)fks.sizfork / fks.cntfork);
 645         (void)printf("%d vforks, %d pages, average %.2f\n",
 646             fks.cntvfork, fks.sizvfork, (double)fks.sizvfork / fks.cntvfork);
 647 }
 648 #endif
 649
 650 static void
 651 devstats()
 652 {
 653         register int dn, state;
 654         long double transfers_per_second;
 655         long double busy_seconds;
 656         long tmp;
 657
 658         for (state = 0; state < CPUSTATES; ++state) {
 659                 tmp = cur.cp_time[state];
 660                 cur.cp_time[state] -= last.cp_time[state];
 661                 last.cp_time[state] = tmp;
 662         }
 663
 664         busy_seconds = compute_etime(cur.busy_time, last.busy_time);
 665
 666         for (dn = 0; dn < num_devices; dn++) {
 667                 int di;
 668
 669                 if ((dev_select[dn].selected == 0)
 670                  || (dev_select[dn].selected > maxshowdevs))
 671                         continue;
 672
 673                 di = dev_select[dn].position;
 674
 675                 if (compute_stats(&cur.dinfo->devices[di],
 676                                   &last.dinfo->devices[di], busy_seconds,
 677                                   NULL, NULL, NULL,
 678                                   NULL, &transfers_per_second, NULL,
 679                                   NULL, NULL) != 0)
 680                         errx(1, "%s", devstat_errbuf);
 681
 682                 printf("%3.0Lf ", transfers_per_second);
 683         }
 684 }
 685
 686 void
 687 cpustats()
 688 {
 689         register int state;
 690         double pct, total;
 691
 692         total = 0;
 693         for (state = 0; state < CPUSTATES; ++state)
 694                 total += cur.cp_time[state];
 695         if (total)
 696                 pct = 100 / total;
 697         else
 698                 pct = 0;
 699         (void)printf("%2.0f ", (cur.cp_time[CP_USER] +
 700                                 cur.cp_time[CP_NICE]) * pct);
 701         (void)printf("%2.0f ", (cur.cp_time[CP_SYS] +
 702                                 cur.cp_time[CP_INTR]) * pct);
 703         (void)printf("%2.0f", cur.cp_time[CP_IDLE] * pct);
 704 }
 705
 706 void
 707 dointr()
 708 {
 709         register u_long *intrcnt, uptime;
 710         register u_int64_t inttotal;
 711         register int nintr, inamlen;
 712         register char *intrname;
 713
 714         uptime = getuptime();
 715         nintr = namelist[X_EINTRCNT].n_value - namelist[X_INTRCNT].n_value;
 716         inamlen =
 717             namelist[X_EINTRNAMES].n_value - namelist[X_INTRNAMES].n_value;
 718         intrcnt = malloc((size_t)nintr);
 719         intrname = malloc((size_t)inamlen);
 720         if (intrcnt == NULL || intrname == NULL)
 721                 errx(1, "malloc");
 722         kread(X_INTRCNT, intrcnt, (size_t)nintr);
 723         kread(X_INTRNAMES, intrname, (size_t)inamlen);
 724         (void)printf("interrupt                   total       rate\n");
 725         inttotal = 0;
 726         nintr /= sizeof(long);
 727         while (--nintr >= 0) {
 728                 if (*intrcnt)
 729                         (void)printf("%-12s %20lu %10lu\n", intrname,
 730                             *intrcnt, *intrcnt / uptime);
 731                 intrname += strlen(intrname) + 1;
 732                 inttotal += *intrcnt++;
 733         }
 734         (void)printf("Total        %20llu %10llu\n", inttotal,
 735                         inttotal / (u_int64_t) uptime);
 736 }
 737
 738 #define MAX_KMSTATS     200
 739
 740 void
 741 domem()
 742 {
 743         register struct kmembuckets *kp;
 744         register struct malloc_type *ks;
 745         register int i, j;
 746         int len, size, first, nkms;
 747         long totuse = 0, totfree = 0, totreq = 0;
 748         const char *name;
 749         struct malloc_type kmemstats[MAX_KMSTATS], *kmsp;
 750         char buf[1024];
 751         struct kmembuckets buckets[MINBUCKET + 16];
 752
 753         kread(X_KMEMBUCKETS, buckets, sizeof(buckets));
 754         kread(X_KMEMSTATISTICS, &kmsp, sizeof(kmsp));
 755         for (nkms = 0; nkms < MAX_KMSTATS && kmsp != NULL; nkms++) {
 756                 if (sizeof(kmemstats[0]) != kvm_read(kd, (u_long)kmsp,
 757                     &kmemstats[nkms], sizeof(kmemstats[0])))
 758                         err(1, "kvm_read(%p)", (void *)kmsp);
 759                 if (sizeof(buf) !=  kvm_read(kd,
 760                     (u_long)kmemstats[nkms].ks_shortdesc, buf, sizeof(buf)))
 761                         err(1, "kvm_read(%p)",
 762                             (void *)kmemstats[nkms].ks_shortdesc);
 763                 buf[sizeof(buf) - 1] = '\0';
 764                 kmemstats[nkms].ks_shortdesc = strdup(buf);
 765                 kmsp = kmemstats[nkms].ks_next;
 766         }
 767         if (kmsp != NULL)
 768                 warnx("truncated to the first %d memory types", nkms);
 769         (void)printf("Memory statistics by bucket size\n");
 770         (void)printf(
 771             "Size   In Use   Free   Requests  HighWater  Couldfree\n");
 772         for (i = MINBUCKET, kp = &buckets[i]; i < MINBUCKET + 16; i++, kp++) {
 773                 if (kp->kb_calls == 0)
 774                         continue;
 775                 size = 1 << i;
 776                 if(size < 1024)
 777                         (void)printf("%4d",size);
 778                 else
 779                         (void)printf("%3dK",size>>10);
 780                 (void)printf(" %8ld %6ld %10lld %7ld %10ld\n",
 781                         kp->kb_total - kp->kb_totalfree,
 782                         kp->kb_totalfree, kp->kb_calls,
 783                         kp->kb_highwat, kp->kb_couldfree);
 784                 totfree += size * kp->kb_totalfree;
 785         }
 786
 787         (void)printf("\nMemory usage type by bucket size\n");
 788         (void)printf("Size  Type(s)\n");
 789         kp = &buckets[MINBUCKET];
 790         for (j =  1 << MINBUCKET; j < 1 << (MINBUCKET + 16); j <<= 1, kp++) {
 791                 if (kp->kb_calls == 0)
 792                         continue;
 793                 first = 1;
 794                 len = 8;
 795                 for (i = 0, ks = &kmemstats[0]; i < nkms; i++, ks++) {
 796                         if (ks->ks_calls == 0)
 797                                 continue;
 798                         if ((ks->ks_size & j) == 0)
 799                                 continue;
 800                         name = ks->ks_shortdesc;
 801                         len += 2 + strlen(name);
 802                         if (first && j < 1024)
 803                                 printf("%4d  %s", j, name);
 804                         else if (first)
 805                                 printf("%3dK  %s", j>>10, name);
 806                         else
 807                                 printf(",");
 808                         if (len >= 79) {
 809                                 printf("\n\t ");
 810                                 len = 10 + strlen(name);
 811                         }
 812                         if (!first)
 813                                 printf(" %s", name);
 814                         first = 0;
 815                 }
 816                 printf("\n");
 817         }
 818
 819         (void)printf(
 820             "\nMemory statistics by type                          Type  Kern\n");
 821         (void)printf(
 822 "        Type  InUse MemUse HighUse  Limit Requests Limit Limit Size(s)\n");
 823         for (i = 0, ks = &kmemstats[0]; i < nkms; i++, ks++) {
 824                 if (ks->ks_calls == 0)
 825                         continue;
 826                 (void)printf("%13s%6ld%6ldK%7ldK%6ldK%9lld%5u%6u",
 827                     ks->ks_shortdesc,
 828                     ks->ks_inuse, (ks->ks_memuse + 1023) / 1024,
 829                     (ks->ks_maxused + 1023) / 1024,
 830                     (ks->ks_limit + 1023) / 1024, ks->ks_calls,
 831                     ks->ks_limblocks, ks->ks_mapblocks);
 832                 first = 1;
 833                 for (j =  1 << MINBUCKET; j < 1 << (MINBUCKET + 16); j <<= 1) {
 834                         if ((ks->ks_size & j) == 0)
 835                                 continue;
 836                         if (first)
 837                                 printf("  ");
 838                         else
 839                                 printf(",");
 840                         if(j<1024)
 841                                 printf("%d",j);
 842                         else
 843                                 printf("%dK",j>>10);
 844                         first = 0;
 845                 }
 846                 printf("\n");
 847                 totuse += ks->ks_memuse;
 848                 totreq += ks->ks_calls;
 849         }
 850         (void)printf("\nMemory Totals:  In Use    Free    Requests\n");
 851         (void)printf("              %7ldK %6ldK    %8ld\n",
 852              (totuse + 1023) / 1024, (totfree + 1023) / 1024, totreq);
 853 }
 854
 855 void
 856 dozmem()
 857 {
 858         char *buf;
 859         size_t bufsize;
 860
 861         buf = NULL;
 862         bufsize = 1024;
 863         for (;;) {
 864                 if ((buf = realloc(buf, bufsize)) == NULL)
 865                         err(1, "realloc()");
 866                 if (sysctlbyname("vm.zone", buf, &bufsize, 0, NULL) == 0)
 867                         break;
 868                 if (errno != ENOMEM)
 869                         err(1, "sysctl()");
 870                 bufsize *= 2;
 871         }
 872         buf[bufsize] = '\0'; /* play it safe */
 873         (void)printf("%s\n\n", buf);
 874         free(buf);
 875 }
 876
 877 /*
 878  * kread reads something from the kernel, given its nlist index.
 879  */
 880 void
 881 kread(nlx, addr, size)
 882         int nlx;
 883         void *addr;
 884         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()
 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 }