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 1.23 2008/02/19 18:19:15 thomas Exp $
  37  */
  38
  39 #include <sys/user.h>
  40 #include <sys/param.h>
  41 #include <sys/time.h>
  42 #include <sys/uio.h>
  43 #include <sys/namei.h>
  44 #include <sys/malloc.h>
  45 #include <sys/signal.h>
  46 #include <sys/fcntl.h>
  47 #include <sys/ioctl.h>
  48 #include <sys/sysctl.h>
  49 #include <sys/vmmeter.h>
  50 #include <sys/interrupt.h>
  51
  52 #include <vm/vm_param.h>
  53
  54 #include <ctype.h>
  55 #include <err.h>
  56 #include <errno.h>
  57 #include <kinfo.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_BOOTTIME      0
  72         { "_boottime",  0, 0, 0, 0 },
  73 #define X_NCHSTATS      1
  74         { "_nchstats",  0, 0, 0, 0 },
  75 #define X_KMEMSTATISTICS        2
  76         { "_kmemstatistics",    0, 0, 0, 0 },
  77 #define X_ZLIST         3
  78         { "_zlist",     0, 0, 0, 0 },
  79 #ifdef notyet
  80 #define X_DEFICIT       4
  81         { "_deficit",   0, 0, 0, 0 },
  82 #define X_FORKSTAT      5
  83         { "_forkstat",  0, 0, 0, 0 },
  84 #define X_REC           6
  85         { "_rectime",   0, 0, 0, 0 },
  86 #define X_PGIN          7
  87         { "_pgintime",  0, 0, 0, 0 },
  88 #define X_XSTATS        8
  89         { "_xstats",    0, 0, 0, 0 },
  90 #define X_END           9
  91 #else
  92 #define X_END           4
  93 #endif
  94         { "", 0, 0, 0, 0 },
  95 };
  96
  97 struct statinfo cur, last;
  98 int num_devices, maxshowdevs;
  99 long generation;
 100 struct device_selection *dev_select;
 101 int num_selected;
 102 struct devstat_match *matches;
 103 int num_matches = 0;
 104 int num_devices_specified, num_selections;
 105 long select_generation;
 106 char **specified_devices;
 107 devstat_select_mode select_mode;
 108
 109 struct  vmmeter vmm, ovmm;
 110 struct  vmstats vms, ovms;
 111
 112 int     winlines = 20;
 113 int     nflag = 0;
 114 int     verbose = 0;
 115
 116 kvm_t *kd;
 117
 118 struct kinfo_cputime cp_time, old_cp_time, diff_cp_time;
 119
 120 #define FORKSTAT        0x01
 121 #define INTRSTAT        0x02
 122 #define MEMSTAT         0x04
 123 #define SUMSTAT         0x08
 124 #define TIMESTAT        0x10
 125 #define VMSTAT          0x20
 126 #define ZMEMSTAT        0x40
 127
 128 static void cpustats(void);
 129 static void dointr(void);
 130 static void domem(void);
 131 static void dosum(void);
 132 static void dozmem(void);
 133 static void dovmstat(u_int, int);
 134 static void kread(int, void *, size_t);
 135 static void usage(void);
 136 static char **getdrivedata(char **);
 137 static long getuptime(void);
 138 static void needhdr(int);
 139 static long pct(long, long);
 140
 141 #ifdef notyet
 142 static void dotimes(void); /* Not implemented */
 143 static void doforkst(void);
 144 #endif
 145 static void printhdr(void);
 146 static void devstats(void);
 147
 148 int
 149 main(int argc, char **argv)
 150 {
 151         int c, todo;
 152         u_int interval;         /* milliseconds */
 153         int reps;
 154         char *memf, *nlistf;
 155         char errbuf[_POSIX2_LINE_MAX];
 156
 157         memf = nlistf = NULL;
 158         interval = reps = todo = 0;
 159         maxshowdevs = 2;
 160         while ((c = getopt(argc, argv, "c:fiM:mN:n:p:stvw:z")) != -1) {
 161                 switch (c) {
 162                 case 'c':
 163                         reps = atoi(optarg);
 164                         break;
 165                 case 'f':
 166 #ifdef notyet
 167                         todo |= FORKSTAT;
 168 #else
 169                         errx(EX_USAGE, "sorry, -f is not (re)implemented yet");
 170 #endif
 171                         break;
 172                 case 'i':
 173                         todo |= INTRSTAT;
 174                         break;
 175                 case 'M':
 176                         memf = optarg;
 177                         break;
 178                 case 'm':
 179                         todo |= MEMSTAT;
 180                         break;
 181                 case 'N':
 182                         nlistf = optarg;
 183                         break;
 184                 case 'n':
 185                         nflag = 1;
 186                         maxshowdevs = atoi(optarg);
 187                         if (maxshowdevs < 0)
 188                                 errx(1, "number of devices %d is < 0",
 189                                      maxshowdevs);
 190                         break;
 191                 case 'p':
 192                         if (buildmatch(optarg, &matches, &num_matches) != 0)
 193                                 errx(1, "%s", devstat_errbuf);
 194                         break;
 195                 case 's':
 196                         todo |= SUMSTAT;
 197                         break;
 198                 case 't':
 199 #ifdef notyet
 200                         todo |= TIMESTAT;
 201 #else
 202                         errx(EX_USAGE, "sorry, -t is not (re)implemented yet");
 203 #endif
 204                         break;
 205                 case 'v':
 206                         ++verbose;
 207                         break;
 208                 case 'w':
 209                         interval = (u_int)(strtod(optarg, NULL) * 1000.0);
 210                         break;
 211                 case 'z':
 212                         todo |= ZMEMSTAT;
 213                         break;
 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; c < (int)__arysize(namelist); c++)
 239                                 if (namelist[c].n_type == 0)
 240                                         fprintf(stderr, " %s",
 241                                             namelist[c].n_name);
 242                         fputc('\n', stderr);
 243                 } else
 244                         warnx("kvm_nlist: %s", kvm_geterr(kd));
 245                 exit(1);
 246         }
 247
 248         if (todo & VMSTAT) {
 249                 struct winsize winsize;
 250
 251                 /*
 252                  * Make sure that the userland devstat version matches the
 253                  * kernel devstat version.  If not, exit and print a
 254                  * message informing the user of his mistake.
 255                  */
 256                 if (checkversion() < 0)
 257                         errx(1, "%s", devstat_errbuf);
 258
 259
 260                 argv = getdrivedata(argv);
 261                 winsize.ws_row = 0;
 262                 ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&winsize);
 263                 if (winsize.ws_row > 0)
 264                         winlines = winsize.ws_row;
 265
 266         }
 267
 268 #define BACKWARD_COMPATIBILITY
 269 #ifdef  BACKWARD_COMPATIBILITY
 270         if (*argv) {
 271                 interval = (u_int)(strtod(*argv, NULL) * 1000.0);
 272                 if (*++argv)
 273                         reps = atoi(*argv);
 274         }
 275 #endif
 276
 277         if (interval) {
 278                 if (!reps)
 279                         reps = -1;
 280         } else if (reps) {
 281                 interval = 1000;
 282         }
 283
 284 #ifdef notyet
 285         if (todo & FORKSTAT)
 286                 doforkst();
 287 #endif
 288         if (todo & MEMSTAT)
 289                 domem();
 290         if (todo & ZMEMSTAT)
 291                 dozmem();
 292         if (todo & SUMSTAT)
 293                 dosum();
 294 #ifdef notyet
 295         if (todo & TIMESTAT)
 296                 dotimes();
 297 #endif
 298         if (todo & INTRSTAT)
 299                 dointr();
 300         if (todo & VMSTAT)
 301                 dovmstat(interval, reps);
 302         exit(0);
 303 }
 304
 305 static char **
 306 getdrivedata(char **argv)
 307 {
 308         if ((num_devices = getnumdevs()) < 0)
 309                 errx(1, "%s", devstat_errbuf);
 310
 311         cur.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
 312         last.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
 313         bzero(cur.dinfo, sizeof(struct devinfo));
 314         bzero(last.dinfo, sizeof(struct devinfo));
 315
 316         if (getdevs(&cur) == -1)
 317                 errx(1, "%s", devstat_errbuf);
 318
 319         num_devices = cur.dinfo->numdevs;
 320         generation = cur.dinfo->generation;
 321
 322         specified_devices = (char **)malloc(sizeof(char *));
 323         for (num_devices_specified = 0; *argv; ++argv) {
 324                 if (isdigit(**argv))
 325                         break;
 326                 num_devices_specified++;
 327                 specified_devices = (char **)realloc(specified_devices,
 328                                                      sizeof(char *) *
 329                                                      num_devices_specified);
 330                 specified_devices[num_devices_specified - 1] = *argv;
 331         }
 332         dev_select = NULL;
 333
 334         if (nflag == 0 && maxshowdevs < num_devices_specified)
 335                         maxshowdevs = num_devices_specified;
 336
 337         /*
 338          * People are generally only interested in disk statistics when
 339          * they're running vmstat.  So, that's what we're going to give
 340          * them if they don't specify anything by default.  We'll also give
 341          * them any other random devices in the system so that we get to
 342          * maxshowdevs devices, if that many devices exist.  If the user
 343          * specifies devices on the command line, either through a pattern
 344          * match or by naming them explicitly, we will give the user only
 345          * those devices.
 346          */
 347         if ((num_devices_specified == 0) && (num_matches == 0)) {
 348                 if (buildmatch("da", &matches, &num_matches) != 0)
 349                         errx(1, "%s", devstat_errbuf);
 350
 351                 select_mode = DS_SELECT_ADD;
 352         } else
 353                 select_mode = DS_SELECT_ONLY;
 354
 355         /*
 356          * At this point, selectdevs will almost surely indicate that the
 357          * device list has changed, so we don't look for return values of 0
 358          * or 1.  If we get back -1, though, there is an error.
 359          */
 360         if (selectdevs(&dev_select, &num_selected, &num_selections,
 361                        &select_generation, generation, cur.dinfo->devices,
 362                        num_devices, matches, num_matches, specified_devices,
 363                        num_devices_specified, select_mode,
 364                        maxshowdevs, 0) == -1)
 365                 errx(1, "%s", devstat_errbuf);
 366
 367         return(argv);
 368 }
 369
 370 static long
 371 getuptime(void)
 372 {
 373         static time_t now, boottime;
 374         time_t uptime;
 375
 376         if (boottime == 0)
 377                 kread(X_BOOTTIME, &boottime, sizeof(boottime));
 378         time(&now);
 379         uptime = now - boottime;
 380         if (uptime <= 0 || uptime > 60*60*24*365*10)
 381                 errx(1, "time makes no sense; namelist must be wrong");
 382         return(uptime);
 383 }
 384
 385 int     hdrcnt;
 386
 387 static void
 388 dovmstat(u_int interval, int reps)
 389 {
 390         struct vmtotal total;
 391         struct devinfo *tmp_dinfo;
 392         size_t vmm_size = sizeof(vmm);
 393         size_t vms_size = sizeof(vms);
 394         size_t vmt_size = sizeof(total);
 395         int initial = 1;
 396
 397         signal(SIGCONT, needhdr);
 398
 399         for (hdrcnt = 1;;) {
 400                 if (!--hdrcnt)
 401                         printhdr();
 402                 if (kinfo_get_sched_cputime(&cp_time))
 403                         err(1, "kinfo_get_sched_cputime");
 404
 405                 tmp_dinfo = last.dinfo;
 406                 last.dinfo = cur.dinfo;
 407                 cur.dinfo = tmp_dinfo;
 408                 last.busy_time = cur.busy_time;
 409
 410                 /*
 411                  * Here what we want to do is refresh our device stats.
 412                  * getdevs() returns 1 when the device list has changed.
 413                  * If the device list has changed, we want to go through
 414                  * the selection process again, in case a device that we
 415                  * were previously displaying has gone away.
 416                  */
 417                 switch (getdevs(&cur)) {
 418                 case -1:
 419                         errx(1, "%s", devstat_errbuf);
 420                         break;
 421                 case 1: {
 422                         int retval;
 423
 424                         num_devices = cur.dinfo->numdevs;
 425                         generation = cur.dinfo->generation;
 426
 427                         retval = selectdevs(&dev_select, &num_selected,
 428                                             &num_selections, &select_generation,
 429                                             generation, cur.dinfo->devices,
 430                                             num_devices, matches, num_matches,
 431                                             specified_devices,
 432                                             num_devices_specified, select_mode,
 433                                             maxshowdevs, 0);
 434                         switch (retval) {
 435                         case -1:
 436                                 errx(1, "%s", devstat_errbuf);
 437                                 break;
 438                         case 1:
 439                                 printhdr();
 440                                 break;
 441                         default:
 442                                 break;
 443                         }
 444                 }
 445                 default:
 446                         break;
 447                 }
 448
 449                 if (sysctlbyname("vm.vmstats", &vms, &vms_size, NULL, 0)) {
 450                         perror("sysctlbyname: vm.vmstats");
 451                         exit(1);
 452                 }
 453                 if (sysctlbyname("vm.vmmeter", &vmm, &vmm_size, NULL, 0)) {
 454                         perror("sysctlbyname: vm.vmmeter");
 455                         exit(1);
 456                 }
 457                 if (sysctlbyname("vm.vmtotal", &total, &vmt_size, NULL, 0)) {
 458                         perror("sysctlbyname: vm.vmtotal");
 459                         exit(1);
 460                 }
 461                 printf("%2ld %1ld %1ld",
 462                     total.t_rq - 1, total.t_dw + total.t_pw, total.t_sw);
 463
 464 #define vmstat_pgtok(a) \
 465         (intmax_t)(((intmax_t)(a) * vms.v_page_size) >> 10)
 466 #define rate(x)         \
 467         (intmax_t)(initial ? (x) : ((intmax_t)(x) * 1000 + interval / 2) \
 468                                    / interval)
 469
 470                 printf(" %7jd %6jd ",
 471                        vmstat_pgtok(total.t_avm),
 472                        vmstat_pgtok(total.t_free));
 473                 printf("%4ju ",
 474                        rate(vmm.v_vm_faults - ovmm.v_vm_faults));
 475                 printf("%3ju ",
 476                        rate(vmm.v_reactivated - ovmm.v_reactivated));
 477                 printf("%3ju ",
 478                        rate(vmm.v_swapin + vmm.v_vnodein -
 479                             (ovmm.v_swapin + ovmm.v_vnodein)));
 480                 printf("%3ju ",
 481                        rate(vmm.v_swapout + vmm.v_vnodeout -
 482                             (ovmm.v_swapout + ovmm.v_vnodeout)));
 483                 printf("%3ju ",
 484                        rate(vmm.v_tfree - ovmm.v_tfree));
 485                 printf("%3ju ",
 486                        rate(vmm.v_pdpages - ovmm.v_pdpages));
 487                 devstats();
 488                 printf("%4ju %4ju %3ju ",
 489                        rate(vmm.v_intr - ovmm.v_intr),
 490                        rate(vmm.v_syscall - ovmm.v_syscall),
 491                        rate(vmm.v_swtch - ovmm.v_swtch));
 492                 cpustats();
 493                 printf("\n");
 494                 fflush(stdout);
 495                 if (reps >= 0 && --reps <= 0)
 496                         break;
 497                 ovmm = vmm;
 498                 usleep(interval * 1000);
 499                 initial = 0;
 500         }
 501 }
 502
 503 static void
 504 printhdr(void)
 505 {
 506         int i, num_shown;
 507
 508         num_shown = (num_selected < maxshowdevs) ? num_selected : maxshowdevs;
 509         printf(" procs      memory      page%*s", 19, "");
 510         if (num_shown > 1)
 511                 printf(" disks %*s", num_shown * 4 - 7, "");
 512         else if (num_shown == 1)
 513                 printf("disk");
 514         printf("   faults      cpu\n");
 515         printf(" r b w     avm    fre  flt  re  pi  po  fr  sr ");
 516         for (i = 0; i < num_devices; i++)
 517                 if ((dev_select[i].selected)
 518                  && (dev_select[i].selected <= maxshowdevs))
 519                         printf("%c%c%d ", dev_select[i].device_name[0],
 520                                      dev_select[i].device_name[1],
 521                                      dev_select[i].unit_number);
 522         printf("  in   sy  cs us sy id\n");
 523         hdrcnt = winlines - 2;
 524 }
 525
 526 /*
 527  * Force a header to be prepended to the next output.
 528  */
 529 static void
 530 needhdr(__unused int signo)
 531 {
 532
 533         hdrcnt = 1;
 534 }
 535
 536 static long
 537 pct(long top, long bot)
 538 {
 539         long ans;
 540
 541         if (bot == 0)
 542                 return(0);
 543         ans = (quad_t)top * 100 / bot;
 544         return (ans);
 545 }
 546
 547 #define PCT(top, bot) pct((long)(top), (long)(bot))
 548
 549 static void
 550 dosum(void)
 551 {
 552         struct nchstats *nch_tmp, nchstats;
 553         size_t vms_size = sizeof(vms);
 554         size_t vmm_size = sizeof(vmm);
 555         int cpucnt;
 556         u_long nchtotal;
 557         u_long nchpathtotal;
 558         size_t nch_size = sizeof(struct nchstats) * SMP_MAXCPU;
 559
 560         if (sysctlbyname("vm.vmstats", &vms, &vms_size, NULL, 0)) {
 561                 perror("sysctlbyname: vm.vmstats");
 562                 exit(1);
 563         }
 564         if (sysctlbyname("vm.vmmeter", &vmm, &vmm_size, NULL, 0)) {
 565                 perror("sysctlbyname: vm.vmstats");
 566                 exit(1);
 567         }
 568         printf("%9u cpu context switches\n", vmm.v_swtch);
 569         printf("%9u device interrupts\n", vmm.v_intr);
 570         printf("%9u software interrupts\n", vmm.v_soft);
 571         printf("%9u traps\n", vmm.v_trap);
 572         printf("%9u system calls\n", vmm.v_syscall);
 573         printf("%9u kernel threads created\n", vmm.v_kthreads);
 574         printf("%9u  fork() calls\n", vmm.v_forks);
 575         printf("%9u vfork() calls\n", vmm.v_vforks);
 576         printf("%9u rfork() calls\n", vmm.v_rforks);
 577         printf("%9u exec() calls\n", vmm.v_exec);
 578         printf("%9u swap pager pageins\n", vmm.v_swapin);
 579         printf("%9u swap pager pages paged in\n", vmm.v_swappgsin);
 580         printf("%9u swap pager pageouts\n", vmm.v_swapout);
 581         printf("%9u swap pager pages paged out\n", vmm.v_swappgsout);
 582         printf("%9u vnode pager pageins\n", vmm.v_vnodein);
 583         printf("%9u vnode pager pages paged in\n", vmm.v_vnodepgsin);
 584         printf("%9u vnode pager pageouts\n", vmm.v_vnodeout);
 585         printf("%9u vnode pager pages paged out\n", vmm.v_vnodepgsout);
 586         printf("%9u page daemon wakeups\n", vmm.v_pdwakeups);
 587         printf("%9u pages examined by the page daemon\n", vmm.v_pdpages);
 588         printf("%9u pages reactivated\n", vmm.v_reactivated);
 589         printf("%9u copy-on-write faults\n", vmm.v_cow_faults);
 590         printf("%9u copy-on-write optimized faults\n", vmm.v_cow_optim);
 591         printf("%9u zero fill pages zeroed\n", vmm.v_zfod);
 592         printf("%9u zero fill pages prezeroed\n", vmm.v_ozfod);
 593         printf("%9u intransit blocking page faults\n", vmm.v_intrans);
 594         printf("%9u total VM faults taken\n", vmm.v_vm_faults);
 595         printf("%9u pages affected by kernel thread creation\n", vmm.v_kthreadpages);
 596         printf("%9u pages affected by  fork()\n", vmm.v_forkpages);
 597         printf("%9u pages affected by vfork()\n", vmm.v_vforkpages);
 598         printf("%9u pages affected by rfork()\n", vmm.v_rforkpages);
 599         printf("%9u pages freed\n", vmm.v_tfree);
 600         printf("%9u pages freed by daemon\n", vmm.v_dfree);
 601         printf("%9u pages freed by exiting processes\n", vmm.v_pfree);
 602         printf("%9u pages active\n", vms.v_active_count);
 603         printf("%9u pages inactive\n", vms.v_inactive_count);
 604         printf("%9u pages in VM cache\n", vms.v_cache_count);
 605         printf("%9u pages wired down\n", vms.v_wire_count);
 606         printf("%9u pages free\n", vms.v_free_count);
 607         printf("%9u bytes per page\n", vms.v_page_size);
 608         printf("%9u global smp invltlbs\n", vmm.v_smpinvltlb);
 609
 610         if ((nch_tmp = malloc(nch_size)) == NULL) {
 611                 perror("malloc");
 612                 exit(1);
 613         } else {
 614                 if (sysctlbyname("vfs.cache.nchstats", nch_tmp, &nch_size, NULL, 0)) {
 615                         perror("sysctlbyname vfs.cache.nchstats");
 616                         free(nch_tmp);
 617                         exit(1);
 618                 } else {
 619                         if ((nch_tmp = realloc(nch_tmp, nch_size)) == NULL) {
 620                                 perror("realloc");
 621                                 exit(1);
 622                         }
 623                 }
 624         }
 625
 626         cpucnt = nch_size / sizeof(struct nchstats);
 627         kvm_nch_cpuagg(nch_tmp, &nchstats, cpucnt);
 628
 629         nchtotal = nchstats.ncs_goodhits + nchstats.ncs_neghits +
 630             nchstats.ncs_badhits + nchstats.ncs_falsehits +
 631             nchstats.ncs_miss;
 632         nchpathtotal = nchstats.ncs_longhits + nchstats.ncs_longmiss;
 633         printf("%9ld total path lookups\n", nchpathtotal);
 634         printf("%9ld total component lookups\n", nchtotal);
 635         printf(
 636             "%9s cache hits (%ld%% pos + %ld%% neg)\n",
 637             "", PCT(nchstats.ncs_goodhits, nchtotal),
 638             PCT(nchstats.ncs_neghits, nchtotal));
 639         printf("%9s deletions %ld%%, falsehits %ld%%\n", "",
 640             PCT(nchstats.ncs_badhits, nchtotal),
 641             PCT(nchstats.ncs_falsehits, nchtotal));
 642         free(nch_tmp);
 643 }
 644
 645 #ifdef notyet
 646 void
 647 doforkst(void)
 648 {
 649         struct forkstat fks;
 650
 651         kread(X_FORKSTAT, &fks, sizeof(struct forkstat));
 652         printf("%d forks, %d pages, average %.2f\n",
 653             fks.cntfork, fks.sizfork, (double)fks.sizfork / fks.cntfork);
 654         printf("%d vforks, %d pages, average %.2f\n",
 655             fks.cntvfork, fks.sizvfork, (double)fks.sizvfork / fks.cntvfork);
 656 }
 657 #endif
 658
 659 static void
 660 devstats(void)
 661 {
 662         int dn;
 663         long double transfers_per_second;
 664         long double busy_seconds;
 665
 666         diff_cp_time.cp_user = cp_time.cp_user - old_cp_time.cp_user;
 667         diff_cp_time.cp_nice = cp_time.cp_nice - old_cp_time.cp_nice;
 668         diff_cp_time.cp_sys = cp_time.cp_sys - old_cp_time.cp_sys;
 669         diff_cp_time.cp_intr = cp_time.cp_intr - old_cp_time.cp_intr;
 670         diff_cp_time.cp_idle = cp_time.cp_idle - old_cp_time.cp_idle;
 671         old_cp_time = cp_time;
 672
 673         busy_seconds = compute_etime(cur.busy_time, last.busy_time);
 674
 675         for (dn = 0; dn < num_devices; dn++) {
 676                 int di;
 677
 678                 if ((dev_select[dn].selected == 0)
 679                  || (dev_select[dn].selected > maxshowdevs))
 680                         continue;
 681
 682                 di = dev_select[dn].position;
 683
 684                 if (compute_stats(&cur.dinfo->devices[di],
 685                                   &last.dinfo->devices[di], busy_seconds,
 686                                   NULL, NULL, NULL,
 687                                   NULL, &transfers_per_second, NULL,
 688                                   NULL, NULL) != 0)
 689                         errx(1, "%s", devstat_errbuf);
 690
 691                 printf("%3.0Lf ", transfers_per_second);
 692         }
 693 }
 694
 695 static void
 696 cpustats(void)
 697 {
 698         uint64_t total;
 699         double totusage;
 700
 701         total = diff_cp_time.cp_user + diff_cp_time.cp_nice +
 702             diff_cp_time.cp_sys + diff_cp_time.cp_intr + diff_cp_time.cp_idle;
 703
 704         if (total)
 705                 totusage = 100.0 / total;
 706         else
 707                 totusage = 0;
 708         printf("%2.0f ",
 709                (diff_cp_time.cp_user + diff_cp_time.cp_nice) * totusage);
 710         printf("%2.0f ",
 711                (diff_cp_time.cp_sys + diff_cp_time.cp_intr) * totusage);
 712         printf("%2.0f",
 713                diff_cp_time.cp_idle * totusage);
 714 }
 715
 716 static void
 717 dointr(void)
 718 {
 719         u_long *intrcnt, uptime;
 720         u_int64_t inttotal;
 721         size_t nintr, inamlen, i, size;
 722         int nwidth;
 723         char *intrstr;
 724         char **intrname;
 725
 726         uptime = getuptime();
 727         if (sysctlbyname("hw.intrnames", NULL, &inamlen, NULL, 0) != 0)
 728                 errx(1, "sysctlbyname");
 729         intrstr = malloc(inamlen);
 730         if (intrstr == NULL)
 731                 err(1, "malloc");
 732         sysctlbyname("hw.intrnames", intrstr, &inamlen, NULL, 0);
 733         for (nintr = 0, i = 0; i < inamlen; ++i) {
 734                 if (intrstr[i] == 0)
 735                         nintr++;
 736         }
 737         intrname = malloc(nintr * sizeof(char *));
 738         for (i = 0; i < nintr; ++i) {
 739                 intrname[i] = intrstr;
 740                 intrstr += strlen(intrstr) + 1;
 741         }
 742
 743         size = nintr * sizeof(*intrcnt);
 744         intrcnt = calloc(nintr, sizeof(*intrcnt));
 745         if (intrcnt == NULL)
 746                 err(1, "malloc");
 747         sysctlbyname("hw.intrcnt", intrcnt, &size, NULL, 0);
 748
 749         nwidth = 21;
 750         for (i = 0; i < nintr; ++i) {
 751                 if (nwidth < (int)strlen(intrname[i]))
 752                         nwidth = (int)strlen(intrname[i]);
 753         }
 754         if (verbose) nwidth += 12;
 755
 756         printf("%-*.*s %11s %10s\n",
 757                 nwidth, nwidth, "interrupt", "total", "rate");
 758         inttotal = 0;
 759         for (i = 0; i < nintr; ++i) {
 760                 int named;
 761                 char *infop, irqinfo[72];
 762
 763                 if ((named = strncmp(intrname[i], "irq", 3)) != 0 ||
 764                     intrcnt[i] > 0) {
 765                         infop = intrname[i];
 766                         if (verbose) {
 767                                 ssize_t irq, cpu;
 768
 769                                 irq = i % MAX_INTS;
 770                                 cpu = i / MAX_INTS;
 771                                 if (named) {
 772                                         snprintf(irqinfo, sizeof(irqinfo),
 773                                                  "irq%-3zd %3zd: %s",
 774                                                  irq, cpu, intrname[i]);
 775                                 } else {
 776                                         snprintf(irqinfo, sizeof(irqinfo),
 777                                                  "irq%-3zd %3zd: ", irq, cpu);
 778                                 }
 779                                 infop = irqinfo;
 780                         }
 781                         printf("%-*.*s %11lu %10lu\n",
 782                                 nwidth, nwidth, infop,
 783                                 intrcnt[i], intrcnt[i] / uptime);
 784                 }
 785                 inttotal += intrcnt[i];
 786         }
 787         printf("%-*.*s %11llu %10llu\n",
 788                 nwidth, nwidth, "Total",
 789                 (long long)inttotal, (long long)(inttotal / uptime));
 790 }
 791
 792 #define MAX_KMSTATS     1024
 793
 794 static long
 795 cpuagg(size_t *ary)
 796 {
 797     int i;
 798     long ttl;
 799
 800     for (i = ttl = 0; i < SMP_MAXCPU; ++i)
 801         ttl += ary[i];
 802     return(ttl);
 803 }
 804
 805 static void
 806 domem(void)
 807 {
 808         struct malloc_type *ks;
 809         int i, j;
 810         int first, nkms;
 811         long totuse = 0, totfree = 0, totreq = 0;
 812         struct malloc_type kmemstats[MAX_KMSTATS], *kmsp;
 813         char buf[1024];
 814
 815         kread(X_KMEMSTATISTICS, &kmsp, sizeof(kmsp));
 816         for (nkms = 0; nkms < MAX_KMSTATS && kmsp != NULL; nkms++) {
 817                 if (sizeof(kmemstats[0]) != kvm_read(kd, (u_long)kmsp,
 818                     &kmemstats[nkms], sizeof(kmemstats[0])))
 819                         err(1, "kvm_read(%p)", (void *)kmsp);
 820                 if (sizeof(buf) !=  kvm_read(kd,
 821                     (u_long)kmemstats[nkms].ks_shortdesc, buf, sizeof(buf)))
 822                         err(1, "kvm_read(%p)",
 823                             kmemstats[nkms].ks_shortdesc);
 824                 buf[sizeof(buf) - 1] = '\0';
 825                 kmemstats[nkms].ks_shortdesc = strdup(buf);
 826                 kmsp = kmemstats[nkms].ks_next;
 827         }
 828         if (kmsp != NULL)
 829                 warnx("truncated to the first %d memory types", nkms);
 830
 831         printf(
 832             "\nMemory statistics by type                          Type  Kern\n");
 833         printf(
 834 "              Type   InUse  MemUse HighUse       Limit  Requests  Limit Limit\n");
 835         for (i = 0, ks = &kmemstats[0]; i < nkms; i++, ks++) {
 836                 if (ks->ks_calls == 0)
 837                         continue;
 838                 printf("%19s%7ld%7ldK%7ldK%11zdK%10jd%5u%6u",
 839                     ks->ks_shortdesc,
 840                     cpuagg(ks->ks_inuse), (cpuagg(ks->ks_memuse) + 1023) / 1024,
 841                     (ks->ks_maxused + 1023) / 1024,
 842                     (ks->ks_limit + 1023) / 1024, (intmax_t)ks->ks_calls,
 843                     ks->ks_limblocks, ks->ks_mapblocks);
 844                 first = 1;
 845                 for (j =  1 << MINBUCKET; j < 1 << (MINBUCKET + 16); j <<= 1) {
 846                         if ((ks->ks_size & j) == 0)
 847                                 continue;
 848                         if (first)
 849                                 printf("  ");
 850                         else
 851                                 printf(",");
 852                         if(j<1024)
 853                                 printf("%d",j);
 854                         else
 855                                 printf("%dK",j>>10);
 856                         first = 0;
 857                 }
 858                 printf("\n");
 859                 totuse += cpuagg(ks->ks_memuse);
 860                 totreq += ks->ks_calls;
 861         }
 862         printf("\nMemory Totals:  In Use    Free    Requests\n");
 863         printf("              %7ldK %6ldK    %8ld\n",
 864              (totuse + 1023) / 1024, (totfree + 1023) / 1024, totreq);
 865 }
 866
 867 static void
 868 dozmem(void)
 869 {
 870         char *buf;
 871         size_t bufsize;
 872
 873         buf = NULL;
 874         bufsize = 1024;
 875         for (;;) {
 876                 if ((buf = realloc(buf, bufsize)) == NULL)
 877                         err(1, "realloc()");
 878                 if (sysctlbyname("vm.zone", buf, &bufsize, NULL, 0) == 0)
 879                         break;
 880                 if (errno != ENOMEM)
 881                         err(1, "sysctl()");
 882                 bufsize *= 2;
 883         }
 884         buf[bufsize] = '\0'; /* play it safe */
 885         printf("%s\n\n", buf);
 886         free(buf);
 887 }
 888
 889 /*
 890  * kread reads something from the kernel, given its nlist index.
 891  */
 892 static void
 893 kread(int nlx, void *addr, size_t size)
 894 {
 895         const char *sym;
 896
 897         if (namelist[nlx].n_type == 0 || namelist[nlx].n_value == 0) {
 898                 sym = namelist[nlx].n_name;
 899                 if (*sym == '_')
 900                         ++sym;
 901                 errx(1, "symbol %s not defined", sym);
 902         }
 903         if (kvm_read(kd, namelist[nlx].n_value, addr, size) != (ssize_t)size) {
 904                 sym = namelist[nlx].n_name;
 905                 if (*sym == '_')
 906                         ++sym;
 907                 errx(1, "%s: %s", sym, kvm_geterr(kd));
 908         }
 909 }
 910
 911 static void
 912 usage(void)
 913 {
 914         fprintf(stderr, "%s%s",
 915                 "usage: vmstat [-imsvz] [-c count] [-M core] [-N system] [-w wait]\n",
 916                 "              [-n devs] [disks]\n");
 917         exit(1);
 918 }