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  * 4. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #ifndef lint
  31 static const char copyright[] =
  32 "@(#) Copyright (c) 1980, 1986, 1991, 1993\n\
  33         The Regents of the University of California.  All rights reserved.\n";
  34 #endif /* not lint */
  35
  36 #if 0
  37 #ifndef lint
  38 static char sccsid[] = "@(#)vmstat.c    8.1 (Berkeley) 6/6/93";
  39 #endif /* not lint */
  40 #endif
  41
  42 #include <sys/cdefs.h>
  43 __FBSDID("$FreeBSD$");
  44
  45 #include <sys/param.h>
  46 #include <sys/proc.h>
  47 #include <sys/uio.h>
  48 #include <sys/namei.h>
  49 #include <sys/malloc.h>
  50 #include <sys/signal.h>
  51 #include <sys/fcntl.h>
  52 #include <sys/ioctl.h>
  53 #include <sys/resource.h>
  54 #include <sys/sysctl.h>
  55 #include <sys/time.h>
  56 #include <sys/vmmeter.h>
  57 #include <sys/pcpu.h>
  58
  59 #include <vm/vm_param.h>
  60
  61 #include <ctype.h>
  62 #include <devstat.h>
  63 #include <err.h>
  64 #include <errno.h>
  65 #include <inttypes.h>
  66 #include <kvm.h>
  67 #include <limits.h>
  68 #include <memstat.h>
  69 #include <nlist.h>
  70 #include <paths.h>
  71 #include <stdio.h>
  72 #include <stdlib.h>
  73 #include <string.h>
  74 #include <sysexits.h>
  75 #include <time.h>
  76 #include <unistd.h>
  77 #include <libutil.h>
  78
  79 static char da[] = "da";
  80
  81 static struct nlist namelist[] = {
  82 #define X_SUM           0
  83         { "_vm_cnt" },
  84 #define X_HZ            1
  85         { "_hz" },
  86 #define X_STATHZ        2
  87         { "_stathz" },
  88 #define X_NCHSTATS      3
  89         { "_nchstats" },
  90 #define X_INTRNAMES     4
  91         { "_intrnames" },
  92 #define X_SINTRNAMES    5
  93         { "_sintrnames" },
  94 #define X_INTRCNT       6
  95         { "_intrcnt" },
  96 #define X_SINTRCNT      7
  97         { "_sintrcnt" },
  98 #ifdef notyet
  99 #define X_DEFICIT       XXX
 100         { "_deficit" },
 101 #define X_REC           XXX
 102         { "_rectime" },
 103 #define X_PGIN          XXX
 104         { "_pgintime" },
 105 #define X_XSTATS        XXX
 106         { "_xstats" },
 107 #define X_END           XXX
 108 #else
 109 #define X_END           8
 110 #endif
 111         { "" },
 112 };
 113
 114 static struct statinfo cur, last;
 115 static int num_devices, maxshowdevs;
 116 static long generation;
 117 static struct device_selection *dev_select;
 118 static int num_selected;
 119 static struct devstat_match *matches;
 120 static int num_matches = 0;
 121 static int num_devices_specified, num_selections;
 122 static long select_generation;
 123 static char **specified_devices;
 124 static devstat_select_mode select_mode;
 125
 126 static struct   vmmeter sum, osum;
 127
 128 #define VMSTAT_DEFAULT_LINES    20      /* Default number of `winlines'. */
 129 volatile sig_atomic_t wresized;         /* Tty resized, when non-zero. */
 130 static int winlines = VMSTAT_DEFAULT_LINES; /* Current number of tty rows. */
 131
 132 static int      aflag;
 133 static int      nflag;
 134 static int      Pflag;
 135 static int      hflag;
 136
 137 static kvm_t   *kd;
 138
 139 #define FORKSTAT        0x01
 140 #define INTRSTAT        0x02
 141 #define MEMSTAT         0x04
 142 #define SUMSTAT         0x08
 143 #define TIMESTAT        0x10
 144 #define VMSTAT          0x20
 145 #define ZMEMSTAT        0x40
 146
 147 static void     cpustats(void);
 148 static void     pcpustats(int, u_long, int);
 149 static void     devstats(void);
 150 static void     doforkst(void);
 151 static void     dointr(unsigned int, int);
 152 static void     dosum(void);
 153 static void     dovmstat(unsigned int, int);
 154 static void     domemstat_malloc(void);
 155 static void     domemstat_zone(void);
 156 static void     kread(int, void *, size_t);
 157 static void     kreado(int, void *, size_t, size_t);
 158 static char    *kgetstr(const char *);
 159 static void     needhdr(int);
 160 static void     needresize(int);
 161 static void     doresize(void);
 162 static void     printhdr(int, u_long);
 163 static void     usage(void);
 164
 165 static long     pct(long, long);
 166 static long long        getuptime(void);
 167
 168 static char   **getdrivedata(char **);
 169
 170 int
 171 main(int argc, char *argv[])
 172 {
 173         int c, todo;
 174         unsigned int interval;
 175         float f;
 176         int reps;
 177         char *memf, *nlistf;
 178         char errbuf[_POSIX2_LINE_MAX];
 179
 180         memf = nlistf = NULL;
 181         interval = reps = todo = 0;
 182         maxshowdevs = 2;
 183         hflag = isatty(1);
 184         while ((c = getopt(argc, argv, "ac:fhHiM:mN:n:Pp:stw:z")) != -1) {
 185                 switch (c) {
 186                 case 'a':
 187                         aflag++;
 188                         break;
 189                 case 'c':
 190                         reps = atoi(optarg);
 191                         break;
 192                 case 'P':
 193                         Pflag++;
 194                         break;
 195                 case 'f':
 196                         todo |= FORKSTAT;
 197                         break;
 198                 case 'h':
 199                         hflag = 1;
 200                         break;
 201                 case 'H':
 202                         hflag = 0;
 203                         break;
 204                 case 'i':
 205                         todo |= INTRSTAT;
 206                         break;
 207                 case 'M':
 208                         memf = optarg;
 209                         break;
 210                 case 'm':
 211                         todo |= MEMSTAT;
 212                         break;
 213                 case 'N':
 214                         nlistf = optarg;
 215                         break;
 216                 case 'n':
 217                         nflag = 1;
 218                         maxshowdevs = atoi(optarg);
 219                         if (maxshowdevs < 0)
 220                                 errx(1, "number of devices %d is < 0",
 221                                      maxshowdevs);
 222                         break;
 223                 case 'p':
 224                         if (devstat_buildmatch(optarg, &matches, &num_matches) != 0)
 225                                 errx(1, "%s", devstat_errbuf);
 226                         break;
 227                 case 's':
 228                         todo |= SUMSTAT;
 229                         break;
 230                 case 't':
 231 #ifdef notyet
 232                         todo |= TIMESTAT;
 233 #else
 234                         errx(EX_USAGE, "sorry, -t is not (re)implemented yet");
 235 #endif
 236                         break;
 237                 case 'w':
 238                         /* Convert to milliseconds. */
 239                         f = atof(optarg);
 240                         interval = f * 1000;
 241                         break;
 242                 case 'z':
 243                         todo |= ZMEMSTAT;
 244                         break;
 245                 case '?':
 246                 default:
 247                         usage();
 248                 }
 249         }
 250         argc -= optind;
 251         argv += optind;
 252
 253         if (todo == 0)
 254                 todo = VMSTAT;
 255
 256         if (memf != NULL) {
 257                 kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf);
 258                 if (kd == NULL)
 259                         errx(1, "kvm_openfiles: %s", errbuf);
 260         }
 261
 262 retry_nlist:
 263         if (kd != NULL && (c = kvm_nlist(kd, namelist)) != 0) {
 264                 if (c > 0) {
 265                         /*
 266                          * 'cnt' was renamed to 'vm_cnt'. If 'vm_cnt' is not
 267                          * found try looking up older 'cnt' symbol.
 268                          * */
 269                         if (namelist[X_SUM].n_type == 0 &&
 270                             strcmp(namelist[X_SUM].n_name, "_vm_cnt") == 0) {
 271                                 namelist[X_SUM].n_name = "_cnt";
 272                                 goto retry_nlist;
 273                         }
 274                         warnx("undefined symbols:");
 275                         for (c = 0;
 276                              c < (int)(sizeof(namelist)/sizeof(namelist[0]));
 277                              c++)
 278                                 if (namelist[c].n_type == 0)
 279                                         (void)fprintf(stderr, " %s",
 280                                             namelist[c].n_name);
 281                         (void)fputc('\n', stderr);
 282                 } else
 283                         warnx("kvm_nlist: %s", kvm_geterr(kd));
 284                 exit(1);
 285         }
 286         if (kd && Pflag)
 287                 errx(1, "Cannot use -P with crash dumps");
 288
 289         if (todo & VMSTAT) {
 290                 /*
 291                  * Make sure that the userland devstat version matches the
 292                  * kernel devstat version.  If not, exit and print a
 293                  * message informing the user of his mistake.
 294                  */
 295                 if (devstat_checkversion(NULL) < 0)
 296                         errx(1, "%s", devstat_errbuf);
 297
 298
 299                 argv = getdrivedata(argv);
 300         }
 301
 302         if (*argv) {
 303                 f = atof(*argv);
 304                 interval = f * 1000;
 305                 if (*++argv)
 306                         reps = atoi(*argv);
 307         }
 308
 309         if (interval) {
 310                 if (!reps)
 311                         reps = -1;
 312         } else if (reps)
 313                 interval = 1 * 1000;
 314
 315         if (todo & FORKSTAT)
 316                 doforkst();
 317         if (todo & MEMSTAT)
 318                 domemstat_malloc();
 319         if (todo & ZMEMSTAT)
 320                 domemstat_zone();
 321         if (todo & SUMSTAT)
 322                 dosum();
 323 #ifdef notyet
 324         if (todo & TIMESTAT)
 325                 dotimes();
 326 #endif
 327         if (todo & INTRSTAT)
 328                 dointr(interval, reps);
 329         if (todo & VMSTAT)
 330                 dovmstat(interval, reps);
 331         exit(0);
 332 }
 333
 334 static int
 335 mysysctl(const char *name, void *oldp, size_t *oldlenp,
 336     void *newp, size_t newlen)
 337 {
 338         int error;
 339
 340         error = sysctlbyname(name, oldp, oldlenp, newp, newlen);
 341         if (error != 0 && errno != ENOMEM)
 342                 err(1, "sysctl(%s)", name);
 343         return (error);
 344 }
 345
 346 static char **
 347 getdrivedata(char **argv)
 348 {
 349         if ((num_devices = devstat_getnumdevs(NULL)) < 0)
 350                 errx(1, "%s", devstat_errbuf);
 351
 352         cur.dinfo = (struct devinfo *)calloc(1, sizeof(struct devinfo));
 353         last.dinfo = (struct devinfo *)calloc(1, sizeof(struct devinfo));
 354
 355         if (devstat_getdevs(NULL, &cur) == -1)
 356                 errx(1, "%s", devstat_errbuf);
 357
 358         num_devices = cur.dinfo->numdevs;
 359         generation = cur.dinfo->generation;
 360
 361         specified_devices = (char **)malloc(sizeof(char *));
 362         for (num_devices_specified = 0; *argv; ++argv) {
 363                 if (isdigit(**argv))
 364                         break;
 365                 num_devices_specified++;
 366                 specified_devices = (char **)realloc(specified_devices,
 367                                                      sizeof(char *) *
 368                                                      num_devices_specified);
 369                 specified_devices[num_devices_specified - 1] = *argv;
 370         }
 371         dev_select = NULL;
 372
 373         if (nflag == 0 && maxshowdevs < num_devices_specified)
 374                         maxshowdevs = num_devices_specified;
 375
 376         /*
 377          * People are generally only interested in disk statistics when
 378          * they're running vmstat.  So, that's what we're going to give
 379          * them if they don't specify anything by default.  We'll also give
 380          * them any other random devices in the system so that we get to
 381          * maxshowdevs devices, if that many devices exist.  If the user
 382          * specifies devices on the command line, either through a pattern
 383          * match or by naming them explicitly, we will give the user only
 384          * those devices.
 385          */
 386         if ((num_devices_specified == 0) && (num_matches == 0)) {
 387                 if (devstat_buildmatch(da, &matches, &num_matches) != 0)
 388                         errx(1, "%s", devstat_errbuf);
 389
 390                 select_mode = DS_SELECT_ADD;
 391         } else
 392                 select_mode = DS_SELECT_ONLY;
 393
 394         /*
 395          * At this point, selectdevs will almost surely indicate that the
 396          * device list has changed, so we don't look for return values of 0
 397          * or 1.  If we get back -1, though, there is an error.
 398          */
 399         if (devstat_selectdevs(&dev_select, &num_selected, &num_selections,
 400                        &select_generation, generation, cur.dinfo->devices,
 401                        num_devices, matches, num_matches, specified_devices,
 402                        num_devices_specified, select_mode,
 403                        maxshowdevs, 0) == -1)
 404                 errx(1, "%s", devstat_errbuf);
 405
 406         return(argv);
 407 }
 408
 409 /* Return system uptime in nanoseconds */
 410 static long long
 411 getuptime(void)
 412 {
 413         struct timespec sp;
 414
 415         (void)clock_gettime(CLOCK_UPTIME, &sp);
 416
 417         return((long long)sp.tv_sec * 1000000000LL + sp.tv_nsec);
 418 }
 419
 420 static void
 421 fill_pcpu(struct pcpu ***pcpup, int* maxcpup)
 422 {
 423         struct pcpu **pcpu;
 424
 425         int maxcpu, i;
 426
 427         *pcpup = NULL;
 428
 429         if (kd == NULL)
 430                 return;
 431
 432         maxcpu = kvm_getmaxcpu(kd);
 433         if (maxcpu < 0)
 434                 errx(1, "kvm_getmaxcpu: %s", kvm_geterr(kd));
 435
 436         pcpu = calloc(maxcpu, sizeof(struct pcpu *));
 437         if (pcpu == NULL)
 438                 err(1, "calloc");
 439
 440         for (i = 0; i < maxcpu; i++) {
 441                 pcpu[i] = kvm_getpcpu(kd, i);
 442                 if (pcpu[i] == (struct pcpu *)-1)
 443                         errx(1, "kvm_getpcpu: %s", kvm_geterr(kd));
 444         }
 445
 446         *maxcpup = maxcpu;
 447         *pcpup = pcpu;
 448 }
 449
 450 static void
 451 free_pcpu(struct pcpu **pcpu, int maxcpu)
 452 {
 453         int i;
 454
 455         for (i = 0; i < maxcpu; i++)
 456                 free(pcpu[i]);
 457         free(pcpu);
 458 }
 459
 460 static void
 461 fill_vmmeter(struct vmmeter *vmmp)
 462 {
 463         struct pcpu **pcpu;
 464         int maxcpu, i;
 465
 466         if (kd != NULL) {
 467                 kread(X_SUM, vmmp, sizeof(*vmmp));
 468                 fill_pcpu(&pcpu, &maxcpu);
 469                 for (i = 0; i < maxcpu; i++) {
 470                         if (pcpu[i] == NULL)
 471                                 continue;
 472 #define ADD_FROM_PCPU(i, name) \
 473                         vmmp->name += pcpu[i]->pc_cnt.name
 474                         ADD_FROM_PCPU(i, v_swtch);
 475                         ADD_FROM_PCPU(i, v_trap);
 476                         ADD_FROM_PCPU(i, v_syscall);
 477                         ADD_FROM_PCPU(i, v_intr);
 478                         ADD_FROM_PCPU(i, v_soft);
 479                         ADD_FROM_PCPU(i, v_vm_faults);
 480                         ADD_FROM_PCPU(i, v_io_faults);
 481                         ADD_FROM_PCPU(i, v_cow_faults);
 482                         ADD_FROM_PCPU(i, v_cow_optim);
 483                         ADD_FROM_PCPU(i, v_zfod);
 484                         ADD_FROM_PCPU(i, v_ozfod);
 485                         ADD_FROM_PCPU(i, v_swapin);
 486                         ADD_FROM_PCPU(i, v_swapout);
 487                         ADD_FROM_PCPU(i, v_swappgsin);
 488                         ADD_FROM_PCPU(i, v_swappgsout);
 489                         ADD_FROM_PCPU(i, v_vnodein);
 490                         ADD_FROM_PCPU(i, v_vnodeout);
 491                         ADD_FROM_PCPU(i, v_vnodepgsin);
 492                         ADD_FROM_PCPU(i, v_vnodepgsout);
 493                         ADD_FROM_PCPU(i, v_intrans);
 494                         ADD_FROM_PCPU(i, v_tfree);
 495                         ADD_FROM_PCPU(i, v_forks);
 496                         ADD_FROM_PCPU(i, v_vforks);
 497                         ADD_FROM_PCPU(i, v_rforks);
 498                         ADD_FROM_PCPU(i, v_kthreads);
 499                         ADD_FROM_PCPU(i, v_forkpages);
 500                         ADD_FROM_PCPU(i, v_vforkpages);
 501                         ADD_FROM_PCPU(i, v_rforkpages);
 502                         ADD_FROM_PCPU(i, v_kthreadpages);
 503 #undef ADD_FROM_PCPU
 504                 }
 505                 free_pcpu(pcpu, maxcpu);
 506         } else {
 507                 size_t size = sizeof(unsigned int);
 508 #define GET_VM_STATS(cat, name) \
 509         mysysctl("vm.stats." #cat "." #name, &vmmp->name, &size, NULL, 0)
 510                 /* sys */
 511                 GET_VM_STATS(sys, v_swtch);
 512                 GET_VM_STATS(sys, v_trap);
 513                 GET_VM_STATS(sys, v_syscall);
 514                 GET_VM_STATS(sys, v_intr);
 515                 GET_VM_STATS(sys, v_soft);
 516
 517                 /* vm */
 518                 GET_VM_STATS(vm, v_vm_faults);
 519                 GET_VM_STATS(vm, v_io_faults);
 520                 GET_VM_STATS(vm, v_cow_faults);
 521                 GET_VM_STATS(vm, v_cow_optim);
 522                 GET_VM_STATS(vm, v_zfod);
 523                 GET_VM_STATS(vm, v_ozfod);
 524                 GET_VM_STATS(vm, v_swapin);
 525                 GET_VM_STATS(vm, v_swapout);
 526                 GET_VM_STATS(vm, v_swappgsin);
 527                 GET_VM_STATS(vm, v_swappgsout);
 528                 GET_VM_STATS(vm, v_vnodein);
 529                 GET_VM_STATS(vm, v_vnodeout);
 530                 GET_VM_STATS(vm, v_vnodepgsin);
 531                 GET_VM_STATS(vm, v_vnodepgsout);
 532                 GET_VM_STATS(vm, v_intrans);
 533                 GET_VM_STATS(vm, v_reactivated);
 534                 GET_VM_STATS(vm, v_pdwakeups);
 535                 GET_VM_STATS(vm, v_pdpages);
 536                 GET_VM_STATS(vm, v_tcached);
 537                 GET_VM_STATS(vm, v_dfree);
 538                 GET_VM_STATS(vm, v_pfree);
 539                 GET_VM_STATS(vm, v_tfree);
 540                 GET_VM_STATS(vm, v_page_size);
 541                 GET_VM_STATS(vm, v_page_count);
 542                 GET_VM_STATS(vm, v_free_reserved);
 543                 GET_VM_STATS(vm, v_free_target);
 544                 GET_VM_STATS(vm, v_free_min);
 545                 GET_VM_STATS(vm, v_free_count);
 546                 GET_VM_STATS(vm, v_wire_count);
 547                 GET_VM_STATS(vm, v_active_count);
 548                 GET_VM_STATS(vm, v_inactive_target);
 549                 GET_VM_STATS(vm, v_inactive_count);
 550                 GET_VM_STATS(vm, v_cache_count);
 551                 GET_VM_STATS(vm, v_cache_min);
 552                 GET_VM_STATS(vm, v_cache_max);
 553                 GET_VM_STATS(vm, v_pageout_free_min);
 554                 GET_VM_STATS(vm, v_interrupt_free_min);
 555                 /*GET_VM_STATS(vm, v_free_severe);*/
 556                 GET_VM_STATS(vm, v_forks);
 557                 GET_VM_STATS(vm, v_vforks);
 558                 GET_VM_STATS(vm, v_rforks);
 559                 GET_VM_STATS(vm, v_kthreads);
 560                 GET_VM_STATS(vm, v_forkpages);
 561                 GET_VM_STATS(vm, v_vforkpages);
 562                 GET_VM_STATS(vm, v_rforkpages);
 563                 GET_VM_STATS(vm, v_kthreadpages);
 564 #undef GET_VM_STATS
 565         }
 566 }
 567
 568 static void
 569 fill_vmtotal(struct vmtotal *vmtp)
 570 {
 571         if (kd != NULL) {
 572                 /* XXX fill vmtp */
 573                 errx(1, "not implemented");
 574         } else {
 575                 size_t size = sizeof(*vmtp);
 576                 mysysctl("vm.vmtotal", vmtp, &size, NULL, 0);
 577                 if (size != sizeof(*vmtp))
 578                         errx(1, "vm.total size mismatch");
 579         }
 580 }
 581
 582 /* Determine how many cpu columns, and what index they are in kern.cp_times */
 583 static int
 584 getcpuinfo(u_long *maskp, int *maxidp)
 585 {
 586         int maxcpu;
 587         int maxid;
 588         int ncpus;
 589         int i, j;
 590         int empty;
 591         size_t size;
 592         long *times;
 593         u_long mask;
 594
 595         if (kd != NULL)
 596                 errx(1, "not implemented");
 597         mask = 0;
 598         ncpus = 0;
 599         size = sizeof(maxcpu);
 600         mysysctl("kern.smp.maxcpus", &maxcpu, &size, NULL, 0);
 601         if (size != sizeof(maxcpu))
 602                 errx(1, "sysctl kern.smp.maxcpus");
 603         size = sizeof(long) * maxcpu * CPUSTATES;
 604         times = malloc(size);
 605         if (times == NULL)
 606                 err(1, "malloc %zd bytes", size);
 607         mysysctl("kern.cp_times", times, &size, NULL, 0);
 608         maxid = (size / CPUSTATES / sizeof(long)) - 1;
 609         for (i = 0; i <= maxid; i++) {
 610                 empty = 1;
 611                 for (j = 0; empty && j < CPUSTATES; j++) {
 612                         if (times[i * CPUSTATES + j] != 0)
 613                                 empty = 0;
 614                 }
 615                 if (!empty) {
 616                         mask |= (1ul << i);
 617                         ncpus++;
 618                 }
 619         }
 620         if (maskp)
 621                 *maskp = mask;
 622         if (maxidp)
 623                 *maxidp = maxid;
 624         return (ncpus);
 625 }
 626
 627
 628 static void
 629 prthuman(u_int64_t val, int size)
 630 {
 631         char buf[10];
 632         int flags;
 633
 634         if (size < 5 || size > 9)
 635                 errx(1, "doofus");
 636         flags = HN_B | HN_NOSPACE | HN_DECIMAL;
 637         humanize_number(buf, size, val, "", HN_AUTOSCALE, flags);
 638         printf("%*s", size, buf);
 639 }
 640
 641 static int hz, hdrcnt;
 642
 643 static long *cur_cp_times;
 644 static long *last_cp_times;
 645 static size_t size_cp_times;
 646
 647 static void
 648 dovmstat(unsigned int interval, int reps)
 649 {
 650         struct vmtotal total;
 651         time_t uptime, halfuptime;
 652         struct devinfo *tmp_dinfo;
 653         size_t size;
 654         int ncpus, maxid;
 655         u_long cpumask;
 656         int rate_adj;
 657
 658         uptime = getuptime() / 1000000000LL;
 659         halfuptime = uptime / 2;
 660         rate_adj = 1;
 661         ncpus = 1;
 662         maxid = 0;
 663
 664         /*
 665          * If the user stops the program (control-Z) and then resumes it,
 666          * print out the header again.
 667          */
 668         (void)signal(SIGCONT, needhdr);
 669
 670         /*
 671          * If our standard output is a tty, then install a SIGWINCH handler
 672          * and set wresized so that our first iteration through the main
 673          * vmstat loop will peek at the terminal's current rows to find out
 674          * how many lines can fit in a screenful of output.
 675          */
 676         if (isatty(fileno(stdout)) != 0) {
 677                 wresized = 1;
 678                 (void)signal(SIGWINCH, needresize);
 679         } else {
 680                 wresized = 0;
 681                 winlines = VMSTAT_DEFAULT_LINES;
 682         }
 683
 684         if (kd != NULL) {
 685                 if (namelist[X_STATHZ].n_type != 0 &&
 686                     namelist[X_STATHZ].n_value != 0)
 687                         kread(X_STATHZ, &hz, sizeof(hz));
 688                 if (!hz)
 689                         kread(X_HZ, &hz, sizeof(hz));
 690         } else {
 691                 struct clockinfo clockrate;
 692
 693                 size = sizeof(clockrate);
 694                 mysysctl("kern.clockrate", &clockrate, &size, NULL, 0);
 695                 if (size != sizeof(clockrate))
 696                         errx(1, "clockrate size mismatch");
 697                 hz = clockrate.hz;
 698         }
 699
 700         if (Pflag) {
 701                 ncpus = getcpuinfo(&cpumask, &maxid);
 702                 size_cp_times = sizeof(long) * (maxid + 1) * CPUSTATES;
 703                 cur_cp_times = calloc(1, size_cp_times);
 704                 last_cp_times = calloc(1, size_cp_times);
 705         }
 706         for (hdrcnt = 1;;) {
 707                 if (!--hdrcnt)
 708                         printhdr(maxid, cpumask);
 709                 if (kd != NULL) {
 710                         if (kvm_getcptime(kd, cur.cp_time) < 0)
 711                                 errx(1, "kvm_getcptime: %s", kvm_geterr(kd));
 712                 } else {
 713                         size = sizeof(cur.cp_time);
 714                         mysysctl("kern.cp_time", &cur.cp_time, &size, NULL, 0);
 715                         if (size != sizeof(cur.cp_time))
 716                                 errx(1, "cp_time size mismatch");
 717                 }
 718                 if (Pflag) {
 719                         size = size_cp_times;
 720                         mysysctl("kern.cp_times", cur_cp_times, &size, NULL, 0);
 721                         if (size != size_cp_times)
 722                                 errx(1, "cp_times mismatch");
 723                 }
 724
 725                 tmp_dinfo = last.dinfo;
 726                 last.dinfo = cur.dinfo;
 727                 cur.dinfo = tmp_dinfo;
 728                 last.snap_time = cur.snap_time;
 729
 730                 /*
 731                  * Here what we want to do is refresh our device stats.
 732                  * getdevs() returns 1 when the device list has changed.
 733                  * If the device list has changed, we want to go through
 734                  * the selection process again, in case a device that we
 735                  * were previously displaying has gone away.
 736                  */
 737                 switch (devstat_getdevs(NULL, &cur)) {
 738                 case -1:
 739                         errx(1, "%s", devstat_errbuf);
 740                         break;
 741                 case 1: {
 742                         int retval;
 743
 744                         num_devices = cur.dinfo->numdevs;
 745                         generation = cur.dinfo->generation;
 746
 747                         retval = devstat_selectdevs(&dev_select, &num_selected,
 748                                             &num_selections, &select_generation,
 749                                             generation, cur.dinfo->devices,
 750                                             num_devices, matches, num_matches,
 751                                             specified_devices,
 752                                             num_devices_specified, select_mode,
 753                                             maxshowdevs, 0);
 754                         switch (retval) {
 755                         case -1:
 756                                 errx(1, "%s", devstat_errbuf);
 757                                 break;
 758                         case 1:
 759                                 printhdr(maxid, cpumask);
 760                                 break;
 761                         default:
 762                                 break;
 763                         }
 764                 }
 765                 default:
 766                         break;
 767                 }
 768
 769                 fill_vmmeter(&sum);
 770                 fill_vmtotal(&total);
 771                 (void)printf("%1d %1d %1d",
 772                     total.t_rq - 1, total.t_dw + total.t_pw, total.t_sw);
 773 #define vmstat_pgtok(a) ((a) * (sum.v_page_size >> 10))
 774 #define rate(x) (((x) * rate_adj + halfuptime) / uptime)        /* round */
 775                 if (hflag) {
 776                         printf("");
 777                         prthuman(total.t_avm * (u_int64_t)sum.v_page_size, 5);
 778                         printf(" ");
 779                         prthuman(total.t_free * (u_int64_t)sum.v_page_size, 5);
 780                         printf(" ");
 781                         (void)printf("%5lu ",
 782                             (unsigned long)rate(sum.v_vm_faults -
 783                             osum.v_vm_faults));
 784                 } else {
 785                         printf(" %7d", vmstat_pgtok(total.t_avm));
 786                         printf(" %7d ", vmstat_pgtok(total.t_free));
 787                         (void)printf("%4lu ",
 788                             (unsigned long)rate(sum.v_vm_faults -
 789                             osum.v_vm_faults));
 790                 }
 791                 (void)printf("%3lu ",
 792                     (unsigned long)rate(sum.v_reactivated - osum.v_reactivated));
 793                 (void)printf("%3lu ",
 794                     (unsigned long)rate(sum.v_swapin + sum.v_vnodein -
 795                     (osum.v_swapin + osum.v_vnodein)));
 796                 (void)printf("%3lu ",
 797                     (unsigned long)rate(sum.v_swapout + sum.v_vnodeout -
 798                     (osum.v_swapout + osum.v_vnodeout)));
 799                 (void)printf("%5lu ",
 800                     (unsigned long)rate(sum.v_tfree - osum.v_tfree));
 801                 (void)printf("%4lu ",
 802                     (unsigned long)rate(sum.v_pdpages - osum.v_pdpages));
 803                 devstats();
 804                 (void)printf("%4lu %5lu %5lu",
 805                     (unsigned long)rate(sum.v_intr - osum.v_intr),
 806                     (unsigned long)rate(sum.v_syscall - osum.v_syscall),
 807                     (unsigned long)rate(sum.v_swtch - osum.v_swtch));
 808                 if (Pflag)
 809                         pcpustats(ncpus, cpumask, maxid);
 810                 else
 811                         cpustats();
 812                 (void)printf("\n");
 813                 (void)fflush(stdout);
 814                 if (reps >= 0 && --reps <= 0)
 815                         break;
 816                 osum = sum;
 817                 uptime = interval;
 818                 rate_adj = 1000;
 819                 /*
 820                  * We round upward to avoid losing low-frequency events
 821                  * (i.e., >= 1 per interval but < 1 per millisecond).
 822                  */
 823                 if (interval != 1)
 824                         halfuptime = (uptime + 1) / 2;
 825                 else
 826                         halfuptime = 0;
 827                 (void)usleep(interval * 1000);
 828         }
 829 }
 830
 831 static void
 832 printhdr(int maxid, u_long cpumask)
 833 {
 834         int i, num_shown;
 835
 836         num_shown = (num_selected < maxshowdevs) ? num_selected : maxshowdevs;
 837         if (hflag) {
 838                 (void)printf("procs  memory      page%*s ", 19, "");
 839         } else {
 840                 (void)printf("procs     memory       page%*s ", 19, "");
 841         }
 842         if (num_shown > 1)
 843                 (void)printf("   disks %*s", num_shown * 4 - 7, "");
 844         else if (num_shown == 1)
 845                 (void)printf("   disk");
 846         (void)printf("   faults      ");
 847         if (Pflag) {
 848                 for (i = 0; i <= maxid; i++) {
 849                         if (cpumask & (1ul << i))
 850                                 printf("  cpu%d   ", i);
 851                 }
 852                 printf("\n");
 853         } else
 854                 printf("   cpu\n");
 855         if (hflag) {
 856                 (void)printf("r b w  avm   fre   flt  re  pi  po    fr   sr ");
 857         } else {
 858                 (void)printf("r b w     avm     fre  flt  re  pi  po    fr   sr ");
 859         }
 860         for (i = 0; i < num_devices; i++)
 861                 if ((dev_select[i].selected)
 862                  && (dev_select[i].selected <= maxshowdevs))
 863                         (void)printf("%c%c%d ", dev_select[i].device_name[0],
 864                                      dev_select[i].device_name[1],
 865                                      dev_select[i].unit_number);
 866         (void)printf("  in    sy    cs");
 867         if (Pflag) {
 868                 for (i = 0; i <= maxid; i++) {
 869                         if (cpumask & (1ul << i))
 870                                 printf(" us sy id");
 871                 }
 872                 printf("\n");
 873         } else
 874                 printf(" us sy id\n");
 875         if (wresized != 0)
 876                 doresize();
 877         hdrcnt = winlines;
 878 }
 879
 880 /*
 881  * Force a header to be prepended to the next output.
 882  */
 883 static void
 884 needhdr(int dummy __unused)
 885 {
 886
 887         hdrcnt = 1;
 888 }
 889
 890 /*
 891  * When the terminal is resized, force an update of the maximum number of rows
 892  * printed between each header repetition.  Then force a new header to be
 893  * prepended to the next output.
 894  */
 895 void
 896 needresize(int signo)
 897 {
 898
 899         wresized = 1;
 900         hdrcnt = 1;
 901 }
 902
 903 /*
 904  * Update the global `winlines' count of terminal rows.
 905  */
 906 void
 907 doresize(void)
 908 {
 909         int status;
 910         struct winsize w;
 911
 912         for (;;) {
 913                 status = ioctl(fileno(stdout), TIOCGWINSZ, &w);
 914                 if (status == -1 && errno == EINTR)
 915                         continue;
 916                 else if (status == -1)
 917                         err(1, "ioctl");
 918                 if (w.ws_row > 3)
 919                         winlines = w.ws_row - 3;
 920                 else
 921                         winlines = VMSTAT_DEFAULT_LINES;
 922                 break;
 923         }
 924
 925         /*
 926          * Inhibit doresize() calls until we are rescheduled by SIGWINCH.
 927          */
 928         wresized = 0;
 929 }
 930
 931 #ifdef notyet
 932 static void
 933 dotimes(void)
 934 {
 935         unsigned int pgintime, rectime;
 936
 937         kread(X_REC, &rectime, sizeof(rectime));
 938         kread(X_PGIN, &pgintime, sizeof(pgintime));
 939         kread(X_SUM, &sum, sizeof(sum));
 940         (void)printf("%u reclaims, %u total time (usec)\n",
 941             sum.v_pgrec, rectime);
 942         (void)printf("average: %u usec / reclaim\n", rectime / sum.v_pgrec);
 943         (void)printf("\n");
 944         (void)printf("%u page ins, %u total time (msec)\n",
 945             sum.v_pgin, pgintime / 10);
 946         (void)printf("average: %8.1f msec / page in\n",
 947             pgintime / (sum.v_pgin * 10.0));
 948 }
 949 #endif
 950
 951 static long
 952 pct(long top, long bot)
 953 {
 954         long ans;
 955
 956         if (bot == 0)
 957                 return(0);
 958         ans = (quad_t)top * 100 / bot;
 959         return (ans);
 960 }
 961
 962 #define PCT(top, bot) pct((long)(top), (long)(bot))
 963
 964 static void
 965 dosum(void)
 966 {
 967         struct nchstats lnchstats;
 968         long nchtotal;
 969
 970         fill_vmmeter(&sum);
 971         (void)printf("%9u cpu context switches\n", sum.v_swtch);
 972         (void)printf("%9u device interrupts\n", sum.v_intr);
 973         (void)printf("%9u software interrupts\n", sum.v_soft);
 974         (void)printf("%9u traps\n", sum.v_trap);
 975         (void)printf("%9u system calls\n", sum.v_syscall);
 976         (void)printf("%9u kernel threads created\n", sum.v_kthreads);
 977         (void)printf("%9u  fork() calls\n", sum.v_forks);
 978         (void)printf("%9u vfork() calls\n", sum.v_vforks);
 979         (void)printf("%9u rfork() calls\n", sum.v_rforks);
 980         (void)printf("%9u swap pager pageins\n", sum.v_swapin);
 981         (void)printf("%9u swap pager pages paged in\n", sum.v_swappgsin);
 982         (void)printf("%9u swap pager pageouts\n", sum.v_swapout);
 983         (void)printf("%9u swap pager pages paged out\n", sum.v_swappgsout);
 984         (void)printf("%9u vnode pager pageins\n", sum.v_vnodein);
 985         (void)printf("%9u vnode pager pages paged in\n", sum.v_vnodepgsin);
 986         (void)printf("%9u vnode pager pageouts\n", sum.v_vnodeout);
 987         (void)printf("%9u vnode pager pages paged out\n", sum.v_vnodepgsout);
 988         (void)printf("%9u page daemon wakeups\n", sum.v_pdwakeups);
 989         (void)printf("%9u pages examined by the page daemon\n", sum.v_pdpages);
 990         (void)printf("%9u pages reactivated\n", sum.v_reactivated);
 991         (void)printf("%9u copy-on-write faults\n", sum.v_cow_faults);
 992         (void)printf("%9u copy-on-write optimized faults\n", sum.v_cow_optim);
 993         (void)printf("%9u zero fill pages zeroed\n", sum.v_zfod);
 994         (void)printf("%9u zero fill pages prezeroed\n", sum.v_ozfod);
 995         (void)printf("%9u intransit blocking page faults\n", sum.v_intrans);
 996         (void)printf("%9u total VM faults taken\n", sum.v_vm_faults);
 997         (void)printf("%9u page faults requiring I/O\n", sum.v_io_faults);
 998         (void)printf("%9u pages affected by kernel thread creation\n",
 999             sum.v_kthreadpages);
1000         (void)printf("%9u pages affected by  fork()\n", sum.v_forkpages);
1001         (void)printf("%9u pages affected by vfork()\n", sum.v_vforkpages);
1002         (void)printf("%9u pages affected by rfork()\n", sum.v_rforkpages);
1003         (void)printf("%9u pages cached\n", sum.v_tcached);
1004         (void)printf("%9u pages freed\n", sum.v_tfree);
1005         (void)printf("%9u pages freed by daemon\n", sum.v_dfree);
1006         (void)printf("%9u pages freed by exiting processes\n", sum.v_pfree);
1007         (void)printf("%9u pages active\n", sum.v_active_count);
1008         (void)printf("%9u pages inactive\n", sum.v_inactive_count);
1009         (void)printf("%9u pages in VM cache\n", sum.v_cache_count);
1010         (void)printf("%9u pages wired down\n", sum.v_wire_count);
1011         (void)printf("%9u pages free\n", sum.v_free_count);
1012         (void)printf("%9u bytes per page\n", sum.v_page_size);
1013         if (kd != NULL) {
1014                 kread(X_NCHSTATS, &lnchstats, sizeof(lnchstats));
1015         } else {
1016                 size_t size = sizeof(lnchstats);
1017                 mysysctl("vfs.cache.nchstats", &lnchstats, &size, NULL, 0);
1018                 if (size != sizeof(lnchstats))
1019                         errx(1, "vfs.cache.nchstats size mismatch");
1020         }
1021         nchtotal = lnchstats.ncs_goodhits + lnchstats.ncs_neghits +
1022             lnchstats.ncs_badhits + lnchstats.ncs_falsehits +
1023             lnchstats.ncs_miss + lnchstats.ncs_long;
1024         (void)printf("%9ld total name lookups\n", nchtotal);
1025         (void)printf(
1026             "%9s cache hits (%ld%% pos + %ld%% neg) system %ld%% per-directory\n",
1027             "", PCT(lnchstats.ncs_goodhits, nchtotal),
1028             PCT(lnchstats.ncs_neghits, nchtotal),
1029             PCT(lnchstats.ncs_pass2, nchtotal));
1030         (void)printf("%9s deletions %ld%%, falsehits %ld%%, toolong %ld%%\n", "",
1031             PCT(lnchstats.ncs_badhits, nchtotal),
1032             PCT(lnchstats.ncs_falsehits, nchtotal),
1033             PCT(lnchstats.ncs_long, nchtotal));
1034 }
1035
1036 static void
1037 doforkst(void)
1038 {
1039         fill_vmmeter(&sum);
1040         (void)printf("%u forks, %u pages, average %.2f\n",
1041             sum.v_forks, sum.v_forkpages,
1042             sum.v_forks == 0 ? 0.0 :
1043             (double)sum.v_forkpages / sum.v_forks);
1044         (void)printf("%u vforks, %u pages, average %.2f\n",
1045             sum.v_vforks, sum.v_vforkpages,
1046             sum.v_vforks == 0 ? 0.0 :
1047             (double)sum.v_vforkpages / sum.v_vforks);
1048         (void)printf("%u rforks, %u pages, average %.2f\n",
1049             sum.v_rforks, sum.v_rforkpages,
1050             sum.v_rforks == 0 ? 0.0 :
1051             (double)sum.v_rforkpages / sum.v_rforks);
1052 }
1053
1054 static void
1055 devstats(void)
1056 {
1057         int dn, state;
1058         long double transfers_per_second;
1059         long double busy_seconds;
1060         long tmp;
1061
1062         for (state = 0; state < CPUSTATES; ++state) {
1063                 tmp = cur.cp_time[state];
1064                 cur.cp_time[state] -= last.cp_time[state];
1065                 last.cp_time[state] = tmp;
1066         }
1067
1068         busy_seconds = cur.snap_time - last.snap_time;
1069
1070         for (dn = 0; dn < num_devices; dn++) {
1071                 int di;
1072
1073                 if ((dev_select[dn].selected == 0)
1074                  || (dev_select[dn].selected > maxshowdevs))
1075                         continue;
1076
1077                 di = dev_select[dn].position;
1078
1079                 if (devstat_compute_statistics(&cur.dinfo->devices[di],
1080                     &last.dinfo->devices[di], busy_seconds,
1081                     DSM_TRANSFERS_PER_SECOND, &transfers_per_second,
1082                     DSM_NONE) != 0)
1083                         errx(1, "%s", devstat_errbuf);
1084
1085                 (void)printf("%3.0Lf ", transfers_per_second);
1086         }
1087 }
1088
1089 static void
1090 percent(double pct, int *over)
1091 {
1092         char buf[10];
1093         int l;
1094
1095         l = snprintf(buf, sizeof(buf), "%.0f", pct);
1096         if (l == 1 && *over) {
1097                 printf("%s",  buf);
1098                 (*over)--;
1099         } else
1100                 printf("%2s", buf);
1101         if (l > 2)
1102                 (*over)++;
1103 }
1104
1105 static void
1106 cpustats(void)
1107 {
1108         int state, over;
1109         double lpct, total;
1110
1111         total = 0;
1112         for (state = 0; state < CPUSTATES; ++state)
1113                 total += cur.cp_time[state];
1114         if (total)
1115                 lpct = 100.0 / total;
1116         else
1117                 lpct = 0.0;
1118         over = 0;
1119         printf(" ");
1120         percent((cur.cp_time[CP_USER] + cur.cp_time[CP_NICE]) * lpct, &over);
1121         printf(" ");
1122         percent((cur.cp_time[CP_SYS] + cur.cp_time[CP_INTR]) * lpct, &over);
1123         printf(" ");
1124         percent(cur.cp_time[CP_IDLE] * lpct, &over);
1125 }
1126
1127 static void
1128 pcpustats(int ncpus, u_long cpumask, int maxid)
1129 {
1130         int state, i;
1131         double lpct, total;
1132         long tmp;
1133         int over;
1134
1135         /* devstats does this for cp_time */
1136         for (i = 0; i <= maxid; i++) {
1137                 if ((cpumask & (1ul << i)) == 0)
1138                         continue;
1139                 for (state = 0; state < CPUSTATES; ++state) {
1140                         tmp = cur_cp_times[i * CPUSTATES + state];
1141                         cur_cp_times[i * CPUSTATES + state] -= last_cp_times[i *
1142                             CPUSTATES + state];
1143                         last_cp_times[i * CPUSTATES + state] = tmp;
1144                 }
1145         }
1146
1147         over = 0;
1148         for (i = 0; i <= maxid; i++) {
1149                 if ((cpumask & (1ul << i)) == 0)
1150                         continue;
1151                 total = 0;
1152                 for (state = 0; state < CPUSTATES; ++state)
1153                         total += cur_cp_times[i * CPUSTATES + state];
1154                 if (total)
1155                         lpct = 100.0 / total;
1156                 else
1157                         lpct = 0.0;
1158                 printf(" ");
1159                 percent((cur_cp_times[i * CPUSTATES + CP_USER] +
1160                          cur_cp_times[i * CPUSTATES + CP_NICE]) * lpct, &over);
1161                 printf(" ");
1162                 percent((cur_cp_times[i * CPUSTATES + CP_SYS] +
1163                          cur_cp_times[i * CPUSTATES + CP_INTR]) * lpct, &over);
1164                 printf(" ");
1165                 percent(cur_cp_times[i * CPUSTATES + CP_IDLE] * lpct, &over);
1166         }
1167 }
1168
1169 static unsigned int
1170 read_intrcnts(unsigned long **intrcnts)
1171 {
1172         size_t intrcntlen;
1173
1174         if (kd != NULL) {
1175                 kread(X_SINTRCNT, &intrcntlen, sizeof(intrcntlen));
1176                 if ((*intrcnts = malloc(intrcntlen)) == NULL)
1177                         err(1, "malloc()");
1178                 kread(X_INTRCNT, *intrcnts, intrcntlen);
1179         } else {
1180                 for (*intrcnts = NULL, intrcntlen = 1024; ; intrcntlen *= 2) {
1181                         *intrcnts = reallocf(*intrcnts, intrcntlen);
1182                         if (*intrcnts == NULL)
1183                                 err(1, "reallocf()");
1184                         if (mysysctl("hw.intrcnt",
1185                             *intrcnts, &intrcntlen, NULL, 0) == 0)
1186                                 break;
1187                 }
1188         }
1189
1190         return (intrcntlen / sizeof(unsigned long));
1191 }
1192
1193 static void
1194 print_intrcnts(unsigned long *intrcnts, unsigned long *old_intrcnts,
1195                 char *intrnames, unsigned int nintr,
1196                 size_t istrnamlen, long long period_ms)
1197 {
1198         unsigned long *intrcnt, *old_intrcnt;
1199         uint64_t inttotal, old_inttotal, total_count, total_rate;
1200         char* intrname;
1201         unsigned int i;
1202
1203         inttotal = 0;
1204         old_inttotal = 0;
1205         intrname = intrnames;
1206         for (i = 0, intrcnt=intrcnts, old_intrcnt=old_intrcnts; i < nintr; i++) {
1207                 if (intrname[0] != '\0' && (*intrcnt != 0 || aflag)) {
1208                         unsigned long count, rate;
1209
1210                         count = *intrcnt - *old_intrcnt;
1211                         rate = (count * 1000 + period_ms / 2) / period_ms;
1212                         (void)printf("%-*s %20lu %10lu\n", (int)istrnamlen,
1213                             intrname, count, rate);
1214                 }
1215                 intrname += strlen(intrname) + 1;
1216                 inttotal += *intrcnt++;
1217                 old_inttotal += *old_intrcnt++;
1218         }
1219         total_count = inttotal - old_inttotal;
1220         total_rate = (total_count * 1000 + period_ms / 2) / period_ms;
1221         (void)printf("%-*s %20" PRIu64 " %10" PRIu64 "\n", (int)istrnamlen,
1222             "Total", total_count, total_rate);
1223 }
1224
1225 static void
1226 dointr(unsigned int interval, int reps)
1227 {
1228         unsigned long *intrcnts;
1229         long long uptime, period_ms;
1230         unsigned long *old_intrcnts = NULL;
1231         size_t clen, inamlen, istrnamlen;
1232         char *intrnames, *intrname;
1233
1234         uptime = getuptime();
1235
1236         /* Get the names of each interrupt source */
1237         if (kd != NULL) {
1238                 kread(X_SINTRNAMES, &inamlen, sizeof(inamlen));
1239                 if ((intrnames = malloc(inamlen)) == NULL)
1240                         err(1, "malloc()");
1241                 kread(X_INTRNAMES, intrnames, inamlen);
1242         } else {
1243                 for (intrnames = NULL, inamlen = 1024; ; inamlen *= 2) {
1244                         if ((intrnames = reallocf(intrnames, inamlen)) == NULL)
1245                                 err(1, "reallocf()");
1246                         if (mysysctl("hw.intrnames",
1247                             intrnames, &inamlen, NULL, 0) == 0)
1248                                 break;
1249                 }
1250         }
1251
1252         /* Determine the length of the longest interrupt name */
1253         intrname = intrnames;
1254         istrnamlen = strlen("interrupt");
1255         while(*intrname != '\0') {
1256                 clen = strlen(intrname);
1257                 if (clen > istrnamlen)
1258                         istrnamlen = clen;
1259                 intrname += strlen(intrname) + 1;
1260         }
1261         (void)printf("%-*s %20s %10s\n", (int)istrnamlen, "interrupt", "total",
1262             "rate");
1263
1264         /*
1265          * Loop reps times printing differential interrupt counts.  If reps is
1266          * zero, then run just once, printing total counts
1267          */
1268         period_ms = uptime / 1000000;
1269         while(1) {
1270                 unsigned int nintr;
1271                 long long old_uptime;
1272
1273                 nintr = read_intrcnts(&intrcnts);
1274                 /*
1275                  * Initialize old_intrcnts to 0 for the first pass, so
1276                  * print_intrcnts will print total interrupts since boot
1277                  */
1278                 if (old_intrcnts == NULL) {
1279                         old_intrcnts = calloc(nintr, sizeof(unsigned long));
1280                         if (old_intrcnts == NULL)
1281                                 err(1, "calloc()");
1282                 }
1283
1284                 print_intrcnts(intrcnts, old_intrcnts, intrnames, nintr,
1285                     istrnamlen, period_ms);
1286
1287                 free(old_intrcnts);
1288                 old_intrcnts = intrcnts;
1289                 if (reps >= 0 && --reps <= 0)
1290                         break;
1291                 usleep(interval * 1000);
1292                 old_uptime = uptime;
1293                 uptime = getuptime();
1294                 period_ms = (uptime - old_uptime) / 1000000;
1295         }
1296 }
1297
1298 static void
1299 domemstat_malloc(void)
1300 {
1301         struct memory_type_list *mtlp;
1302         struct memory_type *mtp;
1303         int error, first, i;
1304
1305         mtlp = memstat_mtl_alloc();
1306         if (mtlp == NULL) {
1307                 warn("memstat_mtl_alloc");
1308                 return;
1309         }
1310         if (kd == NULL) {
1311                 if (memstat_sysctl_malloc(mtlp, 0) < 0) {
1312                         warnx("memstat_sysctl_malloc: %s",
1313                             memstat_strerror(memstat_mtl_geterror(mtlp)));
1314                         return;
1315                 }
1316         } else {
1317                 if (memstat_kvm_malloc(mtlp, kd) < 0) {
1318                         error = memstat_mtl_geterror(mtlp);
1319                         if (error == MEMSTAT_ERROR_KVM)
1320                                 warnx("memstat_kvm_malloc: %s",
1321                                     kvm_geterr(kd));
1322                         else
1323                                 warnx("memstat_kvm_malloc: %s",
1324                                     memstat_strerror(error));
1325                 }
1326         }
1327         printf("%13s %5s %6s %7s %8s  Size(s)\n", "Type", "InUse", "MemUse",
1328             "HighUse", "Requests");
1329         for (mtp = memstat_mtl_first(mtlp); mtp != NULL;
1330             mtp = memstat_mtl_next(mtp)) {
1331                 if (memstat_get_numallocs(mtp) == 0 &&
1332                     memstat_get_count(mtp) == 0)
1333                         continue;
1334                 printf("%13s %5" PRIu64 " %5" PRIu64 "K %7s %8" PRIu64 "  ",
1335                     memstat_get_name(mtp), memstat_get_count(mtp),
1336                     (memstat_get_bytes(mtp) + 1023) / 1024, "-",
1337                     memstat_get_numallocs(mtp));
1338                 first = 1;
1339                 for (i = 0; i < 32; i++) {
1340                         if (memstat_get_sizemask(mtp) & (1 << i)) {
1341                                 if (!first)
1342                                         printf(",");
1343                                 printf("%d", 1 << (i + 4));
1344                                 first = 0;
1345                         }
1346                 }
1347                 printf("\n");
1348         }
1349         memstat_mtl_free(mtlp);
1350 }
1351
1352 static void
1353 domemstat_zone(void)
1354 {
1355         struct memory_type_list *mtlp;
1356         struct memory_type *mtp;
1357         char name[MEMTYPE_MAXNAME + 1];
1358         int error;
1359
1360         mtlp = memstat_mtl_alloc();
1361         if (mtlp == NULL) {
1362                 warn("memstat_mtl_alloc");
1363                 return;
1364         }
1365         if (kd == NULL) {
1366                 if (memstat_sysctl_uma(mtlp, 0) < 0) {
1367                         warnx("memstat_sysctl_uma: %s",
1368                             memstat_strerror(memstat_mtl_geterror(mtlp)));
1369                         return;
1370                 }
1371         } else {
1372                 if (memstat_kvm_uma(mtlp, kd) < 0) {
1373                         error = memstat_mtl_geterror(mtlp);
1374                         if (error == MEMSTAT_ERROR_KVM)
1375                                 warnx("memstat_kvm_uma: %s",
1376                                     kvm_geterr(kd));
1377                         else
1378                                 warnx("memstat_kvm_uma: %s",
1379                                     memstat_strerror(error));
1380                 }
1381         }
1382         printf("%-20s %6s %6s %8s %8s %8s %4s %4s\n\n", "ITEM", "SIZE",
1383             "LIMIT", "USED", "FREE", "REQ", "FAIL", "SLEEP");
1384         for (mtp = memstat_mtl_first(mtlp); mtp != NULL;
1385             mtp = memstat_mtl_next(mtp)) {
1386                 strlcpy(name, memstat_get_name(mtp), MEMTYPE_MAXNAME);
1387                 strcat(name, ":");
1388                 printf("%-20s %6" PRIu64 ", %6" PRIu64 ",%8" PRIu64 ",%8" PRIu64
1389                     ",%8" PRIu64 ",%4" PRIu64 ",%4" PRIu64 "\n", name,
1390                     memstat_get_size(mtp), memstat_get_countlimit(mtp),
1391                     memstat_get_count(mtp), memstat_get_free(mtp),
1392                     memstat_get_numallocs(mtp), memstat_get_failures(mtp),
1393                     memstat_get_sleeps(mtp));
1394         }
1395         memstat_mtl_free(mtlp);
1396         printf("\n");
1397 }
1398
1399 /*
1400  * kread reads something from the kernel, given its nlist index.
1401  */
1402 static void
1403 kreado(int nlx, void *addr, size_t size, size_t offset)
1404 {
1405         const char *sym;
1406
1407         if (namelist[nlx].n_type == 0 || namelist[nlx].n_value == 0) {
1408                 sym = namelist[nlx].n_name;
1409                 if (*sym == '_')
1410                         ++sym;
1411                 errx(1, "symbol %s not defined", sym);
1412         }
1413         if ((size_t)kvm_read(kd, namelist[nlx].n_value + offset, addr,
1414             size) != size) {
1415                 sym = namelist[nlx].n_name;
1416                 if (*sym == '_')
1417                         ++sym;
1418                 errx(1, "%s: %s", sym, kvm_geterr(kd));
1419         }
1420 }
1421
1422 static void
1423 kread(int nlx, void *addr, size_t size)
1424 {
1425         kreado(nlx, addr, size, 0);
1426 }
1427
1428 static char *
1429 kgetstr(const char *strp)
1430 {
1431         int n = 0, size = 1;
1432         char *ret = NULL;
1433
1434         do {
1435                 if (size == n + 1) {
1436                         ret = realloc(ret, size);
1437                         if (ret == NULL)
1438                                 err(1, "%s: realloc", __func__);
1439                         size *= 2;
1440                 }
1441                 if (kvm_read(kd, (u_long)strp + n, &ret[n], 1) != 1)
1442                         errx(1, "%s: %s", __func__, kvm_geterr(kd));
1443         } while (ret[n++] != '\0');
1444         return (ret);
1445 }
1446
1447 static void
1448 usage(void)
1449 {
1450         (void)fprintf(stderr, "%s%s",
1451                 "usage: vmstat [-afHhimPsz] [-M core [-N system]] [-c count] [-n devs]\n",
1452                 "              [-p type,if,pass] [-w wait] [disks] [wait [count]]\n");
1453         exit(1);
1454 }