usr.bin/vmstat/vmstat.c

   1 /*
   2  * Copyright (c) 1980, 1986, 1991, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #ifndef lint
  35 static const char copyright[] =
  36 "@(#) Copyright (c) 1980, 1986, 1991, 1993\n\
  37         The Regents of the University of California.  All rights reserved.\n";
  38 #endif /* not lint */
  39
  40 #if 0
  41 #ifndef lint
  42 static char sccsid[] = "@(#)vmstat.c    8.1 (Berkeley) 6/6/93";
  43 #endif /* not lint */
  44 #endif
  45
  46 #include <sys/cdefs.h>
  47 __FBSDID("$FreeBSD$");
  48
  49 #include <sys/param.h>
  50 #include <sys/time.h>
  51 #include <sys/proc.h>
  52 #include <sys/uio.h>
  53 #include <sys/namei.h>
  54 #include <sys/malloc.h>
  55 #include <sys/signal.h>
  56 #include <sys/fcntl.h>
  57 #include <sys/ioctl.h>
  58 #include <sys/resource.h>
  59 #include <sys/sysctl.h>
  60 #include <sys/vmmeter.h>
  61 #include <sys/pcpu.h>
  62
  63 #include <vm/vm_param.h>
  64
  65 #include <ctype.h>
  66 #include <devstat.h>
  67 #include <err.h>
  68 #include <errno.h>
  69 #include <kvm.h>
  70 #include <limits.h>
  71 #include <memstat.h>
  72 #include <nlist.h>
  73 #include <paths.h>
  74 #include <stdio.h>
  75 #include <stdlib.h>
  76 #include <string.h>
  77 #include <sysexits.h>
  78 #include <time.h>
  79 #include <unistd.h>
  80 #include <libutil.h>
  81
  82 static char da[] = "da";
  83
  84 static struct nlist namelist[] = {
  85 #define X_SUM           0
  86         { "_cnt" },
  87 #define X_BOOTTIME      1
  88         { "_boottime" },
  89 #define X_HZ            2
  90         { "_hz" },
  91 #define X_STATHZ        3
  92         { "_stathz" },
  93 #define X_NCHSTATS      4
  94         { "_nchstats" },
  95 #define X_INTRNAMES     5
  96         { "_intrnames" },
  97 #define X_EINTRNAMES    6
  98         { "_eintrnames" },
  99 #define X_INTRCNT       7
 100         { "_intrcnt" },
 101 #define X_EINTRCNT      8
 102         { "_eintrcnt" },
 103 #define X_KMEMSTATS     9
 104         { "_kmemstatistics" },
 105 #define X_KMEMZONES     10
 106         { "_kmemzones" },
 107 #ifdef notyet
 108 #define X_DEFICIT       XXX
 109         { "_deficit" },
 110 #define X_REC           XXX
 111         { "_rectime" },
 112 #define X_PGIN          XXX
 113         { "_pgintime" },
 114 #define X_XSTATS        XXX
 115         { "_xstats" },
 116 #define X_END           XXX
 117 #else
 118 #define X_END           11
 119 #endif
 120         { "" },
 121 };
 122
 123 static struct statinfo cur, last;
 124 static int num_devices, maxshowdevs;
 125 static long generation;
 126 static struct device_selection *dev_select;
 127 static int num_selected;
 128 static struct devstat_match *matches;
 129 static int num_matches = 0;
 130 static int num_devices_specified, num_selections;
 131 static long select_generation;
 132 static char **specified_devices;
 133 static devstat_select_mode select_mode;
 134
 135 static struct   vmmeter sum, osum;
 136
 137 #define VMSTAT_DEFAULT_LINES    20      /* Default number of `winlines'. */
 138 volatile sig_atomic_t wresized;         /* Tty resized, when non-zero. */
 139 static int winlines = VMSTAT_DEFAULT_LINES; /* Current number of tty rows. */
 140
 141 static int      aflag;
 142 static int      nflag;
 143 static int      Pflag;
 144 static int      hflag;
 145
 146 static kvm_t   *kd;
 147
 148 #define FORKSTAT        0x01
 149 #define INTRSTAT        0x02
 150 #define MEMSTAT         0x04
 151 #define SUMSTAT         0x08
 152 #define TIMESTAT        0x10
 153 #define VMSTAT          0x20
 154 #define ZMEMSTAT        0x40
 155
 156 static void     cpustats(void);
 157 static void     pcpustats(int, u_long, int);
 158 static void     devstats(void);
 159 static void     doforkst(void);
 160 static void     dointr(void);
 161 static void     dosum(void);
 162 static void     dovmstat(unsigned int, int);
 163 static void     domemstat_malloc(void);
 164 static void     domemstat_zone(void);
 165 static void     kread(int, void *, size_t);
 166 static void     kreado(int, void *, size_t, size_t);
 167 static char    *kgetstr(const char *);
 168 static void     needhdr(int);
 169 static void     needresize(int);
 170 static void     doresize(void);
 171 static void     printhdr(int, u_long);
 172 static void     usage(void);
 173
 174 static long     pct(long, long);
 175 static long     getuptime(void);
 176
 177 static char   **getdrivedata(char **);
 178
 179 int
 180 main(int argc, char *argv[])
 181 {
 182         int c, todo;
 183         unsigned int interval;
 184         int reps;
 185         char *memf, *nlistf;
 186         char errbuf[_POSIX2_LINE_MAX];
 187
 188         memf = nlistf = NULL;
 189         interval = reps = todo = 0;
 190         maxshowdevs = 2;
 191         hflag = isatty(1);
 192         while ((c = getopt(argc, argv, "ac:fhHiM:mN:n:Pp:stw:z")) != -1) {
 193                 switch (c) {
 194                 case 'a':
 195                         aflag++;
 196                         break;
 197                 case 'c':
 198                         reps = atoi(optarg);
 199                         break;
 200                 case 'P':
 201                         Pflag++;
 202                         break;
 203                 case 'f':
 204                         todo |= FORKSTAT;
 205                         break;
 206                 case 'h':
 207                         hflag = 1;
 208                         break;
 209                 case 'H':
 210                         hflag = 0;
 211                         break;
 212                 case 'i':
 213                         todo |= INTRSTAT;
 214                         break;
 215                 case 'M':
 216                         memf = optarg;
 217                         break;
 218                 case 'm':
 219                         todo |= MEMSTAT;
 220                         break;
 221                 case 'N':
 222                         nlistf = optarg;
 223                         break;
 224                 case 'n':
 225                         nflag = 1;
 226                         maxshowdevs = atoi(optarg);
 227                         if (maxshowdevs < 0)
 228                                 errx(1, "number of devices %d is < 0",
 229                                      maxshowdevs);
 230                         break;
 231                 case 'p':
 232                         if (devstat_buildmatch(optarg, &matches, &num_matches) != 0)
 233                                 errx(1, "%s", devstat_errbuf);
 234                         break;
 235                 case 's':
 236                         todo |= SUMSTAT;
 237                         break;
 238                 case 't':
 239 #ifdef notyet
 240                         todo |= TIMESTAT;
 241 #else
 242                         errx(EX_USAGE, "sorry, -t is not (re)implemented yet");
 243 #endif
 244                         break;
 245                 case 'w':
 246                         interval = atoi(optarg);
 247                         break;
 248                 case 'z':
 249                         todo |= ZMEMSTAT;
 250                         break;
 251                 case '?':
 252                 default:
 253                         usage();
 254                 }
 255         }
 256         argc -= optind;
 257         argv += optind;
 258
 259         if (todo == 0)
 260                 todo = VMSTAT;
 261
 262         if (memf != NULL) {
 263                 kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf);
 264                 if (kd == NULL)
 265                         errx(1, "kvm_openfiles: %s", errbuf);
 266         }
 267
 268         if (kd != NULL && (c = kvm_nlist(kd, namelist)) != 0) {
 269                 if (c > 0) {
 270                         warnx("undefined symbols:");
 271                         for (c = 0;
 272                              c < (int)(sizeof(namelist)/sizeof(namelist[0]));
 273                              c++)
 274                                 if (namelist[c].n_type == 0)
 275                                         (void)fprintf(stderr, " %s",
 276                                             namelist[c].n_name);
 277                         (void)fputc('\n', stderr);
 278                 } else
 279                         warnx("kvm_nlist: %s", kvm_geterr(kd));
 280                 exit(1);
 281         }
 282         if (kd && Pflag)
 283                 errx(1, "Cannot use -P with crash dumps");
 284
 285         if (todo & VMSTAT) {
 286                 /*
 287                  * Make sure that the userland devstat version matches the
 288                  * kernel devstat version.  If not, exit and print a
 289                  * message informing the user of his mistake.
 290                  */
 291                 if (devstat_checkversion(NULL) < 0)
 292                         errx(1, "%s", devstat_errbuf);
 293
 294
 295                 argv = getdrivedata(argv);
 296         }
 297
 298 #define BACKWARD_COMPATIBILITY
 299 #ifdef  BACKWARD_COMPATIBILITY
 300         if (*argv) {
 301                 interval = atoi(*argv);
 302                 if (*++argv)
 303                         reps = atoi(*argv);
 304         }
 305 #endif
 306
 307         if (interval) {
 308                 if (!reps)
 309                         reps = -1;
 310         } else if (reps)
 311                 interval = 1;
 312
 313         if (todo & FORKSTAT)
 314                 doforkst();
 315         if (todo & MEMSTAT)
 316                 domemstat_malloc();
 317         if (todo & ZMEMSTAT)
 318                 domemstat_zone();
 319         if (todo & SUMSTAT)
 320                 dosum();
 321 #ifdef notyet
 322         if (todo & TIMESTAT)
 323                 dotimes();
 324 #endif
 325         if (todo & INTRSTAT)
 326                 dointr();
 327         if (todo & VMSTAT)
 328                 dovmstat(interval, reps);
 329         exit(0);
 330 }
 331
 332 static int
 333 mysysctl(const char *name, void *oldp, size_t *oldlenp,
 334     void *newp, size_t newlen)
 335 {
 336         int error;
 337
 338         error = sysctlbyname(name, oldp, oldlenp, newp, newlen);
 339         if (error != 0 && errno != ENOMEM)
 340                 err(1, "sysctl(%s)", name);
 341         return (error);
 342 }
 343
 344 static char **
 345 getdrivedata(char **argv)
 346 {
 347         if ((num_devices = devstat_getnumdevs(NULL)) < 0)
 348                 errx(1, "%s", devstat_errbuf);
 349
 350         cur.dinfo = (struct devinfo *)calloc(1, sizeof(struct devinfo));
 351         last.dinfo = (struct devinfo *)calloc(1, sizeof(struct devinfo));
 352
 353         if (devstat_getdevs(NULL, &cur) == -1)
 354                 errx(1, "%s", devstat_errbuf);
 355
 356         num_devices = cur.dinfo->numdevs;
 357         generation = cur.dinfo->generation;
 358
 359         specified_devices = (char **)malloc(sizeof(char *));
 360         for (num_devices_specified = 0; *argv; ++argv) {
 361                 if (isdigit(**argv))
 362                         break;
 363                 num_devices_specified++;
 364                 specified_devices = (char **)realloc(specified_devices,
 365                                                      sizeof(char *) *
 366                                                      num_devices_specified);
 367                 specified_devices[num_devices_specified - 1] = *argv;
 368         }
 369         dev_select = NULL;
 370
 371         if (nflag == 0 && maxshowdevs < num_devices_specified)
 372                         maxshowdevs = num_devices_specified;
 373
 374         /*
 375          * People are generally only interested in disk statistics when
 376          * they're running vmstat.  So, that's what we're going to give
 377          * them if they don't specify anything by default.  We'll also give
 378          * them any other random devices in the system so that we get to
 379          * maxshowdevs devices, if that many devices exist.  If the user
 380          * specifies devices on the command line, either through a pattern
 381          * match or by naming them explicitly, we will give the user only
 382          * those devices.
 383          */
 384         if ((num_devices_specified == 0) && (num_matches == 0)) {
 385                 if (devstat_buildmatch(da, &matches, &num_matches) != 0)
 386                         errx(1, "%s", devstat_errbuf);
 387
 388                 select_mode = DS_SELECT_ADD;
 389         } else
 390                 select_mode = DS_SELECT_ONLY;
 391
 392         /*
 393          * At this point, selectdevs will almost surely indicate that the
 394          * device list has changed, so we don't look for return values of 0
 395          * or 1.  If we get back -1, though, there is an error.
 396          */
 397         if (devstat_selectdevs(&dev_select, &num_selected, &num_selections,
 398                        &select_generation, generation, cur.dinfo->devices,
 399                        num_devices, matches, num_matches, specified_devices,
 400                        num_devices_specified, select_mode,
 401                        maxshowdevs, 0) == -1)
 402                 errx(1, "%s", devstat_errbuf);
 403
 404         return(argv);
 405 }
 406
 407 static long
 408 getuptime(void)
 409 {
 410         struct timespec sp;
 411         time_t uptime;
 412
 413         (void)clock_gettime(CLOCK_MONOTONIC, &sp);
 414         uptime = sp.tv_sec;
 415         if (uptime <= 0 || uptime > 60*60*24*365*10)
 416                 errx(1, "time makes no sense; namelist must be wrong");
 417
 418         return(uptime);
 419 }
 420
 421 static void
 422 fill_pcpu(struct pcpu ***pcpup, int* maxcpup)
 423 {
 424         struct pcpu **pcpu;
 425
 426         int maxcpu, size, i;
 427
 428         *pcpup = NULL;
 429
 430         if (kd == NULL)
 431                 return;
 432
 433         maxcpu = kvm_getmaxcpu(kd);
 434         if (maxcpu < 0)
 435                 errx(1, "kvm_getmaxcpu: %s", kvm_geterr(kd));
 436
 437         pcpu = calloc(maxcpu, sizeof(struct pcpu *));
 438         if (pcpu == NULL)
 439                 err(1, "calloc");
 440
 441         for (i = 0; i < maxcpu; i++) {
 442                 pcpu[i] = kvm_getpcpu(kd, i);
 443                 if (pcpu[i] == (struct pcpu *)-1)
 444                         errx(1, "kvm_getpcpu: %s", kvm_geterr(kd));
 445         }
 446
 447         *maxcpup = maxcpu;
 448         *pcpup = pcpu;
 449 }
 450
 451 static void
 452 free_pcpu(struct pcpu **pcpu, int maxcpu)
 453 {
 454         int i;
 455
 456         for (i = 0; i < maxcpu; i++)
 457                 free(pcpu[i]);
 458         free(pcpu);
 459 }
 460
 461 static void
 462 fill_vmmeter(struct vmmeter *vmmp)
 463 {
 464         struct pcpu **pcpu;
 465         int maxcpu, i;
 466
 467         if (kd != NULL) {
 468                 kread(X_SUM, vmmp, sizeof(*vmmp));
 469                 fill_pcpu(&pcpu, &maxcpu);
 470                 for (i = 0; i < maxcpu; i++) {
 471                         if (pcpu[i] == NULL)
 472                                 continue;
 473 #define ADD_FROM_PCPU(i, name) \
 474                         vmmp->name += pcpu[i]->pc_cnt.name
 475                         ADD_FROM_PCPU(i, v_swtch);
 476                         ADD_FROM_PCPU(i, v_trap);
 477                         ADD_FROM_PCPU(i, v_syscall);
 478                         ADD_FROM_PCPU(i, v_intr);
 479                         ADD_FROM_PCPU(i, v_soft);
 480                         ADD_FROM_PCPU(i, v_vm_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_cow_faults);
 520                 GET_VM_STATS(vm, v_cow_optim);
 521                 GET_VM_STATS(vm, v_zfod);
 522                 GET_VM_STATS(vm, v_ozfod);
 523                 GET_VM_STATS(vm, v_swapin);
 524                 GET_VM_STATS(vm, v_swapout);
 525                 GET_VM_STATS(vm, v_swappgsin);
 526                 GET_VM_STATS(vm, v_swappgsout);
 527                 GET_VM_STATS(vm, v_vnodein);
 528                 GET_VM_STATS(vm, v_vnodeout);
 529                 GET_VM_STATS(vm, v_vnodepgsin);
 530                 GET_VM_STATS(vm, v_vnodepgsout);
 531                 GET_VM_STATS(vm, v_intrans);
 532                 GET_VM_STATS(vm, v_reactivated);
 533                 GET_VM_STATS(vm, v_pdwakeups);
 534                 GET_VM_STATS(vm, v_pdpages);
 535                 GET_VM_STATS(vm, v_tcached);
 536                 GET_VM_STATS(vm, v_dfree);
 537                 GET_VM_STATS(vm, v_pfree);
 538                 GET_VM_STATS(vm, v_tfree);
 539                 GET_VM_STATS(vm, v_page_size);
 540                 GET_VM_STATS(vm, v_page_count);
 541                 GET_VM_STATS(vm, v_free_reserved);
 542                 GET_VM_STATS(vm, v_free_target);
 543                 GET_VM_STATS(vm, v_free_min);
 544                 GET_VM_STATS(vm, v_free_count);
 545                 GET_VM_STATS(vm, v_wire_count);
 546                 GET_VM_STATS(vm, v_active_count);
 547                 GET_VM_STATS(vm, v_inactive_target);
 548                 GET_VM_STATS(vm, v_inactive_count);
 549                 GET_VM_STATS(vm, v_cache_count);
 550                 GET_VM_STATS(vm, v_cache_min);
 551                 GET_VM_STATS(vm, v_cache_max);
 552                 GET_VM_STATS(vm, v_pageout_free_min);
 553                 GET_VM_STATS(vm, v_interrupt_free_min);
 554                 /*GET_VM_STATS(vm, v_free_severe);*/
 555                 GET_VM_STATS(vm, v_forks);
 556                 GET_VM_STATS(vm, v_vforks);
 557                 GET_VM_STATS(vm, v_rforks);
 558                 GET_VM_STATS(vm, v_kthreads);
 559                 GET_VM_STATS(vm, v_forkpages);
 560                 GET_VM_STATS(vm, v_vforkpages);
 561                 GET_VM_STATS(vm, v_rforkpages);
 562                 GET_VM_STATS(vm, v_kthreadpages);
 563 #undef GET_VM_STATS
 564         }
 565 }
 566
 567 static void
 568 fill_vmtotal(struct vmtotal *vmtp)
 569 {
 570         if (kd != NULL) {
 571                 /* XXX fill vmtp */
 572                 errx(1, "not implemented");
 573         } else {
 574                 size_t size = sizeof(*vmtp);
 575                 mysysctl("vm.vmtotal", vmtp, &size, NULL, 0);
 576                 if (size != sizeof(*vmtp))
 577                         errx(1, "vm.total size mismatch");
 578         }
 579 }
 580
 581 /* Determine how many cpu columns, and what index they are in kern.cp_times */
 582 static int
 583 getcpuinfo(u_long *maskp, int *maxidp)
 584 {
 585         int maxcpu;
 586         int maxid;
 587         int ncpus;
 588         int i, j;
 589         int empty;
 590         size_t size;
 591         long *times;
 592         u_long mask;
 593
 594         if (kd != NULL)
 595                 errx(1, "not implemented");
 596         mask = 0;
 597         ncpus = 0;
 598         size = sizeof(maxcpu);
 599         mysysctl("kern.smp.maxcpus", &maxcpu, &size, NULL, 0);
 600         if (size != sizeof(maxcpu))
 601                 errx(1, "sysctl kern.smp.maxcpus");
 602         size = sizeof(long) * maxcpu * CPUSTATES;
 603         times = malloc(size);
 604         if (times == NULL)
 605                 err(1, "malloc %zd bytes", size);
 606         mysysctl("kern.cp_times", times, &size, NULL, 0);
 607         maxid = (size / CPUSTATES / sizeof(long)) - 1;
 608         for (i = 0; i <= maxid; i++) {
 609                 empty = 1;
 610                 for (j = 0; empty && j < CPUSTATES; j++) {
 611                         if (times[i * CPUSTATES + j] != 0)
 612                                 empty = 0;
 613                 }
 614                 if (!empty) {
 615                         mask |= (1ul << i);
 616                         ncpus++;
 617                 }
 618         }
 619         if (maskp)
 620                 *maskp = mask;
 621         if (maxidp)
 622                 *maxidp = maxid;
 623         return (ncpus);
 624 }
 625
 626
 627 static void
 628 prthuman(u_int64_t val, int size)
 629 {
 630         char buf[10];
 631         int flags;
 632
 633         if (size < 5 || size > 9)
 634                 errx(1, "doofus");
 635         flags = HN_B | HN_NOSPACE | HN_DECIMAL;
 636         humanize_number(buf, size, val, "", HN_AUTOSCALE, flags);
 637         printf("%*s", size, buf);
 638 }
 639
 640 static int hz, hdrcnt;
 641
 642 static long *cur_cp_times;
 643 static long *last_cp_times;
 644 static size_t size_cp_times;
 645
 646 static void
 647 dovmstat(unsigned int interval, int reps)
 648 {
 649         struct vmtotal total;
 650         time_t uptime, halfuptime;
 651         struct devinfo *tmp_dinfo;
 652         size_t size;
 653         int ncpus, maxid;
 654         u_long cpumask;
 655
 656         uptime = getuptime();
 657         halfuptime = uptime / 2;
 658
 659         /*
 660          * If the user stops the program (control-Z) and then resumes it,
 661          * print out the header again.
 662          */
 663         (void)signal(SIGCONT, needhdr);
 664
 665         /*
 666          * If our standard output is a tty, then install a SIGWINCH handler
 667          * and set wresized so that our first iteration through the main
 668          * vmstat loop will peek at the terminal's current rows to find out
 669          * how many lines can fit in a screenful of output.
 670          */
 671         if (isatty(fileno(stdout)) != 0) {
 672                 wresized = 1;
 673                 (void)signal(SIGWINCH, needresize);
 674         } else {
 675                 wresized = 0;
 676                 winlines = VMSTAT_DEFAULT_LINES;
 677         }
 678
 679         if (kd != NULL) {
 680                 if (namelist[X_STATHZ].n_type != 0 &&
 681                     namelist[X_STATHZ].n_value != 0)
 682                         kread(X_STATHZ, &hz, sizeof(hz));
 683                 if (!hz)
 684                         kread(X_HZ, &hz, sizeof(hz));
 685         } else {
 686                 struct clockinfo clockrate;
 687
 688                 size = sizeof(clockrate);
 689                 mysysctl("kern.clockrate", &clockrate, &size, NULL, 0);
 690                 if (size != sizeof(clockrate))
 691                         errx(1, "clockrate size mismatch");
 692                 hz = clockrate.hz;
 693         }
 694
 695         if (Pflag) {
 696                 ncpus = getcpuinfo(&cpumask, &maxid);
 697                 size_cp_times = sizeof(long) * (maxid + 1) * CPUSTATES;
 698                 cur_cp_times = calloc(1, size_cp_times);
 699                 last_cp_times = calloc(1, size_cp_times);
 700         }
 701         for (hdrcnt = 1;;) {
 702                 if (!--hdrcnt)
 703                         printhdr(ncpus, cpumask);
 704                 if (kd != NULL) {
 705                         if (kvm_getcptime(kd, cur.cp_time) < 0)
 706                                 errx(1, "kvm_getcptime: %s", kvm_geterr(kd));
 707                 } else {
 708                         size = sizeof(cur.cp_time);
 709                         mysysctl("kern.cp_time", &cur.cp_time, &size, NULL, 0);
 710                         if (size != sizeof(cur.cp_time))
 711                                 errx(1, "cp_time size mismatch");
 712                 }
 713                 if (Pflag) {
 714                         size = size_cp_times;
 715                         mysysctl("kern.cp_times", cur_cp_times, &size, NULL, 0);
 716                         if (size != size_cp_times)
 717                                 errx(1, "cp_times mismatch");
 718                 }
 719
 720                 tmp_dinfo = last.dinfo;
 721                 last.dinfo = cur.dinfo;
 722                 cur.dinfo = tmp_dinfo;
 723                 last.snap_time = cur.snap_time;
 724
 725                 /*
 726                  * Here what we want to do is refresh our device stats.
 727                  * getdevs() returns 1 when the device list has changed.
 728                  * If the device list has changed, we want to go through
 729                  * the selection process again, in case a device that we
 730                  * were previously displaying has gone away.
 731                  */
 732                 switch (devstat_getdevs(NULL, &cur)) {
 733                 case -1:
 734                         errx(1, "%s", devstat_errbuf);
 735                         break;
 736                 case 1: {
 737                         int retval;
 738
 739                         num_devices = cur.dinfo->numdevs;
 740                         generation = cur.dinfo->generation;
 741
 742                         retval = devstat_selectdevs(&dev_select, &num_selected,
 743                                             &num_selections, &select_generation,
 744                                             generation, cur.dinfo->devices,
 745                                             num_devices, matches, num_matches,
 746                                             specified_devices,
 747                                             num_devices_specified, select_mode,
 748                                             maxshowdevs, 0);
 749                         switch (retval) {
 750                         case -1:
 751                                 errx(1, "%s", devstat_errbuf);
 752                                 break;
 753                         case 1:
 754                                 printhdr(ncpus, cpumask);
 755                                 break;
 756                         default:
 757                                 break;
 758                         }
 759                 }
 760                 default:
 761                         break;
 762                 }
 763
 764                 fill_vmmeter(&sum);
 765                 fill_vmtotal(&total);
 766                 (void)printf("%2d %1d %1d",
 767                     total.t_rq - 1, total.t_dw + total.t_pw, total.t_sw);
 768 #define vmstat_pgtok(a) ((a) * (sum.v_page_size >> 10))
 769 #define rate(x) (((x) + halfuptime) / uptime)   /* round */
 770                 if (hflag) {
 771                         printf(" ");
 772                         prthuman(total.t_avm * (u_int64_t)sum.v_page_size, 7);
 773                         printf(" ");
 774                         prthuman(total.t_free * (u_int64_t)sum.v_page_size, 6);
 775                         printf(" ");
 776                 } else {
 777                         printf(" %7d ", vmstat_pgtok(total.t_avm));
 778                         printf(" %6d ", vmstat_pgtok(total.t_free));
 779                 }
 780                 (void)printf("%5lu ",
 781                     (unsigned long)rate(sum.v_vm_faults - osum.v_vm_faults));
 782                 (void)printf("%3lu ",
 783                     (unsigned long)rate(sum.v_reactivated - osum.v_reactivated));
 784                 (void)printf("%3lu ",
 785                     (unsigned long)rate(sum.v_swapin + sum.v_vnodein -
 786                     (osum.v_swapin + osum.v_vnodein)));
 787                 (void)printf("%3lu ",
 788                     (unsigned long)rate(sum.v_swapout + sum.v_vnodeout -
 789                     (osum.v_swapout + osum.v_vnodeout)));
 790                 (void)printf("%5lu ",
 791                     (unsigned long)rate(sum.v_tfree - osum.v_tfree));
 792                 (void)printf("%3lu ",
 793                     (unsigned long)rate(sum.v_pdpages - osum.v_pdpages));
 794                 devstats();
 795                 (void)printf("%4lu %4lu %4lu",
 796                     (unsigned long)rate(sum.v_intr - osum.v_intr),
 797                     (unsigned long)rate(sum.v_syscall - osum.v_syscall),
 798                     (unsigned long)rate(sum.v_swtch - osum.v_swtch));
 799                 if (Pflag)
 800                         pcpustats(ncpus, cpumask, maxid);
 801                 else
 802                         cpustats();
 803                 (void)printf("\n");
 804                 (void)fflush(stdout);
 805                 if (reps >= 0 && --reps <= 0)
 806                         break;
 807                 osum = sum;
 808                 uptime = interval;
 809                 /*
 810                  * We round upward to avoid losing low-frequency events
 811                  * (i.e., >= 1 per interval but < 1 per second).
 812                  */
 813                 if (interval != 1)
 814                         halfuptime = (uptime + 1) / 2;
 815                 else
 816                         halfuptime = 0;
 817                 (void)sleep(interval);
 818         }
 819 }
 820
 821 static void
 822 printhdr(int ncpus, u_long cpumask)
 823 {
 824         int i, num_shown;
 825
 826         num_shown = (num_selected < maxshowdevs) ? num_selected : maxshowdevs;
 827         (void)printf(" procs      memory      page%*s", 19, "");
 828         if (num_shown > 1)
 829                 (void)printf(" disks %*s", num_shown * 4 - 7, "");
 830         else if (num_shown == 1)
 831                 (void)printf("disk");
 832         (void)printf("   faults         ");
 833         if (Pflag) {
 834                 for (i = 0; i < ncpus; i++) {
 835                         if (cpumask & (1ul << i))
 836                                 printf("cpu%-2d    ", i);
 837                 }
 838                 printf("\n");
 839         } else
 840                 printf("cpu\n");
 841         (void)printf(" r b w     avm    fre   flt  re  pi  po    fr  sr ");
 842         for (i = 0; i < num_devices; i++)
 843                 if ((dev_select[i].selected)
 844                  && (dev_select[i].selected <= maxshowdevs))
 845                         (void)printf("%c%c%d ", dev_select[i].device_name[0],
 846                                      dev_select[i].device_name[1],
 847                                      dev_select[i].unit_number);
 848         (void)printf("  in   sy   cs");
 849         if (Pflag) {
 850                 for (i = 0; i < ncpus; i++)
 851                         printf(" us sy id");
 852                 printf("\n");
 853         } else
 854                 printf(" us sy id\n");
 855         if (wresized != 0)
 856                 doresize();
 857         hdrcnt = winlines;
 858 }
 859
 860 /*
 861  * Force a header to be prepended to the next output.
 862  */
 863 static void
 864 needhdr(int dummy __unused)
 865 {
 866
 867         hdrcnt = 1;
 868 }
 869
 870 /*
 871  * When the terminal is resized, force an update of the maximum number of rows
 872  * printed between each header repetition.  Then force a new header to be
 873  * prepended to the next output.
 874  */
 875 void
 876 needresize(int signo)
 877 {
 878
 879         wresized = 1;
 880         hdrcnt = 1;
 881 }
 882
 883 /*
 884  * Update the global `winlines' count of terminal rows.
 885  */
 886 void
 887 doresize(void)
 888 {
 889         int status;
 890         struct winsize w;
 891
 892         for (;;) {
 893                 status = ioctl(fileno(stdout), TIOCGWINSZ, &w);
 894                 if (status == -1 && errno == EINTR)
 895                         continue;
 896                 else if (status == -1)
 897                         err(1, "ioctl");
 898                 if (w.ws_row > 3)
 899                         winlines = w.ws_row - 3;
 900                 else
 901                         winlines = VMSTAT_DEFAULT_LINES;
 902                 break;
 903         }
 904
 905         /*
 906          * Inhibit doresize() calls until we are rescheduled by SIGWINCH.
 907          */
 908         wresized = 0;
 909 }
 910
 911 #ifdef notyet
 912 static void
 913 dotimes(void)
 914 {
 915         unsigned int pgintime, rectime;
 916
 917         kread(X_REC, &rectime, sizeof(rectime));
 918         kread(X_PGIN, &pgintime, sizeof(pgintime));
 919         kread(X_SUM, &sum, sizeof(sum));
 920         (void)printf("%u reclaims, %u total time (usec)\n",
 921             sum.v_pgrec, rectime);
 922         (void)printf("average: %u usec / reclaim\n", rectime / sum.v_pgrec);
 923         (void)printf("\n");
 924         (void)printf("%u page ins, %u total time (msec)\n",
 925             sum.v_pgin, pgintime / 10);
 926         (void)printf("average: %8.1f msec / page in\n",
 927             pgintime / (sum.v_pgin * 10.0));
 928 }
 929 #endif
 930
 931 static long
 932 pct(long top, long bot)
 933 {
 934         long ans;
 935
 936         if (bot == 0)
 937                 return(0);
 938         ans = (quad_t)top * 100 / bot;
 939         return (ans);
 940 }
 941
 942 #define PCT(top, bot) pct((long)(top), (long)(bot))
 943
 944 static void
 945 dosum(void)
 946 {
 947         struct nchstats lnchstats;
 948         long nchtotal;
 949
 950         fill_vmmeter(&sum);
 951         (void)printf("%9u cpu context switches\n", sum.v_swtch);
 952         (void)printf("%9u device interrupts\n", sum.v_intr);
 953         (void)printf("%9u software interrupts\n", sum.v_soft);
 954         (void)printf("%9u traps\n", sum.v_trap);
 955         (void)printf("%9u system calls\n", sum.v_syscall);
 956         (void)printf("%9u kernel threads created\n", sum.v_kthreads);
 957         (void)printf("%9u  fork() calls\n", sum.v_forks);
 958         (void)printf("%9u vfork() calls\n", sum.v_vforks);
 959         (void)printf("%9u rfork() calls\n", sum.v_rforks);
 960         (void)printf("%9u swap pager pageins\n", sum.v_swapin);
 961         (void)printf("%9u swap pager pages paged in\n", sum.v_swappgsin);
 962         (void)printf("%9u swap pager pageouts\n", sum.v_swapout);
 963         (void)printf("%9u swap pager pages paged out\n", sum.v_swappgsout);
 964         (void)printf("%9u vnode pager pageins\n", sum.v_vnodein);
 965         (void)printf("%9u vnode pager pages paged in\n", sum.v_vnodepgsin);
 966         (void)printf("%9u vnode pager pageouts\n", sum.v_vnodeout);
 967         (void)printf("%9u vnode pager pages paged out\n", sum.v_vnodepgsout);
 968         (void)printf("%9u page daemon wakeups\n", sum.v_pdwakeups);
 969         (void)printf("%9u pages examined by the page daemon\n", sum.v_pdpages);
 970         (void)printf("%9u pages reactivated\n", sum.v_reactivated);
 971         (void)printf("%9u copy-on-write faults\n", sum.v_cow_faults);
 972         (void)printf("%9u copy-on-write optimized faults\n", sum.v_cow_optim);
 973         (void)printf("%9u zero fill pages zeroed\n", sum.v_zfod);
 974         (void)printf("%9u zero fill pages prezeroed\n", sum.v_ozfod);
 975         (void)printf("%9u intransit blocking page faults\n", sum.v_intrans);
 976         (void)printf("%9u total VM faults taken\n", sum.v_vm_faults);
 977         (void)printf("%9u pages affected by kernel thread creation\n", sum.v_kthreadpages);
 978         (void)printf("%9u pages affected by  fork()\n", sum.v_forkpages);
 979         (void)printf("%9u pages affected by vfork()\n", sum.v_vforkpages);
 980         (void)printf("%9u pages affected by rfork()\n", sum.v_rforkpages);
 981         (void)printf("%9u pages cached\n", sum.v_tcached);
 982         (void)printf("%9u pages freed\n", sum.v_tfree);
 983         (void)printf("%9u pages freed by daemon\n", sum.v_dfree);
 984         (void)printf("%9u pages freed by exiting processes\n", sum.v_pfree);
 985         (void)printf("%9u pages active\n", sum.v_active_count);
 986         (void)printf("%9u pages inactive\n", sum.v_inactive_count);
 987         (void)printf("%9u pages in VM cache\n", sum.v_cache_count);
 988         (void)printf("%9u pages wired down\n", sum.v_wire_count);
 989         (void)printf("%9u pages free\n", sum.v_free_count);
 990         (void)printf("%9u bytes per page\n", sum.v_page_size);
 991         if (kd != NULL) {
 992                 kread(X_NCHSTATS, &lnchstats, sizeof(lnchstats));
 993         } else {
 994                 size_t size = sizeof(lnchstats);
 995                 mysysctl("vfs.cache.nchstats", &lnchstats, &size, NULL, 0);
 996                 if (size != sizeof(lnchstats))
 997                         errx(1, "vfs.cache.nchstats size mismatch");
 998         }
 999         nchtotal = lnchstats.ncs_goodhits + lnchstats.ncs_neghits +
1000             lnchstats.ncs_badhits + lnchstats.ncs_falsehits +
1001             lnchstats.ncs_miss + lnchstats.ncs_long;
1002         (void)printf("%9ld total name lookups\n", nchtotal);
1003         (void)printf(
1004             "%9s cache hits (%ld%% pos + %ld%% neg) system %ld%% per-directory\n",
1005             "", PCT(lnchstats.ncs_goodhits, nchtotal),
1006             PCT(lnchstats.ncs_neghits, nchtotal),
1007             PCT(lnchstats.ncs_pass2, nchtotal));
1008         (void)printf("%9s deletions %ld%%, falsehits %ld%%, toolong %ld%%\n", "",
1009             PCT(lnchstats.ncs_badhits, nchtotal),
1010             PCT(lnchstats.ncs_falsehits, nchtotal),
1011             PCT(lnchstats.ncs_long, nchtotal));
1012 }
1013
1014 static void
1015 doforkst(void)
1016 {
1017         fill_vmmeter(&sum);
1018         (void)printf("%u forks, %u pages, average %.2f\n",
1019             sum.v_forks, sum.v_forkpages,
1020             sum.v_forks == 0 ? 0.0 :
1021             (double)sum.v_forkpages / sum.v_forks);
1022         (void)printf("%u vforks, %u pages, average %.2f\n",
1023             sum.v_vforks, sum.v_vforkpages,
1024             sum.v_vforks == 0 ? 0.0 :
1025             (double)sum.v_vforkpages / sum.v_vforks);
1026         (void)printf("%u rforks, %u pages, average %.2f\n",
1027             sum.v_rforks, sum.v_rforkpages,
1028             sum.v_rforks == 0 ? 0.0 :
1029             (double)sum.v_rforkpages / sum.v_rforks);
1030 }
1031
1032 static void
1033 devstats(void)
1034 {
1035         int dn, state;
1036         long double transfers_per_second;
1037         long double busy_seconds;
1038         long tmp;
1039
1040         for (state = 0; state < CPUSTATES; ++state) {
1041                 tmp = cur.cp_time[state];
1042                 cur.cp_time[state] -= last.cp_time[state];
1043                 last.cp_time[state] = tmp;
1044         }
1045
1046         busy_seconds = cur.snap_time - last.snap_time;
1047
1048         for (dn = 0; dn < num_devices; dn++) {
1049                 int di;
1050
1051                 if ((dev_select[dn].selected == 0)
1052                  || (dev_select[dn].selected > maxshowdevs))
1053                         continue;
1054
1055                 di = dev_select[dn].position;
1056
1057                 if (devstat_compute_statistics(&cur.dinfo->devices[di],
1058                     &last.dinfo->devices[di], busy_seconds,
1059                     DSM_TRANSFERS_PER_SECOND, &transfers_per_second,
1060                     DSM_NONE) != 0)
1061                         errx(1, "%s", devstat_errbuf);
1062
1063                 (void)printf("%3.0Lf ", transfers_per_second);
1064         }
1065 }
1066
1067 static void
1068 percent(double pct, int *over)
1069 {
1070         char buf[10];
1071         int l;
1072
1073         l = snprintf(buf, sizeof(buf), "%.0f", pct);
1074         if (l == 1 && *over) {
1075                 printf("%s",  buf);
1076                 (*over)--;
1077         } else
1078                 printf("%2s", buf);
1079         if (l > 2)
1080                 (*over)++;
1081 }
1082
1083 static void
1084 cpustats(void)
1085 {
1086         int state, over;
1087         double lpct, total;
1088
1089         total = 0;
1090         for (state = 0; state < CPUSTATES; ++state)
1091                 total += cur.cp_time[state];
1092         if (total)
1093                 lpct = 100.0 / total;
1094         else
1095                 lpct = 0.0;
1096         over = 0;
1097         printf(" ");
1098         percent((cur.cp_time[CP_USER] + cur.cp_time[CP_NICE]) * lpct, &over);
1099         printf(" ");
1100         percent((cur.cp_time[CP_SYS] + cur.cp_time[CP_INTR]) * lpct, &over);
1101         printf(" ");
1102         percent(cur.cp_time[CP_IDLE] * lpct, &over);
1103 }
1104
1105 static void
1106 pcpustats(int ncpus, u_long cpumask, int maxid)
1107 {
1108         int state, i;
1109         double lpct, total;
1110         long tmp;
1111         int over;
1112
1113         /* devstats does this for cp_time */
1114         for (i = 0; i <= maxid; i++) {
1115                 if ((cpumask & (1ul << i)) == 0)
1116                         continue;
1117                 for (state = 0; state < CPUSTATES; ++state) {
1118                         tmp = cur_cp_times[i * CPUSTATES + state];
1119                         cur_cp_times[i * CPUSTATES + state] -= last_cp_times[i * CPUSTATES + state];
1120                         last_cp_times[i * CPUSTATES + state] = tmp;
1121                 }
1122         }
1123
1124         over = 0;
1125         for (i = 0; i <= maxid; i++) {
1126                 if ((cpumask & (1ul << i)) == 0)
1127                         continue;
1128                 total = 0;
1129                 for (state = 0; state < CPUSTATES; ++state)
1130                         total += cur_cp_times[i * CPUSTATES + state];
1131                 if (total)
1132                         lpct = 100.0 / total;
1133                 else
1134                         lpct = 0.0;
1135                 printf(" ");
1136                 percent((cur_cp_times[i * CPUSTATES + CP_USER] +
1137                          cur_cp_times[i * CPUSTATES + CP_NICE]) * lpct, &over);
1138                 printf(" ");
1139                 percent((cur_cp_times[i * CPUSTATES + CP_SYS] +
1140                          cur_cp_times[i * CPUSTATES + CP_INTR]) * lpct, &over);
1141                 printf(" ");
1142                 percent(cur_cp_times[i * CPUSTATES + CP_IDLE] * lpct, &over);
1143         }
1144 }
1145
1146 static void
1147 dointr(void)
1148 {
1149         unsigned long *intrcnt, uptime;
1150         uint64_t inttotal;
1151         size_t clen, inamlen, intrcntlen, istrnamlen;
1152         unsigned int i, nintr;
1153         char *intrname, *tintrname;
1154
1155         uptime = getuptime();
1156         if (kd != NULL) {
1157                 intrcntlen = namelist[X_EINTRCNT].n_value -
1158                     namelist[X_INTRCNT].n_value;
1159                 inamlen = namelist[X_EINTRNAMES].n_value -
1160                     namelist[X_INTRNAMES].n_value;
1161                 if ((intrcnt = malloc(intrcntlen)) == NULL ||
1162                     (intrname = malloc(inamlen)) == NULL)
1163                         err(1, "malloc()");
1164                 kread(X_INTRCNT, intrcnt, intrcntlen);
1165                 kread(X_INTRNAMES, intrname, inamlen);
1166         } else {
1167                 for (intrcnt = NULL, intrcntlen = 1024; ; intrcntlen *= 2) {
1168                         if ((intrcnt = reallocf(intrcnt, intrcntlen)) == NULL)
1169                                 err(1, "reallocf()");
1170                         if (mysysctl("hw.intrcnt",
1171                             intrcnt, &intrcntlen, NULL, 0) == 0)
1172                                 break;
1173                 }
1174                 for (intrname = NULL, inamlen = 1024; ; inamlen *= 2) {
1175                         if ((intrname = reallocf(intrname, inamlen)) == NULL)
1176                                 err(1, "reallocf()");
1177                         if (mysysctl("hw.intrnames",
1178                             intrname, &inamlen, NULL, 0) == 0)
1179                                 break;
1180                 }
1181         }
1182         nintr = intrcntlen / sizeof(unsigned long);
1183         tintrname = intrname;
1184         istrnamlen = strlen("interrupt");
1185         for (i = 0; i < nintr; i++) {
1186                 clen = strlen(tintrname);
1187                 if (clen > istrnamlen)
1188                         istrnamlen = clen;
1189                 tintrname += clen + 1;
1190         }
1191         (void)printf("%-*s %20s %10s\n", istrnamlen, "interrupt", "total",
1192             "rate");
1193         inttotal = 0;
1194         for (i = 0; i < nintr; i++) {
1195                 if (intrname[0] != '\0' && (*intrcnt != 0 || aflag))
1196                         (void)printf("%-*s %20lu %10lu\n", istrnamlen, intrname,
1197                             *intrcnt, *intrcnt / uptime);
1198                 intrname += strlen(intrname) + 1;
1199                 inttotal += *intrcnt++;
1200         }
1201         (void)printf("%-*s %20llu %10llu\n", istrnamlen, "Total",
1202             (long long)inttotal, (long long)(inttotal / uptime));
1203 }
1204
1205 static void
1206 domemstat_malloc(void)
1207 {
1208         struct memory_type_list *mtlp;
1209         struct memory_type *mtp;
1210         int error, first, i;
1211
1212         mtlp = memstat_mtl_alloc();
1213         if (mtlp == NULL) {
1214                 warn("memstat_mtl_alloc");
1215                 return;
1216         }
1217         if (kd == NULL) {
1218                 if (memstat_sysctl_malloc(mtlp, 0) < 0) {
1219                         warnx("memstat_sysctl_malloc: %s",
1220                             memstat_strerror(memstat_mtl_geterror(mtlp)));
1221                         return;
1222                 }
1223         } else {
1224                 if (memstat_kvm_malloc(mtlp, kd) < 0) {
1225                         error = memstat_mtl_geterror(mtlp);
1226                         if (error == MEMSTAT_ERROR_KVM)
1227                                 warnx("memstat_kvm_malloc: %s",
1228                                     kvm_geterr(kd));
1229                         else
1230                                 warnx("memstat_kvm_malloc: %s",
1231                                     memstat_strerror(error));
1232                 }
1233         }
1234         printf("%13s %5s %6s %7s %8s  Size(s)\n", "Type", "InUse", "MemUse",
1235             "HighUse", "Requests");
1236         for (mtp = memstat_mtl_first(mtlp); mtp != NULL;
1237             mtp = memstat_mtl_next(mtp)) {
1238                 if (memstat_get_numallocs(mtp) == 0 &&
1239                     memstat_get_count(mtp) == 0)
1240                         continue;
1241                 printf("%13s %5lld %5lldK %7s %8lld  ",
1242                     memstat_get_name(mtp), memstat_get_count(mtp),
1243                     ((int64_t)memstat_get_bytes(mtp) + 1023) / 1024, "-",
1244                     memstat_get_numallocs(mtp));
1245                 first = 1;
1246                 for (i = 0; i < 32; i++) {
1247                         if (memstat_get_sizemask(mtp) & (1 << i)) {
1248                                 if (!first)
1249                                         printf(",");
1250                                 printf("%d", 1 << (i + 4));
1251                                 first = 0;
1252                         }
1253                 }
1254                 printf("\n");
1255         }
1256         memstat_mtl_free(mtlp);
1257 }
1258
1259 static void
1260 domemstat_zone(void)
1261 {
1262         struct memory_type_list *mtlp;
1263         struct memory_type *mtp;
1264         char name[MEMTYPE_MAXNAME + 1];
1265         int error;
1266
1267         mtlp = memstat_mtl_alloc();
1268         if (mtlp == NULL) {
1269                 warn("memstat_mtl_alloc");
1270                 return;
1271         }
1272         if (kd == NULL) {
1273                 if (memstat_sysctl_uma(mtlp, 0) < 0) {
1274                         warnx("memstat_sysctl_uma: %s",
1275                             memstat_strerror(memstat_mtl_geterror(mtlp)));
1276                         return;
1277                 }
1278         } else {
1279                 if (memstat_kvm_uma(mtlp, kd) < 0) {
1280                         error = memstat_mtl_geterror(mtlp);
1281                         if (error == MEMSTAT_ERROR_KVM)
1282                                 warnx("memstat_kvm_uma: %s",
1283                                     kvm_geterr(kd));
1284                         else
1285                                 warnx("memstat_kvm_uma: %s",
1286                                     memstat_strerror(error));
1287                 }
1288         }
1289         printf("%-20s %8s  %8s  %8s  %8s  %8s  %8s\n\n", "ITEM", "SIZE",
1290             "LIMIT", "USED", "FREE", "REQUESTS", "FAILURES");
1291         for (mtp = memstat_mtl_first(mtlp); mtp != NULL;
1292             mtp = memstat_mtl_next(mtp)) {
1293                 strlcpy(name, memstat_get_name(mtp), MEMTYPE_MAXNAME);
1294                 strcat(name, ":");
1295                 printf("%-20s %8llu, %8llu, %8llu, %8llu, %8llu, %8llu\n", name,
1296                     memstat_get_size(mtp), memstat_get_countlimit(mtp),
1297                     memstat_get_count(mtp), memstat_get_free(mtp),
1298                     memstat_get_numallocs(mtp), memstat_get_failures(mtp));
1299         }
1300         memstat_mtl_free(mtlp);
1301         printf("\n");
1302 }
1303
1304 /*
1305  * kread reads something from the kernel, given its nlist index.
1306  */
1307 static void
1308 kreado(int nlx, void *addr, size_t size, size_t offset)
1309 {
1310         const char *sym;
1311
1312         if (namelist[nlx].n_type == 0 || namelist[nlx].n_value == 0) {
1313                 sym = namelist[nlx].n_name;
1314                 if (*sym == '_')
1315                         ++sym;
1316                 errx(1, "symbol %s not defined", sym);
1317         }
1318         if ((size_t)kvm_read(kd, namelist[nlx].n_value + offset, addr,
1319             size) != size) {
1320                 sym = namelist[nlx].n_name;
1321                 if (*sym == '_')
1322                         ++sym;
1323                 errx(1, "%s: %s", sym, kvm_geterr(kd));
1324         }
1325 }
1326
1327 static void
1328 kread(int nlx, void *addr, size_t size)
1329 {
1330         kreado(nlx, addr, size, 0);
1331 }
1332
1333 static char *
1334 kgetstr(const char *strp)
1335 {
1336         int n = 0, size = 1;
1337         char *ret = NULL;
1338
1339         do {
1340                 if (size == n + 1) {
1341                         ret = realloc(ret, size);
1342                         if (ret == NULL)
1343                                 err(1, "%s: realloc", __func__);
1344                         size *= 2;
1345                 }
1346                 if (kvm_read(kd, (u_long)strp + n, &ret[n], 1) != 1)
1347                         errx(1, "%s: %s", __func__, kvm_geterr(kd));
1348         } while (ret[n++] != '\0');
1349         return (ret);
1350 }
1351
1352 static void
1353 usage(void)
1354 {
1355         (void)fprintf(stderr, "%s%s",
1356                 "usage: vmstat [-afHhimPsz] [-c count] [-M core [-N system]] [-w wait]\n",
1357                 "              [-n devs] [-p type,if,pass] [disks]\n");
1358         exit(1);
1359 }