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         { "_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(void);
 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     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         if (kd != NULL && (c = kvm_nlist(kd, namelist)) != 0) {
 263                 if (c > 0) {
 264                         warnx("undefined symbols:");
 265                         for (c = 0;
 266                              c < (int)(sizeof(namelist)/sizeof(namelist[0]));
 267                              c++)
 268                                 if (namelist[c].n_type == 0)
 269                                         (void)fprintf(stderr, " %s",
 270                                             namelist[c].n_name);
 271                         (void)fputc('\n', stderr);
 272                 } else
 273                         warnx("kvm_nlist: %s", kvm_geterr(kd));
 274                 exit(1);
 275         }
 276         if (kd && Pflag)
 277                 errx(1, "Cannot use -P with crash dumps");
 278
 279         if (todo & VMSTAT) {
 280                 /*
 281                  * Make sure that the userland devstat version matches the
 282                  * kernel devstat version.  If not, exit and print a
 283                  * message informing the user of his mistake.
 284                  */
 285                 if (devstat_checkversion(NULL) < 0)
 286                         errx(1, "%s", devstat_errbuf);
 287
 288
 289                 argv = getdrivedata(argv);
 290         }
 291
 292 #define BACKWARD_COMPATIBILITY
 293 #ifdef  BACKWARD_COMPATIBILITY
 294         if (*argv) {
 295                 f = atof(*argv);
 296                 interval = f * 1000;
 297                 if (*++argv)
 298                         reps = atoi(*argv);
 299         }
 300 #endif
 301
 302         if (interval) {
 303                 if (!reps)
 304                         reps = -1;
 305         } else if (reps)
 306                 interval = 1 * 1000;
 307
 308         if (todo & FORKSTAT)
 309                 doforkst();
 310         if (todo & MEMSTAT)
 311                 domemstat_malloc();
 312         if (todo & ZMEMSTAT)
 313                 domemstat_zone();
 314         if (todo & SUMSTAT)
 315                 dosum();
 316 #ifdef notyet
 317         if (todo & TIMESTAT)
 318                 dotimes();
 319 #endif
 320         if (todo & INTRSTAT)
 321                 dointr();
 322         if (todo & VMSTAT)
 323                 dovmstat(interval, reps);
 324         exit(0);
 325 }
 326
 327 static int
 328 mysysctl(const char *name, void *oldp, size_t *oldlenp,
 329     void *newp, size_t newlen)
 330 {
 331         int error;
 332
 333         error = sysctlbyname(name, oldp, oldlenp, newp, newlen);
 334         if (error != 0 && errno != ENOMEM)
 335                 err(1, "sysctl(%s)", name);
 336         return (error);
 337 }
 338
 339 static char **
 340 getdrivedata(char **argv)
 341 {
 342         if ((num_devices = devstat_getnumdevs(NULL)) < 0)
 343                 errx(1, "%s", devstat_errbuf);
 344
 345         cur.dinfo = (struct devinfo *)calloc(1, sizeof(struct devinfo));
 346         last.dinfo = (struct devinfo *)calloc(1, sizeof(struct devinfo));
 347
 348         if (devstat_getdevs(NULL, &cur) == -1)
 349                 errx(1, "%s", devstat_errbuf);
 350
 351         num_devices = cur.dinfo->numdevs;
 352         generation = cur.dinfo->generation;
 353
 354         specified_devices = (char **)malloc(sizeof(char *));
 355         for (num_devices_specified = 0; *argv; ++argv) {
 356                 if (isdigit(**argv))
 357                         break;
 358                 num_devices_specified++;
 359                 specified_devices = (char **)realloc(specified_devices,
 360                                                      sizeof(char *) *
 361                                                      num_devices_specified);
 362                 specified_devices[num_devices_specified - 1] = *argv;
 363         }
 364         dev_select = NULL;
 365
 366         if (nflag == 0 && maxshowdevs < num_devices_specified)
 367                         maxshowdevs = num_devices_specified;
 368
 369         /*
 370          * People are generally only interested in disk statistics when
 371          * they're running vmstat.  So, that's what we're going to give
 372          * them if they don't specify anything by default.  We'll also give
 373          * them any other random devices in the system so that we get to
 374          * maxshowdevs devices, if that many devices exist.  If the user
 375          * specifies devices on the command line, either through a pattern
 376          * match or by naming them explicitly, we will give the user only
 377          * those devices.
 378          */
 379         if ((num_devices_specified == 0) && (num_matches == 0)) {
 380                 if (devstat_buildmatch(da, &matches, &num_matches) != 0)
 381                         errx(1, "%s", devstat_errbuf);
 382
 383                 select_mode = DS_SELECT_ADD;
 384         } else
 385                 select_mode = DS_SELECT_ONLY;
 386
 387         /*
 388          * At this point, selectdevs will almost surely indicate that the
 389          * device list has changed, so we don't look for return values of 0
 390          * or 1.  If we get back -1, though, there is an error.
 391          */
 392         if (devstat_selectdevs(&dev_select, &num_selected, &num_selections,
 393                        &select_generation, generation, cur.dinfo->devices,
 394                        num_devices, matches, num_matches, specified_devices,
 395                        num_devices_specified, select_mode,
 396                        maxshowdevs, 0) == -1)
 397                 errx(1, "%s", devstat_errbuf);
 398
 399         return(argv);
 400 }
 401
 402 static long
 403 getuptime(void)
 404 {
 405         struct timespec sp;
 406
 407         (void)clock_gettime(CLOCK_MONOTONIC, &sp);
 408
 409         return(sp.tv_sec);
 410 }
 411
 412 static void
 413 fill_pcpu(struct pcpu ***pcpup, int* maxcpup)
 414 {
 415         struct pcpu **pcpu;
 416
 417         int maxcpu, i;
 418
 419         *pcpup = NULL;
 420
 421         if (kd == NULL)
 422                 return;
 423
 424         maxcpu = kvm_getmaxcpu(kd);
 425         if (maxcpu < 0)
 426                 errx(1, "kvm_getmaxcpu: %s", kvm_geterr(kd));
 427
 428         pcpu = calloc(maxcpu, sizeof(struct pcpu *));
 429         if (pcpu == NULL)
 430                 err(1, "calloc");
 431
 432         for (i = 0; i < maxcpu; i++) {
 433                 pcpu[i] = kvm_getpcpu(kd, i);
 434                 if (pcpu[i] == (struct pcpu *)-1)
 435                         errx(1, "kvm_getpcpu: %s", kvm_geterr(kd));
 436         }
 437
 438         *maxcpup = maxcpu;
 439         *pcpup = pcpu;
 440 }
 441
 442 static void
 443 free_pcpu(struct pcpu **pcpu, int maxcpu)
 444 {
 445         int i;
 446
 447         for (i = 0; i < maxcpu; i++)
 448                 free(pcpu[i]);
 449         free(pcpu);
 450 }
 451
 452 static void
 453 fill_vmmeter(struct vmmeter *vmmp)
 454 {
 455         struct pcpu **pcpu;
 456         int maxcpu, i;
 457
 458         if (kd != NULL) {
 459                 kread(X_SUM, vmmp, sizeof(*vmmp));
 460                 fill_pcpu(&pcpu, &maxcpu);
 461                 for (i = 0; i < maxcpu; i++) {
 462                         if (pcpu[i] == NULL)
 463                                 continue;
 464 #define ADD_FROM_PCPU(i, name) \
 465                         vmmp->name += pcpu[i]->pc_cnt.name
 466                         ADD_FROM_PCPU(i, v_swtch);
 467                         ADD_FROM_PCPU(i, v_trap);
 468                         ADD_FROM_PCPU(i, v_syscall);
 469                         ADD_FROM_PCPU(i, v_intr);
 470                         ADD_FROM_PCPU(i, v_soft);
 471                         ADD_FROM_PCPU(i, v_vm_faults);
 472                         ADD_FROM_PCPU(i, v_io_faults);
 473                         ADD_FROM_PCPU(i, v_cow_faults);
 474                         ADD_FROM_PCPU(i, v_cow_optim);
 475                         ADD_FROM_PCPU(i, v_zfod);
 476                         ADD_FROM_PCPU(i, v_ozfod);
 477                         ADD_FROM_PCPU(i, v_swapin);
 478                         ADD_FROM_PCPU(i, v_swapout);
 479                         ADD_FROM_PCPU(i, v_swappgsin);
 480                         ADD_FROM_PCPU(i, v_swappgsout);
 481                         ADD_FROM_PCPU(i, v_vnodein);
 482                         ADD_FROM_PCPU(i, v_vnodeout);
 483                         ADD_FROM_PCPU(i, v_vnodepgsin);
 484                         ADD_FROM_PCPU(i, v_vnodepgsout);
 485                         ADD_FROM_PCPU(i, v_intrans);
 486                         ADD_FROM_PCPU(i, v_tfree);
 487                         ADD_FROM_PCPU(i, v_forks);
 488                         ADD_FROM_PCPU(i, v_vforks);
 489                         ADD_FROM_PCPU(i, v_rforks);
 490                         ADD_FROM_PCPU(i, v_kthreads);
 491                         ADD_FROM_PCPU(i, v_forkpages);
 492                         ADD_FROM_PCPU(i, v_vforkpages);
 493                         ADD_FROM_PCPU(i, v_rforkpages);
 494                         ADD_FROM_PCPU(i, v_kthreadpages);
 495 #undef ADD_FROM_PCPU
 496                 }
 497                 free_pcpu(pcpu, maxcpu);
 498         } else {
 499                 size_t size = sizeof(unsigned int);
 500 #define GET_VM_STATS(cat, name) \
 501         mysysctl("vm.stats." #cat "." #name, &vmmp->name, &size, NULL, 0)
 502                 /* sys */
 503                 GET_VM_STATS(sys, v_swtch);
 504                 GET_VM_STATS(sys, v_trap);
 505                 GET_VM_STATS(sys, v_syscall);
 506                 GET_VM_STATS(sys, v_intr);
 507                 GET_VM_STATS(sys, v_soft);
 508
 509                 /* vm */
 510                 GET_VM_STATS(vm, v_vm_faults);
 511                 GET_VM_STATS(vm, v_io_faults);
 512                 GET_VM_STATS(vm, v_cow_faults);
 513                 GET_VM_STATS(vm, v_cow_optim);
 514                 GET_VM_STATS(vm, v_zfod);
 515                 GET_VM_STATS(vm, v_ozfod);
 516                 GET_VM_STATS(vm, v_swapin);
 517                 GET_VM_STATS(vm, v_swapout);
 518                 GET_VM_STATS(vm, v_swappgsin);
 519                 GET_VM_STATS(vm, v_swappgsout);
 520                 GET_VM_STATS(vm, v_vnodein);
 521                 GET_VM_STATS(vm, v_vnodeout);
 522                 GET_VM_STATS(vm, v_vnodepgsin);
 523                 GET_VM_STATS(vm, v_vnodepgsout);
 524                 GET_VM_STATS(vm, v_intrans);
 525                 GET_VM_STATS(vm, v_reactivated);
 526                 GET_VM_STATS(vm, v_pdwakeups);
 527                 GET_VM_STATS(vm, v_pdpages);
 528                 GET_VM_STATS(vm, v_tcached);
 529                 GET_VM_STATS(vm, v_dfree);
 530                 GET_VM_STATS(vm, v_pfree);
 531                 GET_VM_STATS(vm, v_tfree);
 532                 GET_VM_STATS(vm, v_page_size);
 533                 GET_VM_STATS(vm, v_page_count);
 534                 GET_VM_STATS(vm, v_free_reserved);
 535                 GET_VM_STATS(vm, v_free_target);
 536                 GET_VM_STATS(vm, v_free_min);
 537                 GET_VM_STATS(vm, v_free_count);
 538                 GET_VM_STATS(vm, v_wire_count);
 539                 GET_VM_STATS(vm, v_active_count);
 540                 GET_VM_STATS(vm, v_inactive_target);
 541                 GET_VM_STATS(vm, v_inactive_count);
 542                 GET_VM_STATS(vm, v_cache_count);
 543                 GET_VM_STATS(vm, v_cache_min);
 544                 GET_VM_STATS(vm, v_cache_max);
 545                 GET_VM_STATS(vm, v_pageout_free_min);
 546                 GET_VM_STATS(vm, v_interrupt_free_min);
 547                 /*GET_VM_STATS(vm, v_free_severe);*/
 548                 GET_VM_STATS(vm, v_forks);
 549                 GET_VM_STATS(vm, v_vforks);
 550                 GET_VM_STATS(vm, v_rforks);
 551                 GET_VM_STATS(vm, v_kthreads);
 552                 GET_VM_STATS(vm, v_forkpages);
 553                 GET_VM_STATS(vm, v_vforkpages);
 554                 GET_VM_STATS(vm, v_rforkpages);
 555                 GET_VM_STATS(vm, v_kthreadpages);
 556 #undef GET_VM_STATS
 557         }
 558 }
 559
 560 static void
 561 fill_vmtotal(struct vmtotal *vmtp)
 562 {
 563         if (kd != NULL) {
 564                 /* XXX fill vmtp */
 565                 errx(1, "not implemented");
 566         } else {
 567                 size_t size = sizeof(*vmtp);
 568                 mysysctl("vm.vmtotal", vmtp, &size, NULL, 0);
 569                 if (size != sizeof(*vmtp))
 570                         errx(1, "vm.total size mismatch");
 571         }
 572 }
 573
 574 /* Determine how many cpu columns, and what index they are in kern.cp_times */
 575 static int
 576 getcpuinfo(u_long *maskp, int *maxidp)
 577 {
 578         int maxcpu;
 579         int maxid;
 580         int ncpus;
 581         int i, j;
 582         int empty;
 583         size_t size;
 584         long *times;
 585         u_long mask;
 586
 587         if (kd != NULL)
 588                 errx(1, "not implemented");
 589         mask = 0;
 590         ncpus = 0;
 591         size = sizeof(maxcpu);
 592         mysysctl("kern.smp.maxcpus", &maxcpu, &size, NULL, 0);
 593         if (size != sizeof(maxcpu))
 594                 errx(1, "sysctl kern.smp.maxcpus");
 595         size = sizeof(long) * maxcpu * CPUSTATES;
 596         times = malloc(size);
 597         if (times == NULL)
 598                 err(1, "malloc %zd bytes", size);
 599         mysysctl("kern.cp_times", times, &size, NULL, 0);
 600         maxid = (size / CPUSTATES / sizeof(long)) - 1;
 601         for (i = 0; i <= maxid; i++) {
 602                 empty = 1;
 603                 for (j = 0; empty && j < CPUSTATES; j++) {
 604                         if (times[i * CPUSTATES + j] != 0)
 605                                 empty = 0;
 606                 }
 607                 if (!empty) {
 608                         mask |= (1ul << i);
 609                         ncpus++;
 610                 }
 611         }
 612         if (maskp)
 613                 *maskp = mask;
 614         if (maxidp)
 615                 *maxidp = maxid;
 616         return (ncpus);
 617 }
 618
 619
 620 static void
 621 prthuman(u_int64_t val, int size)
 622 {
 623         char buf[10];
 624         int flags;
 625
 626         if (size < 5 || size > 9)
 627                 errx(1, "doofus");
 628         flags = HN_B | HN_NOSPACE | HN_DECIMAL;
 629         humanize_number(buf, size, val, "", HN_AUTOSCALE, flags);
 630         printf("%*s", size, buf);
 631 }
 632
 633 static int hz, hdrcnt;
 634
 635 static long *cur_cp_times;
 636 static long *last_cp_times;
 637 static size_t size_cp_times;
 638
 639 static void
 640 dovmstat(unsigned int interval, int reps)
 641 {
 642         struct vmtotal total;
 643         time_t uptime, halfuptime;
 644         struct devinfo *tmp_dinfo;
 645         size_t size;
 646         int ncpus, maxid;
 647         u_long cpumask;
 648         int rate_adj;
 649
 650         uptime = getuptime();
 651         halfuptime = uptime / 2;
 652         rate_adj = 1;
 653         ncpus = 1;
 654         maxid = 0;
 655
 656         /*
 657          * If the user stops the program (control-Z) and then resumes it,
 658          * print out the header again.
 659          */
 660         (void)signal(SIGCONT, needhdr);
 661
 662         /*
 663          * If our standard output is a tty, then install a SIGWINCH handler
 664          * and set wresized so that our first iteration through the main
 665          * vmstat loop will peek at the terminal's current rows to find out
 666          * how many lines can fit in a screenful of output.
 667          */
 668         if (isatty(fileno(stdout)) != 0) {
 669                 wresized = 1;
 670                 (void)signal(SIGWINCH, needresize);
 671         } else {
 672                 wresized = 0;
 673                 winlines = VMSTAT_DEFAULT_LINES;
 674         }
 675
 676         if (kd != NULL) {
 677                 if (namelist[X_STATHZ].n_type != 0 &&
 678                     namelist[X_STATHZ].n_value != 0)
 679                         kread(X_STATHZ, &hz, sizeof(hz));
 680                 if (!hz)
 681                         kread(X_HZ, &hz, sizeof(hz));
 682         } else {
 683                 struct clockinfo clockrate;
 684
 685                 size = sizeof(clockrate);
 686                 mysysctl("kern.clockrate", &clockrate, &size, NULL, 0);
 687                 if (size != sizeof(clockrate))
 688                         errx(1, "clockrate size mismatch");
 689                 hz = clockrate.hz;
 690         }
 691
 692         if (Pflag) {
 693                 ncpus = getcpuinfo(&cpumask, &maxid);
 694                 size_cp_times = sizeof(long) * (maxid + 1) * CPUSTATES;
 695                 cur_cp_times = calloc(1, size_cp_times);
 696                 last_cp_times = calloc(1, size_cp_times);
 697         }
 698         for (hdrcnt = 1;;) {
 699                 if (!--hdrcnt)
 700                         printhdr(maxid, cpumask);
 701                 if (kd != NULL) {
 702                         if (kvm_getcptime(kd, cur.cp_time) < 0)
 703                                 errx(1, "kvm_getcptime: %s", kvm_geterr(kd));
 704                 } else {
 705                         size = sizeof(cur.cp_time);
 706                         mysysctl("kern.cp_time", &cur.cp_time, &size, NULL, 0);
 707                         if (size != sizeof(cur.cp_time))
 708                                 errx(1, "cp_time size mismatch");
 709                 }
 710                 if (Pflag) {
 711                         size = size_cp_times;
 712                         mysysctl("kern.cp_times", cur_cp_times, &size, NULL, 0);
 713                         if (size != size_cp_times)
 714                                 errx(1, "cp_times mismatch");
 715                 }
 716
 717                 tmp_dinfo = last.dinfo;
 718                 last.dinfo = cur.dinfo;
 719                 cur.dinfo = tmp_dinfo;
 720                 last.snap_time = cur.snap_time;
 721
 722                 /*
 723                  * Here what we want to do is refresh our device stats.
 724                  * getdevs() returns 1 when the device list has changed.
 725                  * If the device list has changed, we want to go through
 726                  * the selection process again, in case a device that we
 727                  * were previously displaying has gone away.
 728                  */
 729                 switch (devstat_getdevs(NULL, &cur)) {
 730                 case -1:
 731                         errx(1, "%s", devstat_errbuf);
 732                         break;
 733                 case 1: {
 734                         int retval;
 735
 736                         num_devices = cur.dinfo->numdevs;
 737                         generation = cur.dinfo->generation;
 738
 739                         retval = devstat_selectdevs(&dev_select, &num_selected,
 740                                             &num_selections, &select_generation,
 741                                             generation, cur.dinfo->devices,
 742                                             num_devices, matches, num_matches,
 743                                             specified_devices,
 744                                             num_devices_specified, select_mode,
 745                                             maxshowdevs, 0);
 746                         switch (retval) {
 747                         case -1:
 748                                 errx(1, "%s", devstat_errbuf);
 749                                 break;
 750                         case 1:
 751                                 printhdr(maxid, cpumask);
 752                                 break;
 753                         default:
 754                                 break;
 755                         }
 756                 }
 757                 default:
 758                         break;
 759                 }
 760
 761                 fill_vmmeter(&sum);
 762                 fill_vmtotal(&total);
 763                 (void)printf("%2d %1d %1d",
 764                     total.t_rq - 1, total.t_dw + total.t_pw, total.t_sw);
 765 #define vmstat_pgtok(a) ((a) * (sum.v_page_size >> 10))
 766 #define rate(x) (((x) * rate_adj + halfuptime) / uptime)        /* round */
 767                 if (hflag) {
 768                         printf(" ");
 769                         prthuman(total.t_avm * (u_int64_t)sum.v_page_size, 7);
 770                         printf(" ");
 771                         prthuman(total.t_free * (u_int64_t)sum.v_page_size, 6);
 772                         printf(" ");
 773                 } else {
 774                         printf(" %7d ", vmstat_pgtok(total.t_avm));
 775                         printf(" %6d ", vmstat_pgtok(total.t_free));
 776                 }
 777                 (void)printf("%5lu ",
 778                     (unsigned long)rate(sum.v_vm_faults - osum.v_vm_faults));
 779                 (void)printf("%3lu ",
 780                     (unsigned long)rate(sum.v_reactivated - osum.v_reactivated));
 781                 (void)printf("%3lu ",
 782                     (unsigned long)rate(sum.v_swapin + sum.v_vnodein -
 783                     (osum.v_swapin + osum.v_vnodein)));
 784                 (void)printf("%3lu ",
 785                     (unsigned long)rate(sum.v_swapout + sum.v_vnodeout -
 786                     (osum.v_swapout + osum.v_vnodeout)));
 787                 (void)printf("%5lu ",
 788                     (unsigned long)rate(sum.v_tfree - osum.v_tfree));
 789                 (void)printf("%3lu ",
 790                     (unsigned long)rate(sum.v_pdpages - osum.v_pdpages));
 791                 devstats();
 792                 (void)printf("%4lu %4lu %4lu",
 793                     (unsigned long)rate(sum.v_intr - osum.v_intr),
 794                     (unsigned long)rate(sum.v_syscall - osum.v_syscall),
 795                     (unsigned long)rate(sum.v_swtch - osum.v_swtch));
 796                 if (Pflag)
 797                         pcpustats(ncpus, cpumask, maxid);
 798                 else
 799                         cpustats();
 800                 (void)printf("\n");
 801                 (void)fflush(stdout);
 802                 if (reps >= 0 && --reps <= 0)
 803                         break;
 804                 osum = sum;
 805                 uptime = interval;
 806                 rate_adj = 1000;
 807                 /*
 808                  * We round upward to avoid losing low-frequency events
 809                  * (i.e., >= 1 per interval but < 1 per millisecond).
 810                  */
 811                 if (interval != 1)
 812                         halfuptime = (uptime + 1) / 2;
 813                 else
 814                         halfuptime = 0;
 815                 (void)usleep(interval * 1000);
 816         }
 817 }
 818
 819 static void
 820 printhdr(int maxid, u_long cpumask)
 821 {
 822         int i, num_shown;
 823
 824         num_shown = (num_selected < maxshowdevs) ? num_selected : maxshowdevs;
 825         (void)printf(" procs      memory      page%*s", 19, "");
 826         if (num_shown > 1)
 827                 (void)printf(" disks %*s", num_shown * 4 - 7, "");
 828         else if (num_shown == 1)
 829                 (void)printf("disk");
 830         (void)printf("   faults         ");
 831         if (Pflag) {
 832                 for (i = 0; i <= maxid; i++) {
 833                         if (cpumask & (1ul << i))
 834                                 printf("cpu%-2d    ", i);
 835                 }
 836                 printf("\n");
 837         } else
 838                 printf("cpu\n");
 839         (void)printf(" r b w     avm    fre   flt  re  pi  po    fr  sr ");
 840         for (i = 0; i < num_devices; i++)
 841                 if ((dev_select[i].selected)
 842                  && (dev_select[i].selected <= maxshowdevs))
 843                         (void)printf("%c%c%d ", dev_select[i].device_name[0],
 844                                      dev_select[i].device_name[1],
 845                                      dev_select[i].unit_number);
 846         (void)printf("  in   sy   cs");
 847         if (Pflag) {
 848                 for (i = 0; i <= maxid; i++) {
 849                         if (cpumask & (1ul << i))
 850                                 printf(" us sy id");
 851                 }
 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 page faults requiring I/O\n", sum.v_io_faults);
 978         (void)printf("%9u pages affected by kernel thread creation\n", sum.v_kthreadpages);
 979         (void)printf("%9u pages affected by  fork()\n", sum.v_forkpages);
 980         (void)printf("%9u pages affected by vfork()\n", sum.v_vforkpages);
 981         (void)printf("%9u pages affected by rfork()\n", sum.v_rforkpages);
 982         (void)printf("%9u pages cached\n", sum.v_tcached);
 983         (void)printf("%9u pages freed\n", sum.v_tfree);
 984         (void)printf("%9u pages freed by daemon\n", sum.v_dfree);
 985         (void)printf("%9u pages freed by exiting processes\n", sum.v_pfree);
 986         (void)printf("%9u pages active\n", sum.v_active_count);
 987         (void)printf("%9u pages inactive\n", sum.v_inactive_count);
 988         (void)printf("%9u pages in VM cache\n", sum.v_cache_count);
 989         (void)printf("%9u pages wired down\n", sum.v_wire_count);
 990         (void)printf("%9u pages free\n", sum.v_free_count);
 991         (void)printf("%9u bytes per page\n", sum.v_page_size);
 992         if (kd != NULL) {
 993                 kread(X_NCHSTATS, &lnchstats, sizeof(lnchstats));
 994         } else {
 995                 size_t size = sizeof(lnchstats);
 996                 mysysctl("vfs.cache.nchstats", &lnchstats, &size, NULL, 0);
 997                 if (size != sizeof(lnchstats))
 998                         errx(1, "vfs.cache.nchstats size mismatch");
 999         }
1000         nchtotal = lnchstats.ncs_goodhits + lnchstats.ncs_neghits +
1001             lnchstats.ncs_badhits + lnchstats.ncs_falsehits +
1002             lnchstats.ncs_miss + lnchstats.ncs_long;
1003         (void)printf("%9ld total name lookups\n", nchtotal);
1004         (void)printf(
1005             "%9s cache hits (%ld%% pos + %ld%% neg) system %ld%% per-directory\n",
1006             "", PCT(lnchstats.ncs_goodhits, nchtotal),
1007             PCT(lnchstats.ncs_neghits, nchtotal),
1008             PCT(lnchstats.ncs_pass2, nchtotal));
1009         (void)printf("%9s deletions %ld%%, falsehits %ld%%, toolong %ld%%\n", "",
1010             PCT(lnchstats.ncs_badhits, nchtotal),
1011             PCT(lnchstats.ncs_falsehits, nchtotal),
1012             PCT(lnchstats.ncs_long, nchtotal));
1013 }
1014
1015 static void
1016 doforkst(void)
1017 {
1018         fill_vmmeter(&sum);
1019         (void)printf("%u forks, %u pages, average %.2f\n",
1020             sum.v_forks, sum.v_forkpages,
1021             sum.v_forks == 0 ? 0.0 :
1022             (double)sum.v_forkpages / sum.v_forks);
1023         (void)printf("%u vforks, %u pages, average %.2f\n",
1024             sum.v_vforks, sum.v_vforkpages,
1025             sum.v_vforks == 0 ? 0.0 :
1026             (double)sum.v_vforkpages / sum.v_vforks);
1027         (void)printf("%u rforks, %u pages, average %.2f\n",
1028             sum.v_rforks, sum.v_rforkpages,
1029             sum.v_rforks == 0 ? 0.0 :
1030             (double)sum.v_rforkpages / sum.v_rforks);
1031 }
1032
1033 static void
1034 devstats(void)
1035 {
1036         int dn, state;
1037         long double transfers_per_second;
1038         long double busy_seconds;
1039         long tmp;
1040
1041         for (state = 0; state < CPUSTATES; ++state) {
1042                 tmp = cur.cp_time[state];
1043                 cur.cp_time[state] -= last.cp_time[state];
1044                 last.cp_time[state] = tmp;
1045         }
1046
1047         busy_seconds = cur.snap_time - last.snap_time;
1048
1049         for (dn = 0; dn < num_devices; dn++) {
1050                 int di;
1051
1052                 if ((dev_select[dn].selected == 0)
1053                  || (dev_select[dn].selected > maxshowdevs))
1054                         continue;
1055
1056                 di = dev_select[dn].position;
1057
1058                 if (devstat_compute_statistics(&cur.dinfo->devices[di],
1059                     &last.dinfo->devices[di], busy_seconds,
1060                     DSM_TRANSFERS_PER_SECOND, &transfers_per_second,
1061                     DSM_NONE) != 0)
1062                         errx(1, "%s", devstat_errbuf);
1063
1064                 (void)printf("%3.0Lf ", transfers_per_second);
1065         }
1066 }
1067
1068 static void
1069 percent(double pct, int *over)
1070 {
1071         char buf[10];
1072         int l;
1073
1074         l = snprintf(buf, sizeof(buf), "%.0f", pct);
1075         if (l == 1 && *over) {
1076                 printf("%s",  buf);
1077                 (*over)--;
1078         } else
1079                 printf("%2s", buf);
1080         if (l > 2)
1081                 (*over)++;
1082 }
1083
1084 static void
1085 cpustats(void)
1086 {
1087         int state, over;
1088         double lpct, total;
1089
1090         total = 0;
1091         for (state = 0; state < CPUSTATES; ++state)
1092                 total += cur.cp_time[state];
1093         if (total)
1094                 lpct = 100.0 / total;
1095         else
1096                 lpct = 0.0;
1097         over = 0;
1098         printf(" ");
1099         percent((cur.cp_time[CP_USER] + cur.cp_time[CP_NICE]) * lpct, &over);
1100         printf(" ");
1101         percent((cur.cp_time[CP_SYS] + cur.cp_time[CP_INTR]) * lpct, &over);
1102         printf(" ");
1103         percent(cur.cp_time[CP_IDLE] * lpct, &over);
1104 }
1105
1106 static void
1107 pcpustats(int ncpus, u_long cpumask, int maxid)
1108 {
1109         int state, i;
1110         double lpct, total;
1111         long tmp;
1112         int over;
1113
1114         /* devstats does this for cp_time */
1115         for (i = 0; i <= maxid; i++) {
1116                 if ((cpumask & (1ul << i)) == 0)
1117                         continue;
1118                 for (state = 0; state < CPUSTATES; ++state) {
1119                         tmp = cur_cp_times[i * CPUSTATES + state];
1120                         cur_cp_times[i * CPUSTATES + state] -= last_cp_times[i * CPUSTATES + state];
1121                         last_cp_times[i * CPUSTATES + state] = tmp;
1122                 }
1123         }
1124
1125         over = 0;
1126         for (i = 0; i <= maxid; i++) {
1127                 if ((cpumask & (1ul << i)) == 0)
1128                         continue;
1129                 total = 0;
1130                 for (state = 0; state < CPUSTATES; ++state)
1131                         total += cur_cp_times[i * CPUSTATES + state];
1132                 if (total)
1133                         lpct = 100.0 / total;
1134                 else
1135                         lpct = 0.0;
1136                 printf(" ");
1137                 percent((cur_cp_times[i * CPUSTATES + CP_USER] +
1138                          cur_cp_times[i * CPUSTATES + CP_NICE]) * lpct, &over);
1139                 printf(" ");
1140                 percent((cur_cp_times[i * CPUSTATES + CP_SYS] +
1141                          cur_cp_times[i * CPUSTATES + CP_INTR]) * lpct, &over);
1142                 printf(" ");
1143                 percent(cur_cp_times[i * CPUSTATES + CP_IDLE] * lpct, &over);
1144         }
1145 }
1146
1147 static void
1148 dointr(void)
1149 {
1150         unsigned long *intrcnt, uptime;
1151         uint64_t inttotal;
1152         size_t clen, inamlen, intrcntlen, istrnamlen;
1153         unsigned int i, nintr;
1154         char *intrname, *tintrname;
1155
1156         uptime = getuptime();
1157         if (kd != NULL) {
1158                 kread(X_SINTRCNT, &intrcntlen, sizeof(intrcntlen));
1159                 kread(X_SINTRNAMES, &inamlen, sizeof(inamlen));
1160                 if ((intrcnt = malloc(intrcntlen)) == NULL ||
1161                     (intrname = malloc(inamlen)) == NULL)
1162                         err(1, "malloc()");
1163                 kread(X_INTRCNT, intrcnt, intrcntlen);
1164                 kread(X_INTRNAMES, intrname, inamlen);
1165         } else {
1166                 for (intrcnt = NULL, intrcntlen = 1024; ; intrcntlen *= 2) {
1167                         if ((intrcnt = reallocf(intrcnt, intrcntlen)) == NULL)
1168                                 err(1, "reallocf()");
1169                         if (mysysctl("hw.intrcnt",
1170                             intrcnt, &intrcntlen, NULL, 0) == 0)
1171                                 break;
1172                 }
1173                 for (intrname = NULL, inamlen = 1024; ; inamlen *= 2) {
1174                         if ((intrname = reallocf(intrname, inamlen)) == NULL)
1175                                 err(1, "reallocf()");
1176                         if (mysysctl("hw.intrnames",
1177                             intrname, &inamlen, NULL, 0) == 0)
1178                                 break;
1179                 }
1180         }
1181         nintr = intrcntlen / sizeof(unsigned long);
1182         tintrname = intrname;
1183         istrnamlen = strlen("interrupt");
1184         for (i = 0; i < nintr; i++) {
1185                 clen = strlen(tintrname);
1186                 if (clen > istrnamlen)
1187                         istrnamlen = clen;
1188                 tintrname += clen + 1;
1189         }
1190         (void)printf("%-*s %20s %10s\n", (int)istrnamlen, "interrupt", "total",
1191             "rate");
1192         inttotal = 0;
1193         for (i = 0; i < nintr; i++) {
1194                 if (intrname[0] != '\0' && (*intrcnt != 0 || aflag))
1195                         (void)printf("%-*s %20lu %10lu\n", (int)istrnamlen,
1196                             intrname, *intrcnt, *intrcnt / uptime);
1197                 intrname += strlen(intrname) + 1;
1198                 inttotal += *intrcnt++;
1199         }
1200         (void)printf("%-*s %20" PRIu64 " %10" PRIu64 "\n", (int)istrnamlen,
1201             "Total", inttotal, inttotal / uptime);
1202 }
1203
1204 static void
1205 domemstat_malloc(void)
1206 {
1207         struct memory_type_list *mtlp;
1208         struct memory_type *mtp;
1209         int error, first, i;
1210
1211         mtlp = memstat_mtl_alloc();
1212         if (mtlp == NULL) {
1213                 warn("memstat_mtl_alloc");
1214                 return;
1215         }
1216         if (kd == NULL) {
1217                 if (memstat_sysctl_malloc(mtlp, 0) < 0) {
1218                         warnx("memstat_sysctl_malloc: %s",
1219                             memstat_strerror(memstat_mtl_geterror(mtlp)));
1220                         return;
1221                 }
1222         } else {
1223                 if (memstat_kvm_malloc(mtlp, kd) < 0) {
1224                         error = memstat_mtl_geterror(mtlp);
1225                         if (error == MEMSTAT_ERROR_KVM)
1226                                 warnx("memstat_kvm_malloc: %s",
1227                                     kvm_geterr(kd));
1228                         else
1229                                 warnx("memstat_kvm_malloc: %s",
1230                                     memstat_strerror(error));
1231                 }
1232         }
1233         printf("%13s %5s %6s %7s %8s  Size(s)\n", "Type", "InUse", "MemUse",
1234             "HighUse", "Requests");
1235         for (mtp = memstat_mtl_first(mtlp); mtp != NULL;
1236             mtp = memstat_mtl_next(mtp)) {
1237                 if (memstat_get_numallocs(mtp) == 0 &&
1238                     memstat_get_count(mtp) == 0)
1239                         continue;
1240                 printf("%13s %5" PRIu64 " %5" PRIu64 "K %7s %8" PRIu64 "  ",
1241                     memstat_get_name(mtp), memstat_get_count(mtp),
1242                     (memstat_get_bytes(mtp) + 1023) / 1024, "-",
1243                     memstat_get_numallocs(mtp));
1244                 first = 1;
1245                 for (i = 0; i < 32; i++) {
1246                         if (memstat_get_sizemask(mtp) & (1 << i)) {
1247                                 if (!first)
1248                                         printf(",");
1249                                 printf("%d", 1 << (i + 4));
1250                                 first = 0;
1251                         }
1252                 }
1253                 printf("\n");
1254         }
1255         memstat_mtl_free(mtlp);
1256 }
1257
1258 static void
1259 domemstat_zone(void)
1260 {
1261         struct memory_type_list *mtlp;
1262         struct memory_type *mtp;
1263         char name[MEMTYPE_MAXNAME + 1];
1264         int error;
1265
1266         mtlp = memstat_mtl_alloc();
1267         if (mtlp == NULL) {
1268                 warn("memstat_mtl_alloc");
1269                 return;
1270         }
1271         if (kd == NULL) {
1272                 if (memstat_sysctl_uma(mtlp, 0) < 0) {
1273                         warnx("memstat_sysctl_uma: %s",
1274                             memstat_strerror(memstat_mtl_geterror(mtlp)));
1275                         return;
1276                 }
1277         } else {
1278                 if (memstat_kvm_uma(mtlp, kd) < 0) {
1279                         error = memstat_mtl_geterror(mtlp);
1280                         if (error == MEMSTAT_ERROR_KVM)
1281                                 warnx("memstat_kvm_uma: %s",
1282                                     kvm_geterr(kd));
1283                         else
1284                                 warnx("memstat_kvm_uma: %s",
1285                                     memstat_strerror(error));
1286                 }
1287         }
1288         printf("%-20s %6s %6s %8s %8s %8s %4s %4s\n\n", "ITEM", "SIZE",
1289             "LIMIT", "USED", "FREE", "REQ", "FAIL", "SLEEP");
1290         for (mtp = memstat_mtl_first(mtlp); mtp != NULL;
1291             mtp = memstat_mtl_next(mtp)) {
1292                 strlcpy(name, memstat_get_name(mtp), MEMTYPE_MAXNAME);
1293                 strcat(name, ":");
1294                 printf("%-20s %6" PRIu64 ", %6" PRIu64 ",%8" PRIu64 ",%8" PRIu64
1295                     ",%8" PRIu64 ",%4" PRIu64 ",%4" PRIu64 "\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                     memstat_get_sleeps(mtp));
1300         }
1301         memstat_mtl_free(mtlp);
1302         printf("\n");
1303 }
1304
1305 /*
1306  * kread reads something from the kernel, given its nlist index.
1307  */
1308 static void
1309 kreado(int nlx, void *addr, size_t size, size_t offset)
1310 {
1311         const char *sym;
1312
1313         if (namelist[nlx].n_type == 0 || namelist[nlx].n_value == 0) {
1314                 sym = namelist[nlx].n_name;
1315                 if (*sym == '_')
1316                         ++sym;
1317                 errx(1, "symbol %s not defined", sym);
1318         }
1319         if ((size_t)kvm_read(kd, namelist[nlx].n_value + offset, addr,
1320             size) != size) {
1321                 sym = namelist[nlx].n_name;
1322                 if (*sym == '_')
1323                         ++sym;
1324                 errx(1, "%s: %s", sym, kvm_geterr(kd));
1325         }
1326 }
1327
1328 static void
1329 kread(int nlx, void *addr, size_t size)
1330 {
1331         kreado(nlx, addr, size, 0);
1332 }
1333
1334 static char *
1335 kgetstr(const char *strp)
1336 {
1337         int n = 0, size = 1;
1338         char *ret = NULL;
1339
1340         do {
1341                 if (size == n + 1) {
1342                         ret = realloc(ret, size);
1343                         if (ret == NULL)
1344                                 err(1, "%s: realloc", __func__);
1345                         size *= 2;
1346                 }
1347                 if (kvm_read(kd, (u_long)strp + n, &ret[n], 1) != 1)
1348                         errx(1, "%s: %s", __func__, kvm_geterr(kd));
1349         } while (ret[n++] != '\0');
1350         return (ret);
1351 }
1352
1353 static void
1354 usage(void)
1355 {
1356         (void)fprintf(stderr, "%s%s",
1357                 "usage: vmstat [-afHhimPsz] [-c count] [-M core [-N system]] [-w wait]\n",
1358                 "              [-n devs] [-p type,if,pass] [disks]\n");
1359         exit(1);
1360 }