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 #ifndef lint
  41 #if 0
  42 static char sccsid[] = "@(#)vmstat.c    8.1 (Berkeley) 6/6/93";
  43 #endif
  44 static const char rcsid[] =
  45   "$FreeBSD$";
  46 #endif /* not lint */
  47
  48 #include <sys/param.h>
  49 #include <sys/time.h>
  50 #include <sys/proc.h>
  51 #include <sys/dkstat.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/sysctl.h>
  59 #include <sys/vmmeter.h>
  60
  61 #include <vm/vm_param.h>
  62 #include <vm/vm_zone.h>
  63
  64 #include <ctype.h>
  65 #include <err.h>
  66 #include <errno.h>
  67 #include <kvm.h>
  68 #include <limits.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 <devstat.h>
  78
  79 struct nlist namelist[] = {
  80 #define X_CPTIME        0
  81         { "_cp_time" },
  82 #define X_SUM           1
  83         { "_cnt" },
  84 #define X_BOOTTIME      2
  85         { "_boottime" },
  86 #define X_HZ            3
  87         { "_hz" },
  88 #define X_STATHZ        4
  89         { "_stathz" },
  90 #define X_NCHSTATS      5
  91         { "_nchstats" },
  92 #define X_INTRNAMES     6
  93         { "_intrnames" },
  94 #define X_EINTRNAMES    7
  95         { "_eintrnames" },
  96 #define X_INTRCNT       8
  97         { "_intrcnt" },
  98 #define X_EINTRCNT      9
  99         { "_eintrcnt" },
 100 #define X_KMEMSTATISTICS        10
 101         { "_kmemstatistics" },
 102 #define X_KMEMBUCKETS   11
 103         { "_bucket" },
 104 #define X_ZLIST         12
 105         { "_zlist" },
 106 #ifdef notyet
 107 #define X_DEFICIT       13
 108         { "_deficit" },
 109 #define X_FORKSTAT      14
 110         { "_forkstat" },
 111 #define X_REC           15
 112         { "_rectime" },
 113 #define X_PGIN          16
 114         { "_pgintime" },
 115 #define X_XSTATS        17
 116         { "_xstats" },
 117 #define X_END           18
 118 #else
 119 #define X_END           13
 120 #endif
 121         { "" },
 122 };
 123
 124 struct statinfo cur, last;
 125 int num_devices, maxshowdevs;
 126 long generation;
 127 struct device_selection *dev_select;
 128 int num_selected;
 129 struct devstat_match *matches;
 130 int num_matches = 0;
 131 int num_devices_specified, num_selections;
 132 long select_generation;
 133 char **specified_devices;
 134 devstat_select_mode select_mode;
 135
 136 struct  vmmeter sum, osum;
 137
 138 int     winlines = 20;
 139 int     nflag = 0;
 140
 141 kvm_t *kd;
 142
 143 #define FORKSTAT        0x01
 144 #define INTRSTAT        0x02
 145 #define MEMSTAT         0x04
 146 #define SUMSTAT         0x08
 147 #define TIMESTAT        0x10
 148 #define VMSTAT          0x20
 149 #define ZMEMSTAT        0x40
 150
 151 void    cpustats(), dointr(), domem(), dosum(), dozmem();
 152 void    dovmstat(), kread(), usage();
 153 #ifdef notyet
 154 void    dotimes(), doforkst();
 155 #endif
 156 void printhdr __P((void));
 157 static void devstats();
 158
 159 int
 160 main(argc, argv)
 161         register int argc;
 162         register char **argv;
 163 {
 164         register int c, todo;
 165         u_int interval;
 166         int reps;
 167         char *memf, *nlistf;
 168         char errbuf[_POSIX2_LINE_MAX];
 169         char *err_str;
 170
 171         memf = nlistf = NULL;
 172         interval = reps = todo = 0;
 173         maxshowdevs = 2;
 174         while ((c = getopt(argc, argv, "c:fiM:mN:n:p:stw:z")) != -1) {
 175                 switch (c) {
 176                 case 'c':
 177                         reps = atoi(optarg);
 178                         break;
 179                 case 'f':
 180 #ifdef notyet
 181                         todo |= FORKSTAT;
 182 #else
 183                         errx(EX_USAGE, "sorry, -f is not (re)implemented yet");
 184 #endif
 185                         break;
 186                 case 'i':
 187                         todo |= INTRSTAT;
 188                         break;
 189                 case 'M':
 190                         memf = optarg;
 191                         break;
 192                 case 'm':
 193                         todo |= MEMSTAT;
 194                         break;
 195                 case 'N':
 196                         nlistf = optarg;
 197                         break;
 198                 case 'n':
 199                         nflag = 1;
 200                         maxshowdevs = atoi(optarg);
 201                         if (maxshowdevs < 0)
 202                                 errx(1, "number of devices %d is < 0",
 203                                      maxshowdevs);
 204                         break;
 205                 case 'p':
 206                         if (buildmatch(optarg, &matches, &num_matches) != 0)
 207                                 errx(1, "%s", devstat_errbuf);
 208                         break;
 209                 case 's':
 210                         todo |= SUMSTAT;
 211                         break;
 212                 case 't':
 213 #ifdef notyet
 214                         todo |= TIMESTAT;
 215 #else
 216                         errx(EX_USAGE, "sorry, -t is not (re)implemented yet");
 217 #endif
 218                         break;
 219                 case 'w':
 220                         interval = atoi(optarg);
 221                         break;
 222                 case 'z':
 223                         todo |= ZMEMSTAT;
 224                         break;
 225                 case '?':
 226                 default:
 227                         usage();
 228                 }
 229         }
 230         argc -= optind;
 231         argv += optind;
 232
 233         if (todo == 0)
 234                 todo = VMSTAT;
 235
 236         /*
 237          * Discard setgid privileges if not the running kernel so that bad
 238          * guys can't print interesting stuff from kernel memory.
 239          */
 240         if (nlistf != NULL || memf != NULL)
 241                 setgid(getgid());
 242
 243         kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf);
 244         if (kd == 0)
 245                 errx(1, "kvm_openfiles: %s", errbuf);
 246
 247         if ((c = kvm_nlist(kd, namelist)) != 0) {
 248                 if (c > 0) {
 249                         warnx("undefined symbols:");
 250                         for (c = 0;
 251                             c < sizeof(namelist)/sizeof(namelist[0]); c++)
 252                                 if (namelist[c].n_type == 0)
 253                                         fprintf(stderr, " %s",
 254                                             namelist[c].n_name);
 255                         (void)fputc('\n', stderr);
 256                 } else
 257                         warnx("kvm_nlist: %s", kvm_geterr(kd));
 258                 exit(1);
 259         }
 260
 261         if (todo & VMSTAT) {
 262                 char **getdrivedata();
 263                 struct winsize winsize;
 264
 265                 /*
 266                  * Make sure that the userland devstat version matches the
 267                  * kernel devstat version.  If not, exit and print a
 268                  * message informing the user of his mistake.
 269                  */
 270                 if (checkversion() < 0)
 271                         errx(1, "%s", devstat_errbuf);
 272
 273
 274                 argv = getdrivedata(argv);
 275                 winsize.ws_row = 0;
 276                 (void) ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&winsize);
 277                 if (winsize.ws_row > 0)
 278                         winlines = winsize.ws_row;
 279
 280         }
 281
 282 #define BACKWARD_COMPATIBILITY
 283 #ifdef  BACKWARD_COMPATIBILITY
 284         if (*argv) {
 285                 interval = atoi(*argv);
 286                 if (*++argv)
 287                         reps = atoi(*argv);
 288         }
 289 #endif
 290
 291         if (interval) {
 292                 if (!reps)
 293                         reps = -1;
 294         } else if (reps)
 295                 interval = 1;
 296
 297 #ifdef notyet
 298         if (todo & FORKSTAT)
 299                 doforkst();
 300 #endif
 301         if (todo & MEMSTAT)
 302                 domem();
 303         if (todo & ZMEMSTAT)
 304                 dozmem();
 305         if (todo & SUMSTAT)
 306                 dosum();
 307 #ifdef notyet
 308         if (todo & TIMESTAT)
 309                 dotimes();
 310 #endif
 311         if (todo & INTRSTAT)
 312                 dointr();
 313         if (todo & VMSTAT)
 314                 dovmstat(interval, reps);
 315         exit(0);
 316 }
 317
 318 char **
 319 getdrivedata(argv)
 320         char **argv;
 321 {
 322         register int i;
 323         char buf[30];
 324
 325         if ((num_devices = getnumdevs()) < 0)
 326                 errx(1, "%s", devstat_errbuf);
 327
 328         cur.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
 329         last.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
 330         bzero(cur.dinfo, sizeof(struct devinfo));
 331         bzero(last.dinfo, sizeof(struct devinfo));
 332
 333         if (getdevs(&cur) == -1)
 334                 errx(1, "%s", devstat_errbuf);
 335
 336         num_devices = cur.dinfo->numdevs;
 337         generation = cur.dinfo->generation;
 338
 339         specified_devices = (char **)malloc(sizeof(char *));
 340         for (num_devices_specified = 0; *argv; ++argv) {
 341                 if (isdigit(**argv))
 342                         break;
 343                 num_devices_specified++;
 344                 specified_devices = (char **)realloc(specified_devices,
 345                                                      sizeof(char *) *
 346                                                      num_devices_specified);
 347                 specified_devices[num_devices_specified - 1] = *argv;
 348         }
 349         dev_select = NULL;
 350
 351         if (nflag == 0 && maxshowdevs < num_devices_specified)
 352                         maxshowdevs = num_devices_specified;
 353
 354         /*
 355          * People are generally only interested in disk statistics when
 356          * they're running vmstat.  So, that's what we're going to give
 357          * them if they don't specify anything by default.  We'll also give
 358          * them any other random devices in the system so that we get to
 359          * maxshowdevs devices, if that many devices exist.  If the user
 360          * specifies devices on the command line, either through a pattern
 361          * match or by naming them explicitly, we will give the user only
 362          * those devices.
 363          */
 364         if ((num_devices_specified == 0) && (num_matches == 0)) {
 365                 if (buildmatch("da", &matches, &num_matches) != 0)
 366                         errx(1, "%s", devstat_errbuf);
 367
 368                 select_mode = DS_SELECT_ADD;
 369         } else
 370                 select_mode = DS_SELECT_ONLY;
 371
 372         /*
 373          * At this point, selectdevs will almost surely indicate that the
 374          * device list has changed, so we don't look for return values of 0
 375          * or 1.  If we get back -1, though, there is an error.
 376          */
 377         if (selectdevs(&dev_select, &num_selected, &num_selections,
 378                        &select_generation, generation, cur.dinfo->devices,
 379                        num_devices, matches, num_matches, specified_devices,
 380                        num_devices_specified, select_mode,
 381                        maxshowdevs, 0) == -1)
 382                 errx(1, "%s", devstat_errbuf);
 383
 384         return(argv);
 385 }
 386
 387 long
 388 getuptime()
 389 {
 390         static time_t now, boottime;
 391         time_t uptime;
 392
 393         if (boottime == 0)
 394                 kread(X_BOOTTIME, &boottime, sizeof(boottime));
 395         (void)time(&now);
 396         uptime = now - boottime;
 397         if (uptime <= 0 || uptime > 60*60*24*365*10)
 398                 errx(1, "time makes no sense; namelist must be wrong");
 399         return(uptime);
 400 }
 401
 402 int     hz, hdrcnt;
 403
 404 void
 405 dovmstat(interval, reps)
 406         u_int interval;
 407         int reps;
 408 {
 409         struct vmtotal total;
 410         time_t uptime, halfuptime;
 411         struct devinfo *tmp_dinfo;
 412         void needhdr();
 413         int mib[2], size;
 414
 415         uptime = getuptime();
 416         halfuptime = uptime / 2;
 417         (void)signal(SIGCONT, needhdr);
 418
 419         if (namelist[X_STATHZ].n_type != 0 && namelist[X_STATHZ].n_value != 0)
 420                 kread(X_STATHZ, &hz, sizeof(hz));
 421         if (!hz)
 422                 kread(X_HZ, &hz, sizeof(hz));
 423
 424         for (hdrcnt = 1;;) {
 425                 if (!--hdrcnt)
 426                         printhdr();
 427                 kread(X_CPTIME, cur.cp_time, sizeof(cur.cp_time));
 428
 429                 tmp_dinfo = last.dinfo;
 430                 last.dinfo = cur.dinfo;
 431                 cur.dinfo = tmp_dinfo;
 432                 last.busy_time = cur.busy_time;
 433
 434                 /*
 435                  * Here what we want to do is refresh our device stats.
 436                  * getdevs() returns 1 when the device list has changed.
 437                  * If the device list has changed, we want to go through
 438                  * the selection process again, in case a device that we
 439                  * were previously displaying has gone away.
 440                  */
 441                 switch (getdevs(&cur)) {
 442                 case -1:
 443                         errx(1, "%s", devstat_errbuf);
 444                         break;
 445                 case 1: {
 446                         int retval;
 447
 448                         num_devices = cur.dinfo->numdevs;
 449                         generation = cur.dinfo->generation;
 450
 451                         retval = selectdevs(&dev_select, &num_selected,
 452                                             &num_selections, &select_generation,
 453                                             generation, cur.dinfo->devices,
 454                                             num_devices, matches, num_matches,
 455                                             specified_devices,
 456                                             num_devices_specified, select_mode,
 457                                             maxshowdevs, 0);
 458                         switch (retval) {
 459                         case -1:
 460                                 errx(1, "%s", devstat_errbuf);
 461                                 break;
 462                         case 1:
 463                                 printhdr();
 464                                 break;
 465                         default:
 466                                 break;
 467                         }
 468                 }
 469                 default:
 470                         break;
 471                 }
 472
 473                 kread(X_SUM, &sum, sizeof(sum));
 474                 size = sizeof(total);
 475                 mib[0] = CTL_VM;
 476                 mib[1] = VM_METER;
 477                 if (sysctl(mib, 2, &total, &size, NULL, 0) < 0) {
 478                         printf("Can't get kerninfo: %s\n", strerror(errno));
 479                         bzero(&total, sizeof(total));
 480                 }
 481                 (void)printf("%2d%2d%2d",
 482                     total.t_rq - 1, total.t_dw + total.t_pw, total.t_sw);
 483 #define pgtok(a) ((a) * sum.v_page_size >> 10)
 484 #define rate(x) (((x) + halfuptime) / uptime)   /* round */
 485                 (void)printf("%8ld%6ld ",
 486                     (long)pgtok(total.t_avm), (long)pgtok(total.t_free));
 487                 (void)printf("%4lu ",
 488                     (u_long)rate(sum.v_vm_faults - osum.v_vm_faults));
 489                 (void)printf("%3lu ",
 490                     (u_long)rate(sum.v_reactivated - osum.v_reactivated));
 491                 (void)printf("%3lu ",
 492                     (u_long)rate(sum.v_swapin + sum.v_vnodein -
 493                     (osum.v_swapin + osum.v_vnodein)));
 494                 (void)printf("%3lu ",
 495                     (u_long)rate(sum.v_swapout + sum.v_vnodeout -
 496                     (osum.v_swapout + osum.v_vnodeout)));
 497                 (void)printf("%3lu ",
 498                     (u_long)rate(sum.v_tfree - osum.v_tfree));
 499                 (void)printf("%3lu ",
 500                     (u_long)rate(sum.v_pdpages - osum.v_pdpages));
 501                 devstats();
 502                 (void)printf("%4lu %4lu %3lu ",
 503                     (u_long)rate(sum.v_intr - osum.v_intr),
 504                     (u_long)rate(sum.v_syscall - osum.v_syscall),
 505                     (u_long)rate(sum.v_swtch - osum.v_swtch));
 506                 cpustats();
 507                 (void)printf("\n");
 508                 (void)fflush(stdout);
 509                 if (reps >= 0 && --reps <= 0)
 510                         break;
 511                 osum = sum;
 512                 uptime = interval;
 513                 /*
 514                  * We round upward to avoid losing low-frequency events
 515                  * (i.e., >= 1 per interval but < 1 per second).
 516                  */
 517                 if (interval != 1)
 518                         halfuptime = (uptime + 1) / 2;
 519                 else
 520                         halfuptime = 0;
 521                 (void)sleep(interval);
 522         }
 523 }
 524
 525 void
 526 printhdr()
 527 {
 528         int i, num_shown;
 529
 530         num_shown = (num_selected < maxshowdevs) ? num_selected : maxshowdevs;
 531         (void)printf(" procs      memory     page%*s", 19, "");
 532         if (num_shown > 1)
 533                 (void)printf(" disks %*s", num_shown * 4 - 7, "");
 534         else if (num_shown == 1)
 535                 (void)printf("disk");
 536         (void)printf("   faults      cpu\n");
 537         (void)printf(" r b w     avm   fre  flt  re  pi  po  fr  sr ");
 538         for (i = 0; i < num_devices; i++)
 539                 if ((dev_select[i].selected)
 540                  && (dev_select[i].selected <= maxshowdevs))
 541                         (void)printf("%c%c%d ", dev_select[i].device_name[0],
 542                                      dev_select[i].device_name[1],
 543                                      dev_select[i].unit_number);
 544         (void)printf("  in   sy  cs us sy id\n");
 545         hdrcnt = winlines - 2;
 546 }
 547
 548 /*
 549  * Force a header to be prepended to the next output.
 550  */
 551 void
 552 needhdr()
 553 {
 554
 555         hdrcnt = 1;
 556 }
 557
 558 #ifdef notyet
 559 void
 560 dotimes()
 561 {
 562         u_int pgintime, rectime;
 563
 564         kread(X_REC, &rectime, sizeof(rectime));
 565         kread(X_PGIN, &pgintime, sizeof(pgintime));
 566         kread(X_SUM, &sum, sizeof(sum));
 567         (void)printf("%u reclaims, %u total time (usec)\n",
 568             sum.v_pgrec, rectime);
 569         (void)printf("average: %u usec / reclaim\n", rectime / sum.v_pgrec);
 570         (void)printf("\n");
 571         (void)printf("%u page ins, %u total time (msec)\n",
 572             sum.v_pgin, pgintime / 10);
 573         (void)printf("average: %8.1f msec / page in\n",
 574             pgintime / (sum.v_pgin * 10.0));
 575 }
 576 #endif
 577
 578 long
 579 pct(top, bot)
 580         long top, bot;
 581 {
 582         long ans;
 583
 584         if (bot == 0)
 585                 return(0);
 586         ans = (quad_t)top * 100 / bot;
 587         return (ans);
 588 }
 589
 590 #define PCT(top, bot) pct((long)(top), (long)(bot))
 591
 592 void
 593 dosum()
 594 {
 595         struct nchstats nchstats;
 596         long nchtotal;
 597
 598         kread(X_SUM, &sum, sizeof(sum));
 599         (void)printf("%9u cpu context switches\n", sum.v_swtch);
 600         (void)printf("%9u device interrupts\n", sum.v_intr);
 601         (void)printf("%9u software interrupts\n", sum.v_soft);
 602         (void)printf("%9u traps\n", sum.v_trap);
 603         (void)printf("%9u system calls\n", sum.v_syscall);
 604         (void)printf("%9u swap pager pageins\n", sum.v_swapin);
 605         (void)printf("%9u swap pager pages paged in\n", sum.v_swappgsin);
 606         (void)printf("%9u swap pager pageouts\n", sum.v_swapout);
 607         (void)printf("%9u swap pager pages paged out\n", sum.v_swappgsout);
 608         (void)printf("%9u vnode pager pageins\n", sum.v_vnodein);
 609         (void)printf("%9u vnode pager pages paged in\n", sum.v_vnodepgsin);
 610         (void)printf("%9u vnode pager pageouts\n", sum.v_vnodeout);
 611         (void)printf("%9u vnode pager pages paged out\n", sum.v_vnodepgsout);
 612         (void)printf("%9u page daemon wakeups\n", sum.v_pdwakeups);
 613         (void)printf("%9u pages examined by the page daemon\n", sum.v_pdpages);
 614         (void)printf("%9u pages reactivated\n", sum.v_reactivated);
 615         (void)printf("%9u copy-on-write faults\n", sum.v_cow_faults);
 616         (void)printf("%9u copy-on-write optimized faults\n", sum.v_cow_optim);
 617         (void)printf("%9u zero fill pages zeroed\n", sum.v_zfod);
 618         (void)printf("%9u zero fill pages prezeroed\n", sum.v_ozfod);
 619         (void)printf("%9u intransit blocking page faults\n", sum.v_intrans);
 620         (void)printf("%9u total VM faults taken\n", sum.v_vm_faults);
 621         (void)printf("%9u pages freed\n", sum.v_tfree);
 622         (void)printf("%9u pages freed by daemon\n", sum.v_dfree);
 623         (void)printf("%9u pages freed by exiting processes\n", sum.v_pfree);
 624         (void)printf("%9u pages active\n", sum.v_active_count);
 625         (void)printf("%9u pages inactive\n", sum.v_inactive_count);
 626         (void)printf("%9u pages in VM cache\n", sum.v_cache_count);
 627         (void)printf("%9u pages wired down\n", sum.v_wire_count);
 628         (void)printf("%9u pages free\n", sum.v_free_count);
 629         (void)printf("%9u bytes per page\n", sum.v_page_size);
 630         kread(X_NCHSTATS, &nchstats, sizeof(nchstats));
 631         nchtotal = nchstats.ncs_goodhits + nchstats.ncs_neghits +
 632             nchstats.ncs_badhits + nchstats.ncs_falsehits +
 633             nchstats.ncs_miss + nchstats.ncs_long;
 634         (void)printf("%9ld total name lookups\n", nchtotal);
 635         (void)printf(
 636             "%9s cache hits (%ld%% pos + %ld%% neg) system %ld%% per-directory\n",
 637             "", PCT(nchstats.ncs_goodhits, nchtotal),
 638             PCT(nchstats.ncs_neghits, nchtotal),
 639             PCT(nchstats.ncs_pass2, nchtotal));
 640         (void)printf("%9s deletions %ld%%, falsehits %ld%%, toolong %ld%%\n", "",
 641             PCT(nchstats.ncs_badhits, nchtotal),
 642             PCT(nchstats.ncs_falsehits, nchtotal),
 643             PCT(nchstats.ncs_long, nchtotal));
 644 }
 645
 646 #ifdef notyet
 647 void
 648 doforkst()
 649 {
 650         struct forkstat fks;
 651
 652         kread(X_FORKSTAT, &fks, sizeof(struct forkstat));
 653         (void)printf("%d forks, %d pages, average %.2f\n",
 654             fks.cntfork, fks.sizfork, (double)fks.sizfork / fks.cntfork);
 655         (void)printf("%d vforks, %d pages, average %.2f\n",
 656             fks.cntvfork, fks.sizvfork, (double)fks.sizvfork / fks.cntvfork);
 657 }
 658 #endif
 659
 660 static void
 661 devstats()
 662 {
 663         register int dn, state;
 664         long double transfers_per_second;
 665         long double busy_seconds;
 666         long tmp;
 667
 668         for (state = 0; state < CPUSTATES; ++state) {
 669                 tmp = cur.cp_time[state];
 670                 cur.cp_time[state] -= last.cp_time[state];
 671                 last.cp_time[state] = tmp;
 672         }
 673
 674         busy_seconds = compute_etime(cur.busy_time, last.busy_time);
 675
 676         for (dn = 0; dn < num_devices; dn++) {
 677                 int di;
 678
 679                 if ((dev_select[dn].selected == 0)
 680                  || (dev_select[dn].selected > maxshowdevs))
 681                         continue;
 682
 683                 di = dev_select[dn].position;
 684
 685                 if (compute_stats(&cur.dinfo->devices[di],
 686                                   &last.dinfo->devices[di], busy_seconds,
 687                                   NULL, NULL, NULL,
 688                                   NULL, &transfers_per_second, NULL,
 689                                   NULL, NULL) != 0)
 690                         errx(1, "%s", devstat_errbuf);
 691
 692                 printf("%3.0Lf ", transfers_per_second);
 693         }
 694 }
 695
 696 void
 697 cpustats()
 698 {
 699         register int state;
 700         double pct, total;
 701
 702         total = 0;
 703         for (state = 0; state < CPUSTATES; ++state)
 704                 total += cur.cp_time[state];
 705         if (total)
 706                 pct = 100 / total;
 707         else
 708                 pct = 0;
 709         (void)printf("%2.0f ", (cur.cp_time[CP_USER] +
 710                                 cur.cp_time[CP_NICE]) * pct);
 711         (void)printf("%2.0f ", (cur.cp_time[CP_SYS] +
 712                                 cur.cp_time[CP_INTR]) * pct);
 713         (void)printf("%2.0f", cur.cp_time[CP_IDLE] * pct);
 714 }
 715
 716 void
 717 dointr()
 718 {
 719         register u_long *intrcnt, uptime;
 720         register u_int64_t inttotal;
 721         register int nintr, inamlen;
 722         register char *intrname;
 723
 724         uptime = getuptime();
 725         nintr = namelist[X_EINTRCNT].n_value - namelist[X_INTRCNT].n_value;
 726         inamlen =
 727             namelist[X_EINTRNAMES].n_value - namelist[X_INTRNAMES].n_value;
 728         intrcnt = malloc((size_t)nintr);
 729         intrname = malloc((size_t)inamlen);
 730         if (intrcnt == NULL || intrname == NULL)
 731                 errx(1, "malloc");
 732         kread(X_INTRCNT, intrcnt, (size_t)nintr);
 733         kread(X_INTRNAMES, intrname, (size_t)inamlen);
 734         (void)printf("interrupt      total      rate\n");
 735         inttotal = 0;
 736         nintr /= sizeof(long);
 737         while (--nintr >= 0) {
 738                 if (*intrcnt)
 739                         (void)printf("%-12s %8lu %8lu\n", intrname,
 740                             *intrcnt, *intrcnt / uptime);
 741                 intrname += strlen(intrname) + 1;
 742                 inttotal += *intrcnt++;
 743         }
 744         (void)printf("Total        %8llu %8llu\n", inttotal,
 745                         inttotal / (u_int64_t) uptime);
 746 }
 747
 748 #define MAX_KMSTATS     200
 749
 750 void
 751 domem()
 752 {
 753         register struct kmembuckets *kp;
 754         register struct malloc_type *ks;
 755         register int i, j;
 756         int len, size, first, nkms;
 757         long totuse = 0, totfree = 0, totreq = 0;
 758         const char *name;
 759         struct malloc_type kmemstats[MAX_KMSTATS], *kmsp;
 760         char *kmemnames[MAX_KMSTATS];
 761         char buf[1024];
 762         struct kmembuckets buckets[MINBUCKET + 16];
 763
 764         kread(X_KMEMBUCKETS, buckets, sizeof(buckets));
 765         kread(X_KMEMSTATISTICS, &kmsp, sizeof(kmsp));
 766         for (nkms = 0; nkms < MAX_KMSTATS && kmsp != NULL; nkms++) {
 767                 if (sizeof(kmemstats[0]) != kvm_read(kd, (u_long)kmsp,
 768                     &kmemstats[nkms], sizeof(kmemstats[0])))
 769                         err(1, "kvm_read(%p)", (void *)kmsp);
 770                 if (sizeof(buf) !=  kvm_read(kd,
 771                     (u_long)kmemstats[nkms].ks_shortdesc, buf, sizeof(buf)))
 772                         err(1, "kvm_read(%p)",
 773                             (void *)kmemstats[nkms].ks_shortdesc);
 774                 buf[sizeof(buf) - 1] = '\0';
 775                 kmemstats[nkms].ks_shortdesc = strdup(buf);
 776                 kmsp = kmemstats[nkms].ks_next;
 777         }
 778         if (kmsp != NULL)
 779                 warnx("truncated to the first %d memory types", nkms);
 780         (void)printf("Memory statistics by bucket size\n");
 781         (void)printf(
 782             "Size   In Use   Free   Requests  HighWater  Couldfree\n");
 783         for (i = MINBUCKET, kp = &buckets[i]; i < MINBUCKET + 16; i++, kp++) {
 784                 if (kp->kb_calls == 0)
 785                         continue;
 786                 size = 1 << i;
 787                 if(size < 1024)
 788                         (void)printf("%4d",size);
 789                 else
 790                         (void)printf("%3dK",size>>10);
 791                 (void)printf(" %8ld %6ld %10ld %7ld %10ld\n",
 792                         kp->kb_total - kp->kb_totalfree,
 793                         kp->kb_totalfree, kp->kb_calls,
 794                         kp->kb_highwat, kp->kb_couldfree);
 795                 totfree += size * kp->kb_totalfree;
 796         }
 797
 798         (void)printf("\nMemory usage type by bucket size\n");
 799         (void)printf("Size  Type(s)\n");
 800         kp = &buckets[MINBUCKET];
 801         for (j =  1 << MINBUCKET; j < 1 << (MINBUCKET + 16); j <<= 1, kp++) {
 802                 if (kp->kb_calls == 0)
 803                         continue;
 804                 first = 1;
 805                 len = 8;
 806                 for (i = 0, ks = &kmemstats[0]; i < nkms; i++, ks++) {
 807                         if (ks->ks_calls == 0)
 808                                 continue;
 809                         if ((ks->ks_size & j) == 0)
 810                                 continue;
 811                         name = ks->ks_shortdesc;
 812                         len += 2 + strlen(name);
 813                         if (first && j < 1024)
 814                                 printf("%4d  %s", j, name);
 815                         else if (first)
 816                                 printf("%3dK  %s", j>>10, name);
 817                         else
 818                                 printf(",");
 819                         if (len >= 79) {
 820                                 printf("\n\t ");
 821                                 len = 10 + strlen(name);
 822                         }
 823                         if (!first)
 824                                 printf(" %s", name);
 825                         first = 0;
 826                 }
 827                 printf("\n");
 828         }
 829
 830         (void)printf(
 831             "\nMemory statistics by type                          Type  Kern\n");
 832         (void)printf(
 833 "        Type  InUse MemUse HighUse  Limit Requests Limit Limit Size(s)\n");
 834         for (i = 0, ks = &kmemstats[0]; i < nkms; i++, ks++) {
 835                 if (ks->ks_calls == 0)
 836                         continue;
 837                 (void)printf("%13s%6ld%6ldK%7ldK%6ldK%9ld%5u%6u",
 838                     ks->ks_shortdesc,
 839                     ks->ks_inuse, (ks->ks_memuse + 1023) / 1024,
 840                     (ks->ks_maxused + 1023) / 1024,
 841                     (ks->ks_limit + 1023) / 1024, ks->ks_calls,
 842                     ks->ks_limblocks, ks->ks_mapblocks);
 843                 first = 1;
 844                 for (j =  1 << MINBUCKET; j < 1 << (MINBUCKET + 16); j <<= 1) {
 845                         if ((ks->ks_size & j) == 0)
 846                                 continue;
 847                         if (first)
 848                                 printf("  ");
 849                         else
 850                                 printf(",");
 851                         if(j<1024)
 852                                 printf("%d",j);
 853                         else
 854                                 printf("%dK",j>>10);
 855                         first = 0;
 856                 }
 857                 printf("\n");
 858                 totuse += ks->ks_memuse;
 859                 totreq += ks->ks_calls;
 860         }
 861         (void)printf("\nMemory Totals:  In Use    Free    Requests\n");
 862         (void)printf("              %7ldK %6ldK    %8ld\n",
 863              (totuse + 1023) / 1024, (totfree + 1023) / 1024, totreq);
 864 }
 865
 866 void
 867 dozmem()
 868 {
 869         vm_zone_t zonep;
 870         int nmax = 512;
 871         int zused_bytes = 0;
 872         int ztotal_bytes = 0;
 873
 874         printf(
 875             "\n"
 876             "%-16s%-8s%-8s%-8s\n",
 877             "ZONE",
 878             "used",
 879             "total",
 880             "mem-use"
 881         );
 882
 883         kread(X_ZLIST, &zonep, sizeof(zonep));
 884         while (zonep != NULL && nmax) {
 885                 struct vm_zone zone;
 886                 char buf[32];
 887                 int n;
 888
 889                 if (kvm_read(kd, (u_long)zonep, &zone, sizeof(zone)) != sizeof(zone))
 890                         break;
 891                 n = kvm_read(kd, (u_long)zone.zname, buf, sizeof(buf) - 1);
 892                 if (n < 0)
 893                     n = 0;
 894                 buf[n] = 0;
 895
 896                 printf(
 897                     "%-15.15s %-7d %-7d %4d/%dK\n",
 898                     buf,
 899                     zone.ztotal - zone.zfreecnt,
 900                     zone.ztotal,
 901                     (zone.ztotal - zone.zfreecnt) * zone.zsize / 1024,
 902                     zone.ztotal * zone.zsize / 1024
 903                 );
 904                 zused_bytes += (zone.ztotal - zone.zfreecnt) * zone.zsize;
 905                 ztotal_bytes += zone.ztotal * zone.zsize;
 906                 --nmax;
 907                 zonep = zone.znext;
 908         }
 909         printf(
 910             "------------------------------------------\n"
 911             "%-15.15s %-7s %-7s %4d/%dK\n\n",
 912             "TOTAL",
 913             "",
 914             "",
 915             zused_bytes / 1024,
 916             ztotal_bytes / 1024
 917         );
 918 }
 919
 920 /*
 921  * kread reads something from the kernel, given its nlist index.
 922  */
 923 void
 924 kread(nlx, addr, size)
 925         int nlx;
 926         void *addr;
 927         size_t size;
 928 {
 929         char *sym;
 930
 931         if (namelist[nlx].n_type == 0 || namelist[nlx].n_value == 0) {
 932                 sym = namelist[nlx].n_name;
 933                 if (*sym == '_')
 934                         ++sym;
 935                 errx(1, "symbol %s not defined", sym);
 936         }
 937         if (kvm_read(kd, namelist[nlx].n_value, addr, size) != size) {
 938                 sym = namelist[nlx].n_name;
 939                 if (*sym == '_')
 940                         ++sym;
 941                 errx(1, "%s: %s", sym, kvm_geterr(kd));
 942         }
 943 }
 944
 945 void
 946 usage()
 947 {
 948         (void)fprintf(stderr,
 949 "usage: vmstat [-imsz] [-c count] [-M core] [-N system] [-w wait] [disks]\n");
 950         exit(1);
 951 }