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. 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  * @(#) Copyright (c) 1980, 1986, 1991, 1993 The Regents of the University of California.  All rights reserved.
  30  * @(#)vmstat.c 8.1 (Berkeley) 6/6/93
  31  * $FreeBSD: src/usr.bin/vmstat/vmstat.c,v 1.38.2.4 2001/07/31 19:52:41 tmm Exp $
  32  */
  33
  34 #include <sys/user.h>
  35 #include <sys/param.h>
  36 #include <sys/time.h>
  37 #include <sys/uio.h>
  38 #include <sys/namei.h>
  39 #include <sys/malloc.h>
  40 #include <sys/signal.h>
  41 #include <sys/fcntl.h>
  42 #include <sys/ioctl.h>
  43 #include <sys/sysctl.h>
  44 #include <sys/vmmeter.h>
  45 #include <sys/interrupt.h>
  46
  47 #include <vm/vm_param.h>
  48
  49 #include <ctype.h>
  50 #include <err.h>
  51 #include <errno.h>
  52 #include <kinfo.h>
  53 #include <kvm.h>
  54 #include <limits.h>
  55 #include <nlist.h>
  56 #include <paths.h>
  57 #include <stdio.h>
  58 #include <stdlib.h>
  59 #include <string.h>
  60 #include <sysexits.h>
  61 #include <time.h>
  62 #include <unistd.h>
  63 #include <devstat.h>
  64
  65 static struct nlist namelist[] = {
  66 #define X_BOOTTIME      0
  67         { "_boottime",  0, 0, 0, 0 },
  68 #define X_NCHSTATS      1
  69         { "_nchstats",  0, 0, 0, 0 },
  70 #define X_KMEMSTATISTICS        2
  71         { "_kmemstatistics",    0, 0, 0, 0 },
  72 #define X_ZLIST         3
  73         { "_zlist",     0, 0, 0, 0 },
  74 #ifdef notyet
  75 #define X_DEFICIT       4
  76         { "_deficit",   0, 0, 0, 0 },
  77 #define X_FORKSTAT      5
  78         { "_forkstat",  0, 0, 0, 0 },
  79 #define X_REC           6
  80         { "_rectime",   0, 0, 0, 0 },
  81 #define X_PGIN          7
  82         { "_pgintime",  0, 0, 0, 0 },
  83 #define X_XSTATS        8
  84         { "_xstats",    0, 0, 0, 0 },
  85 #define X_END           9
  86 #else
  87 #define X_END           4
  88 #endif
  89         { "", 0, 0, 0, 0 },
  90 };
  91
  92 struct statinfo cur, last;
  93 int num_devices, maxshowdevs;
  94 long generation;
  95 struct device_selection *dev_select;
  96 int num_selected;
  97 struct devstat_match *matches;
  98 int num_matches = 0;
  99 int num_devices_specified, num_selections;
 100 long select_generation;
 101 char **specified_devices;
 102 devstat_select_mode select_mode;
 103
 104 struct  vmmeter vmm, ovmm;
 105 struct  vmstats vms, ovms;
 106
 107 int     winlines = 20;
 108 int     nflag = 0;
 109 int     verbose = 0;
 110
 111 kvm_t *kd;
 112
 113 struct kinfo_cputime cp_time, old_cp_time, diff_cp_time;
 114
 115 #define FORKSTAT        0x01
 116 #define INTRSTAT        0x02
 117 #define MEMSTAT         0x04
 118 #define SUMSTAT         0x08
 119 #define TIMESTAT        0x10
 120 #define VMSTAT          0x20
 121 #define ZMEMSTAT        0x40
 122
 123 static void cpustats(void);
 124 static void dointr(void);
 125 static void domem(void);
 126 static void dosum(void);
 127 static void dozmem(void);
 128 static void dovmstat(u_int, int);
 129 static void kread(int, void *, size_t);
 130 static void usage(void);
 131 static char **getdrivedata(char **);
 132 static long getuptime(void);
 133 static void needhdr(int);
 134 static long pct(long, long);
 135
 136 #ifdef notyet
 137 static void dotimes(void); /* Not implemented */
 138 static void doforkst(void);
 139 #endif
 140 static void printhdr(void);
 141 static void devstats(void);
 142
 143 int
 144 main(int argc, char **argv)
 145 {
 146         int c, todo;
 147         u_int interval;         /* milliseconds */
 148         int reps;
 149         char *memf, *nlistf;
 150         char errbuf[_POSIX2_LINE_MAX];
 151
 152         memf = nlistf = NULL;
 153         interval = reps = todo = 0;
 154         maxshowdevs = 2;
 155         while ((c = getopt(argc, argv, "c:fiM:mN:n:p:stvw:z")) != -1) {
 156                 switch (c) {
 157                 case 'c':
 158                         reps = atoi(optarg);
 159                         break;
 160                 case 'f':
 161 #ifdef notyet
 162                         todo |= FORKSTAT;
 163 #else
 164                         errx(EX_USAGE, "sorry, -f is not (re)implemented yet");
 165 #endif
 166                         break;
 167                 case 'i':
 168                         todo |= INTRSTAT;
 169                         break;
 170                 case 'M':
 171                         memf = optarg;
 172                         break;
 173                 case 'm':
 174                         todo |= MEMSTAT;
 175                         break;
 176                 case 'N':
 177                         nlistf = optarg;
 178                         break;
 179                 case 'n':
 180                         nflag = 1;
 181                         maxshowdevs = atoi(optarg);
 182                         if (maxshowdevs < 0)
 183                                 errx(1, "number of devices %d is < 0",
 184                                      maxshowdevs);
 185                         break;
 186                 case 'p':
 187                         if (buildmatch(optarg, &matches, &num_matches) != 0)
 188                                 errx(1, "%s", devstat_errbuf);
 189                         break;
 190                 case 's':
 191                         todo |= SUMSTAT;
 192                         break;
 193                 case 't':
 194 #ifdef notyet
 195                         todo |= TIMESTAT;
 196 #else
 197                         errx(EX_USAGE, "sorry, -t is not (re)implemented yet");
 198 #endif
 199                         break;
 200                 case 'v':
 201                         ++verbose;
 202                         break;
 203                 case 'w':
 204                         interval = (u_int)(strtod(optarg, NULL) * 1000.0);
 205                         break;
 206                 case 'z':
 207                         todo |= ZMEMSTAT;
 208                         break;
 209                 default:
 210                         usage();
 211                 }
 212         }
 213         argc -= optind;
 214         argv += optind;
 215
 216         if (todo == 0)
 217                 todo = VMSTAT;
 218
 219         /*
 220          * Discard setgid privileges if not the running kernel so that bad
 221          * guys can't print interesting stuff from kernel memory.
 222          */
 223         if (nlistf != NULL || memf != NULL)
 224                 setgid(getgid());
 225
 226         kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf);
 227         if (kd == NULL)
 228                 errx(1, "kvm_openfiles: %s", errbuf);
 229
 230         if ((c = kvm_nlist(kd, namelist)) != 0) {
 231                 if (c > 0) {
 232                         warnx("undefined symbols:");
 233                         for (c = 0; c < (int)__arysize(namelist); c++)
 234                                 if (namelist[c].n_type == 0)
 235                                         fprintf(stderr, " %s",
 236                                             namelist[c].n_name);
 237                         fputc('\n', stderr);
 238                 } else
 239                         warnx("kvm_nlist: %s", kvm_geterr(kd));
 240                 exit(1);
 241         }
 242
 243         if (todo & VMSTAT) {
 244                 struct winsize winsize;
 245
 246                 /*
 247                  * Make sure that the userland devstat version matches the
 248                  * kernel devstat version.  If not, exit and print a
 249                  * message informing the user of his mistake.
 250                  */
 251                 if (checkversion() < 0)
 252                         errx(1, "%s", devstat_errbuf);
 253
 254
 255                 argv = getdrivedata(argv);
 256                 winsize.ws_row = 0;
 257                 ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&winsize);
 258                 if (winsize.ws_row > 0)
 259                         winlines = winsize.ws_row;
 260
 261         }
 262
 263 #define BACKWARD_COMPATIBILITY
 264 #ifdef  BACKWARD_COMPATIBILITY
 265         if (*argv) {
 266                 interval = (u_int)(strtod(*argv, NULL) * 1000.0);
 267                 if (*++argv)
 268                         reps = atoi(*argv);
 269         }
 270 #endif
 271
 272         if (interval) {
 273                 if (!reps)
 274                         reps = -1;
 275         } else if (reps) {
 276                 interval = 1000;
 277         }
 278
 279 #ifdef notyet
 280         if (todo & FORKSTAT)
 281                 doforkst();
 282 #endif
 283         if (todo & MEMSTAT)
 284                 domem();
 285         if (todo & ZMEMSTAT)
 286                 dozmem();
 287         if (todo & SUMSTAT)
 288                 dosum();
 289 #ifdef notyet
 290         if (todo & TIMESTAT)
 291                 dotimes();
 292 #endif
 293         if (todo & INTRSTAT)
 294                 dointr();
 295         if (todo & VMSTAT)
 296                 dovmstat(interval, reps);
 297         exit(0);
 298 }
 299
 300 static char **
 301 getdrivedata(char **argv)
 302 {
 303         if ((num_devices = getnumdevs()) < 0)
 304                 errx(1, "%s", devstat_errbuf);
 305
 306         cur.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
 307         last.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
 308         bzero(cur.dinfo, sizeof(struct devinfo));
 309         bzero(last.dinfo, sizeof(struct devinfo));
 310
 311         if (getdevs(&cur) == -1)
 312                 errx(1, "%s", devstat_errbuf);
 313
 314         num_devices = cur.dinfo->numdevs;
 315         generation = cur.dinfo->generation;
 316
 317         specified_devices = (char **)malloc(sizeof(char *));
 318         for (num_devices_specified = 0; *argv; ++argv) {
 319                 if (isdigit(**argv))
 320                         break;
 321                 num_devices_specified++;
 322                 specified_devices = (char **)realloc(specified_devices,
 323                                                      sizeof(char *) *
 324                                                      num_devices_specified);
 325                 specified_devices[num_devices_specified - 1] = *argv;
 326         }
 327         dev_select = NULL;
 328
 329         if (nflag == 0 && maxshowdevs < num_devices_specified)
 330                         maxshowdevs = num_devices_specified;
 331
 332         /*
 333          * People are generally only interested in disk statistics when
 334          * they're running vmstat.  So, that's what we're going to give
 335          * them if they don't specify anything by default.  We'll also give
 336          * them any other random devices in the system so that we get to
 337          * maxshowdevs devices, if that many devices exist.  If the user
 338          * specifies devices on the command line, either through a pattern
 339          * match or by naming them explicitly, we will give the user only
 340          * those devices.
 341          */
 342         if ((num_devices_specified == 0) && (num_matches == 0)) {
 343                 if (buildmatch("da", &matches, &num_matches) != 0)
 344                         errx(1, "%s", devstat_errbuf);
 345
 346                 select_mode = DS_SELECT_ADD;
 347         } else
 348                 select_mode = DS_SELECT_ONLY;
 349
 350         /*
 351          * At this point, selectdevs will almost surely indicate that the
 352          * device list has changed, so we don't look for return values of 0
 353          * or 1.  If we get back -1, though, there is an error.
 354          */
 355         if (selectdevs(&dev_select, &num_selected, &num_selections,
 356                        &select_generation, generation, cur.dinfo->devices,
 357                        num_devices, matches, num_matches, specified_devices,
 358                        num_devices_specified, select_mode,
 359                        maxshowdevs, 0) == -1)
 360                 errx(1, "%s", devstat_errbuf);
 361
 362         return(argv);
 363 }
 364
 365 static long
 366 getuptime(void)
 367 {
 368         static time_t now, boottime;
 369         time_t uptime;
 370
 371         if (boottime == 0)
 372                 kread(X_BOOTTIME, &boottime, sizeof(boottime));
 373         time(&now);
 374         uptime = now - boottime;
 375         if (uptime <= 0 || uptime > 60*60*24*365*10)
 376                 errx(1, "time makes no sense; namelist must be wrong");
 377         return(uptime);
 378 }
 379
 380 int     hdrcnt;
 381
 382 static void
 383 dovmstat(u_int interval, int reps)
 384 {
 385         struct vmtotal total;
 386         struct devinfo *tmp_dinfo;
 387         size_t vmm_size = sizeof(vmm);
 388         size_t vms_size = sizeof(vms);
 389         size_t vmt_size = sizeof(total);
 390         int initial = 1;
 391
 392         signal(SIGCONT, needhdr);
 393
 394         for (hdrcnt = 1;;) {
 395                 if (!--hdrcnt)
 396                         printhdr();
 397                 if (kinfo_get_sched_cputime(&cp_time))
 398                         err(1, "kinfo_get_sched_cputime");
 399
 400                 tmp_dinfo = last.dinfo;
 401                 last.dinfo = cur.dinfo;
 402                 cur.dinfo = tmp_dinfo;
 403                 last.busy_time = cur.busy_time;
 404
 405                 /*
 406                  * Here what we want to do is refresh our device stats.
 407                  * getdevs() returns 1 when the device list has changed.
 408                  * If the device list has changed, we want to go through
 409                  * the selection process again, in case a device that we
 410                  * were previously displaying has gone away.
 411                  */
 412                 switch (getdevs(&cur)) {
 413                 case -1:
 414                         errx(1, "%s", devstat_errbuf);
 415                         break;
 416                 case 1: {
 417                         int retval;
 418
 419                         num_devices = cur.dinfo->numdevs;
 420                         generation = cur.dinfo->generation;
 421
 422                         retval = selectdevs(&dev_select, &num_selected,
 423                                             &num_selections, &select_generation,
 424                                             generation, cur.dinfo->devices,
 425                                             num_devices, matches, num_matches,
 426                                             specified_devices,
 427                                             num_devices_specified, select_mode,
 428                                             maxshowdevs, 0);
 429                         switch (retval) {
 430                         case -1:
 431                                 errx(1, "%s", devstat_errbuf);
 432                                 break;
 433                         case 1:
 434                                 printhdr();
 435                                 break;
 436                         default:
 437                                 break;
 438                         }
 439                 }
 440                 default:
 441                         break;
 442                 }
 443
 444                 if (sysctlbyname("vm.vmstats", &vms, &vms_size, NULL, 0)) {
 445                         perror("sysctlbyname: vm.vmstats");
 446                         exit(1);
 447                 }
 448                 if (sysctlbyname("vm.vmmeter", &vmm, &vmm_size, NULL, 0)) {
 449                         perror("sysctlbyname: vm.vmmeter");
 450                         exit(1);
 451                 }
 452                 if (sysctlbyname("vm.vmtotal", &total, &vmt_size, NULL, 0)) {
 453                         perror("sysctlbyname: vm.vmtotal");
 454                         exit(1);
 455                 }
 456                 printf("%2ld %1ld %1ld",
 457                     total.t_rq - 1, total.t_dw + total.t_pw, total.t_sw);
 458
 459 #define vmstat_pgtok(a) \
 460         (intmax_t)(((intmax_t)(a) * vms.v_page_size) >> 10)
 461 #define rate(x)         \
 462         (intmax_t)(initial ? (x) : ((intmax_t)(x) * 1000 + interval / 2) \
 463                                    / interval)
 464
 465                 printf(" %7jd %6jd ",
 466                        vmstat_pgtok(total.t_avm),
 467                        vmstat_pgtok(total.t_free));
 468                 printf("%4ju ",
 469                        rate(vmm.v_vm_faults - ovmm.v_vm_faults));
 470                 printf("%3ju ",
 471                        rate(vmm.v_reactivated - ovmm.v_reactivated));
 472                 printf("%3ju ",
 473                        rate(vmm.v_swapin + vmm.v_vnodein -
 474                             (ovmm.v_swapin + ovmm.v_vnodein)));
 475                 printf("%3ju ",
 476                        rate(vmm.v_swapout + vmm.v_vnodeout -
 477                             (ovmm.v_swapout + ovmm.v_vnodeout)));
 478                 printf("%3ju ",
 479                        rate(vmm.v_tfree - ovmm.v_tfree));
 480                 printf("%3ju ",
 481                        rate(vmm.v_pdpages - ovmm.v_pdpages));
 482                 devstats();
 483                 printf("%4ju %4ju %3ju ",
 484                        rate(vmm.v_intr - ovmm.v_intr),
 485                        rate(vmm.v_syscall - ovmm.v_syscall),
 486                        rate(vmm.v_swtch - ovmm.v_swtch));
 487                 cpustats();
 488                 printf("\n");
 489                 fflush(stdout);
 490                 if (reps >= 0 && --reps <= 0)
 491                         break;
 492                 ovmm = vmm;
 493                 usleep(interval * 1000);
 494                 initial = 0;
 495         }
 496 }
 497
 498 static void
 499 printhdr(void)
 500 {
 501         int i, num_shown;
 502
 503         num_shown = (num_selected < maxshowdevs) ? num_selected : maxshowdevs;
 504         printf(" procs      memory      page%*s", 19, "");
 505         if (num_shown > 1)
 506                 printf(" disks %*s", num_shown * 4 - 7, "");
 507         else if (num_shown == 1)
 508                 printf("disk");
 509         printf("   faults      cpu\n");
 510         printf(" r b w     avm    fre  flt  re  pi  po  fr  sr ");
 511         for (i = 0; i < num_devices; i++)
 512                 if ((dev_select[i].selected)
 513                  && (dev_select[i].selected <= maxshowdevs))
 514                         printf("%c%c%d ", dev_select[i].device_name[0],
 515                                      dev_select[i].device_name[1],
 516                                      dev_select[i].unit_number);
 517         printf("  in   sy  cs us sy id\n");
 518         hdrcnt = winlines - 2;
 519 }
 520
 521 /*
 522  * Force a header to be prepended to the next output.
 523  */
 524 static void
 525 needhdr(__unused int signo)
 526 {
 527
 528         hdrcnt = 1;
 529 }
 530
 531 static long
 532 pct(long top, long bot)
 533 {
 534         long ans;
 535
 536         if (bot == 0)
 537                 return(0);
 538         ans = (quad_t)top * 100 / bot;
 539         return (ans);
 540 }
 541
 542 #define PCT(top, bot) pct((long)(top), (long)(bot))
 543
 544 static void
 545 dosum(void)
 546 {
 547         struct nchstats *nch_tmp, nchstats;
 548         size_t vms_size = sizeof(vms);
 549         size_t vmm_size = sizeof(vmm);
 550         int cpucnt;
 551         u_long nchtotal;
 552         u_long nchpathtotal;
 553         size_t nch_size = sizeof(struct nchstats) * SMP_MAXCPU;
 554
 555         if (sysctlbyname("vm.vmstats", &vms, &vms_size, NULL, 0)) {
 556                 perror("sysctlbyname: vm.vmstats");
 557                 exit(1);
 558         }
 559         if (sysctlbyname("vm.vmmeter", &vmm, &vmm_size, NULL, 0)) {
 560                 perror("sysctlbyname: vm.vmstats");
 561                 exit(1);
 562         }
 563         printf("%9u cpu context switches\n", vmm.v_swtch);
 564         printf("%9u device interrupts\n", vmm.v_intr);
 565         printf("%9u software interrupts\n", vmm.v_soft);
 566         printf("%9u traps\n", vmm.v_trap);
 567         printf("%9u system calls\n", vmm.v_syscall);
 568         printf("%9u kernel threads created\n", vmm.v_kthreads);
 569         printf("%9u  fork() calls\n", vmm.v_forks);
 570         printf("%9u vfork() calls\n", vmm.v_vforks);
 571         printf("%9u rfork() calls\n", vmm.v_rforks);
 572         printf("%9u exec() calls\n", vmm.v_exec);
 573         printf("%9u swap pager pageins\n", vmm.v_swapin);
 574         printf("%9u swap pager pages paged in\n", vmm.v_swappgsin);
 575         printf("%9u swap pager pageouts\n", vmm.v_swapout);
 576         printf("%9u swap pager pages paged out\n", vmm.v_swappgsout);
 577         printf("%9u vnode pager pageins\n", vmm.v_vnodein);
 578         printf("%9u vnode pager pages paged in\n", vmm.v_vnodepgsin);
 579         printf("%9u vnode pager pageouts\n", vmm.v_vnodeout);
 580         printf("%9u vnode pager pages paged out\n", vmm.v_vnodepgsout);
 581         printf("%9u page daemon wakeups\n", vmm.v_pdwakeups);
 582         printf("%9u pages examined by the page daemon\n", vmm.v_pdpages);
 583         printf("%9u pages reactivated\n", vmm.v_reactivated);
 584         printf("%9u copy-on-write faults\n", vmm.v_cow_faults);
 585         printf("%9u copy-on-write optimized faults\n", vmm.v_cow_optim);
 586         printf("%9u zero fill pages zeroed\n", vmm.v_zfod);
 587         printf("%9u zero fill pages prezeroed\n", vmm.v_ozfod);
 588         printf("%9u intransit blocking page faults\n", vmm.v_intrans);
 589         printf("%9u total VM faults taken\n", vmm.v_vm_faults);
 590         printf("%9u pages affected by kernel thread creation\n", vmm.v_kthreadpages);
 591         printf("%9u pages affected by  fork()\n", vmm.v_forkpages);
 592         printf("%9u pages affected by vfork()\n", vmm.v_vforkpages);
 593         printf("%9u pages affected by rfork()\n", vmm.v_rforkpages);
 594         printf("%9u pages freed\n", vmm.v_tfree);
 595         printf("%9u pages freed by daemon\n", vmm.v_dfree);
 596         printf("%9u pages freed by exiting processes\n", vmm.v_pfree);
 597         printf("%9u pages active\n", vms.v_active_count);
 598         printf("%9u pages inactive\n", vms.v_inactive_count);
 599         printf("%9u pages in VM cache\n", vms.v_cache_count);
 600         printf("%9u pages wired down\n", vms.v_wire_count);
 601         printf("%9u pages free\n", vms.v_free_count);
 602         printf("%9u bytes per page\n", vms.v_page_size);
 603         printf("%9u global smp invltlbs\n", vmm.v_smpinvltlb);
 604
 605         if ((nch_tmp = malloc(nch_size)) == NULL) {
 606                 perror("malloc");
 607                 exit(1);
 608         } else {
 609                 if (sysctlbyname("vfs.cache.nchstats", nch_tmp, &nch_size, NULL, 0)) {
 610                         perror("sysctlbyname vfs.cache.nchstats");
 611                         free(nch_tmp);
 612                         exit(1);
 613                 } else {
 614                         if ((nch_tmp = realloc(nch_tmp, nch_size)) == NULL) {
 615                                 perror("realloc");
 616                                 exit(1);
 617                         }
 618                 }
 619         }
 620
 621         cpucnt = nch_size / sizeof(struct nchstats);
 622         kvm_nch_cpuagg(nch_tmp, &nchstats, cpucnt);
 623
 624         nchtotal = nchstats.ncs_goodhits + nchstats.ncs_neghits +
 625             nchstats.ncs_badhits + nchstats.ncs_falsehits +
 626             nchstats.ncs_miss;
 627         nchpathtotal = nchstats.ncs_longhits + nchstats.ncs_longmiss;
 628         printf("%9ld total path lookups\n", nchpathtotal);
 629         printf("%9ld total component lookups\n", nchtotal);
 630         printf(
 631             "%9s cache hits (%ld%% pos + %ld%% neg)\n",
 632             "", PCT(nchstats.ncs_goodhits, nchtotal),
 633             PCT(nchstats.ncs_neghits, nchtotal));
 634         printf("%9s deletions %ld%%, falsehits %ld%%\n", "",
 635             PCT(nchstats.ncs_badhits, nchtotal),
 636             PCT(nchstats.ncs_falsehits, nchtotal));
 637         free(nch_tmp);
 638 }
 639
 640 #ifdef notyet
 641 void
 642 doforkst(void)
 643 {
 644         struct forkstat fks;
 645
 646         kread(X_FORKSTAT, &fks, sizeof(struct forkstat));
 647         printf("%d forks, %d pages, average %.2f\n",
 648             fks.cntfork, fks.sizfork, (double)fks.sizfork / fks.cntfork);
 649         printf("%d vforks, %d pages, average %.2f\n",
 650             fks.cntvfork, fks.sizvfork, (double)fks.sizvfork / fks.cntvfork);
 651 }
 652 #endif
 653
 654 static void
 655 devstats(void)
 656 {
 657         int dn;
 658         long double transfers_per_second;
 659         long double busy_seconds;
 660
 661         diff_cp_time.cp_user = cp_time.cp_user - old_cp_time.cp_user;
 662         diff_cp_time.cp_nice = cp_time.cp_nice - old_cp_time.cp_nice;
 663         diff_cp_time.cp_sys = cp_time.cp_sys - old_cp_time.cp_sys;
 664         diff_cp_time.cp_intr = cp_time.cp_intr - old_cp_time.cp_intr;
 665         diff_cp_time.cp_idle = cp_time.cp_idle - old_cp_time.cp_idle;
 666         old_cp_time = cp_time;
 667
 668         busy_seconds = compute_etime(cur.busy_time, last.busy_time);
 669
 670         for (dn = 0; dn < num_devices; dn++) {
 671                 int di;
 672
 673                 if ((dev_select[dn].selected == 0)
 674                  || (dev_select[dn].selected > maxshowdevs))
 675                         continue;
 676
 677                 di = dev_select[dn].position;
 678
 679                 if (compute_stats(&cur.dinfo->devices[di],
 680                                   &last.dinfo->devices[di], busy_seconds,
 681                                   NULL, NULL, NULL,
 682                                   NULL, &transfers_per_second, NULL,
 683                                   NULL, NULL) != 0)
 684                         errx(1, "%s", devstat_errbuf);
 685
 686                 printf("%3.0Lf ", transfers_per_second);
 687         }
 688 }
 689
 690 static void
 691 cpustats(void)
 692 {
 693         uint64_t total;
 694         double totusage;
 695
 696         total = diff_cp_time.cp_user + diff_cp_time.cp_nice +
 697             diff_cp_time.cp_sys + diff_cp_time.cp_intr + diff_cp_time.cp_idle;
 698
 699         if (total)
 700                 totusage = 100.0 / total;
 701         else
 702                 totusage = 0;
 703         printf("%2.0f ",
 704                (diff_cp_time.cp_user + diff_cp_time.cp_nice) * totusage);
 705         printf("%2.0f ",
 706                (diff_cp_time.cp_sys + diff_cp_time.cp_intr) * totusage);
 707         printf("%2.0f",
 708                diff_cp_time.cp_idle * totusage);
 709 }
 710
 711 static void
 712 dointr(void)
 713 {
 714         u_long *intrcnt, uptime;
 715         u_int64_t inttotal;
 716         size_t nintr, inamlen, i, size;
 717         int nwidth;
 718         char *intrstr;
 719         char **intrname;
 720
 721         uptime = getuptime();
 722         if (sysctlbyname("hw.intrnames", NULL, &inamlen, NULL, 0) != 0)
 723                 errx(1, "sysctlbyname");
 724         intrstr = malloc(inamlen);
 725         if (intrstr == NULL)
 726                 err(1, "malloc");
 727         sysctlbyname("hw.intrnames", intrstr, &inamlen, NULL, 0);
 728         for (nintr = 0, i = 0; i < inamlen; ++i) {
 729                 if (intrstr[i] == 0)
 730                         nintr++;
 731         }
 732         intrname = malloc(nintr * sizeof(char *));
 733         for (i = 0; i < nintr; ++i) {
 734                 intrname[i] = intrstr;
 735                 intrstr += strlen(intrstr) + 1;
 736         }
 737
 738         size = nintr * sizeof(*intrcnt);
 739         intrcnt = calloc(nintr, sizeof(*intrcnt));
 740         if (intrcnt == NULL)
 741                 err(1, "malloc");
 742         sysctlbyname("hw.intrcnt", intrcnt, &size, NULL, 0);
 743
 744         nwidth = 21;
 745         for (i = 0; i < nintr; ++i) {
 746                 if (nwidth < (int)strlen(intrname[i]))
 747                         nwidth = (int)strlen(intrname[i]);
 748         }
 749         if (verbose) nwidth += 12;
 750
 751         printf("%-*.*s %11s %10s\n",
 752                 nwidth, nwidth, "interrupt", "total", "rate");
 753         inttotal = 0;
 754         for (i = 0; i < nintr; ++i) {
 755                 int named;
 756                 char *infop, irqinfo[72];
 757
 758                 if ((named = strncmp(intrname[i], "irq", 3)) != 0 ||
 759                     intrcnt[i] > 0) {
 760                         infop = intrname[i];
 761                         if (verbose) {
 762                                 ssize_t irq, cpu;
 763
 764                                 irq = i % MAX_INTS;
 765                                 cpu = i / MAX_INTS;
 766                                 if (named) {
 767                                         snprintf(irqinfo, sizeof(irqinfo),
 768                                                  "irq%-3zd %3zd: %s",
 769                                                  irq, cpu, intrname[i]);
 770                                 } else {
 771                                         snprintf(irqinfo, sizeof(irqinfo),
 772                                                  "irq%-3zd %3zd: ", irq, cpu);
 773                                 }
 774                                 infop = irqinfo;
 775                         }
 776                         printf("%-*.*s %11lu %10lu\n",
 777                                 nwidth, nwidth, infop,
 778                                 intrcnt[i], intrcnt[i] / uptime);
 779                 }
 780                 inttotal += intrcnt[i];
 781         }
 782         printf("%-*.*s %11llu %10llu\n",
 783                 nwidth, nwidth, "Total",
 784                 (long long)inttotal, (long long)(inttotal / uptime));
 785 }
 786
 787 #define MAX_KMSTATS     1024
 788
 789 static long
 790 cpuagg(size_t *ary)
 791 {
 792     int i;
 793     long ttl;
 794
 795     for (i = ttl = 0; i < SMP_MAXCPU; ++i)
 796         ttl += ary[i];
 797     return(ttl);
 798 }
 799
 800 static void
 801 domem(void)
 802 {
 803         struct malloc_type *ks;
 804         int i, j;
 805         int first, nkms;
 806         long totuse = 0, totfree = 0, totreq = 0;
 807         struct malloc_type kmemstats[MAX_KMSTATS], *kmsp;
 808         char buf[1024];
 809
 810         kread(X_KMEMSTATISTICS, &kmsp, sizeof(kmsp));
 811         for (nkms = 0; nkms < MAX_KMSTATS && kmsp != NULL; nkms++) {
 812                 if (sizeof(kmemstats[0]) != kvm_read(kd, (u_long)kmsp,
 813                     &kmemstats[nkms], sizeof(kmemstats[0])))
 814                         err(1, "kvm_read(%p)", (void *)kmsp);
 815                 if (sizeof(buf) !=  kvm_read(kd,
 816                     (u_long)kmemstats[nkms].ks_shortdesc, buf, sizeof(buf)))
 817                         err(1, "kvm_read(%p)",
 818                             kmemstats[nkms].ks_shortdesc);
 819                 buf[sizeof(buf) - 1] = '\0';
 820                 kmemstats[nkms].ks_shortdesc = strdup(buf);
 821                 kmsp = kmemstats[nkms].ks_next;
 822         }
 823         if (kmsp != NULL)
 824                 warnx("truncated to the first %d memory types", nkms);
 825
 826         printf(
 827             "\nMemory statistics by type                          Type  Kern\n");
 828         printf(
 829 "              Type   InUse  MemUse HighUse       Limit  Requests  Limit Limit\n");
 830         for (i = 0, ks = &kmemstats[0]; i < nkms; i++, ks++) {
 831                 if (ks->ks_calls == 0)
 832                         continue;
 833                 printf("%19s%7ld%7ldK%7ldK%11zuK%10jd%5u%6u",
 834                     ks->ks_shortdesc,
 835                     cpuagg(ks->ks_inuse), (cpuagg(ks->ks_memuse) + 1023) / 1024,
 836                     (ks->ks_maxused + 1023) / 1024,
 837                     (ks->ks_limit + 1023) / 1024, (intmax_t)ks->ks_calls,
 838                     ks->ks_limblocks, ks->ks_mapblocks);
 839                 first = 1;
 840                 for (j =  1 << MINBUCKET; j < 1 << (MINBUCKET + 16); j <<= 1) {
 841                         if ((ks->ks_size & j) == 0)
 842                                 continue;
 843                         if (first)
 844                                 printf("  ");
 845                         else
 846                                 printf(",");
 847                         if(j<1024)
 848                                 printf("%d",j);
 849                         else
 850                                 printf("%dK",j>>10);
 851                         first = 0;
 852                 }
 853                 printf("\n");
 854                 totuse += cpuagg(ks->ks_memuse);
 855                 totreq += ks->ks_calls;
 856         }
 857         printf("\nMemory Totals:  In Use    Free    Requests\n");
 858         printf("              %7ldK %6ldK    %8ld\n",
 859              (totuse + 1023) / 1024, (totfree + 1023) / 1024, totreq);
 860 }
 861
 862 static void
 863 dozmem(void)
 864 {
 865         char *buf;
 866         size_t bufsize;
 867
 868         buf = NULL;
 869         bufsize = 1024;
 870         for (;;) {
 871                 if ((buf = realloc(buf, bufsize)) == NULL)
 872                         err(1, "realloc()");
 873                 if (sysctlbyname("vm.zone", buf, &bufsize, NULL, 0) == 0)
 874                         break;
 875                 if (errno != ENOMEM)
 876                         err(1, "sysctl()");
 877                 bufsize *= 2;
 878         }
 879         buf[bufsize] = '\0'; /* play it safe */
 880         printf("%s\n\n", buf);
 881         free(buf);
 882 }
 883
 884 /*
 885  * kread reads something from the kernel, given its nlist index.
 886  */
 887 static void
 888 kread(int nlx, void *addr, size_t size)
 889 {
 890         const char *sym;
 891
 892         if (namelist[nlx].n_type == 0 || namelist[nlx].n_value == 0) {
 893                 sym = namelist[nlx].n_name;
 894                 if (*sym == '_')
 895                         ++sym;
 896                 errx(1, "symbol %s not defined", sym);
 897         }
 898         if (kvm_read(kd, namelist[nlx].n_value, addr, size) != (ssize_t)size) {
 899                 sym = namelist[nlx].n_name;
 900                 if (*sym == '_')
 901                         ++sym;
 902                 errx(1, "%s: %s", sym, kvm_geterr(kd));
 903         }
 904 }
 905
 906 static void
 907 usage(void)
 908 {
 909         fprintf(stderr, "%s%s",
 910                 "usage: vmstat [-imsvz] [-c count] [-M core] [-N system] [-w wait]\n",
 911                 "              [-n devs] [disks]\n");
 912         exit(1);
 913 }