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  * @(#) Copyright (c) 1980, 1986, 1991, 1993 The Regents of the University of California.  All rights reserved.
  34  * @(#)vmstat.c 8.1 (Berkeley) 6/6/93
  35  * $FreeBSD: src/usr.bin/vmstat/vmstat.c,v 1.38.2.4 2001/07/31 19:52:41 tmm Exp $
  36  * $DragonFly: src/usr.bin/vmstat/vmstat.c,v 1.14 2004/12/22 11:01:49 joerg Exp $
  37  */
  38
  39 #define _KERNEL_STRUCTURES
  40
  41 #include <sys/param.h>
  42 #include <sys/time.h>
  43 #include <sys/user.h>
  44 #include <sys/uio.h>
  45 #include <sys/namei.h>
  46 #include <sys/malloc.h>
  47 #include <sys/signal.h>
  48 #include <sys/fcntl.h>
  49 #include <sys/ioctl.h>
  50 #include <sys/sysctl.h>
  51 #include <sys/vmmeter.h>
  52
  53 #include <vm/vm_param.h>
  54
  55 #include <ctype.h>
  56 #include <err.h>
  57 #include <errno.h>
  58 #include <kinfo.h>
  59 #include <kvm.h>
  60 #include <limits.h>
  61 #include <nlist.h>
  62 #include <paths.h>
  63 #include <stdio.h>
  64 #include <stdlib.h>
  65 #include <string.h>
  66 #include <sysexits.h>
  67 #include <time.h>
  68 #include <unistd.h>
  69 #include <devstat.h>
  70
  71 static struct nlist namelist[] = {
  72 #define X_BOOTTIME      0
  73         { "_boottime" },
  74 #define X_NCHSTATS      1
  75         { "_nchstats" },
  76 #define X_INTRNAMES     2
  77         { "_intrnames" },
  78 #define X_EINTRNAMES    3
  79         { "_eintrnames" },
  80 #define X_INTRCNT       4
  81         { "_intrcnt" },
  82 #define X_EINTRCNT      5
  83         { "_eintrcnt" },
  84 #define X_KMEMSTATISTICS        6
  85         { "_kmemstatistics" },
  86 #define X_ZLIST         7
  87         { "_zlist" },
  88 #ifdef notyet
  89 #define X_DEFICIT       8
  90         { "_deficit" },
  91 #define X_FORKSTAT      9
  92         { "_forkstat" },
  93 #define X_REC           10
  94         { "_rectime" },
  95 #define X_PGIN          11
  96         { "_pgintime" },
  97 #define X_XSTATS        12
  98         { "_xstats" },
  99 #define X_END           13
 100 #else
 101 #define X_END           8
 102 #endif
 103         { "" },
 104 };
 105
 106 struct statinfo cur, last;
 107 int num_devices, maxshowdevs;
 108 long generation;
 109 struct device_selection *dev_select;
 110 int num_selected;
 111 struct devstat_match *matches;
 112 int num_matches = 0;
 113 int num_devices_specified, num_selections;
 114 long select_generation;
 115 char **specified_devices;
 116 devstat_select_mode select_mode;
 117
 118 struct  vmmeter vmm, ovmm;
 119 struct  vmstats vms, ovms;
 120
 121 int     winlines = 20;
 122 int     nflag = 0;
 123
 124 kvm_t *kd;
 125
 126 struct kinfo_cputime cp_time, old_cp_time, diff_cp_time;
 127
 128 #define FORKSTAT        0x01
 129 #define INTRSTAT        0x02
 130 #define MEMSTAT         0x04
 131 #define SUMSTAT         0x08
 132 #define TIMESTAT        0x10
 133 #define VMSTAT          0x20
 134 #define ZMEMSTAT        0x40
 135
 136 void    cpustats(), dointr(), domem(), dosum(), dozmem();
 137 void    dovmstat(), kread(), usage();
 138 #ifdef notyet
 139 void    dotimes(), doforkst();
 140 #endif
 141 void printhdr(void);
 142 static void devstats();
 143
 144 int
 145 main(int argc, char **argv)
 146 {
 147         int c, todo;
 148         u_int interval;
 149         int reps;
 150         char *memf, *nlistf;
 151         char errbuf[_POSIX2_LINE_MAX];
 152
 153         memf = nlistf = NULL;
 154         interval = reps = todo = 0;
 155         maxshowdevs = 2;
 156         while ((c = getopt(argc, argv, "c:fiM:mN:n:p:stw:z")) != -1) {
 157                 switch (c) {
 158                 case 'c':
 159                         reps = atoi(optarg);
 160                         break;
 161                 case 'f':
 162 #ifdef notyet
 163                         todo |= FORKSTAT;
 164 #else
 165                         errx(EX_USAGE, "sorry, -f is not (re)implemented yet");
 166 #endif
 167                         break;
 168                 case 'i':
 169                         todo |= INTRSTAT;
 170                         break;
 171                 case 'M':
 172                         memf = optarg;
 173                         break;
 174                 case 'm':
 175                         todo |= MEMSTAT;
 176                         break;
 177                 case 'N':
 178                         nlistf = optarg;
 179                         break;
 180                 case 'n':
 181                         nflag = 1;
 182                         maxshowdevs = atoi(optarg);
 183                         if (maxshowdevs < 0)
 184                                 errx(1, "number of devices %d is < 0",
 185                                      maxshowdevs);
 186                         break;
 187                 case 'p':
 188                         if (buildmatch(optarg, &matches, &num_matches) != 0)
 189                                 errx(1, "%s", devstat_errbuf);
 190                         break;
 191                 case 's':
 192                         todo |= SUMSTAT;
 193                         break;
 194                 case 't':
 195 #ifdef notyet
 196                         todo |= TIMESTAT;
 197 #else
 198                         errx(EX_USAGE, "sorry, -t is not (re)implemented yet");
 199 #endif
 200                         break;
 201                 case 'w':
 202                         interval = atoi(optarg);
 203                         break;
 204                 case 'z':
 205                         todo |= ZMEMSTAT;
 206                         break;
 207                 case '?':
 208                 default:
 209                         usage();
 210                 }
 211         }
 212         argc -= optind;
 213         argv += optind;
 214
 215         if (todo == 0)
 216                 todo = VMSTAT;
 217
 218         /*
 219          * Discard setgid privileges if not the running kernel so that bad
 220          * guys can't print interesting stuff from kernel memory.
 221          */
 222         if (nlistf != NULL || memf != NULL)
 223                 setgid(getgid());
 224
 225         kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf);
 226         if (kd == 0)
 227                 errx(1, "kvm_openfiles: %s", errbuf);
 228
 229         if ((c = kvm_nlist(kd, namelist)) != 0) {
 230                 if (c > 0) {
 231                         warnx("undefined symbols:");
 232                         for (c = 0;
 233                             c < sizeof(namelist)/sizeof(namelist[0]); 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                 char **getdrivedata();
 245                 struct winsize winsize;
 246
 247                 /*
 248                  * Make sure that the userland devstat version matches the
 249                  * kernel devstat version.  If not, exit and print a
 250                  * message informing the user of his mistake.
 251                  */
 252                 if (checkversion() < 0)
 253                         errx(1, "%s", devstat_errbuf);
 254
 255
 256                 argv = getdrivedata(argv);
 257                 winsize.ws_row = 0;
 258                 ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&winsize);
 259                 if (winsize.ws_row > 0)
 260                         winlines = winsize.ws_row;
 261
 262         }
 263
 264 #define BACKWARD_COMPATIBILITY
 265 #ifdef  BACKWARD_COMPATIBILITY
 266         if (*argv) {
 267                 interval = atoi(*argv);
 268                 if (*++argv)
 269                         reps = atoi(*argv);
 270         }
 271 #endif
 272
 273         if (interval) {
 274                 if (!reps)
 275                         reps = -1;
 276         } else if (reps)
 277                 interval = 1;
 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 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 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 void
 383 dovmstat(u_int interval, int reps)
 384 {
 385         struct vmtotal total;
 386         time_t uptime, halfuptime;
 387         struct devinfo *tmp_dinfo;
 388         void needhdr();
 389         int vmm_size = sizeof(vmm);
 390         int vms_size = sizeof(vms);
 391         int vmt_size = sizeof(total);
 392
 393         uptime = getuptime();
 394         halfuptime = uptime / 2;
 395         signal(SIGCONT, needhdr);
 396
 397         for (hdrcnt = 1;;) {
 398                 if (!--hdrcnt)
 399                         printhdr();
 400                 if (kinfo_get_sched_cputime(&cp_time))
 401                         err(1, "kinfo_get_sched_cputime");
 402
 403                 tmp_dinfo = last.dinfo;
 404                 last.dinfo = cur.dinfo;
 405                 cur.dinfo = tmp_dinfo;
 406                 last.busy_time = cur.busy_time;
 407
 408                 /*
 409                  * Here what we want to do is refresh our device stats.
 410                  * getdevs() returns 1 when the device list has changed.
 411                  * If the device list has changed, we want to go through
 412                  * the selection process again, in case a device that we
 413                  * were previously displaying has gone away.
 414                  */
 415                 switch (getdevs(&cur)) {
 416                 case -1:
 417                         errx(1, "%s", devstat_errbuf);
 418                         break;
 419                 case 1: {
 420                         int retval;
 421
 422                         num_devices = cur.dinfo->numdevs;
 423                         generation = cur.dinfo->generation;
 424
 425                         retval = selectdevs(&dev_select, &num_selected,
 426                                             &num_selections, &select_generation,
 427                                             generation, cur.dinfo->devices,
 428                                             num_devices, matches, num_matches,
 429                                             specified_devices,
 430                                             num_devices_specified, select_mode,
 431                                             maxshowdevs, 0);
 432                         switch (retval) {
 433                         case -1:
 434                                 errx(1, "%s", devstat_errbuf);
 435                                 break;
 436                         case 1:
 437                                 printhdr();
 438                                 break;
 439                         default:
 440                                 break;
 441                         }
 442                 }
 443                 default:
 444                         break;
 445                 }
 446
 447                 if (sysctlbyname("vm.vmstats", &vms, &vms_size, NULL, 0)) {
 448                         perror("sysctlbyname: vm.vmstats");
 449                         exit(1);
 450                 }
 451                 if (sysctlbyname("vm.vmmeter", &vmm, &vmm_size, NULL, 0)) {
 452                         perror("sysctlbyname: vm.vmmeter");
 453                         exit(1);
 454                 }
 455                 if (sysctlbyname("vm.vmtotal", &total, &vmt_size, NULL, 0)) {
 456                         perror("sysctlbyname: vm.vmtotal");
 457                         exit(1);
 458                 }
 459                 printf("%2d %1d %1d",
 460                     total.t_rq - 1, total.t_dw + total.t_pw, total.t_sw);
 461 #define vmstat_pgtok(a) ((a) * vms.v_page_size >> 10)
 462 #define rate(x) (((x) + halfuptime) / uptime)   /* round */
 463                 printf(" %7ld %6ld ",
 464                     (long)vmstat_pgtok(total.t_avm), (long)vmstat_pgtok(total.t_free));
 465                 printf("%4lu ",
 466                     (u_long)rate(vmm.v_vm_faults - ovmm.v_vm_faults));
 467                 printf("%3lu ",
 468                     (u_long)rate(vmm.v_reactivated - ovmm.v_reactivated));
 469                 printf("%3lu ",
 470                     (u_long)rate(vmm.v_swapin + vmm.v_vnodein -
 471                     (ovmm.v_swapin + ovmm.v_vnodein)));
 472                 printf("%3lu ",
 473                     (u_long)rate(vmm.v_swapout + vmm.v_vnodeout -
 474                     (ovmm.v_swapout + ovmm.v_vnodeout)));
 475                 printf("%3lu ",
 476                     (u_long)rate(vmm.v_tfree - ovmm.v_tfree));
 477                 printf("%3lu ",
 478                     (u_long)rate(vmm.v_pdpages - ovmm.v_pdpages));
 479                 devstats();
 480                 printf("%4lu %4lu %3lu ",
 481                     (u_long)rate(vmm.v_intr - ovmm.v_intr),
 482                     (u_long)rate(vmm.v_syscall - ovmm.v_syscall),
 483                     (u_long)rate(vmm.v_swtch - ovmm.v_swtch));
 484                 cpustats();
 485                 printf("\n");
 486                 fflush(stdout);
 487                 if (reps >= 0 && --reps <= 0)
 488                         break;
 489                 ovmm = vmm;
 490                 uptime = interval;
 491                 /*
 492                  * We round upward to avoid losing low-frequency events
 493                  * (i.e., >= 1 per interval but < 1 per second).
 494                  */
 495                 if (interval != 1)
 496                         halfuptime = (uptime + 1) / 2;
 497                 else
 498                         halfuptime = 0;
 499                 sleep(interval);
 500         }
 501 }
 502
 503 void
 504 printhdr(void)
 505 {
 506         int i, num_shown;
 507
 508         num_shown = (num_selected < maxshowdevs) ? num_selected : maxshowdevs;
 509         printf(" procs      memory      page%*s", 19, "");
 510         if (num_shown > 1)
 511                 printf(" disks %*s", num_shown * 4 - 7, "");
 512         else if (num_shown == 1)
 513                 printf("disk");
 514         printf("   faults      cpu\n");
 515         printf(" r b w     avm    fre  flt  re  pi  po  fr  sr ");
 516         for (i = 0; i < num_devices; i++)
 517                 if ((dev_select[i].selected)
 518                  && (dev_select[i].selected <= maxshowdevs))
 519                         printf("%c%c%d ", dev_select[i].device_name[0],
 520                                      dev_select[i].device_name[1],
 521                                      dev_select[i].unit_number);
 522         printf("  in   sy  cs us sy id\n");
 523         hdrcnt = winlines - 2;
 524 }
 525
 526 /*
 527  * Force a header to be prepended to the next output.
 528  */
 529 void
 530 needhdr(void)
 531 {
 532
 533         hdrcnt = 1;
 534 }
 535
 536 long
 537 pct(long top, long bot)
 538 {
 539         long ans;
 540
 541         if (bot == 0)
 542                 return(0);
 543         ans = (quad_t)top * 100 / bot;
 544         return (ans);
 545 }
 546
 547 #define PCT(top, bot) pct((long)(top), (long)(bot))
 548
 549 void
 550 dosum(void)
 551 {
 552         struct nchstats *nch_tmp, nchstats;
 553         int vms_size = sizeof(vms);
 554         int vmm_size = sizeof(vmm);
 555         int cpucnt;
 556         u_long nchtotal;
 557         size_t nch_size = sizeof(struct nchstats) * SMP_MAXCPU;
 558
 559         if (sysctlbyname("vm.vmstats", &vms, &vms_size, NULL, 0)) {
 560                 perror("sysctlbyname: vm.vmstats");
 561                 exit(1);
 562         }
 563         if (sysctlbyname("vm.vmmeter", &vmm, &vmm_size, NULL, 0)) {
 564                 perror("sysctlbyname: vm.vmstats");
 565                 exit(1);
 566         }
 567         printf("%9u cpu context switches\n", vmm.v_swtch);
 568         printf("%9u device interrupts\n", vmm.v_intr);
 569         printf("%9u software interrupts\n", vmm.v_soft);
 570         printf("%9u traps\n", vmm.v_trap);
 571         printf("%9u system calls\n", vmm.v_syscall);
 572         printf("%9u kernel threads created\n", vmm.v_kthreads);
 573         printf("%9u  fork() calls\n", vmm.v_forks);
 574         printf("%9u vfork() calls\n", vmm.v_vforks);
 575         printf("%9u rfork() calls\n", vmm.v_rforks);
 576         printf("%9u exec() calls\n", vmm.v_exec);
 577         printf("%9u swap pager pageins\n", vmm.v_swapin);
 578         printf("%9u swap pager pages paged in\n", vmm.v_swappgsin);
 579         printf("%9u swap pager pageouts\n", vmm.v_swapout);
 580         printf("%9u swap pager pages paged out\n", vmm.v_swappgsout);
 581         printf("%9u vnode pager pageins\n", vmm.v_vnodein);
 582         printf("%9u vnode pager pages paged in\n", vmm.v_vnodepgsin);
 583         printf("%9u vnode pager pageouts\n", vmm.v_vnodeout);
 584         printf("%9u vnode pager pages paged out\n", vmm.v_vnodepgsout);
 585         printf("%9u page daemon wakeups\n", vmm.v_pdwakeups);
 586         printf("%9u pages examined by the page daemon\n", vmm.v_pdpages);
 587         printf("%9u pages reactivated\n", vmm.v_reactivated);
 588         printf("%9u copy-on-write faults\n", vmm.v_cow_faults);
 589         printf("%9u copy-on-write optimized faults\n", vmm.v_cow_optim);
 590         printf("%9u zero fill pages zeroed\n", vmm.v_zfod);
 591         printf("%9u zero fill pages prezeroed\n", vmm.v_ozfod);
 592         printf("%9u intransit blocking page faults\n", vmm.v_intrans);
 593         printf("%9u total VM faults taken\n", vmm.v_vm_faults);
 594         printf("%9u pages affected by kernel thread creation\n", vmm.v_kthreadpages);
 595         printf("%9u pages affected by  fork()\n", vmm.v_forkpages);
 596         printf("%9u pages affected by vfork()\n", vmm.v_vforkpages);
 597         printf("%9u pages affected by rfork()\n", vmm.v_rforkpages);
 598         printf("%9u pages freed\n", vmm.v_tfree);
 599         printf("%9u pages freed by daemon\n", vmm.v_dfree);
 600         printf("%9u pages freed by exiting processes\n", vmm.v_pfree);
 601         printf("%9u pages active\n", vms.v_active_count);
 602         printf("%9u pages inactive\n", vms.v_inactive_count);
 603         printf("%9u pages in VM cache\n", vms.v_cache_count);
 604         printf("%9u pages wired down\n", vms.v_wire_count);
 605         printf("%9u pages free\n", vms.v_free_count);
 606         printf("%9u bytes per page\n", vms.v_page_size);
 607
 608         if ((nch_tmp = malloc(nch_size)) == NULL) {
 609                 perror("malloc");
 610                 exit(1);
 611         } else {
 612                 if (sysctlbyname("vfs.cache.nchstats", nch_tmp, &nch_size, NULL, 0)) {
 613                         perror("sysctlbyname vfs.cache.nchstats");
 614                         free(nch_tmp);
 615                         exit(1);
 616                 } else {
 617                         if ((nch_tmp = realloc(nch_tmp, nch_size)) == NULL) {
 618                                 perror("realloc");
 619                                 exit(1);
 620                         }
 621                 }
 622         }
 623
 624         cpucnt = nch_size / sizeof(struct nchstats);
 625         kvm_nch_cpuagg(nch_tmp, &nchstats, cpucnt);
 626
 627         nchtotal = nchstats.ncs_goodhits + nchstats.ncs_neghits +
 628             nchstats.ncs_badhits + nchstats.ncs_falsehits +
 629             nchstats.ncs_miss + nchstats.ncs_long;
 630         printf("%9ld total name lookups\n", nchtotal);
 631         printf(
 632             "%9s cache hits (%ld%% pos + %ld%% neg) system %ld%% per-directory\n",
 633             "", PCT(nchstats.ncs_goodhits, nchtotal),
 634             PCT(nchstats.ncs_neghits, nchtotal),
 635             PCT(nchstats.ncs_pass2, nchtotal));
 636         printf("%9s deletions %ld%%, falsehits %ld%%, toolong %ld%%\n", "",
 637             PCT(nchstats.ncs_badhits, nchtotal),
 638             PCT(nchstats.ncs_falsehits, nchtotal),
 639             PCT(nchstats.ncs_long, nchtotal));
 640         free(nch_tmp);
 641 }
 642
 643 #ifdef notyet
 644 void
 645 doforkst(void)
 646 {
 647         struct forkstat fks;
 648
 649         kread(X_FORKSTAT, &fks, sizeof(struct forkstat));
 650         printf("%d forks, %d pages, average %.2f\n",
 651             fks.cntfork, fks.sizfork, (double)fks.sizfork / fks.cntfork);
 652         printf("%d vforks, %d pages, average %.2f\n",
 653             fks.cntvfork, fks.sizvfork, (double)fks.sizvfork / fks.cntvfork);
 654 }
 655 #endif
 656
 657 static void
 658 devstats(void)
 659 {
 660         int dn, state;
 661         long double transfers_per_second;
 662         long double busy_seconds;
 663         long tmp;
 664
 665         diff_cp_time.cp_user = cp_time.cp_user - old_cp_time.cp_user;
 666         diff_cp_time.cp_nice = cp_time.cp_nice - old_cp_time.cp_nice;
 667         diff_cp_time.cp_sys = cp_time.cp_sys - old_cp_time.cp_sys;
 668         diff_cp_time.cp_intr = cp_time.cp_intr - old_cp_time.cp_intr;
 669         diff_cp_time.cp_idle = cp_time.cp_idle - old_cp_time.cp_idle;
 670         old_cp_time = cp_time;
 671
 672         busy_seconds = compute_etime(cur.busy_time, last.busy_time);
 673
 674         for (dn = 0; dn < num_devices; dn++) {
 675                 int di;
 676
 677                 if ((dev_select[dn].selected == 0)
 678                  || (dev_select[dn].selected > maxshowdevs))
 679                         continue;
 680
 681                 di = dev_select[dn].position;
 682
 683                 if (compute_stats(&cur.dinfo->devices[di],
 684                                   &last.dinfo->devices[di], busy_seconds,
 685                                   NULL, NULL, NULL,
 686                                   NULL, &transfers_per_second, NULL,
 687                                   NULL, NULL) != 0)
 688                         errx(1, "%s", devstat_errbuf);
 689
 690                 printf("%3.0Lf ", transfers_per_second);
 691         }
 692 }
 693
 694 void
 695 cpustats(void)
 696 {
 697         uint64_t total;
 698         double pct;
 699
 700         total = diff_cp_time.cp_user + diff_cp_time.cp_nice +
 701             diff_cp_time.cp_sys + diff_cp_time.cp_intr + diff_cp_time.cp_idle;
 702
 703         if (total)
 704                 pct = 100.0 / total;
 705         else
 706                 pct = 0;
 707         printf("%2.0f ", (diff_cp_time.cp_user + diff_cp_time.cp_nice) * pct);
 708         printf("%2.0f ", (diff_cp_time.cp_sys + diff_cp_time.cp_intr) * pct);
 709         printf("%2.0f", diff_cp_time.cp_idle * pct);
 710 }
 711
 712 void
 713 dointr(void)
 714 {
 715         u_long *intrcnt, uptime;
 716         u_int64_t inttotal;
 717         int nintr, inamlen;
 718         char *intrname;
 719
 720         uptime = getuptime();
 721         nintr = namelist[X_EINTRCNT].n_value - namelist[X_INTRCNT].n_value;
 722         inamlen =
 723             namelist[X_EINTRNAMES].n_value - namelist[X_INTRNAMES].n_value;
 724         intrcnt = malloc((size_t)nintr);
 725         intrname = malloc((size_t)inamlen);
 726         if (intrcnt == NULL || intrname == NULL)
 727                 errx(1, "malloc");
 728         kread(X_INTRCNT, intrcnt, (size_t)nintr);
 729         kread(X_INTRNAMES, intrname, (size_t)inamlen);
 730         printf("interrupt                   total       rate\n");
 731         inttotal = 0;
 732         nintr /= sizeof(long);
 733         while (--nintr >= 0) {
 734                 if (intrname[0] || *intrcnt) {
 735                     printf("%-12s %20lu %10lu\n", intrname,
 736                             *intrcnt, *intrcnt / uptime);
 737                 }
 738                 intrname += strlen(intrname) + 1;
 739                 inttotal += *intrcnt++;
 740         }
 741         printf("Total        %20llu %10llu\n", inttotal,
 742                         inttotal / (u_int64_t) uptime);
 743 }
 744
 745 #define MAX_KMSTATS     200
 746
 747 static
 748 long
 749 cpuagg(long *ary)
 750 {
 751     int i;
 752     long ttl;
 753
 754     for (i = ttl = 0; i < SMP_MAXCPU; ++i)
 755         ttl += ary[i];
 756     return(ttl);
 757 }
 758
 759 void
 760 domem(void)
 761 {
 762         struct malloc_type *ks;
 763         int i, j;
 764         int first, nkms;
 765         long totuse = 0, totfree = 0, totreq = 0;
 766         struct malloc_type kmemstats[MAX_KMSTATS], *kmsp;
 767         char buf[1024];
 768
 769         kread(X_KMEMSTATISTICS, &kmsp, sizeof(kmsp));
 770         for (nkms = 0; nkms < MAX_KMSTATS && kmsp != NULL; nkms++) {
 771                 if (sizeof(kmemstats[0]) != kvm_read(kd, (u_long)kmsp,
 772                     &kmemstats[nkms], sizeof(kmemstats[0])))
 773                         err(1, "kvm_read(%p)", (void *)kmsp);
 774                 if (sizeof(buf) !=  kvm_read(kd,
 775                     (u_long)kmemstats[nkms].ks_shortdesc, buf, sizeof(buf)))
 776                         err(1, "kvm_read(%p)",
 777                             (void *)kmemstats[nkms].ks_shortdesc);
 778                 buf[sizeof(buf) - 1] = '\0';
 779                 kmemstats[nkms].ks_shortdesc = strdup(buf);
 780                 kmsp = kmemstats[nkms].ks_next;
 781         }
 782         if (kmsp != NULL)
 783                 warnx("truncated to the first %d memory types", nkms);
 784
 785         printf(
 786             "\nMemory statistics by type                          Type  Kern\n");
 787         printf(
 788 "        Type  InUse MemUse HighUse  Limit Requests Limit Limit Size(s)\n");
 789         for (i = 0, ks = &kmemstats[0]; i < nkms; i++, ks++) {
 790                 if (ks->ks_calls == 0)
 791                         continue;
 792                 printf("%13s%6ld%6ldK%7ldK%6ldK%9lld%5u%6u",
 793                     ks->ks_shortdesc,
 794                     cpuagg(ks->ks_inuse), (cpuagg(ks->ks_memuse) + 1023) / 1024,
 795                     (ks->ks_maxused + 1023) / 1024,
 796                     (ks->ks_limit + 1023) / 1024, ks->ks_calls,
 797                     ks->ks_limblocks, ks->ks_mapblocks);
 798                 first = 1;
 799                 for (j =  1 << MINBUCKET; j < 1 << (MINBUCKET + 16); j <<= 1) {
 800                         if ((ks->ks_size & j) == 0)
 801                                 continue;
 802                         if (first)
 803                                 printf("  ");
 804                         else
 805                                 printf(",");
 806                         if(j<1024)
 807                                 printf("%d",j);
 808                         else
 809                                 printf("%dK",j>>10);
 810                         first = 0;
 811                 }
 812                 printf("\n");
 813                 totuse += cpuagg(ks->ks_memuse);
 814                 totreq += ks->ks_calls;
 815         }
 816         printf("\nMemory Totals:  In Use    Free    Requests\n");
 817         printf("              %7ldK %6ldK    %8ld\n",
 818              (totuse + 1023) / 1024, (totfree + 1023) / 1024, totreq);
 819 }
 820
 821 void
 822 dozmem(void)
 823 {
 824         char *buf;
 825         size_t bufsize;
 826
 827         buf = NULL;
 828         bufsize = 1024;
 829         for (;;) {
 830                 if ((buf = realloc(buf, bufsize)) == NULL)
 831                         err(1, "realloc()");
 832                 if (sysctlbyname("vm.zone", buf, &bufsize, 0, NULL) == 0)
 833                         break;
 834                 if (errno != ENOMEM)
 835                         err(1, "sysctl()");
 836                 bufsize *= 2;
 837         }
 838         buf[bufsize] = '\0'; /* play it safe */
 839         printf("%s\n\n", buf);
 840         free(buf);
 841 }
 842
 843 /*
 844  * kread reads something from the kernel, given its nlist index.
 845  */
 846 void
 847 kread(int nlx, void *addr, size_t size)
 848 {
 849         const char *sym;
 850
 851         if (namelist[nlx].n_type == 0 || namelist[nlx].n_value == 0) {
 852                 sym = namelist[nlx].n_name;
 853                 if (*sym == '_')
 854                         ++sym;
 855                 errx(1, "symbol %s not defined", sym);
 856         }
 857         if (kvm_read(kd, namelist[nlx].n_value, addr, size) != size) {
 858                 sym = namelist[nlx].n_name;
 859                 if (*sym == '_')
 860                         ++sym;
 861                 errx(1, "%s: %s", sym, kvm_geterr(kd));
 862         }
 863 }
 864
 865 void
 866 usage(void)
 867 {
 868         fprintf(stderr, "%s%s",
 869                 "usage: vmstat [-imsz] [-c count] [-M core] [-N system] [-w wait]\n",
 870                 "              [-n devs] [disks]\n");
 871         exit(1);
 872 }