vmstat: ks_limit is size_t not ssize_t
[dragonfly.git] / 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 1.23 2008/02/19 18:19:15 thomas Exp $
37  */
38
39 #include <sys/user.h>
40 #include <sys/param.h>
41 #include <sys/time.h>
42 #include <sys/uio.h>
43 #include <sys/namei.h>
44 #include <sys/malloc.h>
45 #include <sys/signal.h>
46 #include <sys/fcntl.h>
47 #include <sys/ioctl.h>
48 #include <sys/sysctl.h>
49 #include <sys/vmmeter.h>
50 #include <sys/interrupt.h>
51
52 #include <vm/vm_param.h>
53
54 #include <ctype.h>
55 #include <err.h>
56 #include <errno.h>
57 #include <kinfo.h>
58 #include <kvm.h>
59 #include <limits.h>
60 #include <nlist.h>
61 #include <paths.h>
62 #include <stdio.h>
63 #include <stdlib.h>
64 #include <string.h>
65 #include <sysexits.h>
66 #include <time.h>
67 #include <unistd.h>
68 #include <devstat.h>
69
70 static struct nlist namelist[] = {
71 #define X_BOOTTIME      0
72         { "_boottime",  0, 0, 0, 0 },
73 #define X_NCHSTATS      1
74         { "_nchstats",  0, 0, 0, 0 },
75 #define X_KMEMSTATISTICS        2
76         { "_kmemstatistics",    0, 0, 0, 0 },
77 #define X_ZLIST         3
78         { "_zlist",     0, 0, 0, 0 },
79 #ifdef notyet
80 #define X_DEFICIT       4
81         { "_deficit",   0, 0, 0, 0 },
82 #define X_FORKSTAT      5
83         { "_forkstat",  0, 0, 0, 0 },
84 #define X_REC           6
85         { "_rectime",   0, 0, 0, 0 },
86 #define X_PGIN          7
87         { "_pgintime",  0, 0, 0, 0 },
88 #define X_XSTATS        8
89         { "_xstats",    0, 0, 0, 0 },
90 #define X_END           9
91 #else
92 #define X_END           4
93 #endif
94         { "", 0, 0, 0, 0 },
95 };
96
97 struct statinfo cur, last;
98 int num_devices, maxshowdevs;
99 long generation;
100 struct device_selection *dev_select;
101 int num_selected;
102 struct devstat_match *matches;
103 int num_matches = 0;
104 int num_devices_specified, num_selections;
105 long select_generation;
106 char **specified_devices;
107 devstat_select_mode select_mode;
108
109 struct  vmmeter vmm, ovmm;
110 struct  vmstats vms, ovms;
111
112 int     winlines = 20;
113 int     nflag = 0;
114 int     verbose = 0;
115
116 kvm_t *kd;
117
118 struct kinfo_cputime cp_time, old_cp_time, diff_cp_time;
119
120 #define FORKSTAT        0x01
121 #define INTRSTAT        0x02
122 #define MEMSTAT         0x04
123 #define SUMSTAT         0x08
124 #define TIMESTAT        0x10
125 #define VMSTAT          0x20
126 #define ZMEMSTAT        0x40
127
128 static void cpustats(void);
129 static void dointr(void);
130 static void domem(void);
131 static void dosum(void);
132 static void dozmem(void);
133 static void dovmstat(u_int, int);
134 static void kread(int, void *, size_t);
135 static void usage(void);
136 static char **getdrivedata(char **);
137 static long getuptime(void);
138 static void needhdr(int);
139 static long pct(long, long);
140
141 #ifdef notyet
142 static void dotimes(void); /* Not implemented */
143 static void doforkst(void);
144 #endif
145 static void printhdr(void);
146 static void devstats(void);
147
148 int
149 main(int argc, char **argv)
150 {
151         int c, todo;
152         u_int interval;         /* milliseconds */
153         int reps;
154         char *memf, *nlistf;
155         char errbuf[_POSIX2_LINE_MAX];
156
157         memf = nlistf = NULL;
158         interval = reps = todo = 0;
159         maxshowdevs = 2;
160         while ((c = getopt(argc, argv, "c:fiM:mN:n:p:stvw:z")) != -1) {
161                 switch (c) {
162                 case 'c':
163                         reps = atoi(optarg);
164                         break;
165                 case 'f':
166 #ifdef notyet
167                         todo |= FORKSTAT;
168 #else
169                         errx(EX_USAGE, "sorry, -f is not (re)implemented yet");
170 #endif
171                         break;
172                 case 'i':
173                         todo |= INTRSTAT;
174                         break;
175                 case 'M':
176                         memf = optarg;
177                         break;
178                 case 'm':
179                         todo |= MEMSTAT;
180                         break;
181                 case 'N':
182                         nlistf = optarg;
183                         break;
184                 case 'n':
185                         nflag = 1;
186                         maxshowdevs = atoi(optarg);
187                         if (maxshowdevs < 0)
188                                 errx(1, "number of devices %d is < 0",
189                                      maxshowdevs);
190                         break;
191                 case 'p':
192                         if (buildmatch(optarg, &matches, &num_matches) != 0)
193                                 errx(1, "%s", devstat_errbuf);
194                         break;
195                 case 's':
196                         todo |= SUMSTAT;
197                         break;
198                 case 't':
199 #ifdef notyet
200                         todo |= TIMESTAT;
201 #else
202                         errx(EX_USAGE, "sorry, -t is not (re)implemented yet");
203 #endif
204                         break;
205                 case 'v':
206                         ++verbose;
207                         break;
208                 case 'w':
209                         interval = (u_int)(strtod(optarg, NULL) * 1000.0);
210                         break;
211                 case 'z':
212                         todo |= ZMEMSTAT;
213                         break;
214                 default:
215                         usage();
216                 }
217         }
218         argc -= optind;
219         argv += optind;
220
221         if (todo == 0)
222                 todo = VMSTAT;
223
224         /*
225          * Discard setgid privileges if not the running kernel so that bad
226          * guys can't print interesting stuff from kernel memory.
227          */
228         if (nlistf != NULL || memf != NULL)
229                 setgid(getgid());
230
231         kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf);
232         if (kd == 0) 
233                 errx(1, "kvm_openfiles: %s", errbuf);
234
235         if ((c = kvm_nlist(kd, namelist)) != 0) {
236                 if (c > 0) {
237                         warnx("undefined symbols:");
238                         for (c = 0; c < (int)__arysize(namelist); c++)
239                                 if (namelist[c].n_type == 0)
240                                         fprintf(stderr, " %s",
241                                             namelist[c].n_name);
242                         fputc('\n', stderr);
243                 } else
244                         warnx("kvm_nlist: %s", kvm_geterr(kd));
245                 exit(1);
246         }
247
248         if (todo & VMSTAT) {
249                 struct winsize winsize;
250
251                 /*
252                  * Make sure that the userland devstat version matches the
253                  * kernel devstat version.  If not, exit and print a
254                  * message informing the user of his mistake.
255                  */
256                 if (checkversion() < 0)
257                         errx(1, "%s", devstat_errbuf);
258
259
260                 argv = getdrivedata(argv);
261                 winsize.ws_row = 0;
262                 ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&winsize);
263                 if (winsize.ws_row > 0)
264                         winlines = winsize.ws_row;
265
266         }
267
268 #define BACKWARD_COMPATIBILITY
269 #ifdef  BACKWARD_COMPATIBILITY
270         if (*argv) {
271                 interval = (u_int)(strtod(*argv, NULL) * 1000.0);
272                 if (*++argv)
273                         reps = atoi(*argv);
274         }
275 #endif
276
277         if (interval) {
278                 if (!reps)
279                         reps = -1;
280         } else if (reps) {
281                 interval = 1000;
282         }
283
284 #ifdef notyet
285         if (todo & FORKSTAT)
286                 doforkst();
287 #endif
288         if (todo & MEMSTAT)
289                 domem();
290         if (todo & ZMEMSTAT)
291                 dozmem();
292         if (todo & SUMSTAT)
293                 dosum();
294 #ifdef notyet
295         if (todo & TIMESTAT)
296                 dotimes();
297 #endif
298         if (todo & INTRSTAT)
299                 dointr();
300         if (todo & VMSTAT)
301                 dovmstat(interval, reps);
302         exit(0);
303 }
304
305 static char **
306 getdrivedata(char **argv)
307 {
308         if ((num_devices = getnumdevs()) < 0)
309                 errx(1, "%s", devstat_errbuf);
310
311         cur.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
312         last.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
313         bzero(cur.dinfo, sizeof(struct devinfo));
314         bzero(last.dinfo, sizeof(struct devinfo));
315
316         if (getdevs(&cur) == -1)
317                 errx(1, "%s", devstat_errbuf);
318
319         num_devices = cur.dinfo->numdevs;
320         generation = cur.dinfo->generation;
321
322         specified_devices = (char **)malloc(sizeof(char *));
323         for (num_devices_specified = 0; *argv; ++argv) {
324                 if (isdigit(**argv))
325                         break;
326                 num_devices_specified++;
327                 specified_devices = (char **)realloc(specified_devices,
328                                                      sizeof(char *) *
329                                                      num_devices_specified);
330                 specified_devices[num_devices_specified - 1] = *argv;
331         }
332         dev_select = NULL;
333
334         if (nflag == 0 && maxshowdevs < num_devices_specified)
335                         maxshowdevs = num_devices_specified;
336
337         /*
338          * People are generally only interested in disk statistics when
339          * they're running vmstat.  So, that's what we're going to give
340          * them if they don't specify anything by default.  We'll also give
341          * them any other random devices in the system so that we get to
342          * maxshowdevs devices, if that many devices exist.  If the user
343          * specifies devices on the command line, either through a pattern
344          * match or by naming them explicitly, we will give the user only
345          * those devices.
346          */
347         if ((num_devices_specified == 0) && (num_matches == 0)) {
348                 if (buildmatch("da", &matches, &num_matches) != 0)
349                         errx(1, "%s", devstat_errbuf);
350
351                 select_mode = DS_SELECT_ADD;
352         } else
353                 select_mode = DS_SELECT_ONLY;
354
355         /*
356          * At this point, selectdevs will almost surely indicate that the
357          * device list has changed, so we don't look for return values of 0
358          * or 1.  If we get back -1, though, there is an error.
359          */
360         if (selectdevs(&dev_select, &num_selected, &num_selections,
361                        &select_generation, generation, cur.dinfo->devices,
362                        num_devices, matches, num_matches, specified_devices,
363                        num_devices_specified, select_mode,
364                        maxshowdevs, 0) == -1)
365                 errx(1, "%s", devstat_errbuf);
366
367         return(argv);
368 }
369
370 static long
371 getuptime(void)
372 {
373         static time_t now, boottime;
374         time_t uptime;
375
376         if (boottime == 0)
377                 kread(X_BOOTTIME, &boottime, sizeof(boottime));
378         time(&now);
379         uptime = now - boottime;
380         if (uptime <= 0 || uptime > 60*60*24*365*10)
381                 errx(1, "time makes no sense; namelist must be wrong");
382         return(uptime);
383 }
384
385 int     hdrcnt;
386
387 static void
388 dovmstat(u_int interval, int reps)
389 {
390         struct vmtotal total;
391         struct devinfo *tmp_dinfo;
392         size_t vmm_size = sizeof(vmm);
393         size_t vms_size = sizeof(vms);
394         size_t vmt_size = sizeof(total);
395         int initial = 1;
396
397         signal(SIGCONT, needhdr);
398
399         for (hdrcnt = 1;;) {
400                 if (!--hdrcnt)
401                         printhdr();
402                 if (kinfo_get_sched_cputime(&cp_time))
403                         err(1, "kinfo_get_sched_cputime");
404
405                 tmp_dinfo = last.dinfo;
406                 last.dinfo = cur.dinfo;
407                 cur.dinfo = tmp_dinfo;
408                 last.busy_time = cur.busy_time;
409
410                 /*
411                  * Here what we want to do is refresh our device stats.
412                  * getdevs() returns 1 when the device list has changed.
413                  * If the device list has changed, we want to go through
414                  * the selection process again, in case a device that we
415                  * were previously displaying has gone away.
416                  */
417                 switch (getdevs(&cur)) {
418                 case -1:
419                         errx(1, "%s", devstat_errbuf);
420                         break;
421                 case 1: {
422                         int retval;
423
424                         num_devices = cur.dinfo->numdevs;
425                         generation = cur.dinfo->generation;
426
427                         retval = selectdevs(&dev_select, &num_selected,
428                                             &num_selections, &select_generation,
429                                             generation, cur.dinfo->devices,
430                                             num_devices, matches, num_matches,
431                                             specified_devices,
432                                             num_devices_specified, select_mode,
433                                             maxshowdevs, 0);
434                         switch (retval) {
435                         case -1:
436                                 errx(1, "%s", devstat_errbuf);
437                                 break;
438                         case 1:
439                                 printhdr();
440                                 break;
441                         default:
442                                 break;
443                         }
444                 }
445                 default:
446                         break;
447                 }
448
449                 if (sysctlbyname("vm.vmstats", &vms, &vms_size, NULL, 0)) {
450                         perror("sysctlbyname: vm.vmstats");
451                         exit(1);
452                 }
453                 if (sysctlbyname("vm.vmmeter", &vmm, &vmm_size, NULL, 0)) {
454                         perror("sysctlbyname: vm.vmmeter");
455                         exit(1);
456                 } 
457                 if (sysctlbyname("vm.vmtotal", &total, &vmt_size, NULL, 0)) {
458                         perror("sysctlbyname: vm.vmtotal");
459                         exit(1);
460                 } 
461                 printf("%2ld %1ld %1ld",
462                     total.t_rq - 1, total.t_dw + total.t_pw, total.t_sw);
463
464 #define vmstat_pgtok(a) \
465         (intmax_t)(((intmax_t)(a) * vms.v_page_size) >> 10)
466 #define rate(x)         \
467         (intmax_t)(initial ? (x) : ((intmax_t)(x) * 1000 + interval / 2) \
468                                    / interval)
469
470                 printf(" %7jd %6jd ",
471                        vmstat_pgtok(total.t_avm),
472                        vmstat_pgtok(total.t_free));
473                 printf("%4ju ",
474                        rate(vmm.v_vm_faults - ovmm.v_vm_faults));
475                 printf("%3ju ",
476                        rate(vmm.v_reactivated - ovmm.v_reactivated));
477                 printf("%3ju ",
478                        rate(vmm.v_swapin + vmm.v_vnodein -
479                             (ovmm.v_swapin + ovmm.v_vnodein)));
480                 printf("%3ju ",
481                        rate(vmm.v_swapout + vmm.v_vnodeout -
482                             (ovmm.v_swapout + ovmm.v_vnodeout)));
483                 printf("%3ju ",
484                        rate(vmm.v_tfree - ovmm.v_tfree));
485                 printf("%3ju ",
486                        rate(vmm.v_pdpages - ovmm.v_pdpages));
487                 devstats();
488                 printf("%4ju %4ju %3ju ",
489                        rate(vmm.v_intr - ovmm.v_intr),
490                        rate(vmm.v_syscall - ovmm.v_syscall),
491                        rate(vmm.v_swtch - ovmm.v_swtch));
492                 cpustats();
493                 printf("\n");
494                 fflush(stdout);
495                 if (reps >= 0 && --reps <= 0)
496                         break;
497                 ovmm = vmm;
498                 usleep(interval * 1000);
499                 initial = 0;
500         }
501 }
502
503 static 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 static void
530 needhdr(__unused int signo)
531 {
532
533         hdrcnt = 1;
534 }
535
536 static 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 static void
550 dosum(void)
551 {
552         struct nchstats *nch_tmp, nchstats;
553         size_t vms_size = sizeof(vms);
554         size_t vmm_size = sizeof(vmm);
555         int cpucnt;
556         u_long nchtotal;
557         u_long nchpathtotal;
558         size_t nch_size = sizeof(struct nchstats) * SMP_MAXCPU;
559
560         if (sysctlbyname("vm.vmstats", &vms, &vms_size, NULL, 0)) {
561                 perror("sysctlbyname: vm.vmstats");
562                 exit(1);
563         }
564         if (sysctlbyname("vm.vmmeter", &vmm, &vmm_size, NULL, 0)) {
565                 perror("sysctlbyname: vm.vmstats");
566                 exit(1);
567         }
568         printf("%9u cpu context switches\n", vmm.v_swtch);
569         printf("%9u device interrupts\n", vmm.v_intr);
570         printf("%9u software interrupts\n", vmm.v_soft);
571         printf("%9u traps\n", vmm.v_trap);
572         printf("%9u system calls\n", vmm.v_syscall);
573         printf("%9u kernel threads created\n", vmm.v_kthreads);
574         printf("%9u  fork() calls\n", vmm.v_forks);
575         printf("%9u vfork() calls\n", vmm.v_vforks);
576         printf("%9u rfork() calls\n", vmm.v_rforks);
577         printf("%9u exec() calls\n", vmm.v_exec);
578         printf("%9u swap pager pageins\n", vmm.v_swapin);
579         printf("%9u swap pager pages paged in\n", vmm.v_swappgsin);
580         printf("%9u swap pager pageouts\n", vmm.v_swapout);
581         printf("%9u swap pager pages paged out\n", vmm.v_swappgsout);
582         printf("%9u vnode pager pageins\n", vmm.v_vnodein);
583         printf("%9u vnode pager pages paged in\n", vmm.v_vnodepgsin);
584         printf("%9u vnode pager pageouts\n", vmm.v_vnodeout);
585         printf("%9u vnode pager pages paged out\n", vmm.v_vnodepgsout);
586         printf("%9u page daemon wakeups\n", vmm.v_pdwakeups);
587         printf("%9u pages examined by the page daemon\n", vmm.v_pdpages);
588         printf("%9u pages reactivated\n", vmm.v_reactivated);
589         printf("%9u copy-on-write faults\n", vmm.v_cow_faults);
590         printf("%9u copy-on-write optimized faults\n", vmm.v_cow_optim);
591         printf("%9u zero fill pages zeroed\n", vmm.v_zfod);
592         printf("%9u zero fill pages prezeroed\n", vmm.v_ozfod);
593         printf("%9u intransit blocking page faults\n", vmm.v_intrans);
594         printf("%9u total VM faults taken\n", vmm.v_vm_faults);
595         printf("%9u pages affected by kernel thread creation\n", vmm.v_kthreadpages);
596         printf("%9u pages affected by  fork()\n", vmm.v_forkpages);
597         printf("%9u pages affected by vfork()\n", vmm.v_vforkpages);
598         printf("%9u pages affected by rfork()\n", vmm.v_rforkpages);
599         printf("%9u pages freed\n", vmm.v_tfree);
600         printf("%9u pages freed by daemon\n", vmm.v_dfree);
601         printf("%9u pages freed by exiting processes\n", vmm.v_pfree);
602         printf("%9u pages active\n", vms.v_active_count);
603         printf("%9u pages inactive\n", vms.v_inactive_count);
604         printf("%9u pages in VM cache\n", vms.v_cache_count);
605         printf("%9u pages wired down\n", vms.v_wire_count);
606         printf("%9u pages free\n", vms.v_free_count);
607         printf("%9u bytes per page\n", vms.v_page_size);
608         printf("%9u global smp invltlbs\n", vmm.v_smpinvltlb);
609         
610         if ((nch_tmp = malloc(nch_size)) == NULL) {
611                 perror("malloc");
612                 exit(1);
613         } else {
614                 if (sysctlbyname("vfs.cache.nchstats", nch_tmp, &nch_size, NULL, 0)) {
615                         perror("sysctlbyname vfs.cache.nchstats");
616                         free(nch_tmp);
617                         exit(1);
618                 } else {
619                         if ((nch_tmp = realloc(nch_tmp, nch_size)) == NULL) {
620                                 perror("realloc");
621                                 exit(1);
622                         }
623                 }
624         }
625         
626         cpucnt = nch_size / sizeof(struct nchstats);
627         kvm_nch_cpuagg(nch_tmp, &nchstats, cpucnt);
628
629         nchtotal = nchstats.ncs_goodhits + nchstats.ncs_neghits +
630             nchstats.ncs_badhits + nchstats.ncs_falsehits +
631             nchstats.ncs_miss;
632         nchpathtotal = nchstats.ncs_longhits + nchstats.ncs_longmiss;
633         printf("%9ld total path lookups\n", nchpathtotal);
634         printf("%9ld total component lookups\n", nchtotal);
635         printf(
636             "%9s cache hits (%ld%% pos + %ld%% neg)\n",
637             "", PCT(nchstats.ncs_goodhits, nchtotal),
638             PCT(nchstats.ncs_neghits, nchtotal));
639         printf("%9s deletions %ld%%, falsehits %ld%%\n", "",
640             PCT(nchstats.ncs_badhits, nchtotal),
641             PCT(nchstats.ncs_falsehits, nchtotal));
642         free(nch_tmp);
643 }
644
645 #ifdef notyet
646 void
647 doforkst(void)
648 {
649         struct forkstat fks;
650
651         kread(X_FORKSTAT, &fks, sizeof(struct forkstat));
652         printf("%d forks, %d pages, average %.2f\n",
653             fks.cntfork, fks.sizfork, (double)fks.sizfork / fks.cntfork);
654         printf("%d vforks, %d pages, average %.2f\n",
655             fks.cntvfork, fks.sizvfork, (double)fks.sizvfork / fks.cntvfork);
656 }
657 #endif
658
659 static void
660 devstats(void)
661 {
662         int dn;
663         long double transfers_per_second;
664         long double busy_seconds;
665
666         diff_cp_time.cp_user = cp_time.cp_user - old_cp_time.cp_user;
667         diff_cp_time.cp_nice = cp_time.cp_nice - old_cp_time.cp_nice;
668         diff_cp_time.cp_sys = cp_time.cp_sys - old_cp_time.cp_sys;
669         diff_cp_time.cp_intr = cp_time.cp_intr - old_cp_time.cp_intr;
670         diff_cp_time.cp_idle = cp_time.cp_idle - old_cp_time.cp_idle;
671         old_cp_time = cp_time;
672
673         busy_seconds = compute_etime(cur.busy_time, last.busy_time);
674
675         for (dn = 0; dn < num_devices; dn++) {
676                 int di;
677
678                 if ((dev_select[dn].selected == 0)
679                  || (dev_select[dn].selected > maxshowdevs))
680                         continue;
681
682                 di = dev_select[dn].position;
683
684                 if (compute_stats(&cur.dinfo->devices[di],
685                                   &last.dinfo->devices[di], busy_seconds,
686                                   NULL, NULL, NULL,
687                                   NULL, &transfers_per_second, NULL,
688                                   NULL, NULL) != 0)
689                         errx(1, "%s", devstat_errbuf);
690
691                 printf("%3.0Lf ", transfers_per_second);
692         }
693 }
694
695 static void
696 cpustats(void)
697 {
698         uint64_t total;
699         double totusage;
700
701         total = diff_cp_time.cp_user + diff_cp_time.cp_nice +
702             diff_cp_time.cp_sys + diff_cp_time.cp_intr + diff_cp_time.cp_idle;
703
704         if (total)
705                 totusage = 100.0 / total;
706         else
707                 totusage = 0;
708         printf("%2.0f ",
709                (diff_cp_time.cp_user + diff_cp_time.cp_nice) * totusage);
710         printf("%2.0f ",
711                (diff_cp_time.cp_sys + diff_cp_time.cp_intr) * totusage);
712         printf("%2.0f",
713                diff_cp_time.cp_idle * totusage);
714 }
715
716 static void
717 dointr(void)
718 {
719         u_long *intrcnt, uptime;
720         u_int64_t inttotal;
721         size_t nintr, inamlen, i, size;
722         int nwidth;
723         char *intrstr;
724         char **intrname;
725
726         uptime = getuptime();
727         if (sysctlbyname("hw.intrnames", NULL, &inamlen, NULL, 0) != 0)
728                 errx(1, "sysctlbyname");
729         intrstr = malloc(inamlen);
730         if (intrstr == NULL)
731                 err(1, "malloc");
732         sysctlbyname("hw.intrnames", intrstr, &inamlen, NULL, 0);
733         for (nintr = 0, i = 0; i < inamlen; ++i) {
734                 if (intrstr[i] == 0)
735                         nintr++;
736         }
737         intrname = malloc(nintr * sizeof(char *));
738         for (i = 0; i < nintr; ++i) {
739                 intrname[i] = intrstr;
740                 intrstr += strlen(intrstr) + 1;
741         }
742
743         size = nintr * sizeof(*intrcnt);
744         intrcnt = calloc(nintr, sizeof(*intrcnt));
745         if (intrcnt == NULL)
746                 err(1, "malloc");
747         sysctlbyname("hw.intrcnt", intrcnt, &size, NULL, 0);
748
749         nwidth = 21;
750         for (i = 0; i < nintr; ++i) {
751                 if (nwidth < (int)strlen(intrname[i]))
752                         nwidth = (int)strlen(intrname[i]);
753         }
754         if (verbose) nwidth += 12;
755
756         printf("%-*.*s %11s %10s\n",
757                 nwidth, nwidth, "interrupt", "total", "rate");
758         inttotal = 0;
759         for (i = 0; i < nintr; ++i) {
760                 int named;
761                 char *infop, irqinfo[72];
762
763                 if ((named = strncmp(intrname[i], "irq", 3)) != 0 ||
764                     intrcnt[i] > 0) {
765                         infop = intrname[i];
766                         if (verbose) {
767                                 ssize_t irq, cpu;
768
769                                 irq = i % MAX_INTS;
770                                 cpu = i / MAX_INTS;
771                                 if (named) {
772                                         snprintf(irqinfo, sizeof(irqinfo),
773                                                  "irq%-3zd %3zd: %s",
774                                                  irq, cpu, intrname[i]);
775                                 } else {
776                                         snprintf(irqinfo, sizeof(irqinfo),
777                                                  "irq%-3zd %3zd: ", irq, cpu);
778                                 }
779                                 infop = irqinfo;
780                         }
781                         printf("%-*.*s %11lu %10lu\n", 
782                                 nwidth, nwidth, infop,
783                                 intrcnt[i], intrcnt[i] / uptime);
784                 }
785                 inttotal += intrcnt[i];
786         }
787         printf("%-*.*s %11llu %10llu\n", 
788                 nwidth, nwidth, "Total",
789                 (long long)inttotal, (long long)(inttotal / uptime));
790 }
791
792 #define MAX_KMSTATS     1024
793
794 static long
795 cpuagg(size_t *ary)
796 {
797     int i;
798     long ttl;
799
800     for (i = ttl = 0; i < SMP_MAXCPU; ++i)
801         ttl += ary[i];
802     return(ttl);
803 }
804
805 static void
806 domem(void)
807 {
808         struct malloc_type *ks;
809         int i, j;
810         int first, nkms;
811         long totuse = 0, totfree = 0, totreq = 0;
812         struct malloc_type kmemstats[MAX_KMSTATS], *kmsp;
813         char buf[1024];
814
815         kread(X_KMEMSTATISTICS, &kmsp, sizeof(kmsp));
816         for (nkms = 0; nkms < MAX_KMSTATS && kmsp != NULL; nkms++) {
817                 if (sizeof(kmemstats[0]) != kvm_read(kd, (u_long)kmsp,
818                     &kmemstats[nkms], sizeof(kmemstats[0])))
819                         err(1, "kvm_read(%p)", (void *)kmsp);
820                 if (sizeof(buf) !=  kvm_read(kd, 
821                     (u_long)kmemstats[nkms].ks_shortdesc, buf, sizeof(buf)))
822                         err(1, "kvm_read(%p)", 
823                             kmemstats[nkms].ks_shortdesc);
824                 buf[sizeof(buf) - 1] = '\0';
825                 kmemstats[nkms].ks_shortdesc = strdup(buf);
826                 kmsp = kmemstats[nkms].ks_next;
827         }
828         if (kmsp != NULL)
829                 warnx("truncated to the first %d memory types", nkms);
830
831         printf(
832             "\nMemory statistics by type                          Type  Kern\n");
833         printf(
834 "              Type   InUse  MemUse HighUse       Limit  Requests  Limit Limit\n");
835         for (i = 0, ks = &kmemstats[0]; i < nkms; i++, ks++) {
836                 if (ks->ks_calls == 0)
837                         continue;
838                 printf("%19s%7ld%7ldK%7ldK%11zuK%10jd%5u%6u",
839                     ks->ks_shortdesc,
840                     cpuagg(ks->ks_inuse), (cpuagg(ks->ks_memuse) + 1023) / 1024,
841                     (ks->ks_maxused + 1023) / 1024,
842                     (ks->ks_limit + 1023) / 1024, (intmax_t)ks->ks_calls,
843                     ks->ks_limblocks, ks->ks_mapblocks);
844                 first = 1;
845                 for (j =  1 << MINBUCKET; j < 1 << (MINBUCKET + 16); j <<= 1) {
846                         if ((ks->ks_size & j) == 0)
847                                 continue;
848                         if (first)
849                                 printf("  ");
850                         else
851                                 printf(",");
852                         if(j<1024)
853                                 printf("%d",j);
854                         else
855                                 printf("%dK",j>>10);
856                         first = 0;
857                 }
858                 printf("\n");
859                 totuse += cpuagg(ks->ks_memuse);
860                 totreq += ks->ks_calls;
861         }
862         printf("\nMemory Totals:  In Use    Free    Requests\n");
863         printf("              %7ldK %6ldK    %8ld\n",
864              (totuse + 1023) / 1024, (totfree + 1023) / 1024, totreq);
865 }
866
867 static void
868 dozmem(void)
869 {
870         char *buf;
871         size_t bufsize;
872
873         buf = NULL;
874         bufsize = 1024;
875         for (;;) {
876                 if ((buf = realloc(buf, bufsize)) == NULL)
877                         err(1, "realloc()");
878                 if (sysctlbyname("vm.zone", buf, &bufsize, NULL, 0) == 0)
879                         break;
880                 if (errno != ENOMEM)
881                         err(1, "sysctl()");
882                 bufsize *= 2;
883         }
884         buf[bufsize] = '\0'; /* play it safe */
885         printf("%s\n\n", buf);
886         free(buf);
887 }
888
889 /*
890  * kread reads something from the kernel, given its nlist index.
891  */
892 static void
893 kread(int nlx, void *addr, size_t size)
894 {
895         const char *sym;
896
897         if (namelist[nlx].n_type == 0 || namelist[nlx].n_value == 0) {
898                 sym = namelist[nlx].n_name;
899                 if (*sym == '_')
900                         ++sym;
901                 errx(1, "symbol %s not defined", sym);
902         }
903         if (kvm_read(kd, namelist[nlx].n_value, addr, size) != (ssize_t)size) {
904                 sym = namelist[nlx].n_name;
905                 if (*sym == '_')
906                         ++sym;
907                 errx(1, "%s: %s", sym, kvm_geterr(kd));
908         }
909 }
910
911 static void
912 usage(void)
913 {
914         fprintf(stderr, "%s%s",
915                 "usage: vmstat [-imsvz] [-c count] [-M core] [-N system] [-w wait]\n",
916                 "              [-n devs] [disks]\n");
917         exit(1);
918 }