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Do a better job formatting vmstat -i output:
[dragonfly.git] / usr.bin / vmstat / vmstat.c
blob8df89b899a75c43fa7bc43adf282b48bbd38a239
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 #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", 0, 0, 0, 0 },
74 #define X_NCHSTATS 1
75 { "_nchstats", 0, 0, 0, 0 },
76 #define X_KMEMSTATISTICS 2
77 { "_kmemstatistics", 0, 0, 0, 0 },
78 #define X_ZLIST 3
79 { "_zlist", 0, 0, 0, 0 },
80 #ifdef notyet
81 #define X_DEFICIT 4
82 { "_deficit", 0, 0, 0, 0 },
83 #define X_FORKSTAT 5
84 { "_forkstat", 0, 0, 0, 0 },
85 #define X_REC 6
86 { "_rectime", 0, 0, 0, 0 },
87 #define X_PGIN 7
88 { "_pgintime", 0, 0, 0, 0 },
89 #define X_XSTATS 8
90 { "_xstats", 0, 0, 0, 0 },
91 #define X_END 9
92 #else
93 #define X_END 4
94 #endif
95 { "", 0, 0, 0, 0 },
96 };
97
98 struct statinfo cur, last;
99 int num_devices, maxshowdevs;
100 long generation;
101 struct device_selection *dev_select;
102 int num_selected;
103 struct devstat_match *matches;
104 int num_matches = 0;
105 int num_devices_specified, num_selections;
106 long select_generation;
107 char **specified_devices;
108 devstat_select_mode select_mode;
109
110 struct vmmeter vmm, ovmm;
111 struct vmstats vms, ovms;
112
113 int winlines = 20;
114 int nflag = 0;
115 int verbose = 0;
116
117 kvm_t *kd;
118
119 struct kinfo_cputime cp_time, old_cp_time, diff_cp_time;
120
121 #define FORKSTAT 0x01
122 #define INTRSTAT 0x02
123 #define MEMSTAT 0x04
124 #define SUMSTAT 0x08
125 #define TIMESTAT 0x10
126 #define VMSTAT 0x20
127 #define ZMEMSTAT 0x40
128
129 static void cpustats(void);
130 static void dointr(void);
131 static void domem(void);
132 static void dosum(void);
133 static void dozmem(void);
134 static void dovmstat(u_int, int);
135 static void kread(int, void *, size_t);
136 static void usage(void);
137 static char **getdrivedata(char **);
138 static long getuptime(void);
139 static void needhdr(int);
140 static long pct(long, long);
141
142 #ifdef notyet
143 static void dotimes(void); /* Not implemented */
144 static void doforkst(void);
145 #endif
146 static void printhdr(void);
147 static void devstats(void);
148
149 int
150 main(int argc, char **argv)
151 {
152 int c, todo;
153 u_int interval;
154 int reps;
155 char *memf, *nlistf;
156 char errbuf[_POSIX2_LINE_MAX];
157
158 memf = nlistf = NULL;
159 interval = reps = todo = 0;
160 maxshowdevs = 2;
161 while ((c = getopt(argc, argv, "c:fiM:mN:n:p:stvw:z")) != -1) {
162 switch (c) {
163 case 'c':
164 reps = atoi(optarg);
165 break;
166 case 'f':
167 #ifdef notyet
168 todo |= FORKSTAT;
169 #else
170 errx(EX_USAGE, "sorry, -f is not (re)implemented yet");
171 #endif
172 break;
173 case 'i':
174 todo |= INTRSTAT;
175 break;
176 case 'M':
177 memf = optarg;
178 break;
179 case 'm':
180 todo |= MEMSTAT;
181 break;
182 case 'N':
183 nlistf = optarg;
184 break;
185 case 'n':
186 nflag = 1;
187 maxshowdevs = atoi(optarg);
188 if (maxshowdevs < 0)
189 errx(1, "number of devices %d is < 0",
190 maxshowdevs);
191 break;
192 case 'p':
193 if (buildmatch(optarg, &matches, &num_matches) != 0)
194 errx(1, "%s", devstat_errbuf);
195 break;
196 case 's':
197 todo |= SUMSTAT;
198 break;
199 case 't':
200 #ifdef notyet
201 todo |= TIMESTAT;
202 #else
203 errx(EX_USAGE, "sorry, -t is not (re)implemented yet");
204 #endif
205 break;
206 case 'v':
207 ++verbose;
208 break;
209 case 'w':
210 interval = atoi(optarg);
211 break;
212 case 'z':
213 todo |= ZMEMSTAT;
214 break;
215 default:
216 usage();
217 }
218 }
219 argc -= optind;
220 argv += optind;
221
222 if (todo == 0)
223 todo = VMSTAT;
224
225 /*
226 * Discard setgid privileges if not the running kernel so that bad
227 * guys can't print interesting stuff from kernel memory.
228 */
229 if (nlistf != NULL || memf != NULL)
230 setgid(getgid());
231
232 kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf);
233 if (kd == 0)
234 errx(1, "kvm_openfiles: %s", errbuf);
235
236 if ((c = kvm_nlist(kd, namelist)) != 0) {
237 if (c > 0) {
238 warnx("undefined symbols:");
239 for (c = 0; c < (int)__arysize(namelist); c++)
240 if (namelist[c].n_type == 0)
241 fprintf(stderr, " %s",
242 namelist[c].n_name);
243 fputc('\n', stderr);
244 } else
245 warnx("kvm_nlist: %s", kvm_geterr(kd));
246 exit(1);
247 }
248
249 if (todo & VMSTAT) {
250 struct winsize winsize;
251
252 /*
253 * Make sure that the userland devstat version matches the
254 * kernel devstat version. If not, exit and print a
255 * message informing the user of his mistake.
256 */
257 if (checkversion() < 0)
258 errx(1, "%s", devstat_errbuf);
259
260
261 argv = getdrivedata(argv);
262 winsize.ws_row = 0;
263 ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&winsize);
264 if (winsize.ws_row > 0)
265 winlines = winsize.ws_row;
266
267 }
268
269 #define BACKWARD_COMPATIBILITY
270 #ifdef BACKWARD_COMPATIBILITY
271 if (*argv) {
272 interval = atoi(*argv);
273 if (*++argv)
274 reps = atoi(*argv);
275 }
276 #endif
277
278 if (interval) {
279 if (!reps)
280 reps = -1;
281 } else if (reps)
282 interval = 1;
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 time_t uptime, halfuptime;
392 struct devinfo *tmp_dinfo;
393 int vmm_size = sizeof(vmm);
394 int vms_size = sizeof(vms);
395 int vmt_size = sizeof(total);
396
397 uptime = getuptime();
398 halfuptime = uptime / 2;
399 signal(SIGCONT, needhdr);
400
401 for (hdrcnt = 1;;) {
402 if (!--hdrcnt)
403 printhdr();
404 if (kinfo_get_sched_cputime(&cp_time))
405 err(1, "kinfo_get_sched_cputime");
406
407 tmp_dinfo = last.dinfo;
408 last.dinfo = cur.dinfo;
409 cur.dinfo = tmp_dinfo;
410 last.busy_time = cur.busy_time;
411
412 /*
413 * Here what we want to do is refresh our device stats.
414 * getdevs() returns 1 when the device list has changed.
415 * If the device list has changed, we want to go through
416 * the selection process again, in case a device that we
417 * were previously displaying has gone away.
418 */
419 switch (getdevs(&cur)) {
420 case -1:
421 errx(1, "%s", devstat_errbuf);
422 break;
423 case 1: {
424 int retval;
425
426 num_devices = cur.dinfo->numdevs;
427 generation = cur.dinfo->generation;
428
429 retval = selectdevs(&dev_select, &num_selected,
430 &num_selections, &select_generation,
431 generation, cur.dinfo->devices,
432 num_devices, matches, num_matches,
433 specified_devices,
434 num_devices_specified, select_mode,
435 maxshowdevs, 0);
436 switch (retval) {
437 case -1:
438 errx(1, "%s", devstat_errbuf);
439 break;
440 case 1:
441 printhdr();
442 break;
443 default:
444 break;
445 }
446 }
447 default:
448 break;
449 }
450
451 if (sysctlbyname("vm.vmstats", &vms, &vms_size, NULL, 0)) {
452 perror("sysctlbyname: vm.vmstats");
453 exit(1);
454 }
455 if (sysctlbyname("vm.vmmeter", &vmm, &vmm_size, NULL, 0)) {
456 perror("sysctlbyname: vm.vmmeter");
457 exit(1);
458 }
459 if (sysctlbyname("vm.vmtotal", &total, &vmt_size, NULL, 0)) {
460 perror("sysctlbyname: vm.vmtotal");
461 exit(1);
462 }
463 printf("%2d %1d %1d",
464 total.t_rq - 1, total.t_dw + total.t_pw, total.t_sw);
465 #define vmstat_pgtok(a) ((a) * vms.v_page_size >> 10)
466 #define rate(x) (((x) + halfuptime) / uptime) /* round */
467 printf(" %7ld %6ld ",
468 (long)vmstat_pgtok(total.t_avm), (long)vmstat_pgtok(total.t_free));
469 printf("%4lu ",
470 (u_long)rate(vmm.v_vm_faults - ovmm.v_vm_faults));
471 printf("%3lu ",
472 (u_long)rate(vmm.v_reactivated - ovmm.v_reactivated));
473 printf("%3lu ",
474 (u_long)rate(vmm.v_swapin + vmm.v_vnodein -
475 (ovmm.v_swapin + ovmm.v_vnodein)));
476 printf("%3lu ",
477 (u_long)rate(vmm.v_swapout + vmm.v_vnodeout -
478 (ovmm.v_swapout + ovmm.v_vnodeout)));
479 printf("%3lu ",
480 (u_long)rate(vmm.v_tfree - ovmm.v_tfree));
481 printf("%3lu ",
482 (u_long)rate(vmm.v_pdpages - ovmm.v_pdpages));
483 devstats();
484 printf("%4lu %4lu %3lu ",
485 (u_long)rate(vmm.v_intr - ovmm.v_intr),
486 (u_long)rate(vmm.v_syscall - ovmm.v_syscall),
487 (u_long)rate(vmm.v_swtch - ovmm.v_swtch));
488 cpustats();
489 printf("\n");
490 fflush(stdout);
491 if (reps >= 0 && --reps <= 0)
492 break;
493 ovmm = vmm;
494 uptime = interval;
495 /*
496 * We round upward to avoid losing low-frequency events
497 * (i.e., >= 1 per interval but < 1 per second).
498 */
499 if (interval != 1)
500 halfuptime = (uptime + 1) / 2;
501 else
502 halfuptime = 0;
503 sleep(interval);
504 }
505 }
506
507 static void
508 printhdr(void)
509 {
510 int i, num_shown;
511
512 num_shown = (num_selected < maxshowdevs) ? num_selected : maxshowdevs;
513 printf(" procs memory page%*s", 19, "");
514 if (num_shown > 1)
515 printf(" disks %*s", num_shown * 4 - 7, "");
516 else if (num_shown == 1)
517 printf("disk");
518 printf(" faults cpu\n");
519 printf(" r b w avm fre flt re pi po fr sr ");
520 for (i = 0; i < num_devices; i++)
521 if ((dev_select[i].selected)
522 && (dev_select[i].selected <= maxshowdevs))
523 printf("%c%c%d ", dev_select[i].device_name[0],
524 dev_select[i].device_name[1],
525 dev_select[i].unit_number);
526 printf(" in sy cs us sy id\n");
527 hdrcnt = winlines - 2;
528 }
529
530 /*
531 * Force a header to be prepended to the next output.
532 */
533 static void
534 needhdr(__unused int signo)
535 {
536
537 hdrcnt = 1;
538 }
539
540 static long
541 pct(long top, long bot)
542 {
543 long ans;
544
545 if (bot == 0)
546 return(0);
547 ans = (quad_t)top * 100 / bot;
548 return (ans);
549 }
550
551 #define PCT(top, bot) pct((long)(top), (long)(bot))
552
553 static void
554 dosum(void)
555 {
556 struct nchstats *nch_tmp, nchstats;
557 int vms_size = sizeof(vms);
558 int vmm_size = sizeof(vmm);
559 int cpucnt;
560 u_long nchtotal;
561 size_t nch_size = sizeof(struct nchstats) * SMP_MAXCPU;
562
563 if (sysctlbyname("vm.vmstats", &vms, &vms_size, NULL, 0)) {
564 perror("sysctlbyname: vm.vmstats");
565 exit(1);
566 }
567 if (sysctlbyname("vm.vmmeter", &vmm, &vmm_size, NULL, 0)) {
568 perror("sysctlbyname: vm.vmstats");
569 exit(1);
570 }
571 printf("%9u cpu context switches\n", vmm.v_swtch);
572 printf("%9u device interrupts\n", vmm.v_intr);
573 printf("%9u software interrupts\n", vmm.v_soft);
574 printf("%9u traps\n", vmm.v_trap);
575 printf("%9u system calls\n", vmm.v_syscall);
576 printf("%9u kernel threads created\n", vmm.v_kthreads);
577 printf("%9u fork() calls\n", vmm.v_forks);
578 printf("%9u vfork() calls\n", vmm.v_vforks);
579 printf("%9u rfork() calls\n", vmm.v_rforks);
580 printf("%9u exec() calls\n", vmm.v_exec);
581 printf("%9u swap pager pageins\n", vmm.v_swapin);
582 printf("%9u swap pager pages paged in\n", vmm.v_swappgsin);
583 printf("%9u swap pager pageouts\n", vmm.v_swapout);
584 printf("%9u swap pager pages paged out\n", vmm.v_swappgsout);
585 printf("%9u vnode pager pageins\n", vmm.v_vnodein);
586 printf("%9u vnode pager pages paged in\n", vmm.v_vnodepgsin);
587 printf("%9u vnode pager pageouts\n", vmm.v_vnodeout);
588 printf("%9u vnode pager pages paged out\n", vmm.v_vnodepgsout);
589 printf("%9u page daemon wakeups\n", vmm.v_pdwakeups);
590 printf("%9u pages examined by the page daemon\n", vmm.v_pdpages);
591 printf("%9u pages reactivated\n", vmm.v_reactivated);
592 printf("%9u copy-on-write faults\n", vmm.v_cow_faults);
593 printf("%9u copy-on-write optimized faults\n", vmm.v_cow_optim);
594 printf("%9u zero fill pages zeroed\n", vmm.v_zfod);
595 printf("%9u zero fill pages prezeroed\n", vmm.v_ozfod);
596 printf("%9u intransit blocking page faults\n", vmm.v_intrans);
597 printf("%9u total VM faults taken\n", vmm.v_vm_faults);
598 printf("%9u pages affected by kernel thread creation\n", vmm.v_kthreadpages);
599 printf("%9u pages affected by fork()\n", vmm.v_forkpages);
600 printf("%9u pages affected by vfork()\n", vmm.v_vforkpages);
601 printf("%9u pages affected by rfork()\n", vmm.v_rforkpages);
602 printf("%9u pages freed\n", vmm.v_tfree);
603 printf("%9u pages freed by daemon\n", vmm.v_dfree);
604 printf("%9u pages freed by exiting processes\n", vmm.v_pfree);
605 printf("%9u pages active\n", vms.v_active_count);
606 printf("%9u pages inactive\n", vms.v_inactive_count);
607 printf("%9u pages in VM cache\n", vms.v_cache_count);
608 printf("%9u pages wired down\n", vms.v_wire_count);
609 printf("%9u pages free\n", vms.v_free_count);
610 printf("%9u bytes per page\n", vms.v_page_size);
611
612 if ((nch_tmp = malloc(nch_size)) == NULL) {
613 perror("malloc");
614 exit(1);
615 } else {
616 if (sysctlbyname("vfs.cache.nchstats", nch_tmp, &nch_size, NULL, 0)) {
617 perror("sysctlbyname vfs.cache.nchstats");
618 free(nch_tmp);
619 exit(1);
620 } else {
621 if ((nch_tmp = realloc(nch_tmp, nch_size)) == NULL) {
622 perror("realloc");
623 exit(1);
624 }
625 }
626 }
627
628 cpucnt = nch_size / sizeof(struct nchstats);
629 kvm_nch_cpuagg(nch_tmp, &nchstats, cpucnt);
630
631 nchtotal = nchstats.ncs_goodhits + nchstats.ncs_neghits +
632 nchstats.ncs_badhits + nchstats.ncs_falsehits +
633 nchstats.ncs_miss + nchstats.ncs_long;
634 printf("%9ld total name lookups\n", nchtotal);
635 printf(
636 "%9s cache hits (%ld%% pos + %ld%% neg) system %ld%% per-directory\n",
637 "", PCT(nchstats.ncs_goodhits, nchtotal),
638 PCT(nchstats.ncs_neghits, nchtotal),
639 PCT(nchstats.ncs_pass2, nchtotal));
640 printf("%9s deletions %ld%%, falsehits %ld%%, toolong %ld%%\n", "",
641 PCT(nchstats.ncs_badhits, nchtotal),
642 PCT(nchstats.ncs_falsehits, nchtotal),
643 PCT(nchstats.ncs_long, nchtotal));
644 free(nch_tmp);
645 }
646
647 #ifdef notyet
648 void
649 doforkst(void)
650 {
651 struct forkstat fks;
652
653 kread(X_FORKSTAT, &fks, sizeof(struct forkstat));
654 printf("%d forks, %d pages, average %.2f\n",
655 fks.cntfork, fks.sizfork, (double)fks.sizfork / fks.cntfork);
656 printf("%d vforks, %d pages, average %.2f\n",
657 fks.cntvfork, fks.sizvfork, (double)fks.sizvfork / fks.cntvfork);
658 }
659 #endif
660
661 static void
662 devstats(void)
663 {
664 int dn;
665 long double transfers_per_second;
666 long double busy_seconds;
667
668 diff_cp_time.cp_user = cp_time.cp_user - old_cp_time.cp_user;
669 diff_cp_time.cp_nice = cp_time.cp_nice - old_cp_time.cp_nice;
670 diff_cp_time.cp_sys = cp_time.cp_sys - old_cp_time.cp_sys;
671 diff_cp_time.cp_intr = cp_time.cp_intr - old_cp_time.cp_intr;
672 diff_cp_time.cp_idle = cp_time.cp_idle - old_cp_time.cp_idle;
673 old_cp_time = cp_time;
674
675 busy_seconds = compute_etime(cur.busy_time, last.busy_time);
676
677 for (dn = 0; dn < num_devices; dn++) {
678 int di;
679
680 if ((dev_select[dn].selected == 0)
681 || (dev_select[dn].selected > maxshowdevs))
682 continue;
683
684 di = dev_select[dn].position;
685
686 if (compute_stats(&cur.dinfo->devices[di],
687 &last.dinfo->devices[di], busy_seconds,
688 NULL, NULL, NULL,
689 NULL, &transfers_per_second, NULL,
690 NULL, NULL) != 0)
691 errx(1, "%s", devstat_errbuf);
692
693 printf("%3.0Lf ", transfers_per_second);
694 }
695 }
696
697 static void
698 cpustats(void)
699 {
700 uint64_t total;
701 double totusage;
702
703 total = diff_cp_time.cp_user + diff_cp_time.cp_nice +
704 diff_cp_time.cp_sys + diff_cp_time.cp_intr + diff_cp_time.cp_idle;
705
706 if (total)
707 totusage = 100.0 / total;
708 else
709 totusage = 0;
710 printf("%2.0f ",
711 (diff_cp_time.cp_user + diff_cp_time.cp_nice) * totusage);
712 printf("%2.0f ",
713 (diff_cp_time.cp_sys + diff_cp_time.cp_intr) * totusage);
714 printf("%2.0f",
715 diff_cp_time.cp_idle * totusage);
716 }
717
718 static void
719 dointr(void)
720 {
721 u_long *intrcnt, uptime;
722 u_int64_t inttotal;
723 size_t nintr, inamlen, i, size;
724 int nwidth;
725 char *intrstr;
726 char **intrname;
727
728 uptime = getuptime();
729 if (sysctlbyname("hw.intrnames", NULL, &inamlen, NULL, 0) != 0)
730 errx(1, "sysctlbyname");
731 intrstr = malloc(inamlen);
732 if (intrstr == NULL)
733 err(1, "malloc");
734 sysctlbyname("hw.intrnames", intrstr, &inamlen, NULL, 0);
735 for (nintr = 0, i = 0; i < inamlen; ++i) {
736 if (intrstr[i] == 0)
737 nintr++;
738 }
739 intrname = malloc(nintr * sizeof(char *));
740 for (i = 0; i < nintr; ++i) {
741 intrname[i] = intrstr;
742 intrstr += strlen(intrstr) + 1;
743 }
744
745 size = nintr * sizeof(*intrcnt);
746 intrcnt = calloc(nintr, sizeof(*intrcnt));
747 if (intrcnt == NULL)
748 err(1, "malloc");
749 sysctlbyname("hw.intrcnt", intrcnt, &size, NULL, 0);
750
751 nwidth = 21;
752 for (i = 0; i < nintr; ++i) {
753 if (nwidth < (int)strlen(intrname[i]))
754 nwidth = (int)strlen(intrname[i]);
755 }
756 if (verbose) nwidth += 8;
757
758 printf("%-*.*s %11s %10s\n",
759 nwidth, nwidth, "interrupt", "total", "rate");
760 inttotal = 0;
761 for (i = 0; i < nintr; ++i) {
762 int named;
763 char *infop, irqinfo[72];
764
765 if ((named = strncmp(intrname[i], "irq", 3)) != 0 ||
766 intrcnt[i] > 0) {
767 infop = intrname[i];
768 if (verbose && named) {
769 snprintf(irqinfo, sizeof(irqinfo),
770 "irq%d: %s", i, intrname[i]);
771 infop = irqinfo;
772 }
773 printf("%-*.*s %11lu %10lu\n",
774 nwidth, nwidth, infop,
775 intrcnt[i], intrcnt[i] / uptime);
776 }
777 inttotal += intrcnt[i];
778 }
779 printf("%-*.*s %11llu %10llu\n",
780 nwidth, nwidth, "Total",
781 inttotal, inttotal / (u_int64_t) uptime);
782 }
783
784 #define MAX_KMSTATS 200
785
786 static long
787 cpuagg(long *ary)
788 {
789 int i;
790 long ttl;
791
792 for (i = ttl = 0; i < SMP_MAXCPU; ++i)
793 ttl += ary[i];
794 return(ttl);
795 }
796
797 static void
798 domem(void)
799 {
800 struct malloc_type *ks;
801 int i, j;
802 int first, nkms;
803 long totuse = 0, totfree = 0, totreq = 0;
804 struct malloc_type kmemstats[MAX_KMSTATS], *kmsp;
805 char buf[1024];
806
807 kread(X_KMEMSTATISTICS, &kmsp, sizeof(kmsp));
808 for (nkms = 0; nkms < MAX_KMSTATS && kmsp != NULL; nkms++) {
809 if (sizeof(kmemstats[0]) != kvm_read(kd, (u_long)kmsp,
810 &kmemstats[nkms], sizeof(kmemstats[0])))
811 err(1, "kvm_read(%p)", (void *)kmsp);
812 if (sizeof(buf) != kvm_read(kd,
813 (u_long)kmemstats[nkms].ks_shortdesc, buf, sizeof(buf)))
814 err(1, "kvm_read(%p)",
815 kmemstats[nkms].ks_shortdesc);
816 buf[sizeof(buf) - 1] = '\0';
817 kmemstats[nkms].ks_shortdesc = strdup(buf);
818 kmsp = kmemstats[nkms].ks_next;
819 }
820 if (kmsp != NULL)
821 warnx("truncated to the first %d memory types", nkms);
822
823 printf(
824 "\nMemory statistics by type Type Kern\n");
825 printf(
826 " Type InUse MemUse HighUse Limit Requests Limit Limit Size(s)\n");
827 for (i = 0, ks = &kmemstats[0]; i < nkms; i++, ks++) {
828 if (ks->ks_calls == 0)
829 continue;
830 printf("%13s%6ld%6ldK%7ldK%7ldK%9lld%5u%6u",
831 ks->ks_shortdesc,
832 cpuagg(ks->ks_inuse), (cpuagg(ks->ks_memuse) + 1023) / 1024,
833 (ks->ks_maxused + 1023) / 1024,
834 (ks->ks_limit + 1023) / 1024, ks->ks_calls,
835 ks->ks_limblocks, ks->ks_mapblocks);
836 first = 1;
837 for (j = 1 << MINBUCKET; j < 1 << (MINBUCKET + 16); j <<= 1) {
838 if ((ks->ks_size & j) == 0)
839 continue;
840 if (first)
841 printf(" ");
842 else
843 printf(",");
844 if(j<1024)
845 printf("%d",j);
846 else
847 printf("%dK",j>>10);
848 first = 0;
849 }
850 printf("\n");
851 totuse += cpuagg(ks->ks_memuse);
852 totreq += ks->ks_calls;
853 }
854 printf("\nMemory Totals: In Use Free Requests\n");
855 printf(" %7ldK %6ldK %8ld\n",
856 (totuse + 1023) / 1024, (totfree + 1023) / 1024, totreq);
857 }
858
859 static void
860 dozmem(void)
861 {
862 char *buf;
863 size_t bufsize;
864
865 buf = NULL;
866 bufsize = 1024;
867 for (;;) {
868 if ((buf = realloc(buf, bufsize)) == NULL)
869 err(1, "realloc()");
870 if (sysctlbyname("vm.zone", buf, &bufsize, NULL, 0) == 0)
871 break;
872 if (errno != ENOMEM)
873 err(1, "sysctl()");
874 bufsize *= 2;
875 }
876 buf[bufsize] = '\0'; /* play it safe */
877 printf("%s\n\n", buf);
878 free(buf);
879 }
880
881 /*
882 * kread reads something from the kernel, given its nlist index.
883 */
884 static void
885 kread(int nlx, void *addr, size_t size)
886 {
887 const char *sym;
888
889 if (namelist[nlx].n_type == 0 || namelist[nlx].n_value == 0) {
890 sym = namelist[nlx].n_name;
891 if (*sym == '_')
892 ++sym;
893 errx(1, "symbol %s not defined", sym);
894 }
895 if (kvm_read(kd, namelist[nlx].n_value, addr, size) != (ssize_t)size) {
896 sym = namelist[nlx].n_name;
897 if (*sym == '_')
898 ++sym;
899 errx(1, "%s: %s", sym, kvm_geterr(kd));
900 }
901 }
902
903 static void
904 usage(void)
905 {
906 fprintf(stderr, "%s%s",
907 "usage: vmstat [-imsvz] [-c count] [-M core] [-N system] [-w wait]\n",
908 " [-n devs] [disks]\n");
909 exit(1);
910 }
DragonFly BSD