2 * Copyright (c) 1983, 1989, 1992, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
33 * @(#)vmstat.c 8.2 (Berkeley) 1/12/94
34 * $FreeBSD: src/usr.bin/systat/vmstat.c,v 1.38.2.4 2002/03/12 19:50:23 phantom Exp $
35 * $DragonFly: src/usr.bin/systat/vmstat.c,v 1.8 2004/12/22 11:01:49 joerg Exp $
39 * Cursed vmstat -- from Robert Elz.
42 #define _KERNEL_STRUCTURES
43 #include <sys/param.h>
48 #include <sys/namei.h>
49 #include <sys/sysctl.h>
50 #include <sys/vmmeter.h>
52 #include <vm/vm_param.h>
74 struct kinfo_cputime cp_time;
78 struct nchstats nchstats;
88 struct kinfo_cputime cp_time, old_cp_time;
89 struct statinfo cur, last, run;
96 #define nchtotal s.nchstats
97 #define oldnchtotal s1.nchstats
99 static enum state { BOOT, TIME, RUN } state = TIME;
101 static void allocinfo(struct Info *);
102 static void copyinfo(struct Info *, struct Info *);
103 static void dinfo(int, int, struct statinfo *, struct statinfo *);
104 static void getinfo(struct Info *, enum state);
105 static void putint(int, int, int, int);
106 static void putfloat(double, int, int, int, int, int);
107 static void putlongdouble(long double, int, int, int, int, int);
108 static int ucount(void);
116 static long *intrloc;
117 static char **intrname;
118 static int nextintsrow;
119 static int extended_vm_stats;
128 ut = open(_PATH_UTMP, O_RDONLY);
146 static struct nlist namelist[] = {
147 #define X_BUFFERSPACE 0
151 #define X_INTRNAMES 2
153 #define X_EINTRNAMES 3
159 #define X_DESIREDVNODES 6
160 { "_desiredvnodes" },
161 #define X_NUMVNODES 7
163 #define X_FREEVNODES 8
165 #define X_NUMDIRTYBUFFERS 9
166 { "_numdirtybuffers" },
171 * These constants define where the major pieces are laid out
173 #define STATROW 0 /* uses 1 row and 68 cols */
175 #define MEMROW 2 /* uses 4 rows and 31 cols */
177 #define PAGEROW 2 /* uses 4 rows and 26 cols */
179 #define INTSROW 6 /* uses all rows to bottom and 17 cols */
181 #define PROCSROW 7 /* uses 2 rows and 20 cols */
183 #define GENSTATROW 7 /* uses 2 rows and 30 cols */
184 #define GENSTATCOL 20
185 #define VMSTATROW 6 /* uses 17 rows and 12 cols */
187 #define GRAPHROW 10 /* uses 3 rows and 51 cols */
189 #define NAMEIROW 14 /* uses 3 rows and 38 cols */
191 #define DISKROW 18 /* uses 5 rows and 50 cols (for 9 drives) */
194 #define DRIVESPACE 7 /* max # for space */
196 #define MAXDRIVES DRIVESPACE /* max # to display */
201 char *intrnamebuf, *cp;
204 if (namelist[0].n_type == 0) {
205 if (kvm_nlist(kd, namelist)) {
209 if (namelist[0].n_type == 0) {
210 error("No namelist");
215 if ((num_devices = getnumdevs()) < 0) {
216 warnx("%s", devstat_errbuf);
220 cur.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
221 last.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
222 run.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
223 bzero(cur.dinfo, sizeof(struct devinfo));
224 bzero(last.dinfo, sizeof(struct devinfo));
225 bzero(run.dinfo, sizeof(struct devinfo));
227 if (dsinit(MAXDRIVES, &cur, &last, &run) != 1)
231 nintr = (namelist[X_EINTRCNT].n_value -
232 namelist[X_INTRCNT].n_value) / sizeof (long);
233 intrloc = calloc(nintr, sizeof (long));
234 intrname = calloc(nintr, sizeof (long));
235 intrnamebuf = malloc(namelist[X_EINTRNAMES].n_value -
236 namelist[X_INTRNAMES].n_value);
237 if (intrnamebuf == 0 || intrname == 0 || intrloc == 0) {
238 error("Out of memory\n");
248 NREAD(X_INTRNAMES, intrnamebuf, NVAL(X_EINTRNAMES) -
250 for (cp = intrnamebuf, i = 0; i < nintr; i++) {
252 cp += strlen(cp) + 1;
254 nextintsrow = INTSROW + 2;
270 static int d_first = -1;
273 d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
276 tp = localtime(&now);
277 (void) strftime(buf, sizeof(buf),
278 d_first ? "%e %b %R" : "%b %e %R", tp);
288 mvprintw(STATROW, STATCOL + 4, "users Load");
289 mvprintw(MEMROW, MEMCOL, "Mem:KB REAL VIRTUAL");
290 mvprintw(MEMROW + 1, MEMCOL, " Tot Share Tot Share");
291 mvprintw(MEMROW + 2, MEMCOL, "Act");
292 mvprintw(MEMROW + 3, MEMCOL, "All");
294 mvprintw(MEMROW + 1, MEMCOL + 41, "Free");
296 mvprintw(PAGEROW, PAGECOL, " VN PAGER SWAP PAGER ");
297 mvprintw(PAGEROW + 1, PAGECOL, " in out in out ");
298 mvprintw(PAGEROW + 2, PAGECOL, "count");
299 mvprintw(PAGEROW + 3, PAGECOL, "pages");
301 mvprintw(INTSROW, INTSCOL + 3, " Interrupts");
302 mvprintw(INTSROW + 1, INTSCOL + 9, "total");
304 mvprintw(VMSTATROW + 1, VMSTATCOL + 10, "cow");
305 mvprintw(VMSTATROW + 2, VMSTATCOL + 10, "wire");
306 mvprintw(VMSTATROW + 3, VMSTATCOL + 10, "act");
307 mvprintw(VMSTATROW + 4, VMSTATCOL + 10, "inact");
308 mvprintw(VMSTATROW + 5, VMSTATCOL + 10, "cache");
309 mvprintw(VMSTATROW + 6, VMSTATCOL + 10, "free");
310 mvprintw(VMSTATROW + 7, VMSTATCOL + 10, "daefr");
311 mvprintw(VMSTATROW + 8, VMSTATCOL + 10, "prcfr");
312 mvprintw(VMSTATROW + 9, VMSTATCOL + 10, "react");
313 mvprintw(VMSTATROW + 10, VMSTATCOL + 10, "pdwake");
314 mvprintw(VMSTATROW + 11, VMSTATCOL + 10, "pdpgs");
315 mvprintw(VMSTATROW + 12, VMSTATCOL + 10, "intrn");
316 mvprintw(VMSTATROW + 13, VMSTATCOL + 10, "buf");
317 mvprintw(VMSTATROW + 14, VMSTATCOL + 10, "dirtybuf");
319 mvprintw(VMSTATROW + 15, VMSTATCOL + 10, "desiredvnodes");
320 mvprintw(VMSTATROW + 16, VMSTATCOL + 10, "numvnodes");
321 mvprintw(VMSTATROW + 17, VMSTATCOL + 10, "freevnodes");
323 mvprintw(GENSTATROW, GENSTATCOL, " Csw Trp Sys Int Sof Flt");
325 mvprintw(GRAPHROW, GRAPHCOL,
326 " . %%Sys . %%Intr . %%User . %%Nice . %%Idle");
327 mvprintw(PROCSROW, PROCSCOL, "Proc:r p d s w");
328 mvprintw(GRAPHROW + 1, GRAPHCOL,
329 "| | | | | | | | | | |");
331 mvprintw(NAMEIROW, NAMEICOL, "Namei Name-cache Dir-cache");
332 mvprintw(NAMEIROW + 1, NAMEICOL,
333 " Calls hits %% hits %%");
334 mvprintw(DISKROW, DISKCOL, "Disks");
335 mvprintw(DISKROW + 1, DISKCOL, "KB/t");
336 mvprintw(DISKROW + 2, DISKCOL, "tps");
337 mvprintw(DISKROW + 3, DISKCOL, "MB/s");
338 mvprintw(DISKROW + 4, DISKCOL, "%% busy");
340 * For now, we don't support a fourth disk statistic. So there's
341 * no point in providing a label for it. If someone can think of a
342 * fourth useful disk statistic, there is room to add it.
344 /* mvprintw(DISKROW + 4, DISKCOL, " msps"); */
346 for (i = 0; i < num_devices && j < MAXDRIVES; i++)
347 if (dev_select[i].selected) {
349 sprintf(tmpstr, "%s%d", dev_select[i].device_name,
350 dev_select[i].unit_number);
351 mvprintw(DISKROW, DISKCOL + 5 + 6 * j,
358 * room for extended VM stats
360 mvprintw(VMSTATROW + 11, VMSTATCOL - 6, "zfod");
361 mvprintw(VMSTATROW + 12, VMSTATCOL - 6, "ofod");
362 mvprintw(VMSTATROW + 13, VMSTATCOL - 6, "%%slo-z");
363 mvprintw(VMSTATROW + 14, VMSTATCOL - 6, "tfree");
364 extended_vm_stats = 1;
366 extended_vm_stats = 0;
367 mvprintw(VMSTATROW + 0, VMSTATCOL + 10, "zfod");
370 for (i = 0; i < nintr; i++) {
373 mvprintw(intrloc[i], INTSCOL + 9, "%-10.10s", intrname[i]);
377 #define CP_UPDATE(fld) do { \
389 #define X(fld) {t=s.fld[i]; s.fld[i]-=s1.fld[i]; if(state==TIME) s1.fld[i]=t;}
390 #define Y(fld) {t = s.fld; s.fld -= s1.fld; if(state == TIME) s1.fld = t;}
391 #define Z(fld) {t = s.nchstats.fld; s.nchstats.fld -= s1.nchstats.fld; \
392 if(state == TIME) s1.nchstats.fld = t;}
393 #define PUTRATE(fld, l, c, w) \
395 putint((int)((float)s.fld/etime + 0.5), l, c, w)
399 static const char cpuchar[5] = { '=' , '+', '>', '-', ' ' };
401 static const size_t cpuoffsets[] = {
402 offsetof(struct kinfo_cputime, cp_sys),
403 offsetof(struct kinfo_cputime, cp_intr),
404 offsetof(struct kinfo_cputime, cp_user),
405 offsetof(struct kinfo_cputime, cp_nice),
406 offsetof(struct kinfo_cputime, cp_idle)
415 static int failcnt = 0;
419 CP_UPDATE(cp_time.cp_user);
420 CP_UPDATE(cp_time.cp_nice);
421 CP_UPDATE(cp_time.cp_sys);
422 CP_UPDATE(cp_time.cp_intr);
423 CP_UPDATE(cp_time.cp_idle);
426 if (total_time == 0.0)
429 if (etime < 100000.0) { /* < 100ms ignore this trash */
430 if (failcnt++ >= MAXFAIL) {
432 mvprintw(2, 10, "The alternate system clock has died!");
433 mvprintw(3, 10, "Reverting to ``pigs'' display.");
448 for (i = 0; i < nintr; i++) {
449 if (s.intrcnt[i] == 0)
451 if (intrloc[i] == 0) {
452 if (nextintsrow == LINES)
454 intrloc[i] = nextintsrow++;
455 mvprintw(intrloc[i], INTSCOL + 9, "%-10.10s",
459 l = (int)((float)s.intrcnt[i]/etime + 0.5);
461 putint(l, intrloc[i], INTSCOL + 2, 6);
463 putint(inttotal, INTSROW + 1, INTSCOL + 2, 6);
464 Z(ncs_goodhits); Z(ncs_badhits); Z(ncs_miss);
465 Z(ncs_long); Z(ncs_pass2); Z(ncs_2passes); Z(ncs_neghits);
466 s.nchcount = nchtotal.ncs_goodhits + nchtotal.ncs_badhits +
467 nchtotal.ncs_miss + nchtotal.ncs_long + nchtotal.ncs_neghits;
469 s1.nchcount = s.nchcount;
473 for (c = 0; c < CPUSTATES; c++) {
474 uint64_t val = *(uint64_t *)(((uint8_t *)&s.cp_time) +
476 f1 = 100.0 * val / total_time;
478 l = (int) ((f2 + 1.0) / 2.0) - psiz;
480 f1 = 99.9; /* no room to display 100.0 */
481 putfloat(f1, GRAPHROW, GRAPHCOL + 10 * c, 4, 1, 0);
482 move(GRAPHROW + 2, psiz);
488 putint(ucount(), STATROW, STATCOL, 3);
489 putfloat(avenrun[0], STATROW, STATCOL + 17, 6, 2, 0);
490 putfloat(avenrun[1], STATROW, STATCOL + 23, 6, 2, 0);
491 putfloat(avenrun[2], STATROW, STATCOL + 29, 6, 2, 0);
492 mvaddstr(STATROW, STATCOL + 53, buf);
493 #define pgtokb(pg) ((pg) * vms.v_page_size / 1024)
494 putint(pgtokb(total.t_arm), MEMROW + 2, MEMCOL + 3, 8);
495 putint(pgtokb(total.t_armshr), MEMROW + 2, MEMCOL + 11, 8);
496 putint(pgtokb(total.t_avm), MEMROW + 2, MEMCOL + 19, 9);
497 putint(pgtokb(total.t_avmshr), MEMROW + 2, MEMCOL + 28, 9);
498 putint(pgtokb(total.t_rm), MEMROW + 3, MEMCOL + 3, 8);
499 putint(pgtokb(total.t_rmshr), MEMROW + 3, MEMCOL + 11, 8);
500 putint(pgtokb(total.t_vm), MEMROW + 3, MEMCOL + 19, 9);
501 putint(pgtokb(total.t_vmshr), MEMROW + 3, MEMCOL + 28, 9);
502 putint(pgtokb(total.t_free), MEMROW + 2, MEMCOL + 37, 8);
503 putint(total.t_rq - 1, PROCSROW + 1, PROCSCOL + 3, 3);
504 putint(total.t_pw, PROCSROW + 1, PROCSCOL + 6, 3);
505 putint(total.t_dw, PROCSROW + 1, PROCSCOL + 9, 3);
506 putint(total.t_sl, PROCSROW + 1, PROCSCOL + 12, 3);
507 putint(total.t_sw, PROCSROW + 1, PROCSCOL + 15, 3);
508 if (extended_vm_stats == 0) {
509 PUTRATE(Vmm.v_zfod, VMSTATROW + 0, VMSTATCOL + 4, 5);
511 PUTRATE(Vmm.v_cow_faults, VMSTATROW + 1, VMSTATCOL + 3, 6);
512 putint(pgtokb(vms.v_wire_count), VMSTATROW + 2, VMSTATCOL, 9);
513 putint(pgtokb(vms.v_active_count), VMSTATROW + 3, VMSTATCOL, 9);
514 putint(pgtokb(vms.v_inactive_count), VMSTATROW + 4, VMSTATCOL, 9);
515 putint(pgtokb(vms.v_cache_count), VMSTATROW + 5, VMSTATCOL, 9);
516 putint(pgtokb(vms.v_free_count), VMSTATROW + 6, VMSTATCOL, 9);
517 PUTRATE(Vmm.v_dfree, VMSTATROW + 7, VMSTATCOL, 9);
518 PUTRATE(Vmm.v_pfree, VMSTATROW + 8, VMSTATCOL, 9);
519 PUTRATE(Vmm.v_reactivated, VMSTATROW + 9, VMSTATCOL, 9);
520 PUTRATE(Vmm.v_pdwakeups, VMSTATROW + 10, VMSTATCOL, 9);
521 PUTRATE(Vmm.v_pdpages, VMSTATROW + 11, VMSTATCOL, 9);
522 PUTRATE(Vmm.v_intrans, VMSTATROW + 12, VMSTATCOL, 9);
524 if (extended_vm_stats) {
525 PUTRATE(Vmm.v_zfod, VMSTATROW + 11, VMSTATCOL - 16, 9);
526 PUTRATE(Vmm.v_ozfod, VMSTATROW + 12, VMSTATCOL - 16, 9);
528 ((s.Vmm.v_ozfod < s.Vmm.v_zfod) ?
529 s.Vmm.v_ozfod * 100 / s.Vmm.v_zfod :
536 PUTRATE(Vmm.v_tfree, VMSTATROW + 14, VMSTATCOL - 16, 9);
539 putint(s.bufspace/1024, VMSTATROW + 13, VMSTATCOL, 9);
540 putint(s.numdirtybuffers, VMSTATROW + 14, VMSTATCOL, 9);
541 putint(s.desiredvnodes, VMSTATROW + 15, VMSTATCOL, 9);
542 putint(s.numvnodes, VMSTATROW + 16, VMSTATCOL, 9);
543 putint(s.freevnodes, VMSTATROW + 17, VMSTATCOL, 9);
544 PUTRATE(Vmm.v_vnodein, PAGEROW + 2, PAGECOL + 5, 5);
545 PUTRATE(Vmm.v_vnodeout, PAGEROW + 2, PAGECOL + 10, 5);
546 PUTRATE(Vmm.v_swapin, PAGEROW + 2, PAGECOL + 17, 5);
547 PUTRATE(Vmm.v_swapout, PAGEROW + 2, PAGECOL + 22, 5);
548 PUTRATE(Vmm.v_vnodepgsin, PAGEROW + 3, PAGECOL + 5, 5);
549 PUTRATE(Vmm.v_vnodepgsout, PAGEROW + 3, PAGECOL + 10, 5);
550 PUTRATE(Vmm.v_swappgsin, PAGEROW + 3, PAGECOL + 17, 5);
551 PUTRATE(Vmm.v_swappgsout, PAGEROW + 3, PAGECOL + 22, 5);
552 PUTRATE(Vmm.v_swtch, GENSTATROW + 1, GENSTATCOL, 5);
553 PUTRATE(Vmm.v_trap, GENSTATROW + 1, GENSTATCOL + 5, 5);
554 PUTRATE(Vmm.v_syscall, GENSTATROW + 1, GENSTATCOL + 10, 5);
555 PUTRATE(Vmm.v_intr, GENSTATROW + 1, GENSTATCOL + 15, 5);
556 PUTRATE(Vmm.v_soft, GENSTATROW + 1, GENSTATCOL + 20, 5);
557 PUTRATE(Vmm.v_vm_faults, GENSTATROW + 1, GENSTATCOL + 25, 5);
558 mvprintw(DISKROW, DISKCOL + 5, " ");
559 for (i = 0, c = 0; i < num_devices && c < MAXDRIVES; i++)
560 if (dev_select[i].selected) {
562 sprintf(tmpstr, "%s%d", dev_select[i].device_name,
563 dev_select[i].unit_number);
564 mvprintw(DISKROW, DISKCOL + 5 + 6 * c,
568 dinfo(i, ++c, &cur, &last);
571 dinfo(i, ++c, &cur, &run);
574 dinfo(i, ++c, &cur, NULL);
578 putint(s.nchcount, NAMEIROW + 2, NAMEICOL, 9);
579 putint((nchtotal.ncs_goodhits + nchtotal.ncs_neghits),
580 NAMEIROW + 2, NAMEICOL + 9, 9);
581 #define nz(x) ((x) ? (x) : 1)
582 putfloat((nchtotal.ncs_goodhits+nchtotal.ncs_neghits) *
583 100.0 / nz(s.nchcount),
584 NAMEIROW + 2, NAMEICOL + 19, 4, 0, 1);
585 putint(nchtotal.ncs_pass2, NAMEIROW + 2, NAMEICOL + 23, 9);
586 putfloat(nchtotal.ncs_pass2 * 100.0 / nz(s.nchcount),
587 NAMEIROW + 2, NAMEICOL + 33, 4, 0, 1);
592 cmdkre(char *cmd, char *args)
596 if (prefix(cmd, "run")) {
599 switch (getdevs(&run)) {
601 errx(1, "%s", devstat_errbuf);
604 num_devices = run.dinfo->numdevs;
605 generation = run.dinfo->generation;
606 retval = dscmd("refresh", NULL, MAXDRIVES, &cur);
616 if (prefix(cmd, "boot")) {
621 if (prefix(cmd, "time")) {
625 if (prefix(cmd, "zero")) {
629 switch (getdevs(&run)) {
631 errx(1, "%s", devstat_errbuf);
634 num_devices = run.dinfo->numdevs;
635 generation = run.dinfo->generation;
636 retval = dscmd("refresh",NULL, MAXDRIVES, &cur);
646 retval = dscmd(cmd, args, MAXDRIVES, &cur);
654 /* calculate number of users on the system */
658 register int nusers = 0;
662 while (read(ut, &utmp, sizeof(utmp)))
663 if (utmp.ut_name[0] != '\0')
666 lseek(ut, 0L, L_SET);
671 putint(int n, int l, int c, int w)
681 snprintf(b, sizeof(b), "%*d", w, n);
691 putfloat(double f, int l, int c, int w, int d, int nz)
696 if (nz && f == 0.0) {
701 snprintf(b, sizeof(b), "%*.*f", w, d, f);
703 snprintf(b, sizeof(b), "%*.0f", w, f);
713 putlongdouble(long double f, int l, int c, int w, int d, int nz)
718 if (nz && f == 0.0) {
723 sprintf(b, "%*.*Lf", w, d, f);
725 sprintf(b, "%*.0Lf", w, f);
735 getinfo(struct Info *s, enum state st)
737 struct devinfo *tmp_dinfo;
738 struct nchstats *nch_tmp;
740 int vms_size = sizeof(s->Vms);
741 int vmm_size = sizeof(s->Vmm);
742 size_t nch_size = sizeof(s->nchstats) * SMP_MAXCPU;
744 if (sysctlbyname("vm.vmstats", &s->Vms, &vms_size, NULL, 0)) {
745 perror("sysctlbyname: vm.vmstats");
748 if (sysctlbyname("vm.vmmeter", &s->Vmm, &vmm_size, NULL, 0)) {
749 perror("sysctlbyname: vm.vmstats");
753 if (kinfo_get_sched_cputime(&s->cp_time))
754 err(1, "kinfo_get_sched_cputime");
755 if (kinfo_get_sched_cputime(&cp_time))
756 err(1, "kinfo_get_sched_cputime");
757 NREAD(X_BUFFERSPACE, &s->bufspace, sizeof(s->bufspace));
758 NREAD(X_DESIREDVNODES, &s->desiredvnodes, sizeof(s->desiredvnodes));
759 NREAD(X_NUMVNODES, &s->numvnodes, LONG);
760 NREAD(X_FREEVNODES, &s->freevnodes, LONG);
761 NREAD(X_INTRCNT, s->intrcnt, nintr * LONG);
762 NREAD(X_NUMDIRTYBUFFERS, &s->numdirtybuffers, sizeof(s->numdirtybuffers));
763 size = sizeof(s->Total);
764 if (sysctlbyname("vm.vmtotal", &s->Total, &size, NULL, 0) < 0) {
765 error("Can't get kernel info: %s\n", strerror(errno));
766 bzero(&s->Total, sizeof(s->Total));
769 if ((nch_tmp = malloc(nch_size)) == NULL) {
773 if (sysctlbyname("vfs.cache.nchstats", nch_tmp, &nch_size, NULL, 0)) {
774 perror("sysctlbyname vfs.cache.nchstats");
778 if ((nch_tmp = realloc(nch_tmp, nch_size)) == NULL) {
785 if (kinfo_get_cpus(&ncpu))
786 err(1, "kinfo_get_cpus");
787 kvm_nch_cpuagg(nch_tmp, &s->nchstats, ncpu);
790 tmp_dinfo = last.dinfo;
791 last.dinfo = cur.dinfo;
792 cur.dinfo = tmp_dinfo;
794 last.busy_time = cur.busy_time;
795 switch (getdevs(&cur)) {
797 errx(1, "%s", devstat_errbuf);
800 num_devices = cur.dinfo->numdevs;
801 generation = cur.dinfo->generation;
802 cmdkre("refresh", NULL);
810 allocinfo(struct Info *s)
813 s->intrcnt = (long *) calloc(nintr, sizeof(long));
814 if (s->intrcnt == NULL)
815 errx(2, "out of memory");
819 copyinfo(register struct Info *from, register struct Info *to)
824 * time, wds, seek, and xfer are malloc'd so we have to
825 * save the pointers before the structure copy and then
828 intrcnt = to->intrcnt;
831 bcopy(from->intrcnt, to->intrcnt = intrcnt, nintr * sizeof (int));
835 dinfo(int dn, int c, struct statinfo *now, struct statinfo *then)
837 long double transfers_per_second;
838 long double kb_per_transfer, mb_per_second;
839 long double elapsed_time, device_busy;
842 di = dev_select[dn].position;
844 elapsed_time = compute_etime(now->busy_time, then ?
846 now->dinfo->devices[di].dev_creation_time);
848 device_busy = compute_etime(now->dinfo->devices[di].busy_time, then ?
849 then->dinfo->devices[di].busy_time :
850 now->dinfo->devices[di].dev_creation_time);
852 if (compute_stats(&now->dinfo->devices[di], then ?
853 &then->dinfo->devices[di] : NULL, elapsed_time,
855 &kb_per_transfer, &transfers_per_second,
856 &mb_per_second, NULL, NULL) != 0)
857 errx(1, "%s", devstat_errbuf);
859 if ((device_busy == 0) && (transfers_per_second > 5))
860 /* the device has been 100% busy, fake it because
861 * as long as the device is 100% busy the busy_time
862 * field in the devstat struct is not updated */
863 device_busy = elapsed_time;
864 if (device_busy > elapsed_time)
865 /* this normally happens after one or more periods
866 * where the device has been 100% busy, correct it */
867 device_busy = elapsed_time;
870 putlongdouble(kb_per_transfer, DISKROW + 1, c, 5, 2, 0);
871 putlongdouble(transfers_per_second, DISKROW + 2, c, 5, 0, 0);
872 putlongdouble(mb_per_second, DISKROW + 3, c, 5, 2, 0);
873 putlongdouble(device_busy * 100 / elapsed_time, DISKROW + 4, c, 5, 0, 0);