xref: /freebsd/usr.bin/systat/vmstat.c (revision 5861f9665471e98e544f6fa3ce73c4912229ff82)
1 /*-
2  * Copyright (c) 1983, 1989, 1992, 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 
34 #include <sys/cdefs.h>
35 
36 __FBSDID("$FreeBSD$");
37 
38 #ifdef lint
39 static const char sccsid[] = "@(#)vmstat.c	8.2 (Berkeley) 1/12/94";
40 #endif
41 
42 /*
43  * Cursed vmstat -- from Robert Elz.
44  */
45 
46 #include <sys/param.h>
47 #include <sys/stat.h>
48 #include <sys/time.h>
49 #include <sys/proc.h>
50 #include <sys/uio.h>
51 #include <sys/namei.h>
52 #include <sys/resource.h>
53 #include <sys/sysctl.h>
54 #include <sys/vmmeter.h>
55 
56 #include <vm/vm_param.h>
57 
58 #include <ctype.h>
59 #include <err.h>
60 #include <errno.h>
61 #include <langinfo.h>
62 #include <nlist.h>
63 #include <paths.h>
64 #include <signal.h>
65 #include <stdlib.h>
66 #include <string.h>
67 #include <time.h>
68 #include <unistd.h>
69 #include <utmp.h>
70 #include <devstat.h>
71 #include "systat.h"
72 #include "extern.h"
73 #include "devs.h"
74 
75 static struct Info {
76 	long	time[CPUSTATES];
77 	u_int v_swtch;		/* context switches */
78 	u_int v_trap;		/* calls to trap */
79 	u_int v_syscall;	/* calls to syscall() */
80 	u_int v_intr;		/* device interrupts */
81 	u_int v_soft;		/* software interrupts */
82 	/*
83 	 * Virtual memory activity.
84 	 */
85 	u_int v_vm_faults;	/* number of address memory faults */
86 	u_int v_cow_faults;	/* number of copy-on-writes */
87 	u_int v_zfod;		/* pages zero filled on demand */
88 	u_int v_ozfod;		/* optimized zero fill pages */
89 	u_int v_swapin;		/* swap pager pageins */
90 	u_int v_swapout;	/* swap pager pageouts */
91 	u_int v_swappgsin;	/* swap pager pages paged in */
92 	u_int v_swappgsout;	/* swap pager pages paged out */
93 	u_int v_vnodein;	/* vnode pager pageins */
94 	u_int v_vnodeout;	/* vnode pager pageouts */
95 	u_int v_vnodepgsin;	/* vnode_pager pages paged in */
96 	u_int v_vnodepgsout;	/* vnode pager pages paged out */
97 	u_int v_intrans;	/* intransit blocking page faults */
98 	u_int v_reactivated;	/* number of pages reactivated from free list */
99 	u_int v_pdwakeups;	/* number of times daemon has awaken from sleep */
100 	u_int v_pdpages;	/* number of pages analyzed by daemon */
101 
102 	u_int v_dfree;		/* pages freed by daemon */
103 	u_int v_pfree;		/* pages freed by exiting processes */
104 	u_int v_tfree;		/* total pages freed */
105 	/*
106 	 * Distribution of page usages.
107 	 */
108 	u_int v_page_size;	/* page size in bytes */
109 	u_int v_free_count;	/* number of pages free */
110 	u_int v_wire_count;	/* number of pages wired down */
111 	u_int v_active_count;	/* number of pages active */
112 	u_int v_inactive_count;	/* number of pages inactive */
113 	u_int v_cache_count;	/* number of pages on buffer cache queue */
114 	struct	vmtotal Total;
115 	struct	nchstats nchstats;
116 	long	nchcount;
117 	long	*intrcnt;
118 	long	bufspace;
119 	int	desiredvnodes;
120 	long	numvnodes;
121 	long	freevnodes;
122 	int	numdirtybuffers;
123 } s, s1, s2, z;
124 
125 struct statinfo cur, last, run;
126 
127 #define	total s.Total
128 #define	nchtotal s.nchstats
129 #define	oldnchtotal s1.nchstats
130 
131 static	enum state { BOOT, TIME, RUN } state = TIME;
132 
133 static void allocinfo(struct Info *);
134 static void copyinfo(struct Info *, struct Info *);
135 static float cputime(int);
136 static void dinfo(int, int, struct statinfo *, struct statinfo *);
137 static void getinfo(struct Info *);
138 static void putint(int, int, int, int);
139 static void putfloat(double, int, int, int, int, int);
140 static void putlongdouble(long double, int, int, int, int, int);
141 static int ucount(void);
142 
143 static	int ncpu;
144 static	int ut;
145 static	char buf[26];
146 static	time_t t;
147 static	double etime;
148 static	int nintr;
149 static	long *intrloc;
150 static	char **intrname;
151 static	int nextintsrow;
152 
153 struct	utmp utmp;
154 
155 
156 WINDOW *
157 openkre(void)
158 {
159 
160 	ut = open(_PATH_UTMP, O_RDONLY);
161 	if (ut < 0)
162 		error("No utmp");
163 	return (stdscr);
164 }
165 
166 void
167 closekre(WINDOW *w)
168 {
169 
170 	(void) close(ut);
171 	if (w == NULL)
172 		return;
173 	wclear(w);
174 	wrefresh(w);
175 }
176 
177 /*
178  * These constants define where the major pieces are laid out
179  */
180 #define STATROW		 0	/* uses 1 row and 67 cols */
181 #define STATCOL		 0
182 #define MEMROW		 2	/* uses 4 rows and 45 cols */
183 #define MEMCOL		 0
184 #define PAGEROW		 2	/* uses 4 rows and 30 cols */
185 #define PAGECOL		47
186 #define INTSROW		 6	/* uses all rows to bottom and 16 cols */
187 #define INTSCOL		64
188 #define PROCSROW	 6	/* uses 3 rows and 19 cols */
189 #define PROCSCOL	 0
190 #define GENSTATROW	 7	/* uses 2 rows and 29 cols */
191 #define GENSTATCOL	21
192 #define VMSTATROW	 7	/* uses 17 rows and 12-14 cols */
193 #define VMSTATCOL	49	/* actually 50-51 for some fields */
194 #define GRAPHROW	10	/* uses 3 rows and 49-51 cols */
195 #define GRAPHCOL	 0
196 #define VNSTATROW	13	/* uses 4 rows and 13 columns */
197 #define VNSTATCOL	35
198 #define NAMEIROW	14	/* uses 3 rows and 32 cols */
199 #define NAMEICOL	 0
200 #define DISKROW		18	/* uses 5 rows and 47 cols (for 7 drives) */
201 #define DISKCOL		 0
202 
203 #define	DRIVESPACE	 7	/* max # for space */
204 
205 #define	MAXDRIVES	DRIVESPACE	 /* max # to display */
206 
207 int
208 initkre(void)
209 {
210 	char *cp, *cp1, *cp2, *intrnamebuf, *nextcp;
211 	int i;
212 	size_t sz;
213 
214 	if ((num_devices = devstat_getnumdevs(NULL)) < 0) {
215 		warnx("%s", devstat_errbuf);
216 		return(0);
217 	}
218 
219 	cur.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
220 	last.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
221 	run.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
222 	bzero(cur.dinfo, sizeof(struct devinfo));
223 	bzero(last.dinfo, sizeof(struct devinfo));
224 	bzero(run.dinfo, sizeof(struct devinfo));
225 
226 	if (dsinit(MAXDRIVES, &cur, &last, &run) != 1)
227 		return(0);
228 
229 	if (nintr == 0) {
230 		if (sysctlbyname("hw.intrcnt", NULL, &sz, NULL, 0) == -1) {
231 			error("sysctl(hw.intrcnt...) failed: %s",
232 			      strerror(errno));
233 			return (0);
234 		}
235 		nintr = sz / sizeof(u_long);
236 		intrloc = calloc(nintr, sizeof (long));
237 		intrname = calloc(nintr, sizeof (char *));
238 		intrnamebuf = sysctl_dynread("hw.intrnames", NULL);
239 		if (intrnamebuf == NULL || intrname == NULL ||
240 		    intrloc == NULL) {
241 			error("Out of memory");
242 			if (intrnamebuf)
243 				free(intrnamebuf);
244 			if (intrname)
245 				free(intrname);
246 			if (intrloc)
247 				free(intrloc);
248 			nintr = 0;
249 			return(0);
250 		}
251 		for (cp = intrnamebuf, i = 0; i < nintr; i++) {
252 			nextcp = cp + strlen(cp) + 1;
253 
254 			/* Discard trailing spaces. */
255 			for (cp1 = nextcp - 1; cp1 > cp && *(cp1 - 1) == ' '; )
256 				*--cp1 = '\0';
257 
258 			/* Convert "irqN: name" to "name irqN". */
259 			if (strncmp(cp, "irq", 3) == 0) {
260 				cp1 = cp + 3;
261 				while (isdigit((u_char)*cp1))
262 					cp1++;
263 				if (cp1 != cp && *cp1 == ':' &&
264 				    *(cp1 + 1) == ' ') {
265 					*cp1 = '\0';
266 					cp1 = cp1 + 2;
267 					cp2 = strdup(cp);
268 					bcopy(cp1, cp, strlen(cp1) + 1);
269 					strcat(cp, " ");
270 					strcat(cp, cp2);
271 					free(cp2);
272 				}
273 			}
274 
275 			/*
276 			 * Convert "name irqN" to "name N" if the former is
277 			 * longer than the field width.
278 			 */
279 			if ((cp1 = strstr(cp, "irq")) != NULL &&
280 			    strlen(cp) > 10)
281 				bcopy(cp1 + 3, cp1, strlen(cp1 + 3) + 1);
282 
283 			intrname[i] = cp;
284 			cp = nextcp;
285 		}
286 		nextintsrow = INTSROW + 2;
287 		allocinfo(&s);
288 		allocinfo(&s1);
289 		allocinfo(&s2);
290 		allocinfo(&z);
291 	}
292 	getinfo(&s2);
293 	copyinfo(&s2, &s1);
294 	return(1);
295 }
296 
297 void
298 fetchkre(void)
299 {
300 	time_t now;
301 	struct tm *tp;
302 	static int d_first = -1;
303 
304 	if (d_first < 0)
305 		d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
306 
307 	time(&now);
308 	tp = localtime(&now);
309 	(void) strftime(buf, sizeof(buf),
310 			d_first ? "%e %b %R" : "%b %e %R", tp);
311 	getinfo(&s);
312 }
313 
314 void
315 labelkre(void)
316 {
317 	int i, j;
318 
319 	clear();
320 	mvprintw(STATROW, STATCOL + 6, "users    Load");
321 	mvprintw(MEMROW, MEMCOL, "Mem:KB    REAL            VIRTUAL");
322 	mvprintw(MEMROW + 1, MEMCOL, "        Tot   Share      Tot    Share");
323 	mvprintw(MEMROW + 2, MEMCOL, "Act");
324 	mvprintw(MEMROW + 3, MEMCOL, "All");
325 
326 	mvprintw(MEMROW + 1, MEMCOL + 41, "Free");
327 
328 	mvprintw(PAGEROW, PAGECOL,     "         VN PAGER   SWAP PAGER");
329 	mvprintw(PAGEROW + 1, PAGECOL, "         in   out     in   out");
330 	mvprintw(PAGEROW + 2, PAGECOL, "count");
331 	mvprintw(PAGEROW + 3, PAGECOL, "pages");
332 
333 	mvprintw(INTSROW, INTSCOL + 1, "Interrupts");
334 	mvprintw(INTSROW + 1, INTSCOL + 6, "total");
335 
336 	mvprintw(VMSTATROW, VMSTATCOL + 9, "cow");
337 	mvprintw(VMSTATROW + 1, VMSTATCOL + 9, "zfod");
338 	mvprintw(VMSTATROW + 2, VMSTATCOL + 9, "ozfod");
339 	mvprintw(VMSTATROW + 3, VMSTATCOL + 9 - 1, "%%ozfod");
340 	mvprintw(VMSTATROW + 4, VMSTATCOL + 9, "daefr");
341 	mvprintw(VMSTATROW + 5, VMSTATCOL + 9, "prcfr");
342 	mvprintw(VMSTATROW + 6, VMSTATCOL + 9, "totfr");
343 	mvprintw(VMSTATROW + 7, VMSTATCOL + 9, "react");
344 	mvprintw(VMSTATROW + 8, VMSTATCOL + 9, "pdwak");
345 	mvprintw(VMSTATROW + 9, VMSTATCOL + 9, "pdpgs");
346 	mvprintw(VMSTATROW + 10, VMSTATCOL + 9, "intrn");
347 	mvprintw(VMSTATROW + 11, VMSTATCOL + 9, "wire");
348 	mvprintw(VMSTATROW + 12, VMSTATCOL + 9, "act");
349 	mvprintw(VMSTATROW + 13, VMSTATCOL + 9, "inact");
350 	mvprintw(VMSTATROW + 14, VMSTATCOL + 9, "cache");
351 	mvprintw(VMSTATROW + 15, VMSTATCOL + 9, "free");
352 	if (LINES - 1 > VMSTATROW + 16)
353 		mvprintw(VMSTATROW + 16, VMSTATCOL + 9, "buf");
354 
355 	mvprintw(GENSTATROW, GENSTATCOL, " Csw  Trp  Sys  Int  Sof  Flt");
356 
357 	mvprintw(GRAPHROW, GRAPHCOL,
358 		"  . %%Sys    . %%Intr   . %%User   . %%Nice   . %%Idle");
359 	mvprintw(PROCSROW, PROCSCOL, "Proc:");
360 	mvprintw(PROCSROW + 1, PROCSCOL, "  r   p   d   s   w");
361 	mvprintw(GRAPHROW + 1, GRAPHCOL,
362 		"|    |    |    |    |    |    |    |    |    |    |");
363 
364 	mvprintw(VNSTATROW, VNSTATCOL + 8, "dtbuf");
365 	mvprintw(VNSTATROW + 1, VNSTATCOL + 8, "desvn");
366 	mvprintw(VNSTATROW + 2, VNSTATCOL + 8, "numvn");
367 	mvprintw(VNSTATROW + 3, VNSTATCOL + 8, "frevn");
368 
369 	mvprintw(NAMEIROW, NAMEICOL, "Namei     Name-cache   Dir-cache");
370 	mvprintw(NAMEIROW + 1, NAMEICOL,
371 		"   Calls    hits   %%    hits   %%");
372 	mvprintw(DISKROW, DISKCOL, "Disks");
373 	mvprintw(DISKROW + 1, DISKCOL, "KB/t");
374 	mvprintw(DISKROW + 2, DISKCOL, "tps");
375 	mvprintw(DISKROW + 3, DISKCOL, "MB/s");
376 	mvprintw(DISKROW + 4, DISKCOL, "%%busy");
377 	/*
378 	 * For now, we don't support a fourth disk statistic.  So there's
379 	 * no point in providing a label for it.  If someone can think of a
380 	 * fourth useful disk statistic, there is room to add it.
381 	 */
382 	/* mvprintw(DISKROW + 4, DISKCOL, " msps"); */
383 	j = 0;
384 	for (i = 0; i < num_devices && j < MAXDRIVES; i++)
385 		if (dev_select[i].selected) {
386 			char tmpstr[80];
387 			sprintf(tmpstr, "%s%d", dev_select[i].device_name,
388 				dev_select[i].unit_number);
389 			mvprintw(DISKROW, DISKCOL + 5 + 6 * j,
390 				" %5.5s", tmpstr);
391 			j++;
392 		}
393 
394 	for (i = 0; i < nintr; i++) {
395 		if (intrloc[i] == 0)
396 			continue;
397 		mvprintw(intrloc[i], INTSCOL + 6, "%-10.10s", intrname[i]);
398 	}
399 }
400 
401 #define X(fld)	{t=s.fld[i]; s.fld[i]-=s1.fld[i]; if(state==TIME) s1.fld[i]=t;}
402 #define Q(fld)	{t=cur.fld[i]; cur.fld[i]-=last.fld[i]; if(state==TIME) last.fld[i]=t;}
403 #define Y(fld)	{t = s.fld; s.fld -= s1.fld; if(state == TIME) s1.fld = t;}
404 #define Z(fld)	{t = s.nchstats.fld; s.nchstats.fld -= s1.nchstats.fld; \
405 	if(state == TIME) s1.nchstats.fld = t;}
406 #define PUTRATE(fld, l, c, w) \
407 do { \
408 	Y(fld); \
409 	putint((int)((float)s.fld/etime + 0.5), l, c, w); \
410 } while (0)
411 #define MAXFAIL 5
412 
413 static	char cpuchar[CPUSTATES] = { '=' , '+', '>', '-', ' ' };
414 static	char cpuorder[CPUSTATES] = { CP_SYS, CP_INTR, CP_USER, CP_NICE,
415 				     CP_IDLE };
416 
417 void
418 showkre(void)
419 {
420 	float f1, f2;
421 	int psiz, inttotal;
422 	int i, l, lc;
423 	static int failcnt = 0;
424 
425 	etime = 0;
426 	for(i = 0; i < CPUSTATES; i++) {
427 		X(time);
428 		Q(cp_time);
429 		etime += s.time[i];
430 	}
431 	if (etime < 5.0) {	/* < 5 ticks - ignore this trash */
432 		if (failcnt++ >= MAXFAIL) {
433 			clear();
434 			mvprintw(2, 10, "The alternate system clock has died!");
435 			mvprintw(3, 10, "Reverting to ``pigs'' display.");
436 			move(CMDLINE, 0);
437 			refresh();
438 			failcnt = 0;
439 			sleep(5);
440 			command("pigs");
441 		}
442 		return;
443 	}
444 	failcnt = 0;
445 	etime /= hertz;
446 	etime /= ncpu;
447 	inttotal = 0;
448 	for (i = 0; i < nintr; i++) {
449 		if (s.intrcnt[i] == 0)
450 			continue;
451 		if (intrloc[i] == 0) {
452 			if (nextintsrow == LINES)
453 				continue;
454 			intrloc[i] = nextintsrow++;
455 			mvprintw(intrloc[i], INTSCOL + 6, "%-10.10s",
456 				intrname[i]);
457 		}
458 		X(intrcnt);
459 		l = (int)((float)s.intrcnt[i]/etime + 0.5);
460 		inttotal += l;
461 		putint(l, intrloc[i], INTSCOL, 5);
462 	}
463 	putint(inttotal, INTSROW + 1, INTSCOL, 5);
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;
468 	if (state == TIME)
469 		s1.nchcount = s.nchcount;
470 
471 	psiz = 0;
472 	f2 = 0.0;
473 	for (lc = 0; lc < CPUSTATES; lc++) {
474 		i = cpuorder[lc];
475 		f1 = cputime(i);
476 		f2 += f1;
477 		l = (int) ((f2 + 1.0) / 2.0) - psiz;
478 		putfloat(f1, GRAPHROW, GRAPHCOL + 10 * lc, 4, 1, 0);
479 		move(GRAPHROW + 2, psiz);
480 		psiz += l;
481 		while (l-- > 0)
482 			addch(cpuchar[lc]);
483 	}
484 
485 	putint(ucount(), STATROW, STATCOL, 5);
486 	putfloat(avenrun[0], STATROW, STATCOL + 20, 5, 2, 0);
487 	putfloat(avenrun[1], STATROW, STATCOL + 26, 5, 2, 0);
488 	putfloat(avenrun[2], STATROW, STATCOL + 32, 5, 2, 0);
489 	mvaddstr(STATROW, STATCOL + 55, buf);
490 #define pgtokb(pg)	((pg) * (s.v_page_size / 1024))
491 	putint(pgtokb(total.t_arm), MEMROW + 2, MEMCOL + 4, 7);
492 	putint(pgtokb(total.t_armshr), MEMROW + 2, MEMCOL + 12, 7);
493 	putint(pgtokb(total.t_avm), MEMROW + 2, MEMCOL + 20, 8);
494 	putint(pgtokb(total.t_avmshr), MEMROW + 2, MEMCOL + 29, 8);
495 	putint(pgtokb(total.t_rm), MEMROW + 3, MEMCOL + 4, 7);
496 	putint(pgtokb(total.t_rmshr), MEMROW + 3, MEMCOL + 12, 7);
497 	putint(pgtokb(total.t_vm), MEMROW + 3, MEMCOL + 20, 8);
498 	putint(pgtokb(total.t_vmshr), MEMROW + 3, MEMCOL + 29, 8);
499 	putint(pgtokb(total.t_free), MEMROW + 2, MEMCOL + 38, 7);
500 	putint(total.t_rq - 1, PROCSROW + 2, PROCSCOL, 3);
501 	putint(total.t_pw, PROCSROW + 2, PROCSCOL + 4, 3);
502 	putint(total.t_dw, PROCSROW + 2, PROCSCOL + 8, 3);
503 	putint(total.t_sl, PROCSROW + 2, PROCSCOL + 12, 3);
504 	putint(total.t_sw, PROCSROW + 2, PROCSCOL + 16, 3);
505 	PUTRATE(v_cow_faults, VMSTATROW, VMSTATCOL + 2, 8 - 2);
506 	PUTRATE(v_zfod, VMSTATROW + 1, VMSTATCOL + 2, 8 - 2);
507 	PUTRATE(v_ozfod, VMSTATROW + 2, VMSTATCOL, 8);
508 	putint(s.v_zfod != 0 ? (int)(s.v_ozfod * 100.0 / s.v_zfod) : 0,
509 	    VMSTATROW + 3, VMSTATCOL + 1, 8 - 1);
510 	PUTRATE(v_dfree, VMSTATROW + 4, VMSTATCOL + 2, 8 - 2);
511 	PUTRATE(v_pfree, VMSTATROW + 5, VMSTATCOL + 2, 8 - 2);
512 	PUTRATE(v_tfree, VMSTATROW + 6, VMSTATCOL, 8);
513 	PUTRATE(v_reactivated, VMSTATROW + 7, VMSTATCOL, 8);
514 	PUTRATE(v_pdwakeups, VMSTATROW + 8, VMSTATCOL, 8);
515 	PUTRATE(v_pdpages, VMSTATROW + 9, VMSTATCOL, 8);
516 	PUTRATE(v_intrans, VMSTATROW + 10, VMSTATCOL, 8);
517 	putint(pgtokb(s.v_wire_count), VMSTATROW + 11, VMSTATCOL, 8);
518 	putint(pgtokb(s.v_active_count), VMSTATROW + 12, VMSTATCOL, 8);
519 	putint(pgtokb(s.v_inactive_count), VMSTATROW + 13, VMSTATCOL, 8);
520 	putint(pgtokb(s.v_cache_count), VMSTATROW + 14, VMSTATCOL, 8);
521 	putint(pgtokb(s.v_free_count), VMSTATROW + 15, VMSTATCOL, 8);
522 	if (LINES - 1 > VMSTATROW + 16)
523 		putint(s.bufspace / 1024, VMSTATROW + 16, VMSTATCOL, 8);
524 	PUTRATE(v_vnodein, PAGEROW + 2, PAGECOL + 6, 5);
525 	PUTRATE(v_vnodeout, PAGEROW + 2, PAGECOL + 12, 5);
526 	PUTRATE(v_swapin, PAGEROW + 2, PAGECOL + 19, 5);
527 	PUTRATE(v_swapout, PAGEROW + 2, PAGECOL + 25, 5);
528 	PUTRATE(v_vnodepgsin, PAGEROW + 3, PAGECOL + 6, 5);
529 	PUTRATE(v_vnodepgsout, PAGEROW + 3, PAGECOL + 12, 5);
530 	PUTRATE(v_swappgsin, PAGEROW + 3, PAGECOL + 19, 5);
531 	PUTRATE(v_swappgsout, PAGEROW + 3, PAGECOL + 25, 5);
532 	PUTRATE(v_swtch, GENSTATROW + 1, GENSTATCOL, 4);
533 	PUTRATE(v_trap, GENSTATROW + 1, GENSTATCOL + 5, 4);
534 	PUTRATE(v_syscall, GENSTATROW + 1, GENSTATCOL + 10, 4);
535 	PUTRATE(v_intr, GENSTATROW + 1, GENSTATCOL + 15, 4);
536 	PUTRATE(v_soft, GENSTATROW + 1, GENSTATCOL + 20, 4);
537 	PUTRATE(v_vm_faults, GENSTATROW + 1, GENSTATCOL + 25, 4);
538 	for (i = 0, lc = 0; i < num_devices && lc < MAXDRIVES; i++)
539 		if (dev_select[i].selected) {
540 			switch(state) {
541 			case TIME:
542 				dinfo(i, ++lc, &cur, &last);
543 				break;
544 			case RUN:
545 				dinfo(i, ++lc, &cur, &run);
546 				break;
547 			case BOOT:
548 				dinfo(i, ++lc, &cur, NULL);
549 				break;
550 			}
551 		}
552 	putint(s.numdirtybuffers, VNSTATROW, VNSTATCOL, 7);
553 	putint(s.desiredvnodes, VNSTATROW + 1, VNSTATCOL, 7);
554 	putint(s.numvnodes, VNSTATROW + 2, VNSTATCOL, 7);
555 	putint(s.freevnodes, VNSTATROW + 3, VNSTATCOL, 7);
556 	putint(s.nchcount, NAMEIROW + 2, NAMEICOL, 8);
557 	putint((nchtotal.ncs_goodhits + nchtotal.ncs_neghits),
558 	   NAMEIROW + 2, NAMEICOL + 9, 7);
559 #define nz(x)	((x) ? (x) : 1)
560 	putfloat((nchtotal.ncs_goodhits+nchtotal.ncs_neghits) *
561 	   100.0 / nz(s.nchcount),
562 	   NAMEIROW + 2, NAMEICOL + 17, 3, 0, 1);
563 	putint(nchtotal.ncs_pass2, NAMEIROW + 2, NAMEICOL + 21, 7);
564 	putfloat(nchtotal.ncs_pass2 * 100.0 / nz(s.nchcount),
565 	   NAMEIROW + 2, NAMEICOL + 29, 3, 0, 1);
566 #undef nz
567 }
568 
569 int
570 cmdkre(const char *cmd, const char *args)
571 {
572 	int retval;
573 
574 	if (prefix(cmd, "run")) {
575 		retval = 1;
576 		copyinfo(&s2, &s1);
577 		switch (devstat_getdevs(NULL, &run)) {
578 		case -1:
579 			errx(1, "%s", devstat_errbuf);
580 			break;
581 		case 1:
582 			num_devices = run.dinfo->numdevs;
583 			generation = run.dinfo->generation;
584 			retval = dscmd("refresh", NULL, MAXDRIVES, &cur);
585 			if (retval == 2)
586 				labelkre();
587 			break;
588 		default:
589 			break;
590 		}
591 		state = RUN;
592 		return (retval);
593 	}
594 	if (prefix(cmd, "boot")) {
595 		state = BOOT;
596 		copyinfo(&z, &s1);
597 		return (1);
598 	}
599 	if (prefix(cmd, "time")) {
600 		state = TIME;
601 		return (1);
602 	}
603 	if (prefix(cmd, "zero")) {
604 		retval = 1;
605 		if (state == RUN) {
606 			getinfo(&s1);
607 			switch (devstat_getdevs(NULL, &run)) {
608 			case -1:
609 				errx(1, "%s", devstat_errbuf);
610 				break;
611 			case 1:
612 				num_devices = run.dinfo->numdevs;
613 				generation = run.dinfo->generation;
614 				retval = dscmd("refresh",NULL, MAXDRIVES, &cur);
615 				if (retval == 2)
616 					labelkre();
617 				break;
618 			default:
619 				break;
620 			}
621 		}
622 		return (retval);
623 	}
624 	retval = dscmd(cmd, args, MAXDRIVES, &cur);
625 
626 	if (retval == 2)
627 		labelkre();
628 
629 	return(retval);
630 }
631 
632 /* calculate number of users on the system */
633 static int
634 ucount(void)
635 {
636 	int nusers = 0;
637 
638 	if (ut < 0)
639 		return (0);
640 	while (read(ut, &utmp, sizeof(utmp)))
641 		if (utmp.ut_name[0] != '\0')
642 			nusers++;
643 
644 	lseek(ut, 0L, L_SET);
645 	return (nusers);
646 }
647 
648 static float
649 cputime(int indx)
650 {
651 	double lt;
652 	int i;
653 
654 	lt = 0;
655 	for (i = 0; i < CPUSTATES; i++)
656 		lt += s.time[i];
657 	if (lt == 0.0)
658 		lt = 1.0;
659 	return (s.time[indx] * 100.0 / lt);
660 }
661 
662 static void
663 putint(int n, int l, int lc, int w)
664 {
665 	int snr;
666 	char b[128];
667 
668 	move(l, lc);
669 #ifdef DEBUG
670 		while (w-- > 0)
671 			addch('*');
672 		return;
673 #endif
674 	if (n == 0) {
675 		while (w-- > 0)
676 			addch(' ');
677 		return;
678 	}
679 	snr = snprintf(b, sizeof(b), "%*d", w, n);
680 	if (snr != w)
681 		snr = snprintf(b, sizeof(b), "%*dk", w - 1, n / 1000);
682 	if (snr != w)
683 		snr = snprintf(b, sizeof(b), "%*dM", w - 1, n / 1000000);
684 	if (snr != w) {
685 		while (w-- > 0)
686 			addch('*');
687 		return;
688 	}
689 	addstr(b);
690 }
691 
692 static void
693 putfloat(double f, int l, int lc, int w, int d, int nz)
694 {
695 	int snr;
696 	char b[128];
697 
698 	move(l, lc);
699 #ifdef DEBUG
700 		while (--w >= 0)
701 			addch('*');
702 		return;
703 #endif
704 	if (nz && f == 0.0) {
705 		while (--w >= 0)
706 			addch(' ');
707 		return;
708 	}
709 	snr = snprintf(b, sizeof(b), "%*.*f", w, d, f);
710 	if (snr != w)
711 		snr = snprintf(b, sizeof(b), "%*.0f", w, f);
712 	if (snr != w) {
713 		while (--w >= 0)
714 			addch('*');
715 		return;
716 	}
717 	addstr(b);
718 }
719 
720 static void
721 putlongdouble(long double f, int l, int lc, int w, int d, int nz)
722 {
723 	int snr;
724 	char b[128];
725 
726 	move(l, lc);
727 #ifdef DEBUG
728 		while (--w >= 0)
729 			addch('*');
730 		return;
731 #endif
732 	if (nz && f == 0.0) {
733 		while (--w >= 0)
734 			addch(' ');
735 		return;
736 	}
737 	snr = snprintf(b, sizeof(b), "%*.*Lf", w, d, f);
738 	if (snr != w)
739 		snr = snprintf(b, sizeof(b), "%*.0Lf", w, f);
740 	if (snr != w) {
741 		while (--w >= 0)
742 			addch('*');
743 		return;
744 	}
745 	addstr(b);
746 }
747 
748 static void
749 getinfo(struct Info *ls)
750 {
751 	struct devinfo *tmp_dinfo;
752 	size_t size;
753 	int mib[2];
754 
755 	GETSYSCTL("kern.cp_time", ls->time);
756 	GETSYSCTL("kern.cp_time", cur.cp_time);
757 	GETSYSCTL("vm.stats.sys.v_swtch", ls->v_swtch);
758 	GETSYSCTL("vm.stats.sys.v_trap", ls->v_trap);
759 	GETSYSCTL("vm.stats.sys.v_syscall", ls->v_syscall);
760 	GETSYSCTL("vm.stats.sys.v_intr", ls->v_intr);
761 	GETSYSCTL("vm.stats.sys.v_soft", ls->v_soft);
762 	GETSYSCTL("vm.stats.vm.v_vm_faults", ls->v_vm_faults);
763 	GETSYSCTL("vm.stats.vm.v_cow_faults", ls->v_cow_faults);
764 	GETSYSCTL("vm.stats.vm.v_zfod", ls->v_zfod);
765 	GETSYSCTL("vm.stats.vm.v_ozfod", ls->v_ozfod);
766 	GETSYSCTL("vm.stats.vm.v_swapin", ls->v_swapin);
767 	GETSYSCTL("vm.stats.vm.v_swapout", ls->v_swapout);
768 	GETSYSCTL("vm.stats.vm.v_swappgsin", ls->v_swappgsin);
769 	GETSYSCTL("vm.stats.vm.v_swappgsout", ls->v_swappgsout);
770 	GETSYSCTL("vm.stats.vm.v_vnodein", ls->v_vnodein);
771 	GETSYSCTL("vm.stats.vm.v_vnodeout", ls->v_vnodeout);
772 	GETSYSCTL("vm.stats.vm.v_vnodepgsin", ls->v_vnodepgsin);
773 	GETSYSCTL("vm.stats.vm.v_vnodepgsout", ls->v_vnodepgsout);
774 	GETSYSCTL("vm.stats.vm.v_intrans", ls->v_intrans);
775 	GETSYSCTL("vm.stats.vm.v_reactivated", ls->v_reactivated);
776 	GETSYSCTL("vm.stats.vm.v_pdwakeups", ls->v_pdwakeups);
777 	GETSYSCTL("vm.stats.vm.v_pdpages", ls->v_pdpages);
778 	GETSYSCTL("vm.stats.vm.v_dfree", ls->v_dfree);
779 	GETSYSCTL("vm.stats.vm.v_pfree", ls->v_pfree);
780 	GETSYSCTL("vm.stats.vm.v_tfree", ls->v_tfree);
781 	GETSYSCTL("vm.stats.vm.v_page_size", ls->v_page_size);
782 	GETSYSCTL("vm.stats.vm.v_free_count", ls->v_free_count);
783 	GETSYSCTL("vm.stats.vm.v_wire_count", ls->v_wire_count);
784 	GETSYSCTL("vm.stats.vm.v_active_count", ls->v_active_count);
785 	GETSYSCTL("vm.stats.vm.v_inactive_count", ls->v_inactive_count);
786 	GETSYSCTL("vm.stats.vm.v_cache_count", ls->v_cache_count);
787 	GETSYSCTL("vfs.bufspace", ls->bufspace);
788 	GETSYSCTL("kern.maxvnodes", ls->desiredvnodes);
789 	GETSYSCTL("vfs.numvnodes", ls->numvnodes);
790 	GETSYSCTL("vfs.freevnodes", ls->freevnodes);
791 	GETSYSCTL("vfs.cache.nchstats", ls->nchstats);
792 	GETSYSCTL("vfs.numdirtybuffers", ls->numdirtybuffers);
793 	getsysctl("hw.intrcnt", ls->intrcnt, nintr * sizeof(u_long));
794 
795 	size = sizeof(ls->Total);
796 	mib[0] = CTL_VM;
797 	mib[1] = VM_TOTAL;
798 	if (sysctl(mib, 2, &ls->Total, &size, NULL, 0) < 0) {
799 		error("Can't get kernel info: %s\n", strerror(errno));
800 		bzero(&ls->Total, sizeof(ls->Total));
801 	}
802 	size = sizeof(ncpu);
803 	if (sysctlbyname("hw.ncpu", &ncpu, &size, NULL, 0) < 0 ||
804 	    size != sizeof(ncpu))
805 		ncpu = 1;
806 
807 	tmp_dinfo = last.dinfo;
808 	last.dinfo = cur.dinfo;
809 	cur.dinfo = tmp_dinfo;
810 
811 	last.snap_time = cur.snap_time;
812 	switch (devstat_getdevs(NULL, &cur)) {
813 	case -1:
814 		errx(1, "%s", devstat_errbuf);
815 		break;
816 	case 1:
817 		num_devices = cur.dinfo->numdevs;
818 		generation = cur.dinfo->generation;
819 		cmdkre("refresh", NULL);
820 		break;
821 	default:
822 		break;
823 	}
824 }
825 
826 static void
827 allocinfo(struct Info *ls)
828 {
829 
830 	ls->intrcnt = (long *) calloc(nintr, sizeof(long));
831 	if (ls->intrcnt == NULL)
832 		errx(2, "out of memory");
833 }
834 
835 static void
836 copyinfo(struct Info *from, struct Info *to)
837 {
838 	long *intrcnt;
839 
840 	/*
841 	 * time, wds, seek, and xfer are malloc'd so we have to
842 	 * save the pointers before the structure copy and then
843 	 * copy by hand.
844 	 */
845 	intrcnt = to->intrcnt;
846 	*to = *from;
847 
848 	bcopy(from->intrcnt, to->intrcnt = intrcnt, nintr * sizeof (int));
849 }
850 
851 static void
852 dinfo(int dn, int lc, struct statinfo *now, struct statinfo *then)
853 {
854 	long double transfers_per_second;
855 	long double kb_per_transfer, mb_per_second;
856 	long double elapsed_time, device_busy;
857 	int di;
858 
859 	di = dev_select[dn].position;
860 
861 	if (then != NULL) {
862 		/* Calculate relative to previous sample */
863 		elapsed_time = now->snap_time - then->snap_time;
864 	} else {
865 		/* Calculate relative to device creation */
866 	        elapsed_time = now->snap_time - devstat_compute_etime(
867 		    &now->dinfo->devices[di].creation_time, NULL);
868 	}
869 
870 	if (devstat_compute_statistics(&now->dinfo->devices[di], then ?
871 	    &then->dinfo->devices[di] : NULL, elapsed_time,
872 	    DSM_KB_PER_TRANSFER, &kb_per_transfer,
873 	    DSM_TRANSFERS_PER_SECOND, &transfers_per_second,
874 	    DSM_MB_PER_SECOND, &mb_per_second,
875 	    DSM_BUSY_PCT, &device_busy,
876 	    DSM_NONE) != 0)
877 		errx(1, "%s", devstat_errbuf);
878 
879 	lc = DISKCOL + lc * 6;
880 	putlongdouble(kb_per_transfer, DISKROW + 1, lc, 5, 2, 0);
881 	putlongdouble(transfers_per_second, DISKROW + 2, lc, 5, 0, 0);
882 	putlongdouble(mb_per_second, DISKROW + 3, lc, 5, 2, 0);
883 	putlongdouble(device_busy, DISKROW + 4, lc, 5, 0, 0);
884 }
885