xref: /freebsd/usr.bin/systat/vmstat.c (revision 1f474190)
1 /*-
2  * SPDX-License-Identifier: BSD-3-Clause
3  *
4  * Copyright (c) 1983, 1989, 1992, 1993
5  *	The Regents of the University of California.  All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  * 3. Neither the name of the University nor the names of its contributors
16  *    may be used to endorse or promote products derived from this software
17  *    without specific prior written permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29  * SUCH DAMAGE.
30  */
31 
32 #include <sys/cdefs.h>
33 
34 __FBSDID("$FreeBSD$");
35 
36 #ifdef lint
37 static const char sccsid[] = "@(#)vmstat.c	8.2 (Berkeley) 1/12/94";
38 #endif
39 
40 /*
41  * Cursed vmstat -- from Robert Elz.
42  */
43 
44 #include <sys/param.h>
45 #include <sys/stat.h>
46 #include <sys/time.h>
47 #include <sys/proc.h>
48 #include <sys/uio.h>
49 #include <sys/namei.h>
50 #include <sys/resource.h>
51 #include <sys/sysctl.h>
52 #include <sys/vmmeter.h>
53 
54 #include <vm/vm_param.h>
55 
56 #include <ctype.h>
57 #include <err.h>
58 #include <errno.h>
59 #include <langinfo.h>
60 #include <libutil.h>
61 #include <nlist.h>
62 #include <paths.h>
63 #include <signal.h>
64 #include <stdlib.h>
65 #include <string.h>
66 #include <time.h>
67 #include <unistd.h>
68 #include <utmpx.h>
69 #include "systat.h"
70 #include "extern.h"
71 #include "devs.h"
72 
73 static struct Info {
74 	long	time[CPUSTATES];
75 	uint64_t v_swtch;	/* context switches */
76 	uint64_t v_trap;	/* calls to trap */
77 	uint64_t v_syscall;	/* calls to syscall() */
78 	uint64_t v_intr;	/* device interrupts */
79 	uint64_t v_soft;	/* software interrupts */
80 	/*
81 	 * Virtual memory activity.
82 	 */
83 	uint64_t v_vm_faults;	/* number of address memory faults */
84 	uint64_t v_io_faults;	/* page faults requiring I/O */
85 	uint64_t v_cow_faults;	/* number of copy-on-writes */
86 	uint64_t v_zfod;	/* pages zero filled on demand */
87 	uint64_t v_ozfod;	/* optimized zero fill pages */
88 	uint64_t v_swapin;	/* swap pager pageins */
89 	uint64_t v_swapout;	/* swap pager pageouts */
90 	uint64_t v_swappgsin;	/* swap pager pages paged in */
91 	uint64_t v_swappgsout;	/* swap pager pages paged out */
92 	uint64_t v_vnodein;	/* vnode pager pageins */
93 	uint64_t v_vnodeout;	/* vnode pager pageouts */
94 	uint64_t v_vnodepgsin;	/* vnode_pager pages paged in */
95 	uint64_t v_vnodepgsout;	/* vnode pager pages paged out */
96 	uint64_t v_intrans;	/* intransit blocking page faults */
97 	uint64_t v_reactivated;	/* number of pages reactivated by pagedaemon */
98 	uint64_t v_pdwakeups;	/* number of times daemon has awaken from sleep */
99 	uint64_t v_pdpages;	/* number of pages analyzed by daemon */
100 
101 	uint64_t v_dfree;	/* pages freed by daemon */
102 	uint64_t v_pfree;	/* pages freed by exiting processes */
103 	uint64_t v_tfree;	/* total pages freed */
104 	/*
105 	 * Distribution of page usages.
106 	 */
107 	u_int v_free_count;	/* number of pages free */
108 	u_int v_wire_count;	/* number of pages wired down */
109 	u_int v_active_count;	/* number of pages active */
110 	u_int v_inactive_count;	/* number of pages inactive */
111 	u_int v_laundry_count;	/* number of pages in laundry queue */
112 	u_long v_kmem_map_size;	/* Current kmem allocation size */
113 	struct	vmtotal Total;
114 	struct	nchstats nchstats;
115 	long	nchcount;
116 	long	*intrcnt;
117 	long	bufspace;
118 	u_long	maxvnodes;
119 	long	numvnodes;
120 	long	freevnodes;
121 	int	numdirtybuffers;
122 } s, s1, s2, z;
123 static u_long kmem_size;
124 static u_int v_page_count;
125 
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 enum divisor { IEC = 0, SI = HN_DIVISOR_1000 };
133 
134 static void allocinfo(struct Info *);
135 static void copyinfo(struct Info *, struct Info *);
136 static float cputime(int);
137 static void do_putuint64(uint64_t, int, int, int, int);
138 static void getinfo(struct Info *);
139 static void putuint64(uint64_t, int, int, int);
140 static int ucount(void);
141 
142 static	int ncpu;
143 static	char buf[26];
144 static	time_t t;
145 static	double etime;
146 static	int nintr;
147 static	long *intrloc;
148 static	char **intrname;
149 static	int nextintsrow;
150 
151 WINDOW *
152 openkre(void)
153 {
154 
155 	return (stdscr);
156 }
157 
158 void
159 closekre(WINDOW *w)
160 {
161 
162 	if (w == NULL)
163 		return;
164 	wclear(w);
165 	wrefresh(w);
166 }
167 
168 /*
169  * These constants define where the major pieces are laid out
170  */
171 #define STATROW		 0	/* uses 1 row and 67 cols */
172 #define STATCOL		 0
173 #define MEMROW		 2	/* uses 4 rows and 45 cols */
174 #define MEMCOL		 0
175 #define PAGEROW		 1	/* uses 4 rows and 30 cols */
176 #define PAGECOL		47
177 #define INTSROW		 5	/* uses all rows to bottom and 16 cols */
178 #define INTSCOL		64
179 #define PROCSROW	 6	/* uses 3 rows and 19 cols */
180 #define PROCSCOL	 0
181 #define GENSTATROW	 7	/* uses 2 rows and 29 cols */
182 #define GENSTATCOL	21
183 #define VMSTATROW	 5	/* uses 17 rows and 12-14 cols */
184 #define VMSTATCOL	49	/* actually 50-51 for some fields */
185 #define GRAPHROW	10	/* uses 3 rows and 49-51 cols */
186 #define GRAPHCOL	 0
187 #define VNSTATROW	13	/* uses 4 rows and 13 columns */
188 #define VNSTATCOL	35
189 #define NAMEIROW	14	/* uses 3 rows and 32 cols */
190 #define NAMEICOL	 0
191 #define DISKROW		18	/* uses 5 rows and 47 cols (for 7 drives) */
192 #define DISKCOL		 0
193 
194 #define	DRIVESPACE	 7	/* max # for space */
195 
196 #define	MAXDRIVES	DRIVESPACE	 /* max # to display */
197 
198 int
199 initkre(void)
200 {
201 	char *cp, *cp1, *cp2, *intrnamebuf, *nextcp;
202 	int i;
203 	size_t sz;
204 
205 	if (dsinit(MAXDRIVES) != 1)
206 		return(0);
207 
208 	if (nintr == 0) {
209 		if (sysctlbyname("hw.intrcnt", NULL, &sz, NULL, 0) == -1) {
210 			error("sysctl(hw.intrcnt...) failed: %s",
211 			      strerror(errno));
212 			return (0);
213 		}
214 		nintr = sz / sizeof(u_long);
215 		intrloc = calloc(nintr, sizeof (long));
216 		intrname = calloc(nintr, sizeof (char *));
217 		intrnamebuf = sysctl_dynread("hw.intrnames", NULL);
218 		if (intrnamebuf == NULL || intrname == NULL ||
219 		    intrloc == NULL) {
220 			error("Out of memory");
221 			if (intrnamebuf)
222 				free(intrnamebuf);
223 			if (intrname)
224 				free(intrname);
225 			if (intrloc)
226 				free(intrloc);
227 			nintr = 0;
228 			return(0);
229 		}
230 		for (cp = intrnamebuf, i = 0; i < nintr; i++) {
231 			nextcp = cp + strlen(cp) + 1;
232 
233 			/* Discard trailing spaces. */
234 			for (cp1 = nextcp - 1; cp1 > cp && *(cp1 - 1) == ' '; )
235 				*--cp1 = '\0';
236 
237 			/* Convert "irqN: name" to "name irqN". */
238 			if (strncmp(cp, "irq", 3) == 0) {
239 				cp1 = cp + 3;
240 				while (isdigit((u_char)*cp1))
241 					cp1++;
242 				if (cp1 != cp && *cp1 == ':' &&
243 				    *(cp1 + 1) == ' ') {
244 					sz = strlen(cp);
245 					*cp1 = '\0';
246 					cp1 = cp1 + 2;
247 					cp2 = strdup(cp);
248 					bcopy(cp1, cp, sz - (cp1 - cp) + 1);
249 					if (sz <= 10 + 4) {
250 						strcat(cp, " ");
251 						strcat(cp, cp2 + 3);
252 					}
253 					free(cp2);
254 				}
255 			}
256 
257 			/*
258 			 * Convert "name irqN" to "name N" if the former is
259 			 * longer than the field width.
260 			 */
261 			if ((cp1 = strstr(cp, "irq")) != NULL &&
262 			    strlen(cp) > 10)
263 				bcopy(cp1 + 3, cp1, strlen(cp1 + 3) + 1);
264 
265 			intrname[i] = cp;
266 			cp = nextcp;
267 		}
268 		nextintsrow = INTSROW + 2;
269 		allocinfo(&s);
270 		allocinfo(&s1);
271 		allocinfo(&s2);
272 		allocinfo(&z);
273 	}
274 	GETSYSCTL("vm.kmem_size", kmem_size);
275 	GETSYSCTL("vm.stats.vm.v_page_count", v_page_count);
276 	getinfo(&s2);
277 	copyinfo(&s2, &s1);
278 	return(1);
279 }
280 
281 void
282 fetchkre(void)
283 {
284 	time_t now;
285 	struct tm *tp;
286 	static int d_first = -1;
287 
288 	if (d_first < 0)
289 		d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
290 
291 	time(&now);
292 	tp = localtime(&now);
293 	(void) strftime(buf, sizeof(buf),
294 			d_first ? "%e %b %R" : "%b %e %R", tp);
295 	getinfo(&s);
296 }
297 
298 void
299 labelkre(void)
300 {
301 	int i, j;
302 
303 	clear();
304 	mvprintw(STATROW, STATCOL + 6, "users    Load");
305 	mvprintw(STATROW + 1, STATCOL + 3, "Mem usage:    %%Phy   %%Kmem");
306 	mvprintw(MEMROW, MEMCOL, "Mem:       REAL            VIRTUAL");
307 	mvprintw(MEMROW + 1, MEMCOL, "        Tot   Share      Tot    Share");
308 	mvprintw(MEMROW + 2, MEMCOL, "Act");
309 	mvprintw(MEMROW + 3, MEMCOL, "All");
310 
311 	mvprintw(MEMROW + 1, MEMCOL + 41, "Free");
312 
313 	mvprintw(PAGEROW, PAGECOL,     "         VN PAGER   SWAP PAGER");
314 	mvprintw(PAGEROW + 1, PAGECOL, "         in   out     in   out");
315 	mvprintw(PAGEROW + 2, PAGECOL, "count");
316 	mvprintw(PAGEROW + 3, PAGECOL, "pages");
317 
318 	mvprintw(INTSROW, INTSCOL + 1, "Interrupts");
319 	mvprintw(INTSROW + 1, INTSCOL + 6, "total");
320 
321 	mvprintw(VMSTATROW, VMSTATCOL + 9, "ioflt");
322 	mvprintw(VMSTATROW + 1, VMSTATCOL + 9, "cow");
323 	mvprintw(VMSTATROW + 2, VMSTATCOL + 9, "zfod");
324 	mvprintw(VMSTATROW + 3, VMSTATCOL + 9, "ozfod");
325 	mvprintw(VMSTATROW + 4, VMSTATCOL + 9 - 1, "%%ozfod");
326 	mvprintw(VMSTATROW + 5, VMSTATCOL + 9, "daefr");
327 	mvprintw(VMSTATROW + 6, VMSTATCOL + 9, "prcfr");
328 	mvprintw(VMSTATROW + 7, VMSTATCOL + 9, "totfr");
329 	mvprintw(VMSTATROW + 8, VMSTATCOL + 9, "react");
330 	mvprintw(VMSTATROW + 9, VMSTATCOL + 9, "pdwak");
331 	mvprintw(VMSTATROW + 10, VMSTATCOL + 9, "pdpgs");
332 	mvprintw(VMSTATROW + 11, VMSTATCOL + 9, "intrn");
333 	mvprintw(VMSTATROW + 12, VMSTATCOL + 9, "wire");
334 	mvprintw(VMSTATROW + 13, VMSTATCOL + 9, "act");
335 	mvprintw(VMSTATROW + 14, VMSTATCOL + 9, "inact");
336 	mvprintw(VMSTATROW + 15, VMSTATCOL + 9, "laund");
337 	mvprintw(VMSTATROW + 16, VMSTATCOL + 9, "free");
338 	if (LINES - 1 > VMSTATROW + 17)
339 		mvprintw(VMSTATROW + 17, VMSTATCOL + 9, "buf");
340 
341 	mvprintw(GENSTATROW, GENSTATCOL, " Csw  Trp  Sys  Int  Sof  Flt");
342 
343 	mvprintw(GRAPHROW, GRAPHCOL,
344 		"  . %%Sys    . %%Intr   . %%User   . %%Nice   . %%Idle");
345 	mvprintw(PROCSROW, PROCSCOL, "Proc:");
346 	mvprintw(PROCSROW + 1, PROCSCOL, "  r   p   d   s   w");
347 	mvprintw(GRAPHROW + 1, GRAPHCOL,
348 		"|    |    |    |    |    |    |    |    |    |    |");
349 
350 	mvprintw(VNSTATROW, VNSTATCOL + 8, "dtbuf");
351 	mvprintw(VNSTATROW + 1, VNSTATCOL + 8, "maxvn");
352 	mvprintw(VNSTATROW + 2, VNSTATCOL + 8, "numvn");
353 	mvprintw(VNSTATROW + 3, VNSTATCOL + 8, "frevn");
354 
355 	mvprintw(NAMEIROW, NAMEICOL, "Namei     Name-cache   Dir-cache");
356 	mvprintw(NAMEIROW + 1, NAMEICOL,
357 		"   Calls    hits   %%    hits   %%");
358 	dslabel(MAXDRIVES, DISKCOL, DISKROW);
359 
360 	for (i = 0; i < nintr; i++) {
361 		if (intrloc[i] == 0)
362 			continue;
363 		mvprintw(intrloc[i], INTSCOL + 6, "%-10.10s", intrname[i]);
364 	}
365 }
366 
367 #define X(fld)	{t=s.fld[i]; s.fld[i]-=s1.fld[i]; if(state==TIME) s1.fld[i]=t;}
368 #define Q(fld)	{t=cur_dev.fld[i]; cur_dev.fld[i]-=last_dev.fld[i]; if(state==TIME) last_dev.fld[i]=t;}
369 #define Y(fld)	{t = s.fld; s.fld -= s1.fld; if(state == TIME) s1.fld = t;}
370 #define Z(fld)	{t = s.nchstats.fld; s.nchstats.fld -= s1.nchstats.fld; \
371 	if(state == TIME) s1.nchstats.fld = t;}
372 #define PUTRATE(fld, l, c, w) \
373 do { \
374 	Y(fld); \
375 	sysputwuint64(wnd, l, c, w, (s.fld/etime + 0.5), 0); \
376 } while (0)
377 #define MAXFAIL 5
378 
379 static	char cpuchar[CPUSTATES] = { '=' , '+', '>', '-', ' ' };
380 static	char cpuorder[CPUSTATES] = { CP_SYS, CP_INTR, CP_USER, CP_NICE,
381 				     CP_IDLE };
382 
383 void
384 showkre(void)
385 {
386 	float f1, f2;
387 	int psiz, inttotal;
388 	int i, l, lc;
389 	static int failcnt = 0;
390 
391 	etime = 0;
392 	for(i = 0; i < CPUSTATES; i++) {
393 		X(time);
394 		Q(cp_time);
395 		etime += s.time[i];
396 	}
397 	if (etime < 5.0) {	/* < 5 ticks - ignore this trash */
398 		if (failcnt++ >= MAXFAIL) {
399 			clear();
400 			mvprintw(2, 10, "The alternate system clock has died!");
401 			mvprintw(3, 10, "Reverting to ``pigs'' display.");
402 			move(CMDLINE, 0);
403 			refresh();
404 			failcnt = 0;
405 			sleep(5);
406 			command("pigs");
407 		}
408 		return;
409 	}
410 	failcnt = 0;
411 	etime /= hertz;
412 	etime /= ncpu;
413 	inttotal = 0;
414 	for (i = 0; i < nintr; i++) {
415 		if (s.intrcnt[i] == 0)
416 			continue;
417 		X(intrcnt);
418 		l = (int)((float)s.intrcnt[i]/etime + 0.5);
419 		inttotal += l;
420 		if (intrloc[i] == 0) {
421 			if (nextintsrow == LINES)
422 				continue;
423 			intrloc[i] = nextintsrow++;
424 			mvprintw(intrloc[i], INTSCOL + 6, "%-10.10s",
425 				intrname[i]);
426 		}
427 		putint(l, intrloc[i], INTSCOL, 5);
428 	}
429 	putint(inttotal, INTSROW + 1, INTSCOL, 5);
430 	Z(ncs_goodhits); Z(ncs_badhits); Z(ncs_miss);
431 	Z(ncs_long); Z(ncs_pass2); Z(ncs_2passes); Z(ncs_neghits);
432 	s.nchcount = nchtotal.ncs_goodhits + nchtotal.ncs_badhits +
433 	    nchtotal.ncs_miss + nchtotal.ncs_long + nchtotal.ncs_neghits;
434 	if (state == TIME)
435 		s1.nchcount = s.nchcount;
436 
437 	psiz = 0;
438 	f2 = 0.0;
439 	for (lc = 0; lc < CPUSTATES; lc++) {
440 		i = cpuorder[lc];
441 		f1 = cputime(i);
442 		f2 += f1;
443 		l = (int) ((f2 + 1.0) / 2.0) - psiz;
444 		putfloat(f1, GRAPHROW, GRAPHCOL + 10 * lc, 4, 1, 0);
445 		move(GRAPHROW + 2, psiz);
446 		psiz += l;
447 		while (l-- > 0)
448 			addch(cpuchar[lc]);
449 	}
450 
451 	putint(ucount(), STATROW, STATCOL, 5);
452 	putfloat(avenrun[0], STATROW, STATCOL + 20, 5, 2, 0);
453 	putfloat(avenrun[1], STATROW, STATCOL + 26, 5, 2, 0);
454 	putfloat(avenrun[2], STATROW, STATCOL + 32, 5, 2, 0);
455 	mvaddstr(STATROW, STATCOL + 55, buf);
456 	putfloat(100.0 * (v_page_count - total.t_free) / v_page_count,
457 	   STATROW + 1, STATCOL + 15, 2, 0, 1);
458 	putfloat(100.0 * s.v_kmem_map_size / kmem_size,
459 	   STATROW + 1, STATCOL + 22, 2, 0, 1);
460 
461 	sysputpage(wnd, MEMROW + 2, MEMCOL + 4, 7, total.t_arm, 0);
462 	sysputpage(wnd, MEMROW + 2, MEMCOL + 12, 7, total.t_armshr, 0);
463 	sysputpage(wnd, MEMROW + 2, MEMCOL + 20, 8, total.t_avm, 0);
464 	sysputpage(wnd, MEMROW + 2, MEMCOL + 29, 8, total.t_avmshr, 0);
465 	sysputpage(wnd, MEMROW + 3, MEMCOL + 4, 7, total.t_rm, 0);
466 	sysputpage(wnd, MEMROW + 3, MEMCOL + 12, 7, total.t_rmshr, 0);
467 	sysputpage(wnd, MEMROW + 3, MEMCOL + 20, 8, total.t_vm, 0);
468 	sysputpage(wnd, MEMROW + 3, MEMCOL + 29, 8, total.t_vmshr, 0);
469 	sysputpage(wnd, MEMROW + 2, MEMCOL + 38, 7, total.t_free, 0);
470 	putint(total.t_rq - 1, PROCSROW + 2, PROCSCOL, 3);
471 	putint(total.t_pw, PROCSROW + 2, PROCSCOL + 4, 3);
472 	putint(total.t_dw, PROCSROW + 2, PROCSCOL + 8, 3);
473 	putint(total.t_sl, PROCSROW + 2, PROCSCOL + 12, 3);
474 	putint(total.t_sw, PROCSROW + 2, PROCSCOL + 16, 3);
475 	PUTRATE(v_io_faults, VMSTATROW, VMSTATCOL + 2, 8 - 2);
476 	PUTRATE(v_cow_faults, VMSTATROW + 1, VMSTATCOL + 2, 8 - 2);
477 	PUTRATE(v_zfod, VMSTATROW + 2, VMSTATCOL + 2, 8 - 2);
478 	PUTRATE(v_ozfod, VMSTATROW + 3, VMSTATCOL, 8);
479 	putint(s.v_zfod != 0 ? (int)(s.v_ozfod * 100.0 / s.v_zfod) : 0,
480 	    VMSTATROW + 4, VMSTATCOL + 1, 8 - 1);
481 	PUTRATE(v_dfree, VMSTATROW + 5, VMSTATCOL + 2, 8 - 2);
482 	PUTRATE(v_pfree, VMSTATROW + 6, VMSTATCOL + 2, 8 - 2);
483 	PUTRATE(v_tfree, VMSTATROW + 7, VMSTATCOL, 8);
484 	PUTRATE(v_reactivated, VMSTATROW + 8, VMSTATCOL, 8);
485 	PUTRATE(v_pdwakeups, VMSTATROW + 9, VMSTATCOL, 8);
486 	PUTRATE(v_pdpages, VMSTATROW + 10, VMSTATCOL, 8);
487 	PUTRATE(v_intrans, VMSTATROW + 11, VMSTATCOL, 8);
488 	sysputpage(wnd, VMSTATROW + 12, VMSTATCOL + 2, 8 - 2, s.v_wire_count, 0);
489 	sysputpage(wnd, VMSTATROW + 13, VMSTATCOL + 2, 8 - 2, s.v_active_count, 0);
490 	sysputpage(wnd, VMSTATROW + 14, VMSTATCOL + 2, 8 - 2, s.v_inactive_count, 0);
491 	sysputpage(wnd, VMSTATROW + 15, VMSTATCOL + 2, 8 - 2, s.v_laundry_count, 0);
492 	sysputpage(wnd, VMSTATROW + 16, VMSTATCOL + 2, 8 - 2, s.v_free_count, 0);
493 	if (LINES - 1 > VMSTATROW + 17)
494 		sysputuint64(wnd, VMSTATROW + 17, VMSTATCOL + 2, 8 - 2, s.bufspace, 0);
495 	PUTRATE(v_vnodein, PAGEROW + 2, PAGECOL + 6, 5);
496 	PUTRATE(v_vnodeout, PAGEROW + 2, PAGECOL + 12, 5);
497 	PUTRATE(v_swapin, PAGEROW + 2, PAGECOL + 19, 5);
498 	PUTRATE(v_swapout, PAGEROW + 2, PAGECOL + 25, 5);
499 	PUTRATE(v_vnodepgsin, PAGEROW + 3, PAGECOL + 6, 5);
500 	PUTRATE(v_vnodepgsout, PAGEROW + 3, PAGECOL + 12, 5);
501 	PUTRATE(v_swappgsin, PAGEROW + 3, PAGECOL + 19, 5);
502 	PUTRATE(v_swappgsout, PAGEROW + 3, PAGECOL + 25, 5);
503 	PUTRATE(v_swtch, GENSTATROW + 1, GENSTATCOL, 4);
504 	PUTRATE(v_trap, GENSTATROW + 1, GENSTATCOL + 5, 4);
505 	PUTRATE(v_syscall, GENSTATROW + 1, GENSTATCOL + 10, 4);
506 	PUTRATE(v_intr, GENSTATROW + 1, GENSTATCOL + 15, 4);
507 	PUTRATE(v_soft, GENSTATROW + 1, GENSTATCOL + 20, 4);
508 	PUTRATE(v_vm_faults, GENSTATROW + 1, GENSTATCOL + 25, 4);
509 	switch(state) {
510 	case TIME:
511 		dsshow(MAXDRIVES, DISKCOL, DISKROW, &cur_dev, &last_dev);
512 		break;
513 	case RUN:
514 		dsshow(MAXDRIVES, DISKCOL, DISKROW, &cur_dev, &run_dev);
515 		break;
516 	case BOOT:
517 		dsshow(MAXDRIVES, DISKCOL, DISKROW, &cur_dev, NULL);
518 		break;
519 	}
520 	putint(s.numdirtybuffers, VNSTATROW, VNSTATCOL, 7);
521 	putint(s.maxvnodes, VNSTATROW + 1, VNSTATCOL, 7);
522 	putint(s.numvnodes, VNSTATROW + 2, VNSTATCOL, 7);
523 	putint(s.freevnodes, VNSTATROW + 3, VNSTATCOL, 7);
524 	putint(s.nchcount, NAMEIROW + 2, NAMEICOL, 8);
525 	putint((nchtotal.ncs_goodhits + nchtotal.ncs_neghits),
526 	   NAMEIROW + 2, NAMEICOL + 9, 7);
527 #define nz(x)	((x) ? (x) : 1)
528 	putfloat((nchtotal.ncs_goodhits+nchtotal.ncs_neghits) *
529 	   100.0 / nz(s.nchcount),
530 	   NAMEIROW + 2, NAMEICOL + 17, 3, 0, 1);
531 	putint(nchtotal.ncs_pass2, NAMEIROW + 2, NAMEICOL + 21, 7);
532 	putfloat(nchtotal.ncs_pass2 * 100.0 / nz(s.nchcount),
533 	   NAMEIROW + 2, NAMEICOL + 29, 3, 0, 1);
534 #undef nz
535 }
536 
537 int
538 cmdkre(const char *cmd, const char *args)
539 {
540 	int retval;
541 
542 	if (prefix(cmd, "run")) {
543 		retval = 1;
544 		copyinfo(&s2, &s1);
545 		switch (devstat_getdevs(NULL, &run_dev)) {
546 		case -1:
547 			errx(1, "%s", devstat_errbuf);
548 			break;
549 		case 1:
550 			num_devices = run_dev.dinfo->numdevs;
551 			generation = run_dev.dinfo->generation;
552 			retval = dscmd("refresh", NULL, MAXDRIVES, &cur_dev);
553 			if (retval == 2)
554 				labelkre();
555 			break;
556 		default:
557 			break;
558 		}
559 		state = RUN;
560 		return (retval);
561 	}
562 	if (prefix(cmd, "boot")) {
563 		state = BOOT;
564 		copyinfo(&z, &s1);
565 		return (1);
566 	}
567 	if (prefix(cmd, "time")) {
568 		state = TIME;
569 		return (1);
570 	}
571 	if (prefix(cmd, "zero")) {
572 		retval = 1;
573 		if (state == RUN) {
574 			getinfo(&s1);
575 			switch (devstat_getdevs(NULL, &run_dev)) {
576 			case -1:
577 				errx(1, "%s", devstat_errbuf);
578 				break;
579 			case 1:
580 				num_devices = run_dev.dinfo->numdevs;
581 				generation = run_dev.dinfo->generation;
582 				retval = dscmd("refresh",NULL, MAXDRIVES, &cur_dev);
583 				if (retval == 2)
584 					labelkre();
585 				break;
586 			default:
587 				break;
588 			}
589 		}
590 		return (retval);
591 	}
592 	retval = dscmd(cmd, args, MAXDRIVES, &cur_dev);
593 
594 	if (retval == 2)
595 		labelkre();
596 
597 	return(retval);
598 }
599 
600 /* calculate number of users on the system */
601 static int
602 ucount(void)
603 {
604 	int nusers = 0;
605 	struct utmpx *ut;
606 
607 	setutxent();
608 	while ((ut = getutxent()) != NULL)
609 		if (ut->ut_type == USER_PROCESS)
610 			nusers++;
611 	endutxent();
612 
613 	return (nusers);
614 }
615 
616 static float
617 cputime(int indx)
618 {
619 	double lt;
620 	int i;
621 
622 	lt = 0;
623 	for (i = 0; i < CPUSTATES; i++)
624 		lt += s.time[i];
625 	if (lt == 0.0)
626 		lt = 1.0;
627 	return (s.time[indx] * 100.0 / lt);
628 }
629 
630 void
631 putint(int n, int l, int lc, int w)
632 {
633 
634 	do_putuint64(n, l, lc, w, SI);
635 }
636 
637 static void
638 putuint64(uint64_t n, int l, int lc, int w)
639 {
640 
641 	do_putuint64(n, l, lc, w, IEC);
642 }
643 
644 static void
645 do_putuint64(uint64_t n, int l, int lc, int w, int div)
646 {
647 	int snr;
648 	char b[128];
649 	char buf[128];
650 
651 	move(l, lc);
652 #ifdef DEBUG
653 		while (w-- > 0)
654 			addch('*');
655 		return;
656 #endif
657 	if (n == 0) {
658 		while (w-- > 0)
659 			addch(' ');
660 		return;
661 	}
662 	snr = snprintf(b, sizeof(b), "%*ju", w, (uintmax_t)n);
663 	if (snr != w) {
664 		humanize_number(buf, w, n, "", HN_AUTOSCALE,
665 		    HN_NOSPACE | HN_DECIMAL | div);
666 		snr = snprintf(b, sizeof(b), "%*s", w, buf);
667 	}
668 	if (snr != w) {
669 		while (w-- > 0)
670 			addch('*');
671 		return;
672 	}
673 	addstr(b);
674 }
675 
676 void
677 putfloat(double f, int l, int lc, int w, int d, int nz)
678 {
679 	int snr;
680 	char b[128];
681 
682 	move(l, lc);
683 #ifdef DEBUG
684 		while (--w >= 0)
685 			addch('*');
686 		return;
687 #endif
688 	if (nz && f == 0.0) {
689 		while (--w >= 0)
690 			addch(' ');
691 		return;
692 	}
693 	snr = snprintf(b, sizeof(b), "%*.*f", w, d, f);
694 	if (snr != w)
695 		snr = snprintf(b, sizeof(b), "%*.0f", w, f);
696 	if (snr != w)
697 		snr = snprintf(b, sizeof(b), "%*.0fk", w - 1, f / 1000);
698 	if (snr != w)
699 		snr = snprintf(b, sizeof(b), "%*.0fM", w - 1, f / 1000000);
700 	if (snr != w) {
701 		while (--w >= 0)
702 			addch('*');
703 		return;
704 	}
705 	addstr(b);
706 }
707 
708 void
709 putlongdouble(long double f, int l, int lc, int w, int d, int nz)
710 {
711 	int snr;
712 	char b[128];
713 
714 	move(l, lc);
715 #ifdef DEBUG
716 		while (--w >= 0)
717 			addch('*');
718 		return;
719 #endif
720 	if (nz && f == 0.0) {
721 		while (--w >= 0)
722 			addch(' ');
723 		return;
724 	}
725 	snr = snprintf(b, sizeof(b), "%*.*Lf", w, d, f);
726 	if (snr != w)
727 		snr = snprintf(b, sizeof(b), "%*.0Lf", w, f);
728 	if (snr != w)
729 		snr = snprintf(b, sizeof(b), "%*.0Lfk", w - 1, f / 1000);
730 	if (snr != w)
731 		snr = snprintf(b, sizeof(b), "%*.0LfM", w - 1, f / 1000000);
732 	if (snr != w) {
733 		while (--w >= 0)
734 			addch('*');
735 		return;
736 	}
737 	addstr(b);
738 }
739 
740 static void
741 getinfo(struct Info *ls)
742 {
743 	struct devinfo *tmp_dinfo;
744 	size_t size;
745 	int mib[2];
746 
747 	GETSYSCTL("kern.cp_time", ls->time);
748 	GETSYSCTL("kern.cp_time", cur_dev.cp_time);
749 	GETSYSCTL("vm.stats.sys.v_swtch", ls->v_swtch);
750 	GETSYSCTL("vm.stats.sys.v_trap", ls->v_trap);
751 	GETSYSCTL("vm.stats.sys.v_syscall", ls->v_syscall);
752 	GETSYSCTL("vm.stats.sys.v_intr", ls->v_intr);
753 	GETSYSCTL("vm.stats.sys.v_soft", ls->v_soft);
754 	GETSYSCTL("vm.stats.vm.v_vm_faults", ls->v_vm_faults);
755 	GETSYSCTL("vm.stats.vm.v_io_faults", ls->v_io_faults);
756 	GETSYSCTL("vm.stats.vm.v_cow_faults", ls->v_cow_faults);
757 	GETSYSCTL("vm.stats.vm.v_zfod", ls->v_zfod);
758 	GETSYSCTL("vm.stats.vm.v_ozfod", ls->v_ozfod);
759 	GETSYSCTL("vm.stats.vm.v_swapin", ls->v_swapin);
760 	GETSYSCTL("vm.stats.vm.v_swapout", ls->v_swapout);
761 	GETSYSCTL("vm.stats.vm.v_swappgsin", ls->v_swappgsin);
762 	GETSYSCTL("vm.stats.vm.v_swappgsout", ls->v_swappgsout);
763 	GETSYSCTL("vm.stats.vm.v_vnodein", ls->v_vnodein);
764 	GETSYSCTL("vm.stats.vm.v_vnodeout", ls->v_vnodeout);
765 	GETSYSCTL("vm.stats.vm.v_vnodepgsin", ls->v_vnodepgsin);
766 	GETSYSCTL("vm.stats.vm.v_vnodepgsout", ls->v_vnodepgsout);
767 	GETSYSCTL("vm.stats.vm.v_intrans", ls->v_intrans);
768 	GETSYSCTL("vm.stats.vm.v_reactivated", ls->v_reactivated);
769 	GETSYSCTL("vm.stats.vm.v_pdwakeups", ls->v_pdwakeups);
770 	GETSYSCTL("vm.stats.vm.v_pdpages", ls->v_pdpages);
771 	GETSYSCTL("vm.stats.vm.v_dfree", ls->v_dfree);
772 	GETSYSCTL("vm.stats.vm.v_pfree", ls->v_pfree);
773 	GETSYSCTL("vm.stats.vm.v_tfree", ls->v_tfree);
774 	GETSYSCTL("vm.stats.vm.v_free_count", ls->v_free_count);
775 	GETSYSCTL("vm.stats.vm.v_wire_count", ls->v_wire_count);
776 	GETSYSCTL("vm.stats.vm.v_active_count", ls->v_active_count);
777 	GETSYSCTL("vm.stats.vm.v_inactive_count", ls->v_inactive_count);
778 	GETSYSCTL("vm.stats.vm.v_laundry_count", ls->v_laundry_count);
779 	GETSYSCTL("vfs.bufspace", ls->bufspace);
780 	GETSYSCTL("kern.maxvnodes", ls->maxvnodes);
781 	GETSYSCTL("vfs.numvnodes", ls->numvnodes);
782 	GETSYSCTL("vfs.freevnodes", ls->freevnodes);
783 	GETSYSCTL("vfs.cache.nchstats", ls->nchstats);
784 	GETSYSCTL("vfs.numdirtybuffers", ls->numdirtybuffers);
785 	GETSYSCTL("vm.kmem_map_size", ls->v_kmem_map_size);
786 	getsysctl("hw.intrcnt", ls->intrcnt, nintr * sizeof(u_long));
787 
788 	size = sizeof(ls->Total);
789 	mib[0] = CTL_VM;
790 	mib[1] = VM_TOTAL;
791 	if (sysctl(mib, 2, &ls->Total, &size, NULL, 0) < 0) {
792 		error("Can't get kernel info: %s\n", strerror(errno));
793 		bzero(&ls->Total, sizeof(ls->Total));
794 	}
795 	size = sizeof(ncpu);
796 	if (sysctlbyname("hw.ncpu", &ncpu, &size, NULL, 0) < 0 ||
797 	    size != sizeof(ncpu))
798 		ncpu = 1;
799 
800 	tmp_dinfo = last_dev.dinfo;
801 	last_dev.dinfo = cur_dev.dinfo;
802 	cur_dev.dinfo = tmp_dinfo;
803 
804 	last_dev.snap_time = cur_dev.snap_time;
805 	dsgetinfo(&cur_dev);
806 }
807 
808 static void
809 allocinfo(struct Info *ls)
810 {
811 
812 	ls->intrcnt = (long *) calloc(nintr, sizeof(long));
813 	if (ls->intrcnt == NULL)
814 		errx(2, "out of memory");
815 }
816 
817 static void
818 copyinfo(struct Info *from, struct Info *to)
819 {
820 	long *intrcnt;
821 
822 	/*
823 	 * time, wds, seek, and xfer are malloc'd so we have to
824 	 * save the pointers before the structure copy and then
825 	 * copy by hand.
826 	 */
827 	intrcnt = to->intrcnt;
828 	*to = *from;
829 
830 	bcopy(from->intrcnt, to->intrcnt = intrcnt, nintr * sizeof (int));
831 }
832