xref: /freebsd/usr.bin/systat/vmstat.c (revision 814bd1ed438f7dfc5bedcb1f3e772a46fe7026bb)
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 int ucount(void);
140 
141 static	int ncpu;
142 static	char buf[26];
143 static	time_t t;
144 static	double etime;
145 static	int nintr;
146 static	long *intrloc;
147 static	char **intrname;
148 static	int nextintsrow;
149 
150 WINDOW *
151 openkre(void)
152 {
153 
154 	return (stdscr);
155 }
156 
157 void
158 closekre(WINDOW *w)
159 {
160 
161 	if (w == NULL)
162 		return;
163 	wclear(w);
164 	wrefresh(w);
165 }
166 
167 /*
168  * These constants define where the major pieces are laid out
169  */
170 #define STATROW		 0	/* uses 1 row and 67 cols */
171 #define STATCOL		 0
172 #define MEMROW		 2	/* uses 4 rows and 45 cols */
173 #define MEMCOL		 0
174 #define PAGEROW		 1	/* uses 4 rows and 30 cols */
175 #define PAGECOL		47
176 #define INTSROW		 5	/* uses all rows to bottom and 16 cols */
177 #define INTSCOL		64
178 #define PROCSROW	 6	/* uses 3 rows and 20 cols */
179 #define PROCSCOL	 0
180 #define GENSTATROW	 7	/* uses 2 rows and 29 cols */
181 #define GENSTATCOL	22
182 #define VMSTATROW	 5	/* uses 17 rows and 12-14 cols */
183 #define VMSTATCOL	52
184 #define GRAPHROW	10	/* uses 3 rows and 49-51 cols */
185 #define GRAPHCOL	 0
186 #define VNSTATROW	13	/* uses 4 rows and 13 columns */
187 #define VNSTATCOL	35
188 #define NAMEIROW	14	/* uses 3 rows and 32 cols */
189 #define NAMEICOL	 0
190 #define DISKROW		18	/* uses 5 rows and 47 cols (for 7 drives) */
191 #define DISKCOL		 0
192 
193 #define	DRIVESPACE	 7	/* max # for space */
194 
195 #define	MAXDRIVES	DRIVESPACE	 /* max # to display */
196 
197 int
198 initkre(void)
199 {
200 	char *cp, *cp1, *cp2, *intrnamebuf, *nextcp;
201 	int i;
202 	size_t sz;
203 
204 	if (dsinit(MAXDRIVES) != 1)
205 		return(0);
206 
207 	if (nintr == 0) {
208 		if (sysctlbyname("hw.intrcnt", NULL, &sz, NULL, 0) == -1) {
209 			error("sysctl(hw.intrcnt...) failed: %s",
210 			      strerror(errno));
211 			return (0);
212 		}
213 		nintr = sz / sizeof(u_long);
214 		intrloc = calloc(nintr, sizeof (long));
215 		intrname = calloc(nintr, sizeof (char *));
216 		intrnamebuf = sysctl_dynread("hw.intrnames", NULL);
217 		if (intrnamebuf == NULL || intrname == NULL ||
218 		    intrloc == NULL) {
219 			error("Out of memory");
220 			if (intrnamebuf)
221 				free(intrnamebuf);
222 			if (intrname)
223 				free(intrname);
224 			if (intrloc)
225 				free(intrloc);
226 			nintr = 0;
227 			return(0);
228 		}
229 		for (cp = intrnamebuf, i = 0; i < nintr; i++) {
230 			nextcp = cp + strlen(cp) + 1;
231 
232 			/* Discard trailing spaces. */
233 			for (cp1 = nextcp - 1; cp1 > cp && *(cp1 - 1) == ' '; )
234 				*--cp1 = '\0';
235 
236 			/* Convert "irqN: name" to "name irqN". */
237 			if (strncmp(cp, "irq", 3) == 0) {
238 				cp1 = cp + 3;
239 				while (isdigit((u_char)*cp1))
240 					cp1++;
241 				if (cp1 != cp && *cp1 == ':' &&
242 				    *(cp1 + 1) == ' ') {
243 					sz = strlen(cp);
244 					*cp1 = '\0';
245 					cp1 = cp1 + 2;
246 					cp2 = strdup(cp);
247 					bcopy(cp1, cp, sz - (cp1 - cp) + 1);
248 					if (sz <= 10 + 4) {
249 						strcat(cp, " ");
250 						strcat(cp, cp2 + 3);
251 					}
252 					free(cp2);
253 				}
254 			}
255 
256 			/*
257 			 * Convert "name irqN" to "name N" if the former is
258 			 * longer than the field width.
259 			 */
260 			if ((cp1 = strstr(cp, "irq")) != NULL &&
261 			    strlen(cp) > 10)
262 				bcopy(cp1 + 3, cp1, strlen(cp1 + 3) + 1);
263 
264 			intrname[i] = cp;
265 			cp = nextcp;
266 		}
267 		nextintsrow = INTSROW + 2;
268 		allocinfo(&s);
269 		allocinfo(&s1);
270 		allocinfo(&s2);
271 		allocinfo(&z);
272 	}
273 	GETSYSCTL("vm.kmem_size", kmem_size);
274 	GETSYSCTL("vm.stats.vm.v_page_count", v_page_count);
275 	getinfo(&s2);
276 	copyinfo(&s2, &s1);
277 	return(1);
278 }
279 
280 void
281 fetchkre(void)
282 {
283 	time_t now;
284 	struct tm *tp;
285 	static int d_first = -1;
286 
287 	if (d_first < 0)
288 		d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
289 
290 	time(&now);
291 	tp = localtime(&now);
292 	(void) strftime(buf, sizeof(buf),
293 			d_first ? "%e %b %T" : "%b %e %T", tp);
294 	getinfo(&s);
295 }
296 
297 void
298 labelkre(void)
299 {
300 	int i;
301 
302 	clear();
303 	mvprintw(STATROW, STATCOL + 6, "users    Load");
304 	mvprintw(STATROW + 1, STATCOL + 3, "Mem usage:    %%Phy   %%Kmem");
305 	mvprintw(MEMROW, MEMCOL, "Mem:      REAL           VIRTUAL");
306 	mvprintw(MEMROW + 1, MEMCOL, "       Tot   Share     Tot    Share");
307 	mvprintw(MEMROW + 2, MEMCOL, "Act");
308 	mvprintw(MEMROW + 3, MEMCOL, "All");
309 
310 	mvprintw(MEMROW + 1, MEMCOL + 40, "Free");
311 
312 	mvprintw(PAGEROW, PAGECOL,     "         VN PAGER   SWAP PAGER");
313 	mvprintw(PAGEROW + 1, PAGECOL, "         in   out     in   out");
314 	mvprintw(PAGEROW + 2, PAGECOL, "count");
315 	mvprintw(PAGEROW + 3, PAGECOL, "pages");
316 
317 	mvprintw(INTSROW, INTSCOL + 1, "Interrupts");
318 	mvprintw(INTSROW + 1, INTSCOL + 6, "total");
319 
320 	mvprintw(VMSTATROW, VMSTATCOL + 6, "ioflt");
321 	mvprintw(VMSTATROW + 1, VMSTATCOL + 6, "cow");
322 	mvprintw(VMSTATROW + 2, VMSTATCOL + 6, "zfod");
323 	mvprintw(VMSTATROW + 3, VMSTATCOL + 6, "ozfod");
324 	mvprintw(VMSTATROW + 4, VMSTATCOL + 6 - 1, "%%ozfod");
325 	mvprintw(VMSTATROW + 5, VMSTATCOL + 6, "daefr");
326 	mvprintw(VMSTATROW + 6, VMSTATCOL + 6, "prcfr");
327 	mvprintw(VMSTATROW + 7, VMSTATCOL + 6, "totfr");
328 	mvprintw(VMSTATROW + 8, VMSTATCOL + 6, "react");
329 	mvprintw(VMSTATROW + 9, VMSTATCOL + 6, "pdwak");
330 	mvprintw(VMSTATROW + 10, VMSTATCOL + 6, "pdpgs");
331 	mvprintw(VMSTATROW + 11, VMSTATCOL + 6, "intrn");
332 	mvprintw(VMSTATROW + 12, VMSTATCOL + 6, "wire");
333 	mvprintw(VMSTATROW + 13, VMSTATCOL + 6, "act");
334 	mvprintw(VMSTATROW + 14, VMSTATCOL + 6, "inact");
335 	mvprintw(VMSTATROW + 15, VMSTATCOL + 6, "laund");
336 	mvprintw(VMSTATROW + 16, VMSTATCOL + 6, "free");
337 	if (LINES - 1 > VMSTATROW + 17)
338 		mvprintw(VMSTATROW + 17, VMSTATCOL + 6, "buf");
339 
340 	mvprintw(GENSTATROW, GENSTATCOL, " Csw  Trp  Sys  Int  Sof  Flt");
341 
342 	mvprintw(GRAPHROW, GRAPHCOL,
343 		"  . %%Sys    . %%Intr   . %%User   . %%Nice   . %%Idle");
344 	mvprintw(PROCSROW, PROCSCOL, "Proc:");
345 	mvprintw(PROCSROW + 1, PROCSCOL, "  r   p   d    s   w");
346 	mvprintw(GRAPHROW + 1, GRAPHCOL,
347 		"|    |    |    |    |    |    |    |    |    |    |");
348 
349 	mvprintw(VNSTATROW, VNSTATCOL + 8, "dtbuf");
350 	mvprintw(VNSTATROW + 1, VNSTATCOL + 8, "maxvn");
351 	mvprintw(VNSTATROW + 2, VNSTATCOL + 8, "numvn");
352 	mvprintw(VNSTATROW + 3, VNSTATCOL + 8, "frevn");
353 
354 	mvprintw(NAMEIROW, NAMEICOL, "Namei     Name-cache   Dir-cache");
355 	mvprintw(NAMEIROW + 1, NAMEICOL,
356 		"   Calls    hits   %%    hits   %%");
357 	dslabel(MAXDRIVES, DISKCOL, DISKROW);
358 
359 	for (i = 0; i < nintr; i++) {
360 		if (intrloc[i] == 0)
361 			continue;
362 		mvprintw(intrloc[i], INTSCOL + 6, "%-10.10s", intrname[i]);
363 	}
364 }
365 
366 #define X(fld)	{t=s.fld[i]; s.fld[i]-=s1.fld[i]; if(state==TIME) s1.fld[i]=t;}
367 #define Q(fld)	{t=cur_dev.fld[i]; cur_dev.fld[i]-=last_dev.fld[i]; if(state==TIME) last_dev.fld[i]=t;}
368 #define Y(fld)	{t = s.fld; s.fld -= s1.fld; if(state == TIME) s1.fld = t;}
369 #define Z(fld)	{t = s.nchstats.fld; s.nchstats.fld -= s1.nchstats.fld; \
370 	if(state == TIME) s1.nchstats.fld = t;}
371 #define PUTRATE(fld, l, c, w) \
372 do { \
373 	Y(fld); \
374 	sysputwuint64(wnd, l, c, w, (s.fld/etime + 0.5), 0); \
375 } while (0)
376 #define MAXFAIL 5
377 
378 static	char cpuchar[CPUSTATES] = { '=' , '+', '>', '-', ' ' };
379 static	char cpuorder[CPUSTATES] = { CP_SYS, CP_INTR, CP_USER, CP_NICE,
380 				     CP_IDLE };
381 
382 void
383 showkre(void)
384 {
385 	float f1, f2;
386 	int psiz, inttotal;
387 	int i, l, lc;
388 	static int failcnt = 0;
389 
390 	etime = 0;
391 	for(i = 0; i < CPUSTATES; i++) {
392 		X(time);
393 		Q(cp_time);
394 		etime += s.time[i];
395 	}
396 	if (etime < 5.0) {	/* < 5 ticks - ignore this trash */
397 		if (failcnt++ >= MAXFAIL) {
398 			clear();
399 			mvprintw(2, 10, "The alternate system clock has died!");
400 			mvprintw(3, 10, "Reverting to ``pigs'' display.");
401 			move(CMDLINE, 0);
402 			refresh();
403 			failcnt = 0;
404 			sleep(5);
405 			command("pigs");
406 		}
407 		return;
408 	}
409 	failcnt = 0;
410 	etime /= hertz;
411 	etime /= ncpu;
412 	inttotal = 0;
413 	for (i = 0; i < nintr; i++) {
414 		if (s.intrcnt[i] == 0)
415 			continue;
416 		X(intrcnt);
417 		l = (int)((float)s.intrcnt[i]/etime + 0.5);
418 		inttotal += l;
419 		if (intrloc[i] == 0) {
420 			if (nextintsrow == LINES)
421 				continue;
422 			intrloc[i] = nextintsrow++;
423 			mvprintw(intrloc[i], INTSCOL + 6, "%-10.10s",
424 				intrname[i]);
425 		}
426 		putint(l, intrloc[i], INTSCOL, 5);
427 	}
428 	putint(inttotal, INTSROW + 1, INTSCOL, 5);
429 	Z(ncs_goodhits); Z(ncs_badhits); Z(ncs_miss);
430 	Z(ncs_long); Z(ncs_pass2); Z(ncs_2passes); Z(ncs_neghits);
431 	s.nchcount = nchtotal.ncs_goodhits + nchtotal.ncs_badhits +
432 	    nchtotal.ncs_miss + nchtotal.ncs_long + nchtotal.ncs_neghits;
433 	if (state == TIME)
434 		s1.nchcount = s.nchcount;
435 
436 	psiz = 0;
437 	f2 = 0.0;
438 	for (lc = 0; lc < CPUSTATES; lc++) {
439 		i = cpuorder[lc];
440 		f1 = cputime(i);
441 		f2 += f1;
442 		l = (int) ((f2 + 1.0) / 2.0) - psiz;
443 		putfloat(f1, GRAPHROW, GRAPHCOL + 10 * lc, 4, 1, 0);
444 		move(GRAPHROW + 2, psiz);
445 		psiz += l;
446 		while (l-- > 0)
447 			addch(cpuchar[lc]);
448 	}
449 
450 	putint(ucount(), STATROW, STATCOL, 5);
451 	putfloat(avenrun[0], STATROW, STATCOL + 20, 5, 2, 0);
452 	putfloat(avenrun[1], STATROW, STATCOL + 26, 5, 2, 0);
453 	putfloat(avenrun[2], STATROW, STATCOL + 32, 5, 2, 0);
454 	mvaddstr(STATROW, STATCOL + 55, buf);
455 	putfloat(100.0 * (v_page_count - total.t_free) / v_page_count,
456 	   STATROW + 1, STATCOL + 15, 2, 0, 1);
457 	putfloat(100.0 * s.v_kmem_map_size / kmem_size,
458 	   STATROW + 1, STATCOL + 22, 2, 0, 1);
459 
460 	sysputpage(wnd, MEMROW + 2, MEMCOL + 4, 6, total.t_arm, 0);
461 	sysputpage(wnd, MEMROW + 2, MEMCOL + 12, 6, total.t_armshr, 0);
462 	sysputpage(wnd, MEMROW + 2, MEMCOL + 20, 6, total.t_avm, 0);
463 	sysputpage(wnd, MEMROW + 2, MEMCOL + 29, 6, total.t_avmshr, 0);
464 	sysputpage(wnd, MEMROW + 3, MEMCOL + 4, 6, total.t_rm, 0);
465 	sysputpage(wnd, MEMROW + 3, MEMCOL + 12, 6, total.t_rmshr, 0);
466 	sysputpage(wnd, MEMROW + 3, MEMCOL + 20, 6, total.t_vm, 0);
467 	sysputpage(wnd, MEMROW + 3, MEMCOL + 29, 6, total.t_vmshr, 0);
468 	sysputpage(wnd, MEMROW + 2, MEMCOL + 38, 6, total.t_free, 0);
469 	putint(total.t_rq - 1, PROCSROW + 2, PROCSCOL, 3);
470 	putint(total.t_pw, PROCSROW + 2, PROCSCOL + 4, 3);
471 	putint(total.t_dw, PROCSROW + 2, PROCSCOL + 8, 3);
472 	putint(total.t_sl, PROCSROW + 2, PROCSCOL + 12, 4);
473 	putint(total.t_sw, PROCSROW + 2, PROCSCOL + 17, 3);
474 	PUTRATE(v_io_faults, VMSTATROW, VMSTATCOL, 5);
475 	PUTRATE(v_cow_faults, VMSTATROW + 1, VMSTATCOL, 5);
476 	PUTRATE(v_zfod, VMSTATROW + 2, VMSTATCOL, 5);
477 	PUTRATE(v_ozfod, VMSTATROW + 3, VMSTATCOL, 5);
478 	putint(s.v_zfod != 0 ? (int)(s.v_ozfod * 100.0 / s.v_zfod) : 0,
479 	    VMSTATROW + 4, VMSTATCOL, 5);
480 	PUTRATE(v_dfree, VMSTATROW + 5, VMSTATCOL, 5);
481 	PUTRATE(v_pfree, VMSTATROW + 6, VMSTATCOL, 5);
482 	PUTRATE(v_tfree, VMSTATROW + 7, VMSTATCOL, 5);
483 	PUTRATE(v_reactivated, VMSTATROW + 8, VMSTATCOL, 5);
484 	PUTRATE(v_pdwakeups, VMSTATROW + 9, VMSTATCOL, 5);
485 	PUTRATE(v_pdpages, VMSTATROW + 10, VMSTATCOL, 5);
486 	PUTRATE(v_intrans, VMSTATROW + 11, VMSTATCOL, 5);
487 	sysputpage(wnd, VMSTATROW + 12, VMSTATCOL, 5, s.v_wire_count, 0);
488 	sysputpage(wnd, VMSTATROW + 13, VMSTATCOL, 5, s.v_active_count, 0);
489 	sysputpage(wnd, VMSTATROW + 14, VMSTATCOL, 5, s.v_inactive_count, 0);
490 	sysputpage(wnd, VMSTATROW + 15, VMSTATCOL, 5, s.v_laundry_count, 0);
491 	sysputpage(wnd, VMSTATROW + 16, VMSTATCOL, 5, s.v_free_count, 0);
492 	if (LINES - 1 > VMSTATROW + 17)
493 		sysputuint64(wnd, VMSTATROW + 17, VMSTATCOL, 5, s.bufspace, 0);
494 	PUTRATE(v_vnodein, PAGEROW + 2, PAGECOL + 6, 5);
495 	PUTRATE(v_vnodeout, PAGEROW + 2, PAGECOL + 12, 5);
496 	PUTRATE(v_swapin, PAGEROW + 2, PAGECOL + 19, 5);
497 	PUTRATE(v_swapout, PAGEROW + 2, PAGECOL + 25, 5);
498 	PUTRATE(v_vnodepgsin, PAGEROW + 3, PAGECOL + 6, 5);
499 	PUTRATE(v_vnodepgsout, PAGEROW + 3, PAGECOL + 12, 5);
500 	PUTRATE(v_swappgsin, PAGEROW + 3, PAGECOL + 19, 5);
501 	PUTRATE(v_swappgsout, PAGEROW + 3, PAGECOL + 25, 5);
502 	PUTRATE(v_swtch, GENSTATROW + 1, GENSTATCOL, 4);
503 	PUTRATE(v_trap, GENSTATROW + 1, GENSTATCOL + 5, 4);
504 	PUTRATE(v_syscall, GENSTATROW + 1, GENSTATCOL + 10, 4);
505 	PUTRATE(v_intr, GENSTATROW + 1, GENSTATCOL + 15, 4);
506 	PUTRATE(v_soft, GENSTATROW + 1, GENSTATCOL + 20, 4);
507 	PUTRATE(v_vm_faults, GENSTATROW + 1, GENSTATCOL + 25, 4);
508 	switch(state) {
509 	case TIME:
510 		dsshow(MAXDRIVES, DISKCOL, DISKROW, &cur_dev, &last_dev);
511 		break;
512 	case RUN:
513 		dsshow(MAXDRIVES, DISKCOL, DISKROW, &cur_dev, &run_dev);
514 		break;
515 	case BOOT:
516 		dsshow(MAXDRIVES, DISKCOL, DISKROW, &cur_dev, NULL);
517 		break;
518 	}
519 	putint(s.numdirtybuffers, VNSTATROW, VNSTATCOL, 7);
520 	putint(s.maxvnodes, VNSTATROW + 1, VNSTATCOL, 7);
521 	putint(s.numvnodes, VNSTATROW + 2, VNSTATCOL, 7);
522 	putint(s.freevnodes, VNSTATROW + 3, VNSTATCOL, 7);
523 	putint(s.nchcount, NAMEIROW + 2, NAMEICOL, 8);
524 	putint((nchtotal.ncs_goodhits + nchtotal.ncs_neghits),
525 	   NAMEIROW + 2, NAMEICOL + 9, 7);
526 #define nz(x)	((x) ? (x) : 1)
527 	putfloat((nchtotal.ncs_goodhits+nchtotal.ncs_neghits) *
528 	   100.0 / nz(s.nchcount),
529 	   NAMEIROW + 2, NAMEICOL + 17, 3, 0, 1);
530 	putint(nchtotal.ncs_pass2, NAMEIROW + 2, NAMEICOL + 21, 7);
531 	putfloat(nchtotal.ncs_pass2 * 100.0 / nz(s.nchcount),
532 	   NAMEIROW + 2, NAMEICOL + 29, 3, 0, 1);
533 #undef nz
534 }
535 
536 int
537 cmdkre(const char *cmd, const char *args)
538 {
539 	int retval;
540 
541 	if (prefix(cmd, "run")) {
542 		retval = 1;
543 		copyinfo(&s2, &s1);
544 		switch (devstat_getdevs(NULL, &run_dev)) {
545 		case -1:
546 			errx(1, "%s", devstat_errbuf);
547 			break;
548 		case 1:
549 			num_devices = run_dev.dinfo->numdevs;
550 			generation = run_dev.dinfo->generation;
551 			retval = dscmd("refresh", NULL, MAXDRIVES, &cur_dev);
552 			if (retval == 2)
553 				labelkre();
554 			break;
555 		default:
556 			break;
557 		}
558 		state = RUN;
559 		return (retval);
560 	}
561 	if (prefix(cmd, "boot")) {
562 		state = BOOT;
563 		copyinfo(&z, &s1);
564 		return (1);
565 	}
566 	if (prefix(cmd, "time")) {
567 		state = TIME;
568 		return (1);
569 	}
570 	if (prefix(cmd, "zero")) {
571 		retval = 1;
572 		if (state == RUN) {
573 			getinfo(&s1);
574 			switch (devstat_getdevs(NULL, &run_dev)) {
575 			case -1:
576 				errx(1, "%s", devstat_errbuf);
577 				break;
578 			case 1:
579 				num_devices = run_dev.dinfo->numdevs;
580 				generation = run_dev.dinfo->generation;
581 				retval = dscmd("refresh",NULL, MAXDRIVES, &cur_dev);
582 				if (retval == 2)
583 					labelkre();
584 				break;
585 			default:
586 				break;
587 			}
588 		}
589 		return (retval);
590 	}
591 	retval = dscmd(cmd, args, MAXDRIVES, &cur_dev);
592 
593 	if (retval == 2)
594 		labelkre();
595 
596 	return(retval);
597 }
598 
599 /* calculate number of users on the system */
600 static int
601 ucount(void)
602 {
603 	int nusers = 0;
604 	struct utmpx *ut;
605 
606 	setutxent();
607 	while ((ut = getutxent()) != NULL)
608 		if (ut->ut_type == USER_PROCESS)
609 			nusers++;
610 	endutxent();
611 
612 	return (nusers);
613 }
614 
615 static float
616 cputime(int indx)
617 {
618 	double lt;
619 	int i;
620 
621 	lt = 0;
622 	for (i = 0; i < CPUSTATES; i++)
623 		lt += s.time[i];
624 	if (lt == 0.0)
625 		lt = 1.0;
626 	return (s.time[indx] * 100.0 / lt);
627 }
628 
629 void
630 putint(int n, int l, int lc, int w)
631 {
632 
633 	do_putuint64(n, l, lc, w, SI);
634 }
635 
636 static void
637 do_putuint64(uint64_t n, int l, int lc, int w, int div)
638 {
639 	int snr;
640 	char b[128];
641 	char lbuf[128];
642 
643 	move(l, lc);
644 #ifdef DEBUG
645 		while (w-- > 0)
646 			addch('*');
647 		return;
648 #endif
649 	if (n == 0) {
650 		while (w-- > 0)
651 			addch(' ');
652 		return;
653 	}
654 	snr = snprintf(b, sizeof(b), "%*ju", w, (uintmax_t)n);
655 	if (snr != w) {
656 		humanize_number(lbuf, w, n, "", HN_AUTOSCALE,
657 		    HN_NOSPACE | HN_DECIMAL | div);
658 		snr = snprintf(b, sizeof(b), "%*s", w, lbuf);
659 	}
660 	if (snr != w) {
661 		while (w-- > 0)
662 			addch('*');
663 		return;
664 	}
665 	addstr(b);
666 }
667 
668 void
669 putfloat(double f, int l, int lc, int w, int d, int nz)
670 {
671 	int snr;
672 	char b[128];
673 
674 	move(l, lc);
675 #ifdef DEBUG
676 		while (--w >= 0)
677 			addch('*');
678 		return;
679 #endif
680 	if (nz && f == 0.0) {
681 		while (--w >= 0)
682 			addch(' ');
683 		return;
684 	}
685 	snr = snprintf(b, sizeof(b), "%*.*f", w, d, f);
686 	if (snr != w)
687 		snr = snprintf(b, sizeof(b), "%*.0f", w, f);
688 	if (snr != w)
689 		snr = snprintf(b, sizeof(b), "%*.0fk", w - 1, f / 1000);
690 	if (snr != w)
691 		snr = snprintf(b, sizeof(b), "%*.0fM", w - 1, f / 1000000);
692 	if (snr != w) {
693 		while (--w >= 0)
694 			addch('*');
695 		return;
696 	}
697 	addstr(b);
698 }
699 
700 void
701 putlongdouble(long double f, int l, int lc, int w, int d, int nz)
702 {
703 	int snr;
704 	char b[128];
705 
706 	move(l, lc);
707 #ifdef DEBUG
708 		while (--w >= 0)
709 			addch('*');
710 		return;
711 #endif
712 	if (nz && f == 0.0) {
713 		while (--w >= 0)
714 			addch(' ');
715 		return;
716 	}
717 	snr = snprintf(b, sizeof(b), "%*.*Lf", w, d, f);
718 	if (snr != w)
719 		snr = snprintf(b, sizeof(b), "%*.0Lf", w, f);
720 	if (snr != w)
721 		snr = snprintf(b, sizeof(b), "%*.0Lfk", w - 1, f / 1000);
722 	if (snr != w)
723 		snr = snprintf(b, sizeof(b), "%*.0LfM", w - 1, f / 1000000);
724 	if (snr != w) {
725 		while (--w >= 0)
726 			addch('*');
727 		return;
728 	}
729 	addstr(b);
730 }
731 
732 static void
733 getinfo(struct Info *ls)
734 {
735 	struct devinfo *tmp_dinfo;
736 	size_t size;
737 	int mib[2];
738 
739 	GETSYSCTL("kern.cp_time", ls->time);
740 	GETSYSCTL("kern.cp_time", cur_dev.cp_time);
741 	GETSYSCTL("vm.stats.sys.v_swtch", ls->v_swtch);
742 	GETSYSCTL("vm.stats.sys.v_trap", ls->v_trap);
743 	GETSYSCTL("vm.stats.sys.v_syscall", ls->v_syscall);
744 	GETSYSCTL("vm.stats.sys.v_intr", ls->v_intr);
745 	GETSYSCTL("vm.stats.sys.v_soft", ls->v_soft);
746 	GETSYSCTL("vm.stats.vm.v_vm_faults", ls->v_vm_faults);
747 	GETSYSCTL("vm.stats.vm.v_io_faults", ls->v_io_faults);
748 	GETSYSCTL("vm.stats.vm.v_cow_faults", ls->v_cow_faults);
749 	GETSYSCTL("vm.stats.vm.v_zfod", ls->v_zfod);
750 	GETSYSCTL("vm.stats.vm.v_ozfod", ls->v_ozfod);
751 	GETSYSCTL("vm.stats.vm.v_swapin", ls->v_swapin);
752 	GETSYSCTL("vm.stats.vm.v_swapout", ls->v_swapout);
753 	GETSYSCTL("vm.stats.vm.v_swappgsin", ls->v_swappgsin);
754 	GETSYSCTL("vm.stats.vm.v_swappgsout", ls->v_swappgsout);
755 	GETSYSCTL("vm.stats.vm.v_vnodein", ls->v_vnodein);
756 	GETSYSCTL("vm.stats.vm.v_vnodeout", ls->v_vnodeout);
757 	GETSYSCTL("vm.stats.vm.v_vnodepgsin", ls->v_vnodepgsin);
758 	GETSYSCTL("vm.stats.vm.v_vnodepgsout", ls->v_vnodepgsout);
759 	GETSYSCTL("vm.stats.vm.v_intrans", ls->v_intrans);
760 	GETSYSCTL("vm.stats.vm.v_reactivated", ls->v_reactivated);
761 	GETSYSCTL("vm.stats.vm.v_pdwakeups", ls->v_pdwakeups);
762 	GETSYSCTL("vm.stats.vm.v_pdpages", ls->v_pdpages);
763 	GETSYSCTL("vm.stats.vm.v_dfree", ls->v_dfree);
764 	GETSYSCTL("vm.stats.vm.v_pfree", ls->v_pfree);
765 	GETSYSCTL("vm.stats.vm.v_tfree", ls->v_tfree);
766 	GETSYSCTL("vm.stats.vm.v_free_count", ls->v_free_count);
767 	GETSYSCTL("vm.stats.vm.v_wire_count", ls->v_wire_count);
768 	GETSYSCTL("vm.stats.vm.v_active_count", ls->v_active_count);
769 	GETSYSCTL("vm.stats.vm.v_inactive_count", ls->v_inactive_count);
770 	GETSYSCTL("vm.stats.vm.v_laundry_count", ls->v_laundry_count);
771 	GETSYSCTL("vfs.bufspace", ls->bufspace);
772 	GETSYSCTL("kern.maxvnodes", ls->maxvnodes);
773 	GETSYSCTL("vfs.numvnodes", ls->numvnodes);
774 	GETSYSCTL("vfs.freevnodes", ls->freevnodes);
775 	GETSYSCTL("vfs.cache.nchstats", ls->nchstats);
776 	GETSYSCTL("vfs.numdirtybuffers", ls->numdirtybuffers);
777 	GETSYSCTL("vm.kmem_map_size", ls->v_kmem_map_size);
778 	getsysctl("hw.intrcnt", ls->intrcnt, nintr * sizeof(u_long));
779 
780 	size = sizeof(ls->Total);
781 	mib[0] = CTL_VM;
782 	mib[1] = VM_TOTAL;
783 	if (sysctl(mib, 2, &ls->Total, &size, NULL, 0) < 0) {
784 		error("Can't get kernel info: %s\n", strerror(errno));
785 		bzero(&ls->Total, sizeof(ls->Total));
786 	}
787 	size = sizeof(ncpu);
788 	if (sysctlbyname("hw.ncpu", &ncpu, &size, NULL, 0) < 0 ||
789 	    size != sizeof(ncpu))
790 		ncpu = 1;
791 
792 	tmp_dinfo = last_dev.dinfo;
793 	last_dev.dinfo = cur_dev.dinfo;
794 	cur_dev.dinfo = tmp_dinfo;
795 
796 	last_dev.snap_time = cur_dev.snap_time;
797 	dsgetinfo(&cur_dev);
798 }
799 
800 static void
801 allocinfo(struct Info *ls)
802 {
803 
804 	ls->intrcnt = (long *) calloc(nintr, sizeof(long));
805 	if (ls->intrcnt == NULL)
806 		errx(2, "out of memory");
807 }
808 
809 static void
810 copyinfo(struct Info *from, struct Info *to)
811 {
812 	long *intrcnt;
813 
814 	/*
815 	 * time, wds, seek, and xfer are malloc'd so we have to
816 	 * save the pointers before the structure copy and then
817 	 * copy by hand.
818 	 */
819 	intrcnt = to->intrcnt;
820 	*to = *from;
821 
822 	bcopy(from->intrcnt, to->intrcnt = intrcnt, nintr * sizeof (int));
823 }
824