xref: /freebsd/usr.bin/systat/vmstat.c (revision 5e3190f700637fcfc1a52daeaa4a031fdd2557c7)
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 
33 #ifdef lint
34 static const char sccsid[] = "@(#)vmstat.c	8.2 (Berkeley) 1/12/94";
35 #endif
36 
37 /*
38  * Cursed vmstat -- from Robert Elz.
39  */
40 
41 #include <sys/param.h>
42 #include <sys/stat.h>
43 #include <sys/time.h>
44 #include <sys/proc.h>
45 #include <sys/uio.h>
46 #include <sys/namei.h>
47 #include <sys/resource.h>
48 #include <sys/sysctl.h>
49 #include <sys/vmmeter.h>
50 
51 #include <vm/vm_param.h>
52 
53 #include <ctype.h>
54 #include <err.h>
55 #include <errno.h>
56 #include <langinfo.h>
57 #include <libutil.h>
58 #include <nlist.h>
59 #include <paths.h>
60 #include <signal.h>
61 #include <stdlib.h>
62 #include <string.h>
63 #include <time.h>
64 #include <unistd.h>
65 #include <utmpx.h>
66 #include "systat.h"
67 #include "extern.h"
68 #include "devs.h"
69 
70 static struct Info {
71 	long	time[CPUSTATES];
72 	uint64_t v_swtch;	/* context switches */
73 	uint64_t v_trap;	/* calls to trap */
74 	uint64_t v_syscall;	/* calls to syscall() */
75 	uint64_t v_intr;	/* device interrupts */
76 	uint64_t v_soft;	/* software interrupts */
77 	/*
78 	 * Virtual memory activity.
79 	 */
80 	uint64_t v_vm_faults;	/* number of address memory faults */
81 	uint64_t v_io_faults;	/* page faults requiring I/O */
82 	uint64_t v_cow_faults;	/* number of copy-on-writes */
83 	uint64_t v_zfod;	/* pages zero filled on demand */
84 	uint64_t v_ozfod;	/* optimized zero fill pages */
85 	uint64_t v_swapin;	/* swap pager pageins */
86 	uint64_t v_swapout;	/* swap pager pageouts */
87 	uint64_t v_swappgsin;	/* swap pager pages paged in */
88 	uint64_t v_swappgsout;	/* swap pager pages paged out */
89 	uint64_t v_vnodein;	/* vnode pager pageins */
90 	uint64_t v_vnodeout;	/* vnode pager pageouts */
91 	uint64_t v_vnodepgsin;	/* vnode_pager pages paged in */
92 	uint64_t v_vnodepgsout;	/* vnode pager pages paged out */
93 	uint64_t v_intrans;	/* intransit blocking page faults */
94 	uint64_t v_reactivated;	/* number of pages reactivated by pagedaemon */
95 	uint64_t v_pdwakeups;	/* number of times daemon has awaken from sleep */
96 	uint64_t v_pdpages;	/* number of pages analyzed by daemon */
97 
98 	uint64_t v_dfree;	/* pages freed by daemon */
99 	uint64_t v_pfree;	/* pages freed by exiting processes */
100 	uint64_t v_tfree;	/* total pages freed */
101 	/*
102 	 * Distribution of page usages.
103 	 */
104 	u_int v_free_count;	/* number of pages free */
105 	u_int v_wire_count;	/* number of pages wired down */
106 	u_int v_active_count;	/* number of pages active */
107 	u_int v_inactive_count;	/* number of pages inactive */
108 	u_int v_laundry_count;	/* number of pages in laundry queue */
109 	u_long v_kmem_map_size;	/* Current kmem allocation size */
110 	struct	vmtotal Total;
111 	struct	nchstats nchstats;
112 	long	nchcount;
113 	long	*intrcnt;
114 	long	bufspace;
115 	u_long	maxvnodes;
116 	long	numvnodes;
117 	long	freevnodes;
118 	int	numdirtybuffers;
119 } s, s1, s2, z;
120 static u_long kmem_size;
121 static u_int v_page_count;
122 
123 
124 #define	total s.Total
125 #define	nchtotal s.nchstats
126 #define	oldnchtotal s1.nchstats
127 
128 static	enum state { BOOT, TIME, RUN } state = TIME;
129 enum divisor { IEC = 0, SI = HN_DIVISOR_1000 };
130 
131 static void allocinfo(struct Info *);
132 static void copyinfo(struct Info *, struct Info *);
133 static float cputime(int);
134 static void do_putuint64(uint64_t, int, int, int, int);
135 static void getinfo(struct Info *);
136 static int ucount(void);
137 
138 static	int ncpu;
139 static	char buf[26];
140 static	time_t t;
141 static	double etime;
142 static	int nintr;
143 static	long *intrloc;
144 static	char **intrname;
145 static	int nextintsrow;
146 
147 WINDOW *
148 openkre(void)
149 {
150 
151 	return (stdscr);
152 }
153 
154 void
155 closekre(WINDOW *w)
156 {
157 
158 	if (w == NULL)
159 		return;
160 	wclear(w);
161 	wrefresh(w);
162 }
163 
164 /*
165  * These constants define where the major pieces are laid out
166  */
167 #define STATROW		 0	/* uses 1 row and 67 cols */
168 #define STATCOL		 0
169 #define MEMROW		 2	/* uses 4 rows and 45 cols */
170 #define MEMCOL		 0
171 #define PAGEROW		 1	/* uses 4 rows and 30 cols */
172 #define PAGECOL		47
173 #define INTSROW		 5	/* uses all rows to bottom and 16 cols */
174 #define INTSCOL		64
175 #define PROCSROW	 6	/* uses 3 rows and 20 cols */
176 #define PROCSCOL	 0
177 #define GENSTATROW	 7	/* uses 2 rows and 29 cols */
178 #define GENSTATCOL	22
179 #define VMSTATROW	 5	/* uses 17 rows and 12-14 cols */
180 #define VMSTATCOL	52
181 #define GRAPHROW	10	/* uses 3 rows and 49-51 cols */
182 #define GRAPHCOL	 0
183 #define VNSTATROW	13	/* uses 4 rows and 13 columns */
184 #define VNSTATCOL	35
185 #define NAMEIROW	14	/* uses 3 rows and 32 cols */
186 #define NAMEICOL	 0
187 #define DISKROW		18	/* uses 5 rows and 47 cols (for 7 drives) */
188 #define DISKCOL		 0
189 
190 #define	DRIVESPACE	 7	/* max # for space */
191 
192 #define	MAXDRIVES	DRIVESPACE	 /* max # to display */
193 
194 int
195 initkre(void)
196 {
197 	char *cp, *cp1, *cp2, *intrnamebuf, *nextcp;
198 	int i;
199 	size_t sz;
200 
201 	if (dsinit(MAXDRIVES) != 1)
202 		return(0);
203 
204 	if (nintr == 0) {
205 		if (sysctlbyname("hw.intrcnt", NULL, &sz, NULL, 0) == -1) {
206 			error("sysctl(hw.intrcnt...) failed: %s",
207 			      strerror(errno));
208 			return (0);
209 		}
210 		nintr = sz / sizeof(u_long);
211 		intrloc = calloc(nintr, sizeof (long));
212 		intrname = calloc(nintr, sizeof (char *));
213 		intrnamebuf = sysctl_dynread("hw.intrnames", NULL);
214 		if (intrnamebuf == NULL || intrname == NULL ||
215 		    intrloc == NULL) {
216 			error("Out of memory");
217 			if (intrnamebuf)
218 				free(intrnamebuf);
219 			if (intrname)
220 				free(intrname);
221 			if (intrloc)
222 				free(intrloc);
223 			nintr = 0;
224 			return(0);
225 		}
226 		for (cp = intrnamebuf, i = 0; i < nintr; i++) {
227 			nextcp = cp + strlen(cp) + 1;
228 
229 			/* Discard trailing spaces. */
230 			for (cp1 = nextcp - 1; cp1 > cp && *(cp1 - 1) == ' '; )
231 				*--cp1 = '\0';
232 
233 			/* Convert "irqN: name" to "name irqN". */
234 			if (strncmp(cp, "irq", 3) == 0) {
235 				cp1 = cp + 3;
236 				while (isdigit((u_char)*cp1))
237 					cp1++;
238 				if (cp1 != cp && *cp1 == ':' &&
239 				    *(cp1 + 1) == ' ') {
240 					sz = strlen(cp);
241 					*cp1 = '\0';
242 					cp1 = cp1 + 2;
243 					cp2 = strdup(cp);
244 					bcopy(cp1, cp, sz - (cp1 - cp) + 1);
245 					if (sz <= 10 + 4) {
246 						strcat(cp, " ");
247 						strcat(cp, cp2 + 3);
248 					}
249 					free(cp2);
250 				}
251 			}
252 
253 			/*
254 			 * Convert "name irqN" to "name N" if the former is
255 			 * longer than the field width.
256 			 */
257 			if ((cp1 = strstr(cp, "irq")) != NULL &&
258 			    strlen(cp) > 10)
259 				bcopy(cp1 + 3, cp1, strlen(cp1 + 3) + 1);
260 
261 			intrname[i] = cp;
262 			cp = nextcp;
263 		}
264 		nextintsrow = INTSROW + 2;
265 		allocinfo(&s);
266 		allocinfo(&s1);
267 		allocinfo(&s2);
268 		allocinfo(&z);
269 	}
270 	GETSYSCTL("vm.kmem_size", kmem_size);
271 	GETSYSCTL("vm.stats.vm.v_page_count", v_page_count);
272 	getinfo(&s2);
273 	copyinfo(&s2, &s1);
274 	return(1);
275 }
276 
277 void
278 fetchkre(void)
279 {
280 	time_t now;
281 	struct tm *tp;
282 	static int d_first = -1;
283 
284 	if (d_first < 0)
285 		d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
286 
287 	time(&now);
288 	tp = localtime(&now);
289 	(void) strftime(buf, sizeof(buf),
290 			d_first ? "%e %b %T" : "%b %e %T", tp);
291 	getinfo(&s);
292 }
293 
294 void
295 labelkre(void)
296 {
297 	int i;
298 
299 	clear();
300 	mvprintw(STATROW, STATCOL + 6, "users    Load");
301 	mvprintw(STATROW + 1, STATCOL + 3, "Mem usage:    %%Phy   %%Kmem");
302 	mvprintw(MEMROW, MEMCOL, "Mem:      REAL           VIRTUAL");
303 	mvprintw(MEMROW + 1, MEMCOL, "       Tot   Share     Tot    Share");
304 	mvprintw(MEMROW + 2, MEMCOL, "Act");
305 	mvprintw(MEMROW + 3, MEMCOL, "All");
306 
307 	mvprintw(MEMROW + 1, MEMCOL + 40, "Free");
308 
309 	mvprintw(PAGEROW, PAGECOL,     "         VN PAGER   SWAP PAGER");
310 	mvprintw(PAGEROW + 1, PAGECOL, "         in   out     in   out");
311 	mvprintw(PAGEROW + 2, PAGECOL, "count");
312 	mvprintw(PAGEROW + 3, PAGECOL, "pages");
313 
314 	mvprintw(INTSROW, INTSCOL + 1, "Interrupts");
315 	mvprintw(INTSROW + 1, INTSCOL + 6, "total");
316 
317 	mvprintw(VMSTATROW, VMSTATCOL + 6, "ioflt");
318 	mvprintw(VMSTATROW + 1, VMSTATCOL + 6, "cow");
319 	mvprintw(VMSTATROW + 2, VMSTATCOL + 6, "zfod");
320 	mvprintw(VMSTATROW + 3, VMSTATCOL + 6, "ozfod");
321 	mvprintw(VMSTATROW + 4, VMSTATCOL + 6 - 1, "%%ozfod");
322 	mvprintw(VMSTATROW + 5, VMSTATCOL + 6, "daefr");
323 	mvprintw(VMSTATROW + 6, VMSTATCOL + 6, "prcfr");
324 	mvprintw(VMSTATROW + 7, VMSTATCOL + 6, "totfr");
325 	mvprintw(VMSTATROW + 8, VMSTATCOL + 6, "react");
326 	mvprintw(VMSTATROW + 9, VMSTATCOL + 6, "pdwak");
327 	mvprintw(VMSTATROW + 10, VMSTATCOL + 6, "pdpgs");
328 	mvprintw(VMSTATROW + 11, VMSTATCOL + 6, "intrn");
329 	mvprintw(VMSTATROW + 12, VMSTATCOL + 6, "wire");
330 	mvprintw(VMSTATROW + 13, VMSTATCOL + 6, "act");
331 	mvprintw(VMSTATROW + 14, VMSTATCOL + 6, "inact");
332 	mvprintw(VMSTATROW + 15, VMSTATCOL + 6, "laund");
333 	mvprintw(VMSTATROW + 16, VMSTATCOL + 6, "free");
334 	if (LINES - 1 > VMSTATROW + 17)
335 		mvprintw(VMSTATROW + 17, VMSTATCOL + 6, "buf");
336 
337 	mvprintw(GENSTATROW, GENSTATCOL, " Csw  Trp  Sys  Int  Sof  Flt");
338 
339 	mvprintw(GRAPHROW, GRAPHCOL,
340 		"  . %%Sys    . %%Intr   . %%User   . %%Nice   . %%Idle");
341 	mvprintw(PROCSROW, PROCSCOL, "Proc:");
342 	mvprintw(PROCSROW + 1, PROCSCOL, "  r   p   d    s   w");
343 	mvprintw(GRAPHROW + 1, GRAPHCOL,
344 		"|    |    |    |    |    |    |    |    |    |    |");
345 
346 	mvprintw(VNSTATROW, VNSTATCOL + 8, "dtbuf");
347 	mvprintw(VNSTATROW + 1, VNSTATCOL + 8, "maxvn");
348 	mvprintw(VNSTATROW + 2, VNSTATCOL + 8, "numvn");
349 	mvprintw(VNSTATROW + 3, VNSTATCOL + 8, "frevn");
350 
351 	mvprintw(NAMEIROW, NAMEICOL, "Namei     Name-cache   Dir-cache");
352 	mvprintw(NAMEIROW + 1, NAMEICOL,
353 		"   Calls    hits   %%    hits   %%");
354 	dslabel(MAXDRIVES, DISKCOL, DISKROW);
355 
356 	for (i = 0; i < nintr; i++) {
357 		if (intrloc[i] == 0)
358 			continue;
359 		mvprintw(intrloc[i], INTSCOL + 6, "%-10.10s", intrname[i]);
360 	}
361 }
362 
363 #define X(fld)	{t=s.fld[i]; s.fld[i]-=s1.fld[i]; if(state==TIME) s1.fld[i]=t;}
364 #define Q(fld)	{t=cur_dev.fld[i]; cur_dev.fld[i]-=last_dev.fld[i]; if(state==TIME) last_dev.fld[i]=t;}
365 #define Y(fld)	{t = s.fld; s.fld -= s1.fld; if(state == TIME) s1.fld = t;}
366 #define Z(fld)	{t = s.nchstats.fld; s.nchstats.fld -= s1.nchstats.fld; \
367 	if(state == TIME) s1.nchstats.fld = t;}
368 #define PUTRATE(fld, l, c, w) \
369 do { \
370 	Y(fld); \
371 	sysputwuint64(wnd, l, c, w, (s.fld/etime + 0.5), 0); \
372 } while (0)
373 #define MAXFAIL 5
374 
375 static	char cpuchar[CPUSTATES] = { '=' , '+', '>', '-', ' ' };
376 static	char cpuorder[CPUSTATES] = { CP_SYS, CP_INTR, CP_USER, CP_NICE,
377 				     CP_IDLE };
378 
379 void
380 showkre(void)
381 {
382 	float f1, f2;
383 	int psiz, inttotal;
384 	int i, l, lc;
385 	static int failcnt = 0;
386 
387 	etime = 0;
388 	for(i = 0; i < CPUSTATES; i++) {
389 		X(time);
390 		Q(cp_time);
391 		etime += s.time[i];
392 	}
393 	if (etime < 5.0) {	/* < 5 ticks - ignore this trash */
394 		if (failcnt++ >= MAXFAIL) {
395 			clear();
396 			mvprintw(2, 10, "The alternate system clock has died!");
397 			mvprintw(3, 10, "Reverting to ``pigs'' display.");
398 			move(CMDLINE, 0);
399 			refresh();
400 			failcnt = 0;
401 			sleep(5);
402 			command("pigs");
403 		}
404 		return;
405 	}
406 	failcnt = 0;
407 	etime /= hertz;
408 	etime /= ncpu;
409 	inttotal = 0;
410 	for (i = 0; i < nintr; i++) {
411 		if (s.intrcnt[i] == 0)
412 			continue;
413 		X(intrcnt);
414 		l = (int)((float)s.intrcnt[i]/etime + 0.5);
415 		inttotal += l;
416 		if (intrloc[i] == 0) {
417 			if (nextintsrow == LINES)
418 				continue;
419 			intrloc[i] = nextintsrow++;
420 			mvprintw(intrloc[i], INTSCOL + 6, "%-10.10s",
421 				intrname[i]);
422 		}
423 		putint(l, intrloc[i], INTSCOL, 5);
424 	}
425 	putint(inttotal, INTSROW + 1, INTSCOL, 5);
426 	Z(ncs_goodhits); Z(ncs_badhits); Z(ncs_miss);
427 	Z(ncs_long); Z(ncs_pass2); Z(ncs_2passes); Z(ncs_neghits);
428 	s.nchcount = nchtotal.ncs_goodhits + nchtotal.ncs_badhits +
429 	    nchtotal.ncs_miss + nchtotal.ncs_long + nchtotal.ncs_neghits;
430 	if (state == TIME)
431 		s1.nchcount = s.nchcount;
432 
433 	psiz = 0;
434 	f2 = 0.0;
435 	for (lc = 0; lc < CPUSTATES; lc++) {
436 		i = cpuorder[lc];
437 		f1 = cputime(i);
438 		f2 += f1;
439 		l = (int) ((f2 + 1.0) / 2.0) - psiz;
440 		putfloat(f1, GRAPHROW, GRAPHCOL + 10 * lc, 4, 1, 0);
441 		move(GRAPHROW + 2, psiz);
442 		psiz += l;
443 		while (l-- > 0)
444 			addch(cpuchar[lc]);
445 	}
446 
447 	putint(ucount(), STATROW, STATCOL, 5);
448 	putfloat(avenrun[0], STATROW, STATCOL + 20, 5, 2, 0);
449 	putfloat(avenrun[1], STATROW, STATCOL + 26, 5, 2, 0);
450 	putfloat(avenrun[2], STATROW, STATCOL + 32, 5, 2, 0);
451 	mvaddstr(STATROW, STATCOL + 55, buf);
452 	putfloat(100.0 * (v_page_count - total.t_free) / v_page_count,
453 	   STATROW + 1, STATCOL + 15, 2, 0, 1);
454 	putfloat(100.0 * s.v_kmem_map_size / kmem_size,
455 	   STATROW + 1, STATCOL + 22, 2, 0, 1);
456 
457 	sysputpage(wnd, MEMROW + 2, MEMCOL + 4, 6, total.t_arm, 0);
458 	sysputpage(wnd, MEMROW + 2, MEMCOL + 12, 6, total.t_armshr, 0);
459 	sysputpage(wnd, MEMROW + 2, MEMCOL + 20, 6, total.t_avm, 0);
460 	sysputpage(wnd, MEMROW + 2, MEMCOL + 29, 6, total.t_avmshr, 0);
461 	sysputpage(wnd, MEMROW + 3, MEMCOL + 4, 6, total.t_rm, 0);
462 	sysputpage(wnd, MEMROW + 3, MEMCOL + 12, 6, total.t_rmshr, 0);
463 	sysputpage(wnd, MEMROW + 3, MEMCOL + 20, 6, total.t_vm, 0);
464 	sysputpage(wnd, MEMROW + 3, MEMCOL + 29, 6, total.t_vmshr, 0);
465 	sysputpage(wnd, MEMROW + 2, MEMCOL + 38, 6, total.t_free, 0);
466 	putint(total.t_rq - 1, PROCSROW + 2, PROCSCOL, 3);
467 	putint(total.t_pw, PROCSROW + 2, PROCSCOL + 4, 3);
468 	putint(total.t_dw, PROCSROW + 2, PROCSCOL + 8, 3);
469 	putint(total.t_sl, PROCSROW + 2, PROCSCOL + 12, 4);
470 	putint(total.t_sw, PROCSROW + 2, PROCSCOL + 17, 3);
471 	PUTRATE(v_io_faults, VMSTATROW, VMSTATCOL, 5);
472 	PUTRATE(v_cow_faults, VMSTATROW + 1, VMSTATCOL, 5);
473 	PUTRATE(v_zfod, VMSTATROW + 2, VMSTATCOL, 5);
474 	PUTRATE(v_ozfod, VMSTATROW + 3, VMSTATCOL, 5);
475 	putint(s.v_zfod != 0 ? (int)(s.v_ozfod * 100.0 / s.v_zfod) : 0,
476 	    VMSTATROW + 4, VMSTATCOL, 5);
477 	PUTRATE(v_dfree, VMSTATROW + 5, VMSTATCOL, 5);
478 	PUTRATE(v_pfree, VMSTATROW + 6, VMSTATCOL, 5);
479 	PUTRATE(v_tfree, VMSTATROW + 7, VMSTATCOL, 5);
480 	PUTRATE(v_reactivated, VMSTATROW + 8, VMSTATCOL, 5);
481 	PUTRATE(v_pdwakeups, VMSTATROW + 9, VMSTATCOL, 5);
482 	PUTRATE(v_pdpages, VMSTATROW + 10, VMSTATCOL, 5);
483 	PUTRATE(v_intrans, VMSTATROW + 11, VMSTATCOL, 5);
484 	sysputpage(wnd, VMSTATROW + 12, VMSTATCOL, 5, s.v_wire_count, 0);
485 	sysputpage(wnd, VMSTATROW + 13, VMSTATCOL, 5, s.v_active_count, 0);
486 	sysputpage(wnd, VMSTATROW + 14, VMSTATCOL, 5, s.v_inactive_count, 0);
487 	sysputpage(wnd, VMSTATROW + 15, VMSTATCOL, 5, s.v_laundry_count, 0);
488 	sysputpage(wnd, VMSTATROW + 16, VMSTATCOL, 5, s.v_free_count, 0);
489 	if (LINES - 1 > VMSTATROW + 17)
490 		sysputuint64(wnd, VMSTATROW + 17, VMSTATCOL, 5, s.bufspace, 0);
491 	PUTRATE(v_vnodein, PAGEROW + 2, PAGECOL + 6, 5);
492 	PUTRATE(v_vnodeout, PAGEROW + 2, PAGECOL + 12, 5);
493 	PUTRATE(v_swapin, PAGEROW + 2, PAGECOL + 19, 5);
494 	PUTRATE(v_swapout, PAGEROW + 2, PAGECOL + 25, 5);
495 	PUTRATE(v_vnodepgsin, PAGEROW + 3, PAGECOL + 6, 5);
496 	PUTRATE(v_vnodepgsout, PAGEROW + 3, PAGECOL + 12, 5);
497 	PUTRATE(v_swappgsin, PAGEROW + 3, PAGECOL + 19, 5);
498 	PUTRATE(v_swappgsout, PAGEROW + 3, PAGECOL + 25, 5);
499 	PUTRATE(v_swtch, GENSTATROW + 1, GENSTATCOL, 4);
500 	PUTRATE(v_trap, GENSTATROW + 1, GENSTATCOL + 5, 4);
501 	PUTRATE(v_syscall, GENSTATROW + 1, GENSTATCOL + 10, 4);
502 	PUTRATE(v_intr, GENSTATROW + 1, GENSTATCOL + 15, 4);
503 	PUTRATE(v_soft, GENSTATROW + 1, GENSTATCOL + 20, 4);
504 	PUTRATE(v_vm_faults, GENSTATROW + 1, GENSTATCOL + 25, 4);
505 	switch(state) {
506 	case TIME:
507 		dsshow(MAXDRIVES, DISKCOL, DISKROW, &cur_dev, &last_dev);
508 		break;
509 	case RUN:
510 		dsshow(MAXDRIVES, DISKCOL, DISKROW, &cur_dev, &run_dev);
511 		break;
512 	case BOOT:
513 		dsshow(MAXDRIVES, DISKCOL, DISKROW, &cur_dev, NULL);
514 		break;
515 	}
516 	putint(s.numdirtybuffers, VNSTATROW, VNSTATCOL, 7);
517 	putint(s.maxvnodes, VNSTATROW + 1, VNSTATCOL, 7);
518 	putint(s.numvnodes, VNSTATROW + 2, VNSTATCOL, 7);
519 	putint(s.freevnodes, VNSTATROW + 3, VNSTATCOL, 7);
520 	putint(s.nchcount, NAMEIROW + 2, NAMEICOL, 8);
521 	putint((nchtotal.ncs_goodhits + nchtotal.ncs_neghits),
522 	   NAMEIROW + 2, NAMEICOL + 9, 7);
523 #define nz(x)	((x) ? (x) : 1)
524 	putfloat((nchtotal.ncs_goodhits+nchtotal.ncs_neghits) *
525 	   100.0 / nz(s.nchcount),
526 	   NAMEIROW + 2, NAMEICOL + 17, 3, 0, 1);
527 	putint(nchtotal.ncs_pass2, NAMEIROW + 2, NAMEICOL + 21, 7);
528 	putfloat(nchtotal.ncs_pass2 * 100.0 / nz(s.nchcount),
529 	   NAMEIROW + 2, NAMEICOL + 29, 3, 0, 1);
530 #undef nz
531 }
532 
533 int
534 cmdkre(const char *cmd, const char *args)
535 {
536 	int retval;
537 
538 	if (prefix(cmd, "run")) {
539 		retval = 1;
540 		copyinfo(&s2, &s1);
541 		switch (devstat_getdevs(NULL, &run_dev)) {
542 		case -1:
543 			errx(1, "%s", devstat_errbuf);
544 			break;
545 		case 1:
546 			num_devices = run_dev.dinfo->numdevs;
547 			generation = run_dev.dinfo->generation;
548 			retval = dscmd("refresh", NULL, MAXDRIVES, &cur_dev);
549 			if (retval == 2)
550 				labelkre();
551 			break;
552 		default:
553 			break;
554 		}
555 		state = RUN;
556 		return (retval);
557 	}
558 	if (prefix(cmd, "boot")) {
559 		state = BOOT;
560 		copyinfo(&z, &s1);
561 		return (1);
562 	}
563 	if (prefix(cmd, "time")) {
564 		state = TIME;
565 		return (1);
566 	}
567 	if (prefix(cmd, "zero")) {
568 		retval = 1;
569 		if (state == RUN) {
570 			getinfo(&s1);
571 			switch (devstat_getdevs(NULL, &run_dev)) {
572 			case -1:
573 				errx(1, "%s", devstat_errbuf);
574 				break;
575 			case 1:
576 				num_devices = run_dev.dinfo->numdevs;
577 				generation = run_dev.dinfo->generation;
578 				retval = dscmd("refresh",NULL, MAXDRIVES, &cur_dev);
579 				if (retval == 2)
580 					labelkre();
581 				break;
582 			default:
583 				break;
584 			}
585 		}
586 		return (retval);
587 	}
588 	retval = dscmd(cmd, args, MAXDRIVES, &cur_dev);
589 
590 	if (retval == 2)
591 		labelkre();
592 
593 	return(retval);
594 }
595 
596 /* calculate number of users on the system */
597 static int
598 ucount(void)
599 {
600 	int nusers = 0;
601 	struct utmpx *ut;
602 
603 	setutxent();
604 	while ((ut = getutxent()) != NULL)
605 		if (ut->ut_type == USER_PROCESS)
606 			nusers++;
607 	endutxent();
608 
609 	return (nusers);
610 }
611 
612 static float
613 cputime(int indx)
614 {
615 	double lt;
616 	int i;
617 
618 	lt = 0;
619 	for (i = 0; i < CPUSTATES; i++)
620 		lt += s.time[i];
621 	if (lt == 0.0)
622 		lt = 1.0;
623 	return (s.time[indx] * 100.0 / lt);
624 }
625 
626 void
627 putint(int n, int l, int lc, int w)
628 {
629 
630 	do_putuint64(n, l, lc, w, SI);
631 }
632 
633 static void
634 do_putuint64(uint64_t n, int l, int lc, int w, int div)
635 {
636 	int snr;
637 	char b[128];
638 	char lbuf[128];
639 
640 	move(l, lc);
641 #ifdef DEBUG
642 		while (w-- > 0)
643 			addch('*');
644 		return;
645 #endif
646 	if (n == 0) {
647 		while (w-- > 0)
648 			addch(' ');
649 		return;
650 	}
651 	snr = snprintf(b, sizeof(b), "%*ju", w, (uintmax_t)n);
652 	if (snr != w) {
653 		humanize_number(lbuf, w, n, "", HN_AUTOSCALE,
654 		    HN_NOSPACE | HN_DECIMAL | div);
655 		snr = snprintf(b, sizeof(b), "%*s", w, lbuf);
656 	}
657 	if (snr != w) {
658 		while (w-- > 0)
659 			addch('*');
660 		return;
661 	}
662 	addstr(b);
663 }
664 
665 void
666 putfloat(double f, int l, int lc, int w, int d, int nz)
667 {
668 	int snr;
669 	char b[128];
670 
671 	move(l, lc);
672 #ifdef DEBUG
673 		while (--w >= 0)
674 			addch('*');
675 		return;
676 #endif
677 	if (nz && f == 0.0) {
678 		while (--w >= 0)
679 			addch(' ');
680 		return;
681 	}
682 	snr = snprintf(b, sizeof(b), "%*.*f", w, d, f);
683 	if (snr != w)
684 		snr = snprintf(b, sizeof(b), "%*.0f", w, f);
685 	if (snr != w)
686 		snr = snprintf(b, sizeof(b), "%*.0fk", w - 1, f / 1000);
687 	if (snr != w)
688 		snr = snprintf(b, sizeof(b), "%*.0fM", w - 1, f / 1000000);
689 	if (snr != w) {
690 		while (--w >= 0)
691 			addch('*');
692 		return;
693 	}
694 	addstr(b);
695 }
696 
697 void
698 putlongdouble(long double f, int l, int lc, int w, int d, int nz)
699 {
700 	int snr;
701 	char b[128];
702 
703 	move(l, lc);
704 #ifdef DEBUG
705 		while (--w >= 0)
706 			addch('*');
707 		return;
708 #endif
709 	if (nz && f == 0.0) {
710 		while (--w >= 0)
711 			addch(' ');
712 		return;
713 	}
714 	snr = snprintf(b, sizeof(b), "%*.*Lf", w, d, f);
715 	if (snr != w)
716 		snr = snprintf(b, sizeof(b), "%*.0Lf", w, f);
717 	if (snr != w)
718 		snr = snprintf(b, sizeof(b), "%*.0Lfk", w - 1, f / 1000);
719 	if (snr != w)
720 		snr = snprintf(b, sizeof(b), "%*.0LfM", w - 1, f / 1000000);
721 	if (snr != w) {
722 		while (--w >= 0)
723 			addch('*');
724 		return;
725 	}
726 	addstr(b);
727 }
728 
729 static void
730 getinfo(struct Info *ls)
731 {
732 	struct devinfo *tmp_dinfo;
733 	size_t size;
734 	int mib[2];
735 
736 	GETSYSCTL("kern.cp_time", ls->time);
737 	GETSYSCTL("kern.cp_time", cur_dev.cp_time);
738 	GETSYSCTL("vm.stats.sys.v_swtch", ls->v_swtch);
739 	GETSYSCTL("vm.stats.sys.v_trap", ls->v_trap);
740 	GETSYSCTL("vm.stats.sys.v_syscall", ls->v_syscall);
741 	GETSYSCTL("vm.stats.sys.v_intr", ls->v_intr);
742 	GETSYSCTL("vm.stats.sys.v_soft", ls->v_soft);
743 	GETSYSCTL("vm.stats.vm.v_vm_faults", ls->v_vm_faults);
744 	GETSYSCTL("vm.stats.vm.v_io_faults", ls->v_io_faults);
745 	GETSYSCTL("vm.stats.vm.v_cow_faults", ls->v_cow_faults);
746 	GETSYSCTL("vm.stats.vm.v_zfod", ls->v_zfod);
747 	GETSYSCTL("vm.stats.vm.v_ozfod", ls->v_ozfod);
748 	GETSYSCTL("vm.stats.vm.v_swapin", ls->v_swapin);
749 	GETSYSCTL("vm.stats.vm.v_swapout", ls->v_swapout);
750 	GETSYSCTL("vm.stats.vm.v_swappgsin", ls->v_swappgsin);
751 	GETSYSCTL("vm.stats.vm.v_swappgsout", ls->v_swappgsout);
752 	GETSYSCTL("vm.stats.vm.v_vnodein", ls->v_vnodein);
753 	GETSYSCTL("vm.stats.vm.v_vnodeout", ls->v_vnodeout);
754 	GETSYSCTL("vm.stats.vm.v_vnodepgsin", ls->v_vnodepgsin);
755 	GETSYSCTL("vm.stats.vm.v_vnodepgsout", ls->v_vnodepgsout);
756 	GETSYSCTL("vm.stats.vm.v_intrans", ls->v_intrans);
757 	GETSYSCTL("vm.stats.vm.v_reactivated", ls->v_reactivated);
758 	GETSYSCTL("vm.stats.vm.v_pdwakeups", ls->v_pdwakeups);
759 	GETSYSCTL("vm.stats.vm.v_pdpages", ls->v_pdpages);
760 	GETSYSCTL("vm.stats.vm.v_dfree", ls->v_dfree);
761 	GETSYSCTL("vm.stats.vm.v_pfree", ls->v_pfree);
762 	GETSYSCTL("vm.stats.vm.v_tfree", ls->v_tfree);
763 	GETSYSCTL("vm.stats.vm.v_free_count", ls->v_free_count);
764 	GETSYSCTL("vm.stats.vm.v_wire_count", ls->v_wire_count);
765 	GETSYSCTL("vm.stats.vm.v_active_count", ls->v_active_count);
766 	GETSYSCTL("vm.stats.vm.v_inactive_count", ls->v_inactive_count);
767 	GETSYSCTL("vm.stats.vm.v_laundry_count", ls->v_laundry_count);
768 	GETSYSCTL("vfs.bufspace", ls->bufspace);
769 	GETSYSCTL("kern.maxvnodes", ls->maxvnodes);
770 	GETSYSCTL("vfs.numvnodes", ls->numvnodes);
771 	GETSYSCTL("vfs.freevnodes", ls->freevnodes);
772 	GETSYSCTL("vfs.cache.nchstats", ls->nchstats);
773 	GETSYSCTL("vfs.numdirtybuffers", ls->numdirtybuffers);
774 	GETSYSCTL("vm.kmem_map_size", ls->v_kmem_map_size);
775 	getsysctl("hw.intrcnt", ls->intrcnt, nintr * sizeof(u_long));
776 
777 	size = sizeof(ls->Total);
778 	mib[0] = CTL_VM;
779 	mib[1] = VM_TOTAL;
780 	if (sysctl(mib, 2, &ls->Total, &size, NULL, 0) < 0) {
781 		error("Can't get kernel info: %s\n", strerror(errno));
782 		bzero(&ls->Total, sizeof(ls->Total));
783 	}
784 	size = sizeof(ncpu);
785 	if (sysctlbyname("hw.ncpu", &ncpu, &size, NULL, 0) < 0 ||
786 	    size != sizeof(ncpu))
787 		ncpu = 1;
788 
789 	tmp_dinfo = last_dev.dinfo;
790 	last_dev.dinfo = cur_dev.dinfo;
791 	cur_dev.dinfo = tmp_dinfo;
792 
793 	last_dev.snap_time = cur_dev.snap_time;
794 	dsgetinfo(&cur_dev);
795 }
796 
797 static void
798 allocinfo(struct Info *ls)
799 {
800 
801 	ls->intrcnt = (long *) calloc(nintr, sizeof(long));
802 	if (ls->intrcnt == NULL)
803 		errx(2, "out of memory");
804 }
805 
806 static void
807 copyinfo(struct Info *from, struct Info *to)
808 {
809 	long *intrcnt;
810 
811 	/*
812 	 * time, wds, seek, and xfer are malloc'd so we have to
813 	 * save the pointers before the structure copy and then
814 	 * copy by hand.
815 	 */
816 	intrcnt = to->intrcnt;
817 	*to = *from;
818 
819 	bcopy(from->intrcnt, to->intrcnt = intrcnt, nintr * sizeof (int));
820 }
821