xref: /freebsd/usr.bin/systat/vmstat.c (revision a03411e84728e9b267056fd31c7d1d9d1dc1b01e)
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 
34 /*
35  * Cursed vmstat -- from Robert Elz.
36  */
37 
38 #include <sys/param.h>
39 #include <sys/stat.h>
40 #include <sys/time.h>
41 #include <sys/proc.h>
42 #include <sys/uio.h>
43 #include <sys/namei.h>
44 #include <sys/resource.h>
45 #include <sys/sysctl.h>
46 #include <sys/vmmeter.h>
47 
48 #include <vm/vm_param.h>
49 
50 #include <ctype.h>
51 #include <err.h>
52 #include <errno.h>
53 #include <langinfo.h>
54 #include <libutil.h>
55 #include <nlist.h>
56 #include <paths.h>
57 #include <signal.h>
58 #include <stdlib.h>
59 #include <string.h>
60 #include <time.h>
61 #include <unistd.h>
62 #include <utmpx.h>
63 #include "systat.h"
64 #include "extern.h"
65 #include "devs.h"
66 
67 static struct Info {
68 	long	time[CPUSTATES];
69 	uint64_t v_swtch;	/* context switches */
70 	uint64_t v_trap;	/* calls to trap */
71 	uint64_t v_syscall;	/* calls to syscall() */
72 	uint64_t v_intr;	/* device interrupts */
73 	uint64_t v_soft;	/* software interrupts */
74 	/*
75 	 * Virtual memory activity.
76 	 */
77 	uint64_t v_vm_faults;	/* number of address memory faults */
78 	uint64_t v_io_faults;	/* page faults requiring I/O */
79 	uint64_t v_cow_faults;	/* number of copy-on-writes */
80 	uint64_t v_zfod;	/* pages zero filled on demand */
81 	uint64_t v_ozfod;	/* optimized zero fill pages */
82 	uint64_t v_swapin;	/* swap pager pageins */
83 	uint64_t v_swapout;	/* swap pager pageouts */
84 	uint64_t v_swappgsin;	/* swap pager pages paged in */
85 	uint64_t v_swappgsout;	/* swap pager pages paged out */
86 	uint64_t v_vnodein;	/* vnode pager pageins */
87 	uint64_t v_vnodeout;	/* vnode pager pageouts */
88 	uint64_t v_vnodepgsin;	/* vnode_pager pages paged in */
89 	uint64_t v_vnodepgsout;	/* vnode pager pages paged out */
90 	uint64_t v_intrans;	/* intransit blocking page faults */
91 	uint64_t v_reactivated;	/* number of pages reactivated by pagedaemon */
92 	uint64_t v_pdwakeups;	/* number of times daemon has awaken from sleep */
93 	uint64_t v_pdpages;	/* number of pages analyzed by daemon */
94 
95 	uint64_t v_dfree;	/* pages freed by daemon */
96 	uint64_t v_pfree;	/* pages freed by exiting processes */
97 	uint64_t v_tfree;	/* total pages freed */
98 	/*
99 	 * Distribution of page usages.
100 	 */
101 	u_int v_free_count;	/* number of pages free */
102 	u_int v_wire_count;	/* number of pages wired down */
103 	u_int v_active_count;	/* number of pages active */
104 	u_int v_inactive_count;	/* number of pages inactive */
105 	u_int v_laundry_count;	/* number of pages in laundry queue */
106 	u_long v_kmem_map_size;	/* Current kmem allocation size */
107 	struct	vmtotal Total;
108 	struct	nchstats nchstats;
109 	long	nchcount;
110 	long	*intrcnt;
111 	long	bufspace;
112 	u_long	maxvnodes;
113 	long	numvnodes;
114 	long	freevnodes;
115 	int	numdirtybuffers;
116 } s, s1, s2, z;
117 static u_long kmem_size;
118 static u_int v_page_count;
119 
120 
121 #define	total s.Total
122 #define	nchtotal s.nchstats
123 #define	oldnchtotal s1.nchstats
124 
125 static	enum state { BOOT, TIME, RUN } state = TIME;
126 enum divisor { IEC = 0, SI = HN_DIVISOR_1000 };
127 
128 static void allocinfo(struct Info *);
129 static void copyinfo(struct Info *, struct Info *);
130 static float cputime(int);
131 static void do_putuint64(uint64_t, int, int, int, int);
132 static void getinfo(struct Info *);
133 static int ucount(void);
134 
135 static	int ncpu;
136 static	char buf[26];
137 static	time_t t;
138 static	double etime;
139 static	int nintr;
140 static	long *intrloc;
141 static	char **intrname;
142 static	int nextintsrow;
143 
144 WINDOW *
145 openkre(void)
146 {
147 
148 	return (stdscr);
149 }
150 
151 void
152 closekre(WINDOW *w)
153 {
154 
155 	if (w == NULL)
156 		return;
157 	wclear(w);
158 	wrefresh(w);
159 }
160 
161 /*
162  * These constants define where the major pieces are laid out
163  */
164 #define STATROW		 0	/* uses 1 row and 67 cols */
165 #define STATCOL		 0
166 #define MEMROW		 2	/* uses 4 rows and 45 cols */
167 #define MEMCOL		 0
168 #define PAGEROW		 1	/* uses 4 rows and 30 cols */
169 #define PAGECOL		47
170 #define INTSROW		 5	/* uses all rows to bottom and 16 cols */
171 #define INTSCOL		64
172 #define PROCSROW	 6	/* uses 3 rows and 20 cols */
173 #define PROCSCOL	 0
174 #define GENSTATROW	 7	/* uses 2 rows and 29 cols */
175 #define GENSTATCOL	22
176 #define VMSTATROW	 5	/* uses 17 rows and 12-14 cols */
177 #define VMSTATCOL	52
178 #define GRAPHROW	10	/* uses 3 rows and 49-51 cols */
179 #define GRAPHCOL	 0
180 #define VNSTATROW	13	/* uses 4 rows and 13 columns */
181 #define VNSTATCOL	35
182 #define NAMEIROW	14	/* uses 3 rows and 32 cols */
183 #define NAMEICOL	 0
184 #define DISKROW		18	/* uses 5 rows and 47 cols (for 7 drives) */
185 #define DISKCOL		 0
186 
187 #define	DRIVESPACE	 7	/* max # for space */
188 
189 #define	MAXDRIVES	DRIVESPACE	 /* max # to display */
190 
191 int
192 initkre(void)
193 {
194 	char *cp, *cp1, *cp2, *intrnamebuf, *nextcp;
195 	int i;
196 	size_t sz;
197 
198 	if (dsinit(MAXDRIVES) != 1)
199 		return(0);
200 
201 	if (nintr == 0) {
202 		if (sysctlbyname("hw.intrcnt", NULL, &sz, NULL, 0) == -1) {
203 			error("sysctl(hw.intrcnt...) failed: %s",
204 			      strerror(errno));
205 			return (0);
206 		}
207 		nintr = sz / sizeof(u_long);
208 		intrloc = calloc(nintr, sizeof (long));
209 		intrname = calloc(nintr, sizeof (char *));
210 		intrnamebuf = sysctl_dynread("hw.intrnames", NULL);
211 		if (intrnamebuf == NULL || intrname == NULL ||
212 		    intrloc == NULL) {
213 			error("Out of memory");
214 			if (intrnamebuf)
215 				free(intrnamebuf);
216 			if (intrname)
217 				free(intrname);
218 			if (intrloc)
219 				free(intrloc);
220 			nintr = 0;
221 			return(0);
222 		}
223 		for (cp = intrnamebuf, i = 0; i < nintr; i++) {
224 			nextcp = cp + strlen(cp) + 1;
225 
226 			/* Discard trailing spaces. */
227 			for (cp1 = nextcp - 1; cp1 > cp && *(cp1 - 1) == ' '; )
228 				*--cp1 = '\0';
229 
230 			/* Convert "irqN: name" to "name irqN". */
231 			if (strncmp(cp, "irq", 3) == 0) {
232 				cp1 = cp + 3;
233 				while (isdigit((u_char)*cp1))
234 					cp1++;
235 				if (cp1 != cp && *cp1 == ':' &&
236 				    *(cp1 + 1) == ' ') {
237 					sz = strlen(cp);
238 					*cp1 = '\0';
239 					cp1 = cp1 + 2;
240 					cp2 = strdup(cp);
241 					bcopy(cp1, cp, sz - (cp1 - cp) + 1);
242 					if (sz <= 10 + 4) {
243 						strcat(cp, " ");
244 						strcat(cp, cp2 + 3);
245 					}
246 					free(cp2);
247 				}
248 			}
249 
250 			/*
251 			 * Convert "name irqN" to "name N" if the former is
252 			 * longer than the field width.
253 			 */
254 			if ((cp1 = strstr(cp, "irq")) != NULL &&
255 			    strlen(cp) > 10)
256 				bcopy(cp1 + 3, cp1, strlen(cp1 + 3) + 1);
257 
258 			intrname[i] = cp;
259 			cp = nextcp;
260 		}
261 		nextintsrow = INTSROW + 2;
262 		allocinfo(&s);
263 		allocinfo(&s1);
264 		allocinfo(&s2);
265 		allocinfo(&z);
266 	}
267 	GETSYSCTL("vm.kmem_size", kmem_size);
268 	GETSYSCTL("vm.stats.vm.v_page_count", v_page_count);
269 	getinfo(&s2);
270 	copyinfo(&s2, &s1);
271 	return(1);
272 }
273 
274 void
275 fetchkre(void)
276 {
277 	time_t now;
278 	struct tm *tp;
279 	static int d_first = -1;
280 
281 	if (d_first < 0)
282 		d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
283 
284 	time(&now);
285 	tp = localtime(&now);
286 	(void) strftime(buf, sizeof(buf),
287 			d_first ? "%e %b %T" : "%b %e %T", tp);
288 	getinfo(&s);
289 }
290 
291 void
292 labelkre(void)
293 {
294 	int i;
295 
296 	clear();
297 	mvprintw(STATROW, STATCOL + 6, "users    Load");
298 	mvprintw(STATROW + 1, STATCOL + 3, "Mem usage:    %%Phy   %%Kmem");
299 	mvprintw(MEMROW, MEMCOL, "Mem:      REAL           VIRTUAL");
300 	mvprintw(MEMROW + 1, MEMCOL, "       Tot   Share     Tot    Share");
301 	mvprintw(MEMROW + 2, MEMCOL, "Act");
302 	mvprintw(MEMROW + 3, MEMCOL, "All");
303 
304 	mvprintw(MEMROW + 1, MEMCOL + 40, "Free");
305 
306 	mvprintw(PAGEROW, PAGECOL,     "         VN PAGER   SWAP PAGER");
307 	mvprintw(PAGEROW + 1, PAGECOL, "         in   out     in   out");
308 	mvprintw(PAGEROW + 2, PAGECOL, "count");
309 	mvprintw(PAGEROW + 3, PAGECOL, "pages");
310 
311 	mvprintw(INTSROW, INTSCOL + 1, "Interrupts");
312 	mvprintw(INTSROW + 1, INTSCOL + 6, "total");
313 
314 	mvprintw(VMSTATROW, VMSTATCOL + 6, "ioflt");
315 	mvprintw(VMSTATROW + 1, VMSTATCOL + 6, "cow");
316 	mvprintw(VMSTATROW + 2, VMSTATCOL + 6, "zfod");
317 	mvprintw(VMSTATROW + 3, VMSTATCOL + 6, "ozfod");
318 	mvprintw(VMSTATROW + 4, VMSTATCOL + 6 - 1, "%%ozfod");
319 	mvprintw(VMSTATROW + 5, VMSTATCOL + 6, "daefr");
320 	mvprintw(VMSTATROW + 6, VMSTATCOL + 6, "prcfr");
321 	mvprintw(VMSTATROW + 7, VMSTATCOL + 6, "totfr");
322 	mvprintw(VMSTATROW + 8, VMSTATCOL + 6, "react");
323 	mvprintw(VMSTATROW + 9, VMSTATCOL + 6, "pdwak");
324 	mvprintw(VMSTATROW + 10, VMSTATCOL + 6, "pdpgs");
325 	mvprintw(VMSTATROW + 11, VMSTATCOL + 6, "intrn");
326 	mvprintw(VMSTATROW + 12, VMSTATCOL + 6, "wire");
327 	mvprintw(VMSTATROW + 13, VMSTATCOL + 6, "act");
328 	mvprintw(VMSTATROW + 14, VMSTATCOL + 6, "inact");
329 	mvprintw(VMSTATROW + 15, VMSTATCOL + 6, "laund");
330 	mvprintw(VMSTATROW + 16, VMSTATCOL + 6, "free");
331 	if (LINES - 1 > VMSTATROW + 17)
332 		mvprintw(VMSTATROW + 17, VMSTATCOL + 6, "buf");
333 
334 	mvprintw(GENSTATROW, GENSTATCOL, " Csw  Trp  Sys  Int  Sof  Flt");
335 
336 	mvprintw(GRAPHROW, GRAPHCOL,
337 		"  . %%Sys    . %%Intr   . %%User   . %%Nice   . %%Idle");
338 	mvprintw(PROCSROW, PROCSCOL, "Proc:");
339 	mvprintw(PROCSROW + 1, PROCSCOL, "  r   p   d    s   w");
340 	mvprintw(GRAPHROW + 1, GRAPHCOL,
341 		"|    |    |    |    |    |    |    |    |    |    |");
342 
343 	mvprintw(VNSTATROW, VNSTATCOL + 8, "dtbuf");
344 	mvprintw(VNSTATROW + 1, VNSTATCOL + 8, "maxvn");
345 	mvprintw(VNSTATROW + 2, VNSTATCOL + 8, "numvn");
346 	mvprintw(VNSTATROW + 3, VNSTATCOL + 8, "frevn");
347 
348 	mvprintw(NAMEIROW, NAMEICOL, "Namei     Name-cache   Dir-cache");
349 	mvprintw(NAMEIROW + 1, NAMEICOL,
350 		"   Calls    hits   %%    hits   %%");
351 	dslabel(MAXDRIVES, DISKCOL, DISKROW);
352 
353 	for (i = 0; i < nintr; i++) {
354 		if (intrloc[i] == 0)
355 			continue;
356 		mvprintw(intrloc[i], INTSCOL + 6, "%-10.10s", intrname[i]);
357 	}
358 }
359 
360 #define X(fld)	{t=s.fld[i]; s.fld[i]-=s1.fld[i]; if(state==TIME) s1.fld[i]=t;}
361 #define Q(fld)	{t=cur_dev.fld[i]; cur_dev.fld[i]-=last_dev.fld[i]; if(state==TIME) last_dev.fld[i]=t;}
362 #define Y(fld)	{t = s.fld; s.fld -= s1.fld; if(state == TIME) s1.fld = t;}
363 #define Z(fld)	{t = s.nchstats.fld; s.nchstats.fld -= s1.nchstats.fld; \
364 	if(state == TIME) s1.nchstats.fld = t;}
365 #define PUTRATE(fld, l, c, w) \
366 do { \
367 	Y(fld); \
368 	sysputwuint64(wnd, l, c, w, (s.fld/etime + 0.5), 0); \
369 } while (0)
370 #define MAXFAIL 5
371 
372 static	char cpuchar[CPUSTATES] = { '=' , '+', '>', '-', ' ' };
373 static	char cpuorder[CPUSTATES] = { CP_SYS, CP_INTR, CP_USER, CP_NICE,
374 				     CP_IDLE };
375 
376 void
377 showkre(void)
378 {
379 	float f1, f2;
380 	int psiz, inttotal;
381 	int i, l, lc;
382 	static int failcnt = 0;
383 
384 	etime = 0;
385 	for(i = 0; i < CPUSTATES; i++) {
386 		X(time);
387 		Q(cp_time);
388 		etime += s.time[i];
389 	}
390 	if (etime < 5.0) {	/* < 5 ticks - ignore this trash */
391 		if (failcnt++ >= MAXFAIL) {
392 			clear();
393 			mvprintw(2, 10, "The alternate system clock has died!");
394 			mvprintw(3, 10, "Reverting to ``pigs'' display.");
395 			move(CMDLINE, 0);
396 			refresh();
397 			failcnt = 0;
398 			sleep(5);
399 			command("pigs");
400 		}
401 		return;
402 	}
403 	failcnt = 0;
404 	etime /= hertz;
405 	etime /= ncpu;
406 	inttotal = 0;
407 	for (i = 0; i < nintr; i++) {
408 		if (s.intrcnt[i] == 0)
409 			continue;
410 		X(intrcnt);
411 		l = (int)((float)s.intrcnt[i]/etime + 0.5);
412 		inttotal += l;
413 		if (intrloc[i] == 0) {
414 			if (nextintsrow == LINES)
415 				continue;
416 			intrloc[i] = nextintsrow++;
417 			mvprintw(intrloc[i], INTSCOL + 6, "%-10.10s",
418 				intrname[i]);
419 		}
420 		putint(l, intrloc[i], INTSCOL, 5);
421 	}
422 	putint(inttotal, INTSROW + 1, INTSCOL, 5);
423 	Z(ncs_goodhits); Z(ncs_badhits); Z(ncs_miss);
424 	Z(ncs_long); Z(ncs_pass2); Z(ncs_2passes); Z(ncs_neghits);
425 	s.nchcount = nchtotal.ncs_goodhits + nchtotal.ncs_badhits +
426 	    nchtotal.ncs_miss + nchtotal.ncs_long + nchtotal.ncs_neghits;
427 	if (state == TIME)
428 		s1.nchcount = s.nchcount;
429 
430 	psiz = 0;
431 	f2 = 0.0;
432 	for (lc = 0; lc < CPUSTATES; lc++) {
433 		i = cpuorder[lc];
434 		f1 = cputime(i);
435 		f2 += f1;
436 		l = (int) ((f2 + 1.0) / 2.0) - psiz;
437 		putfloat(f1, GRAPHROW, GRAPHCOL + 10 * lc, 4, 1, 0);
438 		move(GRAPHROW + 2, psiz);
439 		psiz += l;
440 		while (l-- > 0)
441 			addch(cpuchar[lc]);
442 	}
443 
444 	putint(ucount(), STATROW, STATCOL, 5);
445 	putfloat(avenrun[0], STATROW, STATCOL + 20, 5, 2, 0);
446 	putfloat(avenrun[1], STATROW, STATCOL + 26, 5, 2, 0);
447 	putfloat(avenrun[2], STATROW, STATCOL + 32, 5, 2, 0);
448 	mvaddstr(STATROW, STATCOL + 55, buf);
449 	putfloat(100.0 * (v_page_count - total.t_free) / v_page_count,
450 	   STATROW + 1, STATCOL + 15, 2, 0, 1);
451 	putfloat(100.0 * s.v_kmem_map_size / kmem_size,
452 	   STATROW + 1, STATCOL + 22, 2, 0, 1);
453 
454 	sysputpage(wnd, MEMROW + 2, MEMCOL + 4, 6, total.t_arm, 0);
455 	sysputpage(wnd, MEMROW + 2, MEMCOL + 12, 6, total.t_armshr, 0);
456 	sysputpage(wnd, MEMROW + 2, MEMCOL + 20, 6, total.t_avm, 0);
457 	sysputpage(wnd, MEMROW + 2, MEMCOL + 29, 6, total.t_avmshr, 0);
458 	sysputpage(wnd, MEMROW + 3, MEMCOL + 4, 6, total.t_rm, 0);
459 	sysputpage(wnd, MEMROW + 3, MEMCOL + 12, 6, total.t_rmshr, 0);
460 	sysputpage(wnd, MEMROW + 3, MEMCOL + 20, 6, total.t_vm, 0);
461 	sysputpage(wnd, MEMROW + 3, MEMCOL + 29, 6, total.t_vmshr, 0);
462 	sysputpage(wnd, MEMROW + 2, MEMCOL + 38, 6, total.t_free, 0);
463 	putint(total.t_rq - 1, PROCSROW + 2, PROCSCOL, 3);
464 	putint(total.t_pw, PROCSROW + 2, PROCSCOL + 4, 3);
465 	putint(total.t_dw, PROCSROW + 2, PROCSCOL + 8, 3);
466 	putint(total.t_sl, PROCSROW + 2, PROCSCOL + 12, 4);
467 	putint(total.t_sw, PROCSROW + 2, PROCSCOL + 17, 3);
468 	PUTRATE(v_io_faults, VMSTATROW, VMSTATCOL, 5);
469 	PUTRATE(v_cow_faults, VMSTATROW + 1, VMSTATCOL, 5);
470 	PUTRATE(v_zfod, VMSTATROW + 2, VMSTATCOL, 5);
471 	PUTRATE(v_ozfod, VMSTATROW + 3, VMSTATCOL, 5);
472 	putint(s.v_zfod != 0 ? (int)(s.v_ozfod * 100.0 / s.v_zfod) : 0,
473 	    VMSTATROW + 4, VMSTATCOL, 5);
474 	PUTRATE(v_dfree, VMSTATROW + 5, VMSTATCOL, 5);
475 	PUTRATE(v_pfree, VMSTATROW + 6, VMSTATCOL, 5);
476 	PUTRATE(v_tfree, VMSTATROW + 7, VMSTATCOL, 5);
477 	PUTRATE(v_reactivated, VMSTATROW + 8, VMSTATCOL, 5);
478 	PUTRATE(v_pdwakeups, VMSTATROW + 9, VMSTATCOL, 5);
479 	PUTRATE(v_pdpages, VMSTATROW + 10, VMSTATCOL, 5);
480 	PUTRATE(v_intrans, VMSTATROW + 11, VMSTATCOL, 5);
481 	sysputpage(wnd, VMSTATROW + 12, VMSTATCOL, 5, s.v_wire_count, 0);
482 	sysputpage(wnd, VMSTATROW + 13, VMSTATCOL, 5, s.v_active_count, 0);
483 	sysputpage(wnd, VMSTATROW + 14, VMSTATCOL, 5, s.v_inactive_count, 0);
484 	sysputpage(wnd, VMSTATROW + 15, VMSTATCOL, 5, s.v_laundry_count, 0);
485 	sysputpage(wnd, VMSTATROW + 16, VMSTATCOL, 5, s.v_free_count, 0);
486 	if (LINES - 1 > VMSTATROW + 17)
487 		sysputuint64(wnd, VMSTATROW + 17, VMSTATCOL, 5, s.bufspace, 0);
488 	PUTRATE(v_vnodein, PAGEROW + 2, PAGECOL + 6, 5);
489 	PUTRATE(v_vnodeout, PAGEROW + 2, PAGECOL + 12, 5);
490 	PUTRATE(v_swapin, PAGEROW + 2, PAGECOL + 19, 5);
491 	PUTRATE(v_swapout, PAGEROW + 2, PAGECOL + 25, 5);
492 	PUTRATE(v_vnodepgsin, PAGEROW + 3, PAGECOL + 6, 5);
493 	PUTRATE(v_vnodepgsout, PAGEROW + 3, PAGECOL + 12, 5);
494 	PUTRATE(v_swappgsin, PAGEROW + 3, PAGECOL + 19, 5);
495 	PUTRATE(v_swappgsout, PAGEROW + 3, PAGECOL + 25, 5);
496 	PUTRATE(v_swtch, GENSTATROW + 1, GENSTATCOL, 4);
497 	PUTRATE(v_trap, GENSTATROW + 1, GENSTATCOL + 5, 4);
498 	PUTRATE(v_syscall, GENSTATROW + 1, GENSTATCOL + 10, 4);
499 	PUTRATE(v_intr, GENSTATROW + 1, GENSTATCOL + 15, 4);
500 	PUTRATE(v_soft, GENSTATROW + 1, GENSTATCOL + 20, 4);
501 	PUTRATE(v_vm_faults, GENSTATROW + 1, GENSTATCOL + 25, 4);
502 	switch(state) {
503 	case TIME:
504 		dsshow(MAXDRIVES, DISKCOL, DISKROW, &cur_dev, &last_dev);
505 		break;
506 	case RUN:
507 		dsshow(MAXDRIVES, DISKCOL, DISKROW, &cur_dev, &run_dev);
508 		break;
509 	case BOOT:
510 		dsshow(MAXDRIVES, DISKCOL, DISKROW, &cur_dev, NULL);
511 		break;
512 	}
513 	putint(s.numdirtybuffers, VNSTATROW, VNSTATCOL, 7);
514 	putint(s.maxvnodes, VNSTATROW + 1, VNSTATCOL, 7);
515 	putint(s.numvnodes, VNSTATROW + 2, VNSTATCOL, 7);
516 	putint(s.freevnodes, VNSTATROW + 3, VNSTATCOL, 7);
517 	putint(s.nchcount, NAMEIROW + 2, NAMEICOL, 8);
518 	putint((nchtotal.ncs_goodhits + nchtotal.ncs_neghits),
519 	   NAMEIROW + 2, NAMEICOL + 9, 7);
520 #define nz(x)	((x) ? (x) : 1)
521 	putfloat((nchtotal.ncs_goodhits+nchtotal.ncs_neghits) *
522 	   100.0 / nz(s.nchcount),
523 	   NAMEIROW + 2, NAMEICOL + 17, 3, 0, 1);
524 	putint(nchtotal.ncs_pass2, NAMEIROW + 2, NAMEICOL + 21, 7);
525 	putfloat(nchtotal.ncs_pass2 * 100.0 / nz(s.nchcount),
526 	   NAMEIROW + 2, NAMEICOL + 29, 3, 0, 1);
527 #undef nz
528 }
529 
530 int
531 cmdkre(const char *cmd, const char *args)
532 {
533 	int retval;
534 
535 	if (prefix(cmd, "run")) {
536 		retval = 1;
537 		copyinfo(&s2, &s1);
538 		switch (devstat_getdevs(NULL, &run_dev)) {
539 		case -1:
540 			errx(1, "%s", devstat_errbuf);
541 			break;
542 		case 1:
543 			num_devices = run_dev.dinfo->numdevs;
544 			generation = run_dev.dinfo->generation;
545 			retval = dscmd("refresh", NULL, MAXDRIVES, &cur_dev);
546 			if (retval == 2)
547 				labelkre();
548 			break;
549 		default:
550 			break;
551 		}
552 		state = RUN;
553 		return (retval);
554 	}
555 	if (prefix(cmd, "boot")) {
556 		state = BOOT;
557 		copyinfo(&z, &s1);
558 		return (1);
559 	}
560 	if (prefix(cmd, "time")) {
561 		state = TIME;
562 		return (1);
563 	}
564 	if (prefix(cmd, "zero")) {
565 		retval = 1;
566 		if (state == RUN) {
567 			getinfo(&s1);
568 			switch (devstat_getdevs(NULL, &run_dev)) {
569 			case -1:
570 				errx(1, "%s", devstat_errbuf);
571 				break;
572 			case 1:
573 				num_devices = run_dev.dinfo->numdevs;
574 				generation = run_dev.dinfo->generation;
575 				retval = dscmd("refresh",NULL, MAXDRIVES, &cur_dev);
576 				if (retval == 2)
577 					labelkre();
578 				break;
579 			default:
580 				break;
581 			}
582 		}
583 		return (retval);
584 	}
585 	retval = dscmd(cmd, args, MAXDRIVES, &cur_dev);
586 
587 	if (retval == 2)
588 		labelkre();
589 
590 	return(retval);
591 }
592 
593 /* calculate number of users on the system */
594 static int
595 ucount(void)
596 {
597 	int nusers = 0;
598 	struct utmpx *ut;
599 
600 	setutxent();
601 	while ((ut = getutxent()) != NULL)
602 		if (ut->ut_type == USER_PROCESS)
603 			nusers++;
604 	endutxent();
605 
606 	return (nusers);
607 }
608 
609 static float
610 cputime(int indx)
611 {
612 	double lt;
613 	int i;
614 
615 	lt = 0;
616 	for (i = 0; i < CPUSTATES; i++)
617 		lt += s.time[i];
618 	if (lt == 0.0)
619 		lt = 1.0;
620 	return (s.time[indx] * 100.0 / lt);
621 }
622 
623 void
624 putint(int n, int l, int lc, int w)
625 {
626 
627 	do_putuint64(n, l, lc, w, SI);
628 }
629 
630 static void
631 do_putuint64(uint64_t n, int l, int lc, int w, int div)
632 {
633 	int snr;
634 	char b[128];
635 	char lbuf[128];
636 
637 	move(l, lc);
638 #ifdef DEBUG
639 		while (w-- > 0)
640 			addch('*');
641 		return;
642 #endif
643 	if (n == 0) {
644 		while (w-- > 0)
645 			addch(' ');
646 		return;
647 	}
648 	snr = snprintf(b, sizeof(b), "%*ju", w, (uintmax_t)n);
649 	if (snr != w) {
650 		humanize_number(lbuf, w, n, "", HN_AUTOSCALE,
651 		    HN_NOSPACE | HN_DECIMAL | div);
652 		snr = snprintf(b, sizeof(b), "%*s", w, lbuf);
653 	}
654 	if (snr != w) {
655 		while (w-- > 0)
656 			addch('*');
657 		return;
658 	}
659 	addstr(b);
660 }
661 
662 void
663 putfloat(double f, int l, int lc, int w, int d, int nz)
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 (nz && f == 0.0) {
675 		while (--w >= 0)
676 			addch(' ');
677 		return;
678 	}
679 	snr = snprintf(b, sizeof(b), "%*.*f", w, d, f);
680 	if (snr != w)
681 		snr = snprintf(b, sizeof(b), "%*.0f", w, f);
682 	if (snr != w)
683 		snr = snprintf(b, sizeof(b), "%*.0fk", w - 1, f / 1000);
684 	if (snr != w)
685 		snr = snprintf(b, sizeof(b), "%*.0fM", w - 1, f / 1000000);
686 	if (snr != w) {
687 		while (--w >= 0)
688 			addch('*');
689 		return;
690 	}
691 	addstr(b);
692 }
693 
694 void
695 putlongdouble(long double f, int l, int lc, int w, int d, int nz)
696 {
697 	int snr;
698 	char b[128];
699 
700 	move(l, lc);
701 #ifdef DEBUG
702 		while (--w >= 0)
703 			addch('*');
704 		return;
705 #endif
706 	if (nz && f == 0.0) {
707 		while (--w >= 0)
708 			addch(' ');
709 		return;
710 	}
711 	snr = snprintf(b, sizeof(b), "%*.*Lf", w, d, f);
712 	if (snr != w)
713 		snr = snprintf(b, sizeof(b), "%*.0Lf", w, f);
714 	if (snr != w)
715 		snr = snprintf(b, sizeof(b), "%*.0Lfk", w - 1, f / 1000);
716 	if (snr != w)
717 		snr = snprintf(b, sizeof(b), "%*.0LfM", w - 1, f / 1000000);
718 	if (snr != w) {
719 		while (--w >= 0)
720 			addch('*');
721 		return;
722 	}
723 	addstr(b);
724 }
725 
726 static void
727 getinfo(struct Info *ls)
728 {
729 	struct devinfo *tmp_dinfo;
730 	size_t size;
731 	int mib[2];
732 
733 	GETSYSCTL("kern.cp_time", ls->time);
734 	GETSYSCTL("kern.cp_time", cur_dev.cp_time);
735 	GETSYSCTL("vm.stats.sys.v_swtch", ls->v_swtch);
736 	GETSYSCTL("vm.stats.sys.v_trap", ls->v_trap);
737 	GETSYSCTL("vm.stats.sys.v_syscall", ls->v_syscall);
738 	GETSYSCTL("vm.stats.sys.v_intr", ls->v_intr);
739 	GETSYSCTL("vm.stats.sys.v_soft", ls->v_soft);
740 	GETSYSCTL("vm.stats.vm.v_vm_faults", ls->v_vm_faults);
741 	GETSYSCTL("vm.stats.vm.v_io_faults", ls->v_io_faults);
742 	GETSYSCTL("vm.stats.vm.v_cow_faults", ls->v_cow_faults);
743 	GETSYSCTL("vm.stats.vm.v_zfod", ls->v_zfod);
744 	GETSYSCTL("vm.stats.vm.v_ozfod", ls->v_ozfod);
745 	GETSYSCTL("vm.stats.vm.v_swapin", ls->v_swapin);
746 	GETSYSCTL("vm.stats.vm.v_swapout", ls->v_swapout);
747 	GETSYSCTL("vm.stats.vm.v_swappgsin", ls->v_swappgsin);
748 	GETSYSCTL("vm.stats.vm.v_swappgsout", ls->v_swappgsout);
749 	GETSYSCTL("vm.stats.vm.v_vnodein", ls->v_vnodein);
750 	GETSYSCTL("vm.stats.vm.v_vnodeout", ls->v_vnodeout);
751 	GETSYSCTL("vm.stats.vm.v_vnodepgsin", ls->v_vnodepgsin);
752 	GETSYSCTL("vm.stats.vm.v_vnodepgsout", ls->v_vnodepgsout);
753 	GETSYSCTL("vm.stats.vm.v_intrans", ls->v_intrans);
754 	GETSYSCTL("vm.stats.vm.v_reactivated", ls->v_reactivated);
755 	GETSYSCTL("vm.stats.vm.v_pdwakeups", ls->v_pdwakeups);
756 	GETSYSCTL("vm.stats.vm.v_pdpages", ls->v_pdpages);
757 	GETSYSCTL("vm.stats.vm.v_dfree", ls->v_dfree);
758 	GETSYSCTL("vm.stats.vm.v_pfree", ls->v_pfree);
759 	GETSYSCTL("vm.stats.vm.v_tfree", ls->v_tfree);
760 	GETSYSCTL("vm.stats.vm.v_free_count", ls->v_free_count);
761 	GETSYSCTL("vm.stats.vm.v_wire_count", ls->v_wire_count);
762 	GETSYSCTL("vm.stats.vm.v_active_count", ls->v_active_count);
763 	GETSYSCTL("vm.stats.vm.v_inactive_count", ls->v_inactive_count);
764 	GETSYSCTL("vm.stats.vm.v_laundry_count", ls->v_laundry_count);
765 	GETSYSCTL("vfs.bufspace", ls->bufspace);
766 	GETSYSCTL("kern.maxvnodes", ls->maxvnodes);
767 	GETSYSCTL("vfs.numvnodes", ls->numvnodes);
768 	GETSYSCTL("vfs.freevnodes", ls->freevnodes);
769 	GETSYSCTL("vfs.cache.nchstats", ls->nchstats);
770 	GETSYSCTL("vfs.numdirtybuffers", ls->numdirtybuffers);
771 	GETSYSCTL("vm.kmem_map_size", ls->v_kmem_map_size);
772 	getsysctl("hw.intrcnt", ls->intrcnt, nintr * sizeof(u_long));
773 
774 	size = sizeof(ls->Total);
775 	mib[0] = CTL_VM;
776 	mib[1] = VM_TOTAL;
777 	if (sysctl(mib, 2, &ls->Total, &size, NULL, 0) < 0) {
778 		error("Can't get kernel info: %s\n", strerror(errno));
779 		bzero(&ls->Total, sizeof(ls->Total));
780 	}
781 	size = sizeof(ncpu);
782 	if (sysctlbyname("hw.ncpu", &ncpu, &size, NULL, 0) < 0 ||
783 	    size != sizeof(ncpu))
784 		ncpu = 1;
785 
786 	tmp_dinfo = last_dev.dinfo;
787 	last_dev.dinfo = cur_dev.dinfo;
788 	cur_dev.dinfo = tmp_dinfo;
789 
790 	last_dev.snap_time = cur_dev.snap_time;
791 	dsgetinfo(&cur_dev);
792 }
793 
794 static void
795 allocinfo(struct Info *ls)
796 {
797 
798 	ls->intrcnt = (long *) calloc(nintr, sizeof(long));
799 	if (ls->intrcnt == NULL)
800 		errx(2, "out of memory");
801 }
802 
803 static void
804 copyinfo(struct Info *from, struct Info *to)
805 {
806 	long *intrcnt;
807 
808 	/*
809 	 * time, wds, seek, and xfer are malloc'd so we have to
810 	 * save the pointers before the structure copy and then
811 	 * copy by hand.
812 	 */
813 	intrcnt = to->intrcnt;
814 	*to = *from;
815 
816 	bcopy(from->intrcnt, to->intrcnt = intrcnt, nintr * sizeof (int));
817 }
818