usr.bin/systat/vmstat.c

   1 /*-
   2  * Copyright (c) 1983, 1989, 1992, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#)vmstat.c 8.2 (Berkeley) 1/12/94
  34  * $FreeBSD: src/usr.bin/systat/vmstat.c,v 1.38.2.4 2002/03/12 19:50:23 phantom Exp $
  35  * $DragonFly: src/usr.bin/systat/vmstat.c,v 1.9 2005/10/13 00:04:48 dillon Exp $
  36  */
  37
  38 /*
  39  * Cursed vmstat -- from Robert Elz.
  40  */
  41
  42 #define _KERNEL_STRUCTURES
  43 #include <sys/param.h>
  44 #include <sys/stat.h>
  45 #include <sys/time.h>
  46 #include <sys/user.h>
  47 #include <sys/uio.h>
  48 #include <sys/namei.h>
  49 #include <sys/sysctl.h>
  50 #include <sys/vmmeter.h>
  51
  52 #include <vm/vm_param.h>
  53
  54 #include <ctype.h>
  55 #include <err.h>
  56 #include <errno.h>
  57 #include <kinfo.h>
  58 #include <langinfo.h>
  59 #include <nlist.h>
  60 #include <paths.h>
  61 #include <signal.h>
  62 #include <stddef.h>
  63 #include <stdlib.h>
  64 #include <string.h>
  65 #include <time.h>
  66 #include <unistd.h>
  67 #include <utmp.h>
  68 #include <devstat.h>
  69 #include "systat.h"
  70 #include "extern.h"
  71 #include "devs.h"
  72
  73 static struct Info {
  74         struct kinfo_cputime cp_time;
  75         struct  vmmeter Vmm;
  76         struct  vmtotal Total;
  77         struct  vmstats Vms;
  78         struct  nchstats nchstats;
  79         long    nchcount;
  80         long    *intrcnt;
  81         int     bufspace;
  82         int     desiredvnodes;
  83         long    numvnodes;
  84         long    freevnodes;
  85         long    numdirtybuffers;
  86 } s, s1, s2, z;
  87
  88 struct kinfo_cputime cp_time, old_cp_time;
  89 struct statinfo cur, last, run;
  90
  91 #define vmm s.Vmm
  92 #define vms s.Vms
  93 #define oldvmm s1.Vmm
  94 #define oldvms s1.Vms
  95 #define total s.Total
  96 #define nchtotal s.nchstats
  97 #define oldnchtotal s1.nchstats
  98
  99 static  enum state { BOOT, TIME, RUN } state = TIME;
 100
 101 static void allocinfo(struct Info *);
 102 static void copyinfo(struct Info *, struct Info *);
 103 static void dinfo(int, int, struct statinfo *, struct statinfo *);
 104 static void getinfo(struct Info *, enum state);
 105 static void putint(int, int, int, int);
 106 static void putfloat(double, int, int, int, int, int);
 107 static void putlongdouble(long double, int, int, int, int, int);
 108 static int ucount(void);
 109
 110 static  int ncpu;
 111 static  int ut;
 112 static  char buf[26];
 113 static  time_t t;
 114 static  double etime;
 115 static  int nintr;
 116 static  long *intrloc;
 117 static  char **intrname;
 118 static  int nextintsrow;
 119 static  int extended_vm_stats;
 120
 121 struct  utmp utmp;
 122
 123
 124 WINDOW *
 125 openkre(void)
 126 {
 127
 128         ut = open(_PATH_UTMP, O_RDONLY);
 129         if (ut < 0)
 130                 error("No utmp");
 131         return (stdscr);
 132 }
 133
 134 void
 135 closekre(WINDOW *w)
 136 {
 137
 138         (void) close(ut);
 139         if (w == NULL)
 140                 return;
 141         wclear(w);
 142         wrefresh(w);
 143 }
 144
 145
 146 static struct nlist namelist[] = {
 147 #define X_BUFFERSPACE   0
 148         { "_bufspace" },
 149 #define X_NCHSTATS      1
 150         { "_nchstats" },
 151 #define X_DESIREDVNODES 2
 152         { "_desiredvnodes" },
 153 #define X_NUMVNODES     3
 154         { "_numvnodes" },
 155 #define X_FREEVNODES    4
 156         { "_freevnodes" },
 157 #define X_NUMDIRTYBUFFERS 5
 158         { "_numdirtybuffers" },
 159         { "" },
 160 };
 161
 162 /*
 163  * These constants define where the major pieces are laid out
 164  */
 165 #define STATROW          0      /* uses 1 row and 68 cols */
 166 #define STATCOL          2
 167 #define MEMROW           2      /* uses 4 rows and 31 cols */
 168 #define MEMCOL           0
 169 #define PAGEROW          2      /* uses 4 rows and 26 cols */
 170 #define PAGECOL         46
 171 #define INTSROW          6      /* uses all rows to bottom and 17 cols */
 172 #define INTSCOL         61
 173 #define PROCSROW         7      /* uses 2 rows and 20 cols */
 174 #define PROCSCOL         0
 175 #define GENSTATROW       7      /* uses 2 rows and 30 cols */
 176 #define GENSTATCOL      20
 177 #define VMSTATROW        6      /* uses 17 rows and 12 cols */
 178 #define VMSTATCOL       48
 179 #define GRAPHROW        10      /* uses 3 rows and 51 cols */
 180 #define GRAPHCOL         0
 181 #define NAMEIROW        14      /* uses 3 rows and 38 cols */
 182 #define NAMEICOL         0
 183 #define DISKROW         18      /* uses 5 rows and 50 cols (for 9 drives) */
 184 #define DISKCOL          0
 185
 186 #define DRIVESPACE       7      /* max # for space */
 187
 188 #define MAXDRIVES       DRIVESPACE       /* max # to display */
 189
 190 int
 191 initkre(void)
 192 {
 193         char *intrnamebuf;
 194         size_t bytes;
 195         size_t b;
 196         size_t i;
 197
 198         if (namelist[0].n_type == 0) {
 199                 if (kvm_nlist(kd, namelist)) {
 200                         nlisterr(namelist);
 201                         return(0);
 202                 }
 203                 if (namelist[0].n_type == 0) {
 204                         error("No namelist");
 205                         return(0);
 206                 }
 207         }
 208
 209         if ((num_devices = getnumdevs()) < 0) {
 210                 warnx("%s", devstat_errbuf);
 211                 return(0);
 212         }
 213
 214         cur.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
 215         last.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
 216         run.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
 217         bzero(cur.dinfo, sizeof(struct devinfo));
 218         bzero(last.dinfo, sizeof(struct devinfo));
 219         bzero(run.dinfo, sizeof(struct devinfo));
 220
 221         if (dsinit(MAXDRIVES, &cur, &last, &run) != 1)
 222                 return(0);
 223
 224         if (nintr == 0) {
 225                 if (sysctlbyname("hw.intrnames", NULL, &bytes, NULL, 0) == 0) {
 226                         intrnamebuf = malloc(bytes);
 227                         sysctlbyname("hw.intrnames", intrnamebuf, &bytes,
 228                                         NULL, 0);
 229                         for (i = 0; i < bytes; ++i) {
 230                             if (intrnamebuf[i] == 0)
 231                                 ++nintr;
 232                         }
 233                         intrname = malloc(nintr * sizeof(char *));
 234                         intrloc = malloc(nintr * sizeof(*intrloc));
 235                         nintr = 0;
 236                         for (b = i = 0; i < bytes; ++i) {
 237                             if (intrnamebuf[i] == 0) {
 238                                 intrname[nintr] = intrnamebuf + b;
 239                                 intrloc[nintr] = 0;
 240                                 b = i + 1;
 241                                 ++nintr;
 242                             }
 243                         }
 244                 }
 245                 nextintsrow = INTSROW + 2;
 246                 allocinfo(&s);
 247                 allocinfo(&s1);
 248                 allocinfo(&s2);
 249                 allocinfo(&z);
 250         }
 251         getinfo(&s2, RUN);
 252         copyinfo(&s2, &s1);
 253         return(1);
 254 }
 255
 256 void
 257 fetchkre(void)
 258 {
 259         time_t now;
 260         struct tm *tp;
 261         static int d_first = -1;
 262
 263         if (d_first < 0)
 264                 d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
 265
 266         time(&now);
 267         tp = localtime(&now);
 268         (void) strftime(buf, sizeof(buf),
 269                         d_first ? "%e %b %R" : "%b %e %R", tp);
 270         getinfo(&s, state);
 271 }
 272
 273 void
 274 labelkre(void)
 275 {
 276         register int i, j;
 277
 278         clear();
 279         mvprintw(STATROW, STATCOL + 4, "users    Load");
 280         mvprintw(MEMROW, MEMCOL, "Mem:KB    REAL            VIRTUAL");
 281         mvprintw(MEMROW + 1, MEMCOL, "        Tot   Share      Tot    Share");
 282         mvprintw(MEMROW + 2, MEMCOL, "Act");
 283         mvprintw(MEMROW + 3, MEMCOL, "All");
 284
 285         mvprintw(MEMROW + 1, MEMCOL + 41, "Free");
 286
 287         mvprintw(PAGEROW, PAGECOL,     "        VN PAGER  SWAP PAGER ");
 288         mvprintw(PAGEROW + 1, PAGECOL, "        in  out     in  out ");
 289         mvprintw(PAGEROW + 2, PAGECOL, "count");
 290         mvprintw(PAGEROW + 3, PAGECOL, "pages");
 291
 292         mvprintw(INTSROW, INTSCOL + 3, " Interrupts");
 293         mvprintw(INTSROW + 1, INTSCOL + 9, "total");
 294
 295         mvprintw(VMSTATROW + 1, VMSTATCOL + 10, "cow");
 296         mvprintw(VMSTATROW + 2, VMSTATCOL + 10, "wire");
 297         mvprintw(VMSTATROW + 3, VMSTATCOL + 10, "act");
 298         mvprintw(VMSTATROW + 4, VMSTATCOL + 10, "inact");
 299         mvprintw(VMSTATROW + 5, VMSTATCOL + 10, "cache");
 300         mvprintw(VMSTATROW + 6, VMSTATCOL + 10, "free");
 301         mvprintw(VMSTATROW + 7, VMSTATCOL + 10, "daefr");
 302         mvprintw(VMSTATROW + 8, VMSTATCOL + 10, "prcfr");
 303         mvprintw(VMSTATROW + 9, VMSTATCOL + 10, "react");
 304         mvprintw(VMSTATROW + 10, VMSTATCOL + 10, "pdwake");
 305         mvprintw(VMSTATROW + 11, VMSTATCOL + 10, "pdpgs");
 306         mvprintw(VMSTATROW + 12, VMSTATCOL + 10, "intrn");
 307         mvprintw(VMSTATROW + 13, VMSTATCOL + 10, "buf");
 308         mvprintw(VMSTATROW + 14, VMSTATCOL + 10, "dirtybuf");
 309
 310         mvprintw(VMSTATROW + 15, VMSTATCOL + 10, "desiredvnodes");
 311         mvprintw(VMSTATROW + 16, VMSTATCOL + 10, "numvnodes");
 312         mvprintw(VMSTATROW + 17, VMSTATCOL + 10, "freevnodes");
 313
 314         mvprintw(GENSTATROW, GENSTATCOL, "  Csw  Trp  Sys  Int  Sof  Flt");
 315
 316         mvprintw(GRAPHROW, GRAPHCOL,
 317                 "  . %%Sys    . %%Intr   . %%User   . %%Nice   . %%Idle");
 318         mvprintw(PROCSROW, PROCSCOL, "Proc:r  p  d  s  w");
 319         mvprintw(GRAPHROW + 1, GRAPHCOL,
 320                 "|    |    |    |    |    |    |    |    |    |    |");
 321
 322         mvprintw(NAMEIROW, NAMEICOL, "Namei         Name-cache    Dir-cache");
 323         mvprintw(NAMEIROW + 1, NAMEICOL,
 324                 "    Calls     hits    %%     hits    %%");
 325         mvprintw(DISKROW, DISKCOL, "Disks");
 326         mvprintw(DISKROW + 1, DISKCOL, "KB/t");
 327         mvprintw(DISKROW + 2, DISKCOL, "tps");
 328         mvprintw(DISKROW + 3, DISKCOL, "MB/s");
 329         mvprintw(DISKROW + 4, DISKCOL, "%% busy");
 330         /*
 331          * For now, we don't support a fourth disk statistic.  So there's
 332          * no point in providing a label for it.  If someone can think of a
 333          * fourth useful disk statistic, there is room to add it.
 334          */
 335         /* mvprintw(DISKROW + 4, DISKCOL, " msps"); */
 336         j = 0;
 337         for (i = 0; i < num_devices && j < MAXDRIVES; i++)
 338                 if (dev_select[i].selected) {
 339                         char tmpstr[80];
 340                         sprintf(tmpstr, "%s%d", dev_select[i].device_name,
 341                                 dev_select[i].unit_number);
 342                         mvprintw(DISKROW, DISKCOL + 5 + 6 * j,
 343                                 " %5.5s", tmpstr);
 344                         j++;
 345                 }
 346
 347         if (j <= 4) {
 348                 /*
 349                  * room for extended VM stats
 350                  */
 351                 mvprintw(VMSTATROW + 11, VMSTATCOL - 6, "zfod");
 352                 mvprintw(VMSTATROW + 12, VMSTATCOL - 6, "ofod");
 353                 mvprintw(VMSTATROW + 13, VMSTATCOL - 6, "%%slo-z");
 354                 mvprintw(VMSTATROW + 14, VMSTATCOL - 6, "tfree");
 355                 extended_vm_stats = 1;
 356         } else {
 357                 extended_vm_stats = 0;
 358                 mvprintw(VMSTATROW + 0, VMSTATCOL + 10, "zfod");
 359         }
 360
 361         for (i = 0; i < nintr; i++) {
 362                 if (intrloc[i] == 0)
 363                         continue;
 364                 mvprintw(intrloc[i], INTSCOL + 9, "%-10.10s", intrname[i]);
 365         }
 366 }
 367
 368 #define CP_UPDATE(fld)  do {    \
 369         uint64_t t;             \
 370         t=s.fld;                \
 371         s.fld-=s1.fld;          \
 372         if(state==TIME)         \
 373                 s1.fld=t;       \
 374         t=fld;                  \
 375         fld-=old_##fld;         \
 376         if(state==TIME)         \
 377                 old_##fld=t;    \
 378         etime += s.fld;         \
 379 } while(0)
 380 #define X(fld)  {t=s.fld[i]; s.fld[i]-=s1.fld[i]; if(state==TIME) s1.fld[i]=t;}
 381 #define Y(fld)  {t = s.fld; s.fld -= s1.fld; if(state == TIME) s1.fld = t;}
 382 #define Z(fld)  {t = s.nchstats.fld; s.nchstats.fld -= s1.nchstats.fld; \
 383         if(state == TIME) s1.nchstats.fld = t;}
 384 #define PUTRATE(fld, l, c, w) \
 385         Y(fld); \
 386         putint((int)((float)s.fld/etime + 0.5), l, c, w)
 387 #define MAXFAIL 5
 388
 389 #define CPUSTATES 5
 390 static  const char cpuchar[5] = { '=' , '+', '>', '-', ' ' };
 391
 392 static  const size_t cpuoffsets[] = {
 393         offsetof(struct kinfo_cputime, cp_sys),
 394         offsetof(struct kinfo_cputime, cp_intr),
 395         offsetof(struct kinfo_cputime, cp_user),
 396         offsetof(struct kinfo_cputime, cp_nice),
 397         offsetof(struct kinfo_cputime, cp_idle)
 398 };
 399
 400 void
 401 showkre(void)
 402 {
 403         float f1, f2;
 404         int psiz, inttotal;
 405         int i, l, c;
 406         static int failcnt = 0;
 407         double total_time;
 408
 409         etime = 0;
 410         CP_UPDATE(cp_time.cp_user);
 411         CP_UPDATE(cp_time.cp_nice);
 412         CP_UPDATE(cp_time.cp_sys);
 413         CP_UPDATE(cp_time.cp_intr);
 414         CP_UPDATE(cp_time.cp_idle);
 415
 416         total_time = etime;
 417         if (total_time == 0.0)
 418                 total_time = 1.0;
 419
 420         if (etime < 100000.0) { /* < 100ms ignore this trash */
 421                 if (failcnt++ >= MAXFAIL) {
 422                         clear();
 423                         mvprintw(2, 10, "The alternate system clock has died!");
 424                         mvprintw(3, 10, "Reverting to ``pigs'' display.");
 425                         move(CMDLINE, 0);
 426                         refresh();
 427                         failcnt = 0;
 428                         sleep(5);
 429                         command("pigs");
 430                 }
 431                 return;
 432         }
 433         failcnt = 0;
 434         etime /= 1000000.0;
 435         etime /= ncpu;
 436         if (etime == 0)
 437                 etime = 1;
 438         inttotal = 0;
 439         for (i = 0; i < nintr; i++) {
 440                 if (s.intrcnt[i] == 0)
 441                         continue;
 442                 if (intrloc[i] == 0) {
 443                         if (nextintsrow == LINES)
 444                                 continue;
 445                         intrloc[i] = nextintsrow++;
 446                         mvprintw(intrloc[i], INTSCOL + 9, "%-10.10s",
 447                                 intrname[i]);
 448                 }
 449                 X(intrcnt);
 450                 l = (int)((float)s.intrcnt[i]/etime + 0.5);
 451                 inttotal += l;
 452                 putint(l, intrloc[i], INTSCOL + 2, 6);
 453         }
 454         putint(inttotal, INTSROW + 1, INTSCOL + 2, 6);
 455         Z(ncs_goodhits); Z(ncs_badhits); Z(ncs_miss);
 456         Z(ncs_long); Z(ncs_pass2); Z(ncs_2passes); Z(ncs_neghits);
 457         s.nchcount = nchtotal.ncs_goodhits + nchtotal.ncs_badhits +
 458             nchtotal.ncs_miss + nchtotal.ncs_long + nchtotal.ncs_neghits;
 459         if (state == TIME)
 460                 s1.nchcount = s.nchcount;
 461
 462         psiz = 0;
 463         f2 = 0.0;
 464         for (c = 0; c < CPUSTATES; c++) {
 465                 uint64_t val = *(uint64_t *)(((uint8_t *)&s.cp_time) +
 466                     cpuoffsets[c]);
 467                 f1 = 100.0 * val / total_time;
 468                 f2 += f1;
 469                 l = (int) ((f2 + 1.0) / 2.0) - psiz;
 470                 if (f1 > 99.9)
 471                         f1 = 99.9;      /* no room to display 100.0 */
 472                 putfloat(f1, GRAPHROW, GRAPHCOL + 10 * c, 4, 1, 0);
 473                 move(GRAPHROW + 2, psiz);
 474                 psiz += l;
 475                 while (l-- > 0)
 476                         addch(cpuchar[c]);
 477         }
 478
 479         putint(ucount(), STATROW, STATCOL, 3);
 480         putfloat(avenrun[0], STATROW, STATCOL + 17, 6, 2, 0);
 481         putfloat(avenrun[1], STATROW, STATCOL + 23, 6, 2, 0);
 482         putfloat(avenrun[2], STATROW, STATCOL + 29, 6, 2, 0);
 483         mvaddstr(STATROW, STATCOL + 53, buf);
 484 #define pgtokb(pg)      ((pg) * vms.v_page_size / 1024)
 485         putint(pgtokb(total.t_arm), MEMROW + 2, MEMCOL + 3, 8);
 486         putint(pgtokb(total.t_armshr), MEMROW + 2, MEMCOL + 11, 8);
 487         putint(pgtokb(total.t_avm), MEMROW + 2, MEMCOL + 19, 9);
 488         putint(pgtokb(total.t_avmshr), MEMROW + 2, MEMCOL + 28, 9);
 489         putint(pgtokb(total.t_rm), MEMROW + 3, MEMCOL + 3, 8);
 490         putint(pgtokb(total.t_rmshr), MEMROW + 3, MEMCOL + 11, 8);
 491         putint(pgtokb(total.t_vm), MEMROW + 3, MEMCOL + 19, 9);
 492         putint(pgtokb(total.t_vmshr), MEMROW + 3, MEMCOL + 28, 9);
 493         putint(pgtokb(total.t_free), MEMROW + 2, MEMCOL + 37, 8);
 494         putint(total.t_rq - 1, PROCSROW + 1, PROCSCOL + 3, 3);
 495         putint(total.t_pw, PROCSROW + 1, PROCSCOL + 6, 3);
 496         putint(total.t_dw, PROCSROW + 1, PROCSCOL + 9, 3);
 497         putint(total.t_sl, PROCSROW + 1, PROCSCOL + 12, 3);
 498         putint(total.t_sw, PROCSROW + 1, PROCSCOL + 15, 3);
 499         if (extended_vm_stats == 0) {
 500                 PUTRATE(Vmm.v_zfod, VMSTATROW + 0, VMSTATCOL + 4, 5);
 501         }
 502         PUTRATE(Vmm.v_cow_faults, VMSTATROW + 1, VMSTATCOL + 3, 6);
 503         putint(pgtokb(vms.v_wire_count), VMSTATROW + 2, VMSTATCOL, 9);
 504         putint(pgtokb(vms.v_active_count), VMSTATROW + 3, VMSTATCOL, 9);
 505         putint(pgtokb(vms.v_inactive_count), VMSTATROW + 4, VMSTATCOL, 9);
 506         putint(pgtokb(vms.v_cache_count), VMSTATROW + 5, VMSTATCOL, 9);
 507         putint(pgtokb(vms.v_free_count), VMSTATROW + 6, VMSTATCOL, 9);
 508         PUTRATE(Vmm.v_dfree, VMSTATROW + 7, VMSTATCOL, 9);
 509         PUTRATE(Vmm.v_pfree, VMSTATROW + 8, VMSTATCOL, 9);
 510         PUTRATE(Vmm.v_reactivated, VMSTATROW + 9, VMSTATCOL, 9);
 511         PUTRATE(Vmm.v_pdwakeups, VMSTATROW + 10, VMSTATCOL, 9);
 512         PUTRATE(Vmm.v_pdpages, VMSTATROW + 11, VMSTATCOL, 9);
 513         PUTRATE(Vmm.v_intrans, VMSTATROW + 12, VMSTATCOL, 9);
 514
 515         if (extended_vm_stats) {
 516             PUTRATE(Vmm.v_zfod, VMSTATROW + 11, VMSTATCOL - 16, 9);
 517             PUTRATE(Vmm.v_ozfod, VMSTATROW + 12, VMSTATCOL - 16, 9);
 518             putint(
 519                 ((s.Vmm.v_ozfod < s.Vmm.v_zfod) ?
 520                     s.Vmm.v_ozfod * 100 / s.Vmm.v_zfod :
 521                     0
 522                 ),
 523                 VMSTATROW + 13,
 524                 VMSTATCOL - 16,
 525                 9
 526             );
 527             PUTRATE(Vmm.v_tfree, VMSTATROW + 14, VMSTATCOL - 16, 9);
 528         }
 529
 530         putint(s.bufspace/1024, VMSTATROW + 13, VMSTATCOL, 9);
 531         putint(s.numdirtybuffers, VMSTATROW + 14, VMSTATCOL, 9);
 532         putint(s.desiredvnodes, VMSTATROW + 15, VMSTATCOL, 9);
 533         putint(s.numvnodes, VMSTATROW + 16, VMSTATCOL, 9);
 534         putint(s.freevnodes, VMSTATROW + 17, VMSTATCOL, 9);
 535         PUTRATE(Vmm.v_vnodein, PAGEROW + 2, PAGECOL + 5, 5);
 536         PUTRATE(Vmm.v_vnodeout, PAGEROW + 2, PAGECOL + 10, 5);
 537         PUTRATE(Vmm.v_swapin, PAGEROW + 2, PAGECOL + 17, 5);
 538         PUTRATE(Vmm.v_swapout, PAGEROW + 2, PAGECOL + 22, 5);
 539         PUTRATE(Vmm.v_vnodepgsin, PAGEROW + 3, PAGECOL + 5, 5);
 540         PUTRATE(Vmm.v_vnodepgsout, PAGEROW + 3, PAGECOL + 10, 5);
 541         PUTRATE(Vmm.v_swappgsin, PAGEROW + 3, PAGECOL + 17, 5);
 542         PUTRATE(Vmm.v_swappgsout, PAGEROW + 3, PAGECOL + 22, 5);
 543         PUTRATE(Vmm.v_swtch, GENSTATROW + 1, GENSTATCOL, 5);
 544         PUTRATE(Vmm.v_trap, GENSTATROW + 1, GENSTATCOL + 5, 5);
 545         PUTRATE(Vmm.v_syscall, GENSTATROW + 1, GENSTATCOL + 10, 5);
 546         PUTRATE(Vmm.v_intr, GENSTATROW + 1, GENSTATCOL + 15, 5);
 547         PUTRATE(Vmm.v_soft, GENSTATROW + 1, GENSTATCOL + 20, 5);
 548         PUTRATE(Vmm.v_vm_faults, GENSTATROW + 1, GENSTATCOL + 25, 5);
 549         mvprintw(DISKROW, DISKCOL + 5, "                              ");
 550         for (i = 0, c = 0; i < num_devices && c < MAXDRIVES; i++)
 551                 if (dev_select[i].selected) {
 552                         char tmpstr[80];
 553                         sprintf(tmpstr, "%s%d", dev_select[i].device_name,
 554                                 dev_select[i].unit_number);
 555                         mvprintw(DISKROW, DISKCOL + 5 + 6 * c,
 556                                 " %5.5s", tmpstr);
 557                         switch(state) {
 558                         case TIME:
 559                                 dinfo(i, ++c, &cur, &last);
 560                                 break;
 561                         case RUN:
 562                                 dinfo(i, ++c, &cur, &run);
 563                                 break;
 564                         case BOOT:
 565                                 dinfo(i, ++c, &cur, NULL);
 566                                 break;
 567                         }
 568                 }
 569         putint(s.nchcount, NAMEIROW + 2, NAMEICOL, 9);
 570         putint((nchtotal.ncs_goodhits + nchtotal.ncs_neghits),
 571            NAMEIROW + 2, NAMEICOL + 9, 9);
 572 #define nz(x)   ((x) ? (x) : 1)
 573         putfloat((nchtotal.ncs_goodhits+nchtotal.ncs_neghits) *
 574            100.0 / nz(s.nchcount),
 575            NAMEIROW + 2, NAMEICOL + 19, 4, 0, 1);
 576         putint(nchtotal.ncs_pass2, NAMEIROW + 2, NAMEICOL + 23, 9);
 577         putfloat(nchtotal.ncs_pass2 * 100.0 / nz(s.nchcount),
 578            NAMEIROW + 2, NAMEICOL + 33, 4, 0, 1);
 579 #undef nz
 580 }
 581
 582 int
 583 cmdkre(char *cmd, char *args)
 584 {
 585         int retval;
 586
 587         if (prefix(cmd, "run")) {
 588                 retval = 1;
 589                 copyinfo(&s2, &s1);
 590                 switch (getdevs(&run)) {
 591                 case -1:
 592                         errx(1, "%s", devstat_errbuf);
 593                         break;
 594                 case 1:
 595                         num_devices = run.dinfo->numdevs;
 596                         generation = run.dinfo->generation;
 597                         retval = dscmd("refresh", NULL, MAXDRIVES, &cur);
 598                         if (retval == 2)
 599                                 labelkre();
 600                         break;
 601                 default:
 602                         break;
 603                 }
 604                 state = RUN;
 605                 return (retval);
 606         }
 607         if (prefix(cmd, "boot")) {
 608                 state = BOOT;
 609                 copyinfo(&z, &s1);
 610                 return (1);
 611         }
 612         if (prefix(cmd, "time")) {
 613                 state = TIME;
 614                 return (1);
 615         }
 616         if (prefix(cmd, "zero")) {
 617                 retval = 1;
 618                 if (state == RUN) {
 619                         getinfo(&s1, RUN);
 620                         switch (getdevs(&run)) {
 621                         case -1:
 622                                 errx(1, "%s", devstat_errbuf);
 623                                 break;
 624                         case 1:
 625                                 num_devices = run.dinfo->numdevs;
 626                                 generation = run.dinfo->generation;
 627                                 retval = dscmd("refresh",NULL, MAXDRIVES, &cur);
 628                                 if (retval == 2)
 629                                         labelkre();
 630                                 break;
 631                         default:
 632                                 break;
 633                         }
 634                 }
 635                 return (retval);
 636         }
 637         retval = dscmd(cmd, args, MAXDRIVES, &cur);
 638
 639         if (retval == 2)
 640                 labelkre();
 641
 642         return(retval);
 643 }
 644
 645 /* calculate number of users on the system */
 646 static int
 647 ucount(void)
 648 {
 649         register int nusers = 0;
 650
 651         if (ut < 0)
 652                 return (0);
 653         while (read(ut, &utmp, sizeof(utmp)))
 654                 if (utmp.ut_name[0] != '\0')
 655                         nusers++;
 656
 657         lseek(ut, 0L, L_SET);
 658         return (nusers);
 659 }
 660
 661 static void
 662 putint(int n, int l, int c, int w)
 663 {
 664         char b[128];
 665
 666         move(l, c);
 667         if (n == 0) {
 668                 while (w-- > 0)
 669                         addch(' ');
 670                 return;
 671         }
 672         snprintf(b, sizeof(b), "%*d", w, n);
 673         if (strlen(b) > w) {
 674                 while (w-- > 0)
 675                         addch('*');
 676                 return;
 677         }
 678         addstr(b);
 679 }
 680
 681 static void
 682 putfloat(double f, int l, int c, int w, int d, int nz)
 683 {
 684         char b[128];
 685
 686         move(l, c);
 687         if (nz && f == 0.0) {
 688                 while (--w >= 0)
 689                         addch(' ');
 690                 return;
 691         }
 692         snprintf(b, sizeof(b), "%*.*f", w, d, f);
 693         if (strlen(b) > w)
 694                 snprintf(b, sizeof(b), "%*.0f", w, f);
 695         if (strlen(b) > w) {
 696                 while (--w >= 0)
 697                         addch('*');
 698                 return;
 699         }
 700         addstr(b);
 701 }
 702
 703 static void
 704 putlongdouble(long double f, int l, int c, int w, int d, int nz)
 705 {
 706         char b[128];
 707
 708         move(l, c);
 709         if (nz && f == 0.0) {
 710                 while (--w >= 0)
 711                         addch(' ');
 712                 return;
 713         }
 714         sprintf(b, "%*.*Lf", w, d, f);
 715         if (strlen(b) > w)
 716                 sprintf(b, "%*.0Lf", w, f);
 717         if (strlen(b) > w) {
 718                 while (--w >= 0)
 719                         addch('*');
 720                 return;
 721         }
 722         addstr(b);
 723 }
 724
 725 static void
 726 getinfo(struct Info *s, enum state st)
 727 {
 728         struct devinfo *tmp_dinfo;
 729         struct nchstats *nch_tmp;
 730         size_t size;
 731         int vms_size = sizeof(s->Vms);
 732         int vmm_size = sizeof(s->Vmm);
 733         size_t nch_size = sizeof(s->nchstats) * SMP_MAXCPU;
 734
 735         if (sysctlbyname("vm.vmstats", &s->Vms, &vms_size, NULL, 0)) {
 736                 perror("sysctlbyname: vm.vmstats");
 737                 exit(1);
 738         }
 739         if (sysctlbyname("vm.vmmeter", &s->Vmm, &vmm_size, NULL, 0)) {
 740                 perror("sysctlbyname: vm.vmstats");
 741                 exit(1);
 742         }
 743
 744         if (kinfo_get_sched_cputime(&s->cp_time))
 745                 err(1, "kinfo_get_sched_cputime");
 746         if (kinfo_get_sched_cputime(&cp_time))
 747                 err(1, "kinfo_get_sched_cputime");
 748         NREAD(X_BUFFERSPACE, &s->bufspace, sizeof(s->bufspace));
 749         NREAD(X_DESIREDVNODES, &s->desiredvnodes, sizeof(s->desiredvnodes));
 750         NREAD(X_NUMVNODES, &s->numvnodes, LONG);
 751         NREAD(X_FREEVNODES, &s->freevnodes, LONG);
 752         NREAD(X_NUMDIRTYBUFFERS, &s->numdirtybuffers, sizeof(s->numdirtybuffers));
 753
 754         if (nintr) {
 755                 size = nintr * sizeof(s->intrcnt[0]);
 756                 sysctlbyname("hw.intrcnt", s->intrcnt, &size, NULL, 0);
 757         }
 758         size = sizeof(s->Total);
 759         if (sysctlbyname("vm.vmtotal", &s->Total, &size, NULL, 0) < 0) {
 760                 error("Can't get kernel info: %s\n", strerror(errno));
 761                 bzero(&s->Total, sizeof(s->Total));
 762         }
 763
 764         if ((nch_tmp = malloc(nch_size)) == NULL) {
 765                 perror("malloc");
 766                 exit(1);
 767         } else {
 768                 if (sysctlbyname("vfs.cache.nchstats", nch_tmp, &nch_size, NULL, 0)) {
 769                         perror("sysctlbyname vfs.cache.nchstats");
 770                         free(nch_tmp);
 771                         exit(1);
 772                 } else {
 773                         if ((nch_tmp = realloc(nch_tmp, nch_size)) == NULL) {
 774                                 perror("realloc");
 775                                 exit(1);
 776                         }
 777                 }
 778         }
 779
 780         if (kinfo_get_cpus(&ncpu))
 781                 err(1, "kinfo_get_cpus");
 782         kvm_nch_cpuagg(nch_tmp, &s->nchstats, ncpu);
 783         free(nch_tmp);
 784
 785         tmp_dinfo = last.dinfo;
 786         last.dinfo = cur.dinfo;
 787         cur.dinfo = tmp_dinfo;
 788
 789         last.busy_time = cur.busy_time;
 790         switch (getdevs(&cur)) {
 791         case -1:
 792                 errx(1, "%s", devstat_errbuf);
 793                 break;
 794         case 1:
 795                 num_devices = cur.dinfo->numdevs;
 796                 generation = cur.dinfo->generation;
 797                 cmdkre("refresh", NULL);
 798                 break;
 799         default:
 800                 break;
 801         }
 802 }
 803
 804 static void
 805 allocinfo(struct Info *s)
 806 {
 807         s->intrcnt = (long *) calloc(nintr, sizeof(long));
 808         if (s->intrcnt == NULL)
 809                 errx(2, "out of memory");
 810 }
 811
 812 static void
 813 copyinfo(register struct Info *from, register struct Info *to)
 814 {
 815         long *intrcnt;
 816
 817         /*
 818          * time, wds, seek, and xfer are malloc'd so we have to
 819          * save the pointers before the structure copy and then
 820          * copy by hand.
 821          */
 822         intrcnt = to->intrcnt;
 823         *to = *from;
 824
 825         bcopy(from->intrcnt, to->intrcnt = intrcnt, nintr * sizeof (int));
 826 }
 827
 828 static void
 829 dinfo(int dn, int c, struct statinfo *now, struct statinfo *then)
 830 {
 831         long double transfers_per_second;
 832         long double kb_per_transfer, mb_per_second;
 833         long double elapsed_time, device_busy;
 834         int di;
 835
 836         di = dev_select[dn].position;
 837
 838         elapsed_time = compute_etime(now->busy_time, then ?
 839                                      then->busy_time :
 840                                      now->dinfo->devices[di].dev_creation_time);
 841
 842         device_busy =  compute_etime(now->dinfo->devices[di].busy_time, then ?
 843                                      then->dinfo->devices[di].busy_time :
 844                                      now->dinfo->devices[di].dev_creation_time);
 845
 846         if (compute_stats(&now->dinfo->devices[di], then ?
 847                           &then->dinfo->devices[di] : NULL, elapsed_time,
 848                           NULL, NULL, NULL,
 849                           &kb_per_transfer, &transfers_per_second,
 850                           &mb_per_second, NULL, NULL) != 0)
 851                 errx(1, "%s", devstat_errbuf);
 852
 853         if ((device_busy == 0) && (transfers_per_second > 5))
 854                 /* the device has been 100% busy, fake it because
 855                  * as long as the device is 100% busy the busy_time
 856                  * field in the devstat struct is not updated */
 857                 device_busy = elapsed_time;
 858         if (device_busy > elapsed_time)
 859                 /* this normally happens after one or more periods
 860                  * where the device has been 100% busy, correct it */
 861                 device_busy = elapsed_time;
 862
 863         c = DISKCOL + c * 6;
 864         putlongdouble(kb_per_transfer, DISKROW + 1, c, 5, 2, 0);
 865         putlongdouble(transfers_per_second, DISKROW + 2, c, 5, 0, 0);
 866         putlongdouble(mb_per_second, DISKROW + 3, c, 5, 2, 0);
 867         putlongdouble(device_busy * 100 / elapsed_time, DISKROW + 4, c, 5, 0, 0);
 868 }