usr.bin/systat/pigs.c

   1 /*-
   2  * Copyright (c) 1980, 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
  34 #if 0
  35 #ifndef lint
  36 static char sccsid[] = "@(#)pigs.c      8.2 (Berkeley) 9/23/93";
  37 #endif /* not lint */
  38 #endif
  39
  40 #include <sys/cdefs.h>
  41 __FBSDID("$FreeBSD$");
  42
  43 /*
  44  * Pigs display from Bill Reeves at Lucasfilm
  45  */
  46
  47 #include <sys/param.h>
  48 #include <sys/proc.h>
  49 #include <sys/sysctl.h>
  50 #include <sys/time.h>
  51 #include <sys/user.h>
  52
  53 #include <curses.h>
  54 #include <math.h>
  55 #include <pwd.h>
  56 #include <stdlib.h>
  57
  58 #include "systat.h"
  59 #include "extern.h"
  60
  61 int compar(const void *, const void *);
  62
  63 static int nproc;
  64 static struct p_times {
  65         float pt_pctcpu;
  66         struct kinfo_proc *pt_kp;
  67 } *pt;
  68
  69 static int    fscale;
  70 static double  lccpu;
  71
  72 WINDOW *
  73 openpigs(void)
  74 {
  75         return (subwin(stdscr, LINES-3-1, 0, MAINWIN_ROW, 0));
  76 }
  77
  78 void
  79 closepigs(WINDOW *w)
  80 {
  81         if (w == NULL)
  82                 return;
  83         wclear(w);
  84         wrefresh(w);
  85         delwin(w);
  86 }
  87
  88
  89 void
  90 showpigs(void)
  91 {
  92         int i, j, y, k;
  93         const char *uname, *pname;
  94         char pidname[30];
  95
  96         if (pt == NULL)
  97                 return;
  98
  99         qsort(pt, nproc, sizeof (struct p_times), compar);
 100         y = 1;
 101         i = nproc;
 102         if (i > wnd->_maxy-1)
 103                 i = wnd->_maxy-1;
 104         for (k = 0; i > 0 && pt[k].pt_pctcpu > 0.01; i--, y++, k++) {
 105                 uname = user_from_uid(pt[k].pt_kp->ki_uid, 0);
 106                 pname = pt[k].pt_kp->ki_comm;
 107                 wmove(wnd, y, 0);
 108                 wclrtoeol(wnd);
 109                 mvwaddstr(wnd, y, 0, uname);
 110                 snprintf(pidname, sizeof(pidname), "%10.10s", pname);
 111                 mvwaddstr(wnd, y, 9, pidname);
 112                 wmove(wnd, y, 20);
 113                 for (j = pt[k].pt_pctcpu * 50 + 0.5; j > 0; j--)
 114                         waddch(wnd, 'X');
 115         }
 116         wmove(wnd, y, 0); wclrtobot(wnd);
 117 }
 118
 119 int
 120 initpigs(void)
 121 {
 122         fixpt_t ccpu;
 123         size_t len;
 124         int err;
 125
 126         len = sizeof(ccpu);
 127         err = sysctlbyname("kern.ccpu", &ccpu, &len, NULL, 0);
 128         if (err || len != sizeof(ccpu)) {
 129                 perror("kern.ccpu");
 130                 return (0);
 131         }
 132
 133         len = sizeof(fscale);
 134         err = sysctlbyname("kern.fscale", &fscale, &len, NULL, 0);
 135         if (err || len != sizeof(fscale)) {
 136                 perror("kern.fscale");
 137                 return (0);
 138         }
 139
 140         lccpu = log((double) ccpu / fscale);
 141
 142         return(1);
 143 }
 144
 145 void
 146 fetchpigs(void)
 147 {
 148         int i;
 149         float ftime;
 150         float *pctp;
 151         struct kinfo_proc *kpp;
 152         static int lastnproc = 0;
 153
 154         if ((kpp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nproc)) == NULL) {
 155                 error("%s", kvm_geterr(kd));
 156                 if (pt)
 157                         free(pt);
 158                 return;
 159         }
 160         if (nproc > lastnproc) {
 161                 free(pt);
 162                 if ((pt =
 163                     malloc(nproc * sizeof(struct p_times))) == NULL) {
 164                         error("Out of memory");
 165                         die(0);
 166                 }
 167         }
 168         lastnproc = nproc;
 169         /*
 170          * calculate %cpu for each proc
 171          */
 172         for (i = 0; i < nproc; i++) {
 173                 pt[i].pt_kp = &kpp[i];
 174                 pctp = &pt[i].pt_pctcpu;
 175                 ftime = kpp[i].ki_swtime;
 176                 if (ftime == 0 || (kpp[i].ki_flag & P_INMEM) == 0)
 177                         *pctp = 0;
 178                 else
 179                         *pctp = ((double) kpp[i].ki_pctcpu /
 180                                         fscale) / (1.0 - exp(ftime * lccpu));
 181         }
 182 }
 183
 184 void
 185 labelpigs(void)
 186 {
 187         wmove(wnd, 0, 0);
 188         wclrtoeol(wnd);
 189         mvwaddstr(wnd, 0, 20,
 190             "/0%  /10  /20  /30  /40  /50  /60  /70  /80  /90  /100");
 191 }
 192
 193 int
 194 compar(const void *a, const void *b)
 195 {
 196         return (((const struct p_times *) a)->pt_pctcpu >
 197                 ((const struct p_times *) b)->pt_pctcpu)? -1: 1;
 198 }