2.11BSD#431 - /usr/src/usr.bin/iostat.c

   1: #if !defined(lint) && defined(DOSCCS)
   2: static  char *sccsid = "@(#)iostat.c	4.16 (2.11BSD) 1996/1/8";
   3: #endif
   4: 
   5: /*
   6:  * iostat
   7:  */
   8: #include <stdio.h>
   9: #include <ctype.h>
  10: #include <nlist.h>
  11: #include <signal.h>
  12: 
  13: #include <sys/types.h>
  14: #include <sys/file.h>
  15: #include <sys/buf.h>
  16: #include <sys/dk.h>
  17: 
  18: struct nlist nl[] = {
  19:     { "_dk_busy" },
  20: #define X_DK_BUSY   0
  21:     { "_dk_time" },
  22: #define X_DK_TIME   1
  23:     { "_dk_xfer" },
  24: #define X_DK_XFER   2
  25:     { "_dk_wds" },
  26: #define X_DK_WDS    3
  27:     { "_tk_nin" },
  28: #define X_TK_NIN    4
  29:     { "_tk_nout" },
  30: #define X_TK_NOUT   5
  31:     { "_dk_seek" },
  32: #define X_DK_SEEK   6
  33:     { "_cp_time" },
  34: #define X_CP_TIME   7
  35:     { "_dk_wps" },
  36: #define X_DK_WPS    8
  37:     { "_hz" },
  38: #define X_HZ        9
  39:     { "_dk_ndrive" },
  40: #define X_DK_NDRIVE 10
  41:     { "_dk_name" },
  42: #define X_DK_NAME   11
  43:     { "_dk_unit" },
  44: #define X_DK_UNIT   12
  45:     { 0 },
  46: };
  47: 
  48: char    **dr_name;
  49: char    **dk_name;
  50: int *dr_select;
  51: int *dk_unit;
  52: long    *dk_wps;
  53: float   *dk_mspw;
  54: int dk_ndrive;
  55: int ndrives = 0;
  56: char    *defdrives[] = { "rp0", "rp1", "rp2",  0 };
  57: 
  58: struct {
  59:     int dk_busy;
  60:     long    cp_time[CPUSTATES];
  61:     long    *dk_time;
  62:     long    *dk_wds;
  63:     long    *dk_seek;
  64:     long    *dk_xfer;
  65:     long    tk_nin;
  66:     long    tk_nout;
  67: } s, s1;
  68: 
  69: int mf;
  70: int hz;
  71: double  etime;
  72: int tohdr = 1;
  73: int printhdr();
  74: 
  75: main(argc, argv)
  76:     char *argv[];
  77: {
  78:     extern char *ctime();
  79:     register  i;
  80:     int iter;
  81:     double f1, f2;
  82:     long t;
  83:     char *arg, **cp, name[6], buf[BUFSIZ];
  84: 
  85:     nlist("/vmunix", nl);
  86:     if(nl[X_DK_BUSY].n_type == 0) {
  87:         printf("dk_busy not found in /vmunix namelist\n");
  88:         exit(1);
  89:     }
  90:     mf = open("/dev/kmem", 0);
  91:     if(mf < 0) {
  92:         printf("cannot open /dev/kmem\n");
  93:         exit(1);
  94:     }
  95:     iter = 0;
  96:     for (argc--, argv++; argc > 0 && argv[0][0] == '-'; argc--, argv++)
  97:         ;
  98:     if (nl[X_DK_NDRIVE].n_value == 0) {
  99:         printf("dk_ndrive undefined in system\n");
 100:         exit(1);
 101:     }
 102:     lseek(mf, (long)nl[X_DK_NDRIVE].n_value, L_SET);
 103:     read(mf, &dk_ndrive, sizeof (dk_ndrive));
 104:     if (dk_ndrive <= 0) {
 105:         printf("dk_ndrive %d\n", dk_ndrive);
 106:         exit(1);
 107:     }
 108:     dr_select = (int *)calloc(dk_ndrive, sizeof (int));
 109:     dr_name = (char **)calloc(dk_ndrive, sizeof (char *));
 110:     dk_mspw = (float *)calloc(dk_ndrive, sizeof (float));
 111:     dk_name = (char **)calloc(dk_ndrive, sizeof (char *));
 112:     dk_unit = (int *)calloc(dk_ndrive, sizeof (int));
 113:     dk_wps = (long *)calloc(dk_ndrive, sizeof (long));
 114:     s.dk_time = (long *)calloc(dk_ndrive, sizeof (long));
 115:     s1.dk_time = (long *)calloc(dk_ndrive, sizeof (long));
 116:     s.dk_wds = (long *)calloc(dk_ndrive, sizeof (long));
 117:     s1.dk_wds = (long *)calloc(dk_ndrive, sizeof (long));
 118:     s.dk_seek = (long *)calloc(dk_ndrive, sizeof (long));
 119:     s1.dk_seek = (long *)calloc(dk_ndrive, sizeof (long));
 120:     s.dk_xfer = (long *)calloc(dk_ndrive, sizeof (long));
 121:     s1.dk_xfer = (long *)calloc(dk_ndrive, sizeof (long));
 122:     for (arg = buf, i = 0; i < dk_ndrive; i++) {
 123:         dr_name[i] = arg;
 124:         sprintf(dr_name[i], "dk%d", i);
 125:         arg += strlen(dr_name[i]) + 1;
 126:     }
 127:     read_names();
 128:     lseek(mf, (long)nl[X_HZ].n_value, L_SET);
 129:     read(mf, &hz, sizeof hz);
 130:     lseek(mf, (long)nl[X_DK_WPS].n_value, L_SET);
 131:     read(mf, dk_wps, dk_ndrive * sizeof (long));
 132:     for (i = 0; i < dk_ndrive; i++) {
 133:         if (dk_wps[i] == 0)
 134:             continue;
 135:         dk_mspw[i] = 1000.0 / dk_wps[i];
 136:     }
 137: 
 138:     /*
 139: 	 * Choose drives to be displayed.  Priority
 140: 	 * goes to (in order) drives supplied as arguments,
 141: 	 * default drives.  If everything isn't filled
 142: 	 * in and there are drives not taken care of,
 143: 	 * display the first few that fit.
 144: 	 */
 145:     ndrives = 0;
 146:     while (argc > 0 && !isdigit(argv[0][0])) {
 147:         for (i = 0; i < dk_ndrive; i++) {
 148:             if (strcmp(dr_name[i], argv[0]))
 149:                 continue;
 150:             dr_select[i] = 1;
 151:             ndrives++;
 152:         }
 153:         argc--, argv++;
 154:     }
 155:     for (i = 0; i < dk_ndrive && ndrives < 4; i++) {
 156:         if (dr_select[i] || dk_mspw[i] == 0.0)
 157:             continue;
 158:         for (cp = defdrives; *cp; cp++)
 159:             if (strcmp(dr_name[i], *cp) == 0) {
 160:                 dr_select[i] = 1;
 161:                 ndrives++;
 162:                 break;
 163:             }
 164:     }
 165:     for (i = 0; i < dk_ndrive && ndrives < 4; i++) {
 166:         if (dr_select[i])
 167:             continue;
 168:         dr_select[i] = 1;
 169:         ndrives++;
 170:     }
 171:     if (argc > 1)
 172:         iter = atoi(argv[1]);
 173:     signal(SIGCONT, printhdr);
 174: loop:
 175:     if (--tohdr == 0)
 176:         printhdr();
 177:     lseek(mf, (long)nl[X_DK_BUSY].n_value, L_SET);
 178:     read(mf, &s.dk_busy, sizeof s.dk_busy);
 179:     lseek(mf, (long)nl[X_DK_TIME].n_value, L_SET);
 180:     read(mf, s.dk_time, dk_ndrive*sizeof (long));
 181:     lseek(mf, (long)nl[X_DK_XFER].n_value, L_SET);
 182:     read(mf, s.dk_xfer, dk_ndrive*sizeof (long));
 183:     lseek(mf, (long)nl[X_DK_WDS].n_value, L_SET);
 184:     read(mf, s.dk_wds, dk_ndrive*sizeof (long));
 185:     lseek(mf, (long)nl[X_DK_SEEK].n_value, L_SET);
 186:     read(mf, s.dk_seek, dk_ndrive*sizeof (long));
 187:     lseek(mf, (long)nl[X_TK_NIN].n_value, L_SET);
 188:     read(mf, &s.tk_nin, sizeof s.tk_nin);
 189:     lseek(mf, (long)nl[X_TK_NOUT].n_value, L_SET);
 190:     read(mf, &s.tk_nout, sizeof s.tk_nout);
 191:     lseek(mf, (long)nl[X_CP_TIME].n_value, L_SET);
 192:     read(mf, s.cp_time, sizeof s.cp_time);
 193:     for (i = 0; i < dk_ndrive; i++) {
 194:         if (!dr_select[i])
 195:             continue;
 196: #define X(fld)  t = s.fld[i]; s.fld[i] -= s1.fld[i]; s1.fld[i] = t
 197:         X(dk_xfer); X(dk_seek); X(dk_wds); X(dk_time);
 198:     }
 199:     t = s.tk_nin; s.tk_nin -= s1.tk_nin; s1.tk_nin = t;
 200:     t = s.tk_nout; s.tk_nout -= s1.tk_nout; s1.tk_nout = t;
 201:     etime = 0;
 202:     for(i=0; i<CPUSTATES; i++) {
 203:         X(cp_time);
 204:         etime += s.cp_time[i];
 205:     }
 206:     if (etime == 0.0)
 207:         etime = 1.0;
 208:     etime /= (float) hz;
 209:     printf("%4.0f%5.0f", s.tk_nin/etime, s.tk_nout/etime);
 210:     for (i=0; i<dk_ndrive; i++)
 211:         if (dr_select[i])
 212:             stats(i);
 213:     for (i=0; i<CPUSTATES; i++)
 214:         stat1(i);
 215:     printf("\n");
 216:     fflush(stdout);
 217: contin:
 218:     if (--iter && argc > 0) {
 219:         sleep(atoi(argv[0]));
 220:         goto loop;
 221:     }
 222: }
 223: 
 224: printhdr()
 225: {
 226:     register int i;
 227: 
 228:     printf("      tty");
 229:     for (i = 0; i < dk_ndrive; i++)
 230:         if (dr_select[i])
 231:             printf("          %3.3s ", dr_name[i]);
 232:     printf("         cpu\n");
 233:     printf(" tin tout");
 234:     for (i = 0; i < dk_ndrive; i++)
 235:         if (dr_select[i])
 236:             printf(" bps tps msps ");
 237:     printf(" us ni sy id\n");
 238:     tohdr = 19;
 239: }
 240: 
 241: stats(dn)
 242: {
 243:     register i;
 244:     double atime, words, xtime, itime;
 245: 
 246:     if (dk_mspw[dn] == 0.0) {
 247:         printf("%4.0f%4.0f%5.1f ", 0.0, 0.0, 0.0);
 248:         return;
 249:     }
 250:     atime = s.dk_time[dn];
 251:     atime /= (float) hz; /* time controller busy, seconds */
 252:     words = (double)s.dk_wds[dn]*32.0;  /* number of words transferred */
 253:     xtime = (double)dk_mspw[dn]*words/1000.;/* transfer time , seconds */
 254:     itime = atime - xtime;  /* time busy but not transferring , seconds */
 255:     if (xtime < 0)
 256:         itime += xtime, xtime = 0;
 257:     if (itime < 0)
 258:         xtime += itime, itime = 0;
 259:     printf("%4.0f", words/512/etime);
 260:     printf("%4.0f", (double)s.dk_xfer[dn]/etime);
 261:     printf("%5.1f ",
 262:         s.dk_seek[dn] ? itime*1000./(double)s.dk_seek[dn] : 0.0);
 263: }
 264: 
 265: stat1(o)
 266: {
 267:     register i;
 268:     double time;
 269: 
 270:     time = 0;
 271:     for(i=0; i<CPUSTATES; i++)
 272:         time += s.cp_time[i];
 273:     if (time == 0.0)
 274:         time = 1.0;
 275:     printf("%3.0f", 100.*s.cp_time[o]/time);
 276: }
 277: 
 278: read_names()
 279: {
 280:     char two_char[2];
 281:     register int i;
 282: 
 283:     lseek(mf, (long)nl[X_DK_NAME].n_value, L_SET);
 284:     read(mf, dk_name, dk_ndrive * sizeof (char *));
 285:     lseek(mf, (long)nl[X_DK_UNIT].n_value, L_SET);
 286:     read(mf, dk_unit, dk_ndrive * sizeof (int));
 287: 
 288:     for(i = 0; dk_name[i]; i++) {
 289:         lseek(mf, (long)dk_name[i], L_SET);
 290:         read(mf, two_char, sizeof two_char);
 291:         sprintf(dr_name[i], "%c%c%d", two_char[0], two_char[1],
 292:             dk_unit[i]);
 293:     }
 294: }

Defined functions

Defined variables

Defined macros