1 /* 2 * Copyright (c) 1980 Regents of the University of California. 3 * All rights reserved. The Berkeley software License Agreement 4 * specifies the terms and conditions for redistribution. 5 */ 6 7 #ifndef lint 8 static char sccsid[] = "@(#)iostat.c 5.7 (Berkeley) 06/26/91"; 9 #endif not lint 10 11 /* 12 * iostat 13 */ 14 #include "systat.h" 15 #include <sys/buf.h> 16 #include <paths.h> 17 18 WINDOW * 19 openiostat() 20 { 21 return (subwin(stdscr, LINES-1-5, 0, 5, 0)); 22 } 23 24 closeiostat(w) 25 WINDOW *w; 26 { 27 if (w == NULL) 28 return; 29 wclear(w); 30 wrefresh(w); 31 delwin(w); 32 } 33 34 static struct nlist nlst[] = { 35 #define X_DK_BUSY 0 36 { "_dk_busy" }, 37 #define X_DK_TIME 1 38 { "_dk_time" }, 39 #define X_DK_XFER 2 40 { "_dk_xfer" }, 41 #define X_DK_WDS 3 42 { "_dk_wds" }, 43 #define X_DK_SEEK 4 44 { "_dk_seek" }, 45 #define X_CP_TIME 5 46 { "_cp_time" }, 47 #ifdef vax 48 #define X_MBDINIT (X_CP_TIME+1) 49 { "_mbdinit" }, 50 #define X_UBDINIT (X_CP_TIME+2) 51 { "_ubdinit" }, 52 #endif 53 #ifdef tahoe 54 #define X_VBDINIT (X_CP_TIME+1) 55 { "_vbdinit" }, 56 #endif 57 { "" }, 58 }; 59 60 static struct { 61 int dk_busy; 62 long cp_time[CPUSTATES]; 63 long *dk_time; 64 long *dk_wds; 65 long *dk_seek; 66 long *dk_xfer; 67 } s, s1; 68 69 static int linesperregion; 70 static double etime; 71 static int numbers = 0; /* default display bar graphs */ 72 static int msps = 0; /* default ms/seek shown */ 73 74 static int numlabels(), barlabels(), stats(); 75 static void stat1(); 76 77 initiostat() 78 { 79 if (nlst[X_DK_BUSY].n_type == 0) { 80 kvm_nlist(nlst); 81 if (nlst[X_DK_BUSY].n_type == 0) { 82 error("Disk init information isn't in namelist"); 83 return(0); 84 } 85 } 86 if (! dkinit()) 87 return(0); 88 if (dk_ndrive) { 89 #define allocate(e, t) \ 90 s./**/e = (t *)calloc(dk_ndrive, sizeof (t)); \ 91 s1./**/e = (t *)calloc(dk_ndrive, sizeof (t)); 92 allocate(dk_time, long); 93 allocate(dk_wds, long); 94 allocate(dk_seek, long); 95 allocate(dk_xfer, long); 96 #undef allocate 97 } 98 return(1); 99 } 100 101 fetchiostat() 102 { 103 if (nlst[X_DK_BUSY].n_type == 0) 104 return; 105 NREAD(X_DK_BUSY, &s.dk_busy, LONG); 106 NREAD(X_DK_TIME, s.dk_time, dk_ndrive * LONG); 107 NREAD(X_DK_XFER, s.dk_xfer, dk_ndrive * LONG); 108 NREAD(X_DK_WDS, s.dk_wds, dk_ndrive * LONG); 109 NREAD(X_DK_SEEK, s.dk_seek, dk_ndrive * LONG); 110 NREAD(X_CP_TIME, s.cp_time, sizeof s.cp_time); 111 } 112 113 #define INSET 10 114 115 labeliostat() 116 { 117 int row; 118 119 if (nlst[X_DK_BUSY].n_type == 0) { 120 error("No dk_busy defined."); 121 return; 122 } 123 row = 0; 124 wmove(wnd, row, 0); wclrtobot(wnd); 125 mvwaddstr(wnd, row++, INSET, 126 "/0 /10 /20 /30 /40 /50 /60 /70 /80 /90 /100"); 127 mvwaddstr(wnd, row++, 0, "cpu user|"); 128 mvwaddstr(wnd, row++, 0, " nice|"); 129 mvwaddstr(wnd, row++, 0, " system|"); 130 mvwaddstr(wnd, row++, 0, " idle|"); 131 if (numbers) 132 row = numlabels(row + 1); 133 else 134 row = barlabels(row + 1); 135 } 136 137 static int 138 numlabels(row) 139 int row; 140 { 141 int i, col, regions, ndrives; 142 143 #define COLWIDTH 14 144 #define DRIVESPERLINE ((wnd->_maxx - INSET) / COLWIDTH) 145 for (ndrives = 0, i = 0; i < dk_ndrive; i++) 146 if (dk_select[i]) 147 ndrives++; 148 regions = howmany(ndrives, DRIVESPERLINE); 149 /* 150 * Deduct -regions for blank line after each scrolling region. 151 */ 152 linesperregion = (wnd->_maxy - row - regions) / regions; 153 /* 154 * Minimum region contains space for two 155 * label lines and one line of statistics. 156 */ 157 if (linesperregion < 3) 158 linesperregion = 3; 159 col = 0; 160 for (i = 0; i < dk_ndrive; i++) 161 if (dk_select[i] && dk_mspw[i] != 0.0) { 162 if (col + COLWIDTH >= wnd->_maxx - INSET) { 163 col = 0, row += linesperregion + 1; 164 if (row > wnd->_maxy - (linesperregion + 1)) 165 break; 166 } 167 mvwaddstr(wnd, row, col + 4, dr_name[i]); 168 mvwaddstr(wnd, row + 1, col, "bps tps msps"); 169 col += COLWIDTH; 170 } 171 if (col) 172 row += linesperregion + 1; 173 return (row); 174 } 175 176 static int 177 barlabels(row) 178 int row; 179 { 180 int i; 181 182 mvwaddstr(wnd, row++, INSET, 183 "/0 /5 /10 /15 /20 /25 /30 /35 /40 /45 /50"); 184 linesperregion = 2 + msps; 185 for (i = 0; i < dk_ndrive; i++) 186 if (dk_select[i] && dk_mspw[i] != 0.0) { 187 if (row > wnd->_maxy - linesperregion) 188 break; 189 mvwprintw(wnd, row++, 0, "%3.3s bps|", dr_name[i]); 190 mvwaddstr(wnd, row++, 0, " tps|"); 191 if (msps) 192 mvwaddstr(wnd, row++, 0, " msps|"); 193 } 194 return (row); 195 } 196 197 showiostat() 198 { 199 register int i, row, col; 200 register long t; 201 202 if (nlst[X_DK_BUSY].n_type == 0) 203 return; 204 for (i = 0; i < dk_ndrive; i++) { 205 #define X(fld) t = s.fld[i]; s.fld[i] -= s1.fld[i]; s1.fld[i] = t 206 X(dk_xfer); X(dk_seek); X(dk_wds); X(dk_time); 207 } 208 etime = 0; 209 for(i = 0; i < CPUSTATES; i++) { 210 X(cp_time); 211 etime += s.cp_time[i]; 212 } 213 if (etime == 0.0) 214 etime = 1.0; 215 etime /= (float) hz; 216 row = 1; 217 for (i = 0; i < CPUSTATES; i++) 218 stat1(row++, i); 219 if (!numbers) { 220 row += 2; 221 for (i = 0; i < dk_ndrive; i++) 222 if (dk_select[i] && dk_mspw[i] != 0.0) { 223 if (row > wnd->_maxy - linesperregion) 224 break; 225 row = stats(row, INSET, i); 226 } 227 return; 228 } 229 col = 0; 230 wmove(wnd, row + linesperregion, 0); 231 wdeleteln(wnd); 232 wmove(wnd, row + 3, 0); 233 winsertln(wnd); 234 for (i = 0; i < dk_ndrive; i++) 235 if (dk_select[i] && dk_mspw[i] != 0.0) { 236 if (col + COLWIDTH >= wnd->_maxx) { 237 col = 0, row += linesperregion + 1; 238 if (row > wnd->_maxy - (linesperregion + 1)) 239 break; 240 wmove(wnd, row + linesperregion, 0); 241 wdeleteln(wnd); 242 wmove(wnd, row + 3, 0); 243 winsertln(wnd); 244 } 245 (void) stats(row + 3, col, i); 246 col += COLWIDTH; 247 } 248 } 249 250 static int 251 stats(row, col, dn) 252 int row, col, dn; 253 { 254 double atime, words, xtime, itime; 255 256 atime = s.dk_time[dn]; 257 atime /= (float) hz; 258 words = s.dk_wds[dn]*32.0; /* number of words transferred */ 259 xtime = dk_mspw[dn]*words; /* transfer time */ 260 itime = atime - xtime; /* time not transferring */ 261 if (xtime < 0) 262 itime += xtime, xtime = 0; 263 if (itime < 0) 264 xtime += itime, itime = 0; 265 if (numbers) { 266 mvwprintw(wnd, row, col, "%3.0f%4.0f%5.1f", 267 words / 512 / etime, s.dk_xfer[dn] / etime, 268 s.dk_seek[dn] ? itime * 1000. / s.dk_seek[dn] : 0.0); 269 return (row); 270 } 271 wmove(wnd, row++, col); 272 histogram(words / 512 / etime, 50, 1.0); 273 wmove(wnd, row++, col); 274 histogram(s.dk_xfer[dn] / etime, 50, 1.0); 275 if (msps) { 276 wmove(wnd, row++, col); 277 histogram(s.dk_seek[dn] ? itime * 1000. / s.dk_seek[dn] : 0, 278 50, 1.0); 279 } 280 return (row); 281 } 282 283 static void 284 stat1(row, o) 285 int row, o; 286 { 287 register i; 288 double time; 289 290 time = 0; 291 for (i = 0; i < CPUSTATES; i++) 292 time += s.cp_time[i]; 293 if (time == 0.0) 294 time = 1.0; 295 wmove(wnd, row, INSET); 296 #define CPUSCALE 0.5 297 histogram(100.0 * s.cp_time[o] / time, 50, CPUSCALE); 298 } 299 300 histogram(val, colwidth, scale) 301 double val; 302 int colwidth; 303 double scale; 304 { 305 char buf[10]; 306 register int k; 307 register int v = (int)(val * scale) + 0.5; 308 309 k = MIN(v, colwidth); 310 if (v > colwidth) { 311 sprintf(buf, "%4.1f", val); 312 k -= strlen(buf); 313 while (k--) 314 waddch(wnd, 'X'); 315 waddstr(wnd, buf); 316 return; 317 } 318 while (k--) 319 waddch(wnd, 'X'); 320 wclrtoeol(wnd); 321 } 322 323 cmdiostat(cmd, args) 324 char *cmd, *args; 325 { 326 327 if (prefix(cmd, "msps")) 328 msps = !msps; 329 else if (prefix(cmd, "numbers")) 330 numbers = 1; 331 else if (prefix(cmd, "bars")) 332 numbers = 0; 333 else if (!dkcmd(cmd, args)) 334 return (0); 335 wclear(wnd); 336 labeliostat(); 337 refresh(); 338 return (1); 339 } 340