1 /* 2 * Copyright (c) 1998 Kenneth D. Merry. 3 * 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. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $Id: iostat.c,v 1.6 1998/09/15 08:16:40 gibbs Exp $ 29 */ 30 /* 31 * Copyright (c) 1980, 1992, 1993 32 * The Regents of the University of California. All rights reserved. 33 * 34 * Redistribution and use in source and binary forms, with or without 35 * modification, are permitted provided that the following conditions 36 * are met: 37 * 1. Redistributions of source code must retain the above copyright 38 * notice, this list of conditions and the following disclaimer. 39 * 2. Redistributions in binary form must reproduce the above copyright 40 * notice, this list of conditions and the following disclaimer in the 41 * documentation and/or other materials provided with the distribution. 42 * 3. All advertising materials mentioning features or use of this software 43 * must display the following acknowledgement: 44 * This product includes software developed by the University of 45 * California, Berkeley and its contributors. 46 * 4. Neither the name of the University nor the names of its contributors 47 * may be used to endorse or promote products derived from this software 48 * without specific prior written permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 53 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 60 * SUCH DAMAGE. 61 */ 62 63 #ifndef lint 64 static char sccsid[] = "@(#)iostat.c 8.1 (Berkeley) 6/6/93"; 65 #endif not lint 66 67 #include <sys/param.h> 68 #include <sys/buf.h> 69 #include <sys/dkstat.h> 70 71 #include <string.h> 72 #include <stdlib.h> 73 #include <nlist.h> 74 #include <paths.h> 75 #include <devstat.h> 76 #include <err.h> 77 #include "systat.h" 78 #include "extern.h" 79 #include "devs.h" 80 81 static struct nlist namelist[] = { 82 #define X_CP_TIME 0 83 { "_cp_time" }, 84 #ifdef vax 85 #define X_MBDINIT (X_CP_TIME+1) 86 { "_mbdinit" }, 87 #define X_UBDINIT (X_CP_TIME+2) 88 { "_ubdinit" }, 89 #endif 90 #ifdef tahoe 91 #define X_VBDINIT (X_CP_TIME+1) 92 { "_vbdinit" }, 93 #endif 94 { "" }, 95 }; 96 97 struct statinfo cur, last; 98 99 static int linesperregion; 100 static double etime; 101 static int numbers = 0; /* default display bar graphs */ 102 static int kbpt = 0; /* default ms/seek shown */ 103 104 static int barlabels __P((int)); 105 static void histogram __P((long double, int, double)); 106 static int numlabels __P((int)); 107 static int devstats __P((int, int, int)); 108 static void stat1 __P((int, int)); 109 110 WINDOW * 111 openiostat() 112 { 113 return (subwin(stdscr, LINES-1-5, 0, 5, 0)); 114 } 115 116 void 117 closeiostat(w) 118 WINDOW *w; 119 { 120 if (w == NULL) 121 return; 122 wclear(w); 123 wrefresh(w); 124 delwin(w); 125 } 126 127 int 128 initiostat() 129 { 130 if (num_devices = getnumdevs() < 0) 131 return(0); 132 133 cur.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo)); 134 last.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo)); 135 bzero(cur.dinfo, sizeof(struct devinfo)); 136 bzero(last.dinfo, sizeof(struct devinfo)); 137 138 /* 139 * This value for maxshowdevs (100) is bogus. I'm not sure exactly 140 * how to calculate it, though. 141 */ 142 if (dsinit(100, &cur, &last, NULL) != 1) 143 return(0); 144 145 if (kvm_nlist(kd, namelist)) { 146 nlisterr(namelist); 147 return(0); 148 } 149 150 return(1); 151 } 152 153 void 154 fetchiostat() 155 { 156 struct devinfo *tmp_dinfo; 157 158 NREAD(X_CP_TIME, cur.cp_time, sizeof(cur.cp_time)); 159 tmp_dinfo = last.dinfo; 160 last.dinfo = cur.dinfo; 161 cur.dinfo = tmp_dinfo; 162 163 last.busy_time = cur.busy_time; 164 165 /* 166 * Here what we want to do is refresh our device stats. 167 * getdevs() returns 1 when the device list has changed. 168 * If the device list has changed, we want to go through 169 * the selection process again, in case a device that we 170 * were previously displaying has gone away. 171 */ 172 switch (getdevs(&cur)) { 173 case -1: 174 errx(1, "%s", devstat_errbuf); 175 break; 176 case 1: 177 cmdiostat("refresh", NULL); 178 break; 179 default: 180 break; 181 } 182 num_devices = cur.dinfo->numdevs; 183 generation = cur.dinfo->generation; 184 185 } 186 187 #define INSET 10 188 189 void 190 labeliostat() 191 { 192 int row; 193 194 row = 0; 195 wmove(wnd, row, 0); wclrtobot(wnd); 196 mvwaddstr(wnd, row++, INSET, 197 "/0 /10 /20 /30 /40 /50 /60 /70 /80 /90 /100"); 198 mvwaddstr(wnd, row++, 0, "cpu user|"); 199 mvwaddstr(wnd, row++, 0, " nice|"); 200 mvwaddstr(wnd, row++, 0, " system|"); 201 mvwaddstr(wnd, row++, 0, "interrupt|"); 202 mvwaddstr(wnd, row++, 0, " idle|"); 203 if (numbers) 204 row = numlabels(row + 1); 205 else 206 row = barlabels(row + 1); 207 } 208 209 static int 210 numlabels(row) 211 int row; 212 { 213 int i, col, regions, ndrives; 214 char tmpstr[10]; 215 216 #define COLWIDTH 17 217 #define DRIVESPERLINE ((wnd->maxx - INSET) / COLWIDTH) 218 for (ndrives = 0, i = 0; i < num_devices; i++) 219 if (dev_select[i].selected) 220 ndrives++; 221 regions = howmany(ndrives, DRIVESPERLINE); 222 /* 223 * Deduct -regions for blank line after each scrolling region. 224 */ 225 linesperregion = (wnd->maxy - row - regions) / regions; 226 /* 227 * Minimum region contains space for two 228 * label lines and one line of statistics. 229 */ 230 if (linesperregion < 3) 231 linesperregion = 3; 232 col = INSET; 233 for (i = 0; i < num_devices; i++) 234 if (dev_select[i].selected) { 235 if (col + COLWIDTH >= wnd->maxx - INSET) { 236 col = INSET, row += linesperregion + 1; 237 if (row > wnd->maxy - (linesperregion + 1)) 238 break; 239 } 240 sprintf(tmpstr, "%s%d", dev_select[i].device_name, 241 dev_select[i].unit_number); 242 mvwaddstr(wnd, row, col + 4, tmpstr); 243 mvwaddstr(wnd, row + 1, col, " KB/t tps MB/s "); 244 col += COLWIDTH; 245 } 246 if (col) 247 row += linesperregion + 1; 248 return (row); 249 } 250 251 static int 252 barlabels(row) 253 int row; 254 { 255 int i; 256 char tmpstr[10]; 257 258 mvwaddstr(wnd, row++, INSET, 259 "/0 /5 /10 /15 /20 /25 /30 /35 /40 /45 /50"); 260 linesperregion = 2 + kbpt; 261 for (i = 0; i < num_devices; i++) 262 if (dev_select[i].selected) { 263 if (row > wnd->maxy - linesperregion) 264 break; 265 sprintf(tmpstr, "%s%d", dev_select[i].device_name, 266 dev_select[i].unit_number); 267 mvwprintw(wnd, row++, 0, "%-5.5s MB/s|", 268 tmpstr); 269 mvwaddstr(wnd, row++, 0, " tps|"); 270 if (kbpt) 271 mvwaddstr(wnd, row++, 0, " KB/t|"); 272 } 273 return (row); 274 } 275 276 277 void 278 showiostat() 279 { 280 register long t; 281 register int i, row, col; 282 283 #define X(fld) t = cur.fld[i]; cur.fld[i] -= last.fld[i]; last.fld[i] = t 284 etime = 0; 285 for(i = 0; i < CPUSTATES; i++) { 286 X(cp_time); 287 etime += cur.cp_time[i]; 288 } 289 if (etime == 0.0) 290 etime = 1.0; 291 etime /= hertz; 292 row = 1; 293 for (i = 0; i < CPUSTATES; i++) 294 stat1(row++, i); 295 if (!numbers) { 296 row += 2; 297 for (i = 0; i < num_devices; i++) 298 if (dev_select[i].selected) { 299 if (row > wnd->maxy - linesperregion) 300 break; 301 row = devstats(row, INSET, i); 302 } 303 return; 304 } 305 col = INSET; 306 wmove(wnd, row + linesperregion, 0); 307 wdeleteln(wnd); 308 wmove(wnd, row + 3, 0); 309 winsertln(wnd); 310 for (i = 0; i < num_devices; i++) 311 if (dev_select[i].selected) { 312 if (col + COLWIDTH >= wnd->maxx - INSET) { 313 col = INSET, row += linesperregion + 1; 314 if (row > wnd->maxy - (linesperregion + 1)) 315 break; 316 wmove(wnd, row + linesperregion, 0); 317 wdeleteln(wnd); 318 wmove(wnd, row + 3, 0); 319 winsertln(wnd); 320 } 321 (void) devstats(row + 3, col, i); 322 col += COLWIDTH; 323 } 324 } 325 326 static int 327 devstats(row, col, dn) 328 int row, col, dn; 329 { 330 long double transfers_per_second; 331 long double kb_per_transfer, mb_per_second; 332 long double busy_seconds; 333 int di; 334 335 di = dev_select[dn].position; 336 337 busy_seconds = compute_etime(cur.busy_time, last.busy_time); 338 339 if (compute_stats(&cur.dinfo->devices[di], &last.dinfo->devices[di], 340 busy_seconds, NULL, NULL, NULL, 341 &kb_per_transfer, &transfers_per_second, 342 &mb_per_second, NULL, NULL) != 0) 343 errx(1, "%s", devstat_errbuf); 344 345 if (numbers) { 346 mvwprintw(wnd, row, col, " %5.2Lf %3.0Lf %5.2Lf ", 347 kb_per_transfer, transfers_per_second, 348 mb_per_second); 349 return(row); 350 } 351 wmove(wnd, row++, col); 352 histogram(mb_per_second, 50, 1.0); 353 wmove(wnd, row++, col); 354 histogram(transfers_per_second, 50, 1.0); 355 if (kbpt) { 356 wmove(wnd, row++, col); 357 histogram(kb_per_transfer, 50, 1.0); 358 } 359 360 return(row); 361 362 } 363 364 static void 365 stat1(row, o) 366 int row, o; 367 { 368 register int i; 369 double time; 370 371 time = 0; 372 for (i = 0; i < CPUSTATES; i++) 373 time += cur.cp_time[i]; 374 if (time == 0.0) 375 time = 1.0; 376 wmove(wnd, row, INSET); 377 #define CPUSCALE 0.5 378 histogram(100.0 * cur.cp_time[o] / time, 50, CPUSCALE); 379 } 380 381 static void 382 histogram(val, colwidth, scale) 383 long double val; 384 int colwidth; 385 double scale; 386 { 387 char buf[10]; 388 register int k; 389 register int v = (int)(val * scale) + 0.5; 390 391 k = MIN(v, colwidth); 392 if (v > colwidth) { 393 snprintf(buf, sizeof(buf), "%5.2Lf", val); 394 k -= strlen(buf); 395 while (k--) 396 waddch(wnd, 'X'); 397 waddstr(wnd, buf); 398 return; 399 } 400 while (k--) 401 waddch(wnd, 'X'); 402 wclrtoeol(wnd); 403 } 404 405 int 406 cmdiostat(cmd, args) 407 char *cmd, *args; 408 { 409 410 if (prefix(cmd, "kbpt")) 411 kbpt = !kbpt; 412 else if (prefix(cmd, "numbers")) 413 numbers = 1; 414 else if (prefix(cmd, "bars")) 415 numbers = 0; 416 else if (!dscmd(cmd, args, 100, &cur)) 417 return (0); 418 wclear(wnd); 419 labeliostat(); 420 refresh(); 421 return (1); 422 } 423