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 * $FreeBSD: src/usr.bin/systat/iostat.c,v 1.9.2.1 2000/07/02 10:03:17 ps 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/dkstat.h> 69 70 #include <string.h> 71 #include <stdlib.h> 72 #include <nlist.h> 73 #include <paths.h> 74 #include <devstat.h> 75 #include <err.h> 76 #include "systat.h" 77 #include "extern.h" 78 #include "devs.h" 79 80 static struct nlist namelist[] = { 81 #define X_CP_TIME 0 82 { "_cp_time" }, 83 #ifdef vax 84 #define X_MBDINIT (X_CP_TIME+1) 85 { "_mbdinit" }, 86 #define X_UBDINIT (X_CP_TIME+2) 87 { "_ubdinit" }, 88 #endif 89 #ifdef tahoe 90 #define X_VBDINIT (X_CP_TIME+1) 91 { "_vbdinit" }, 92 #endif 93 { "" }, 94 }; 95 96 struct statinfo cur, last; 97 98 static int linesperregion; 99 static double etime; 100 static int numbers = 0; /* default display bar graphs */ 101 static int kbpt = 0; /* default ms/seek shown */ 102 103 static int barlabels __P((int)); 104 static void histogram __P((long double, int, double)); 105 static int numlabels __P((int)); 106 static int devstats __P((int, int, int)); 107 static void stat1 __P((int, int)); 108 109 WINDOW * 110 openiostat() 111 { 112 return (subwin(stdscr, LINES-1-5, 0, 5, 0)); 113 } 114 115 void 116 closeiostat(w) 117 WINDOW *w; 118 { 119 if (w == NULL) 120 return; 121 wclear(w); 122 wrefresh(w); 123 delwin(w); 124 } 125 126 int 127 initiostat() 128 { 129 if (num_devices = getnumdevs() < 0) 130 return(0); 131 132 cur.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo)); 133 last.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo)); 134 bzero(cur.dinfo, sizeof(struct devinfo)); 135 bzero(last.dinfo, sizeof(struct devinfo)); 136 137 /* 138 * This value for maxshowdevs (100) is bogus. I'm not sure exactly 139 * how to calculate it, though. 140 */ 141 if (dsinit(100, &cur, &last, NULL) != 1) 142 return(0); 143 144 if (kvm_nlist(kd, namelist)) { 145 nlisterr(namelist); 146 return(0); 147 } 148 149 return(1); 150 } 151 152 void 153 fetchiostat() 154 { 155 struct devinfo *tmp_dinfo; 156 157 NREAD(X_CP_TIME, cur.cp_time, sizeof(cur.cp_time)); 158 tmp_dinfo = last.dinfo; 159 last.dinfo = cur.dinfo; 160 cur.dinfo = tmp_dinfo; 161 162 last.busy_time = cur.busy_time; 163 164 /* 165 * Here what we want to do is refresh our device stats. 166 * getdevs() returns 1 when the device list has changed. 167 * If the device list has changed, we want to go through 168 * the selection process again, in case a device that we 169 * were previously displaying has gone away. 170 */ 171 switch (getdevs(&cur)) { 172 case -1: 173 errx(1, "%s", devstat_errbuf); 174 break; 175 case 1: 176 cmdiostat("refresh", NULL); 177 break; 178 default: 179 break; 180 } 181 num_devices = cur.dinfo->numdevs; 182 generation = cur.dinfo->generation; 183 184 } 185 186 #define INSET 10 187 188 void 189 labeliostat() 190 { 191 int row; 192 193 row = 0; 194 wmove(wnd, row, 0); wclrtobot(wnd); 195 mvwaddstr(wnd, row++, INSET, 196 "/0 /10 /20 /30 /40 /50 /60 /70 /80 /90 /100"); 197 mvwaddstr(wnd, row++, 0, "cpu user|"); 198 mvwaddstr(wnd, row++, 0, " nice|"); 199 mvwaddstr(wnd, row++, 0, " system|"); 200 mvwaddstr(wnd, row++, 0, "interrupt|"); 201 mvwaddstr(wnd, row++, 0, " idle|"); 202 if (numbers) 203 row = numlabels(row + 1); 204 else 205 row = barlabels(row + 1); 206 } 207 208 static int 209 numlabels(row) 210 int row; 211 { 212 int i, col, regions, ndrives; 213 char tmpstr[10]; 214 215 #define COLWIDTH 17 216 #define DRIVESPERLINE ((wnd->_maxx - INSET) / COLWIDTH) 217 for (ndrives = 0, i = 0; i < num_devices; i++) 218 if (dev_select[i].selected) 219 ndrives++; 220 regions = howmany(ndrives, DRIVESPERLINE); 221 /* 222 * Deduct -regions for blank line after each scrolling region. 223 */ 224 linesperregion = (wnd->_maxy - row - regions) / regions; 225 /* 226 * Minimum region contains space for two 227 * label lines and one line of statistics. 228 */ 229 if (linesperregion < 3) 230 linesperregion = 3; 231 col = INSET; 232 for (i = 0; i < num_devices; i++) 233 if (dev_select[i].selected) { 234 if (col + COLWIDTH >= wnd->_maxx - INSET) { 235 col = INSET, row += linesperregion + 1; 236 if (row > wnd->_maxy - (linesperregion + 1)) 237 break; 238 } 239 sprintf(tmpstr, "%s%d", dev_select[i].device_name, 240 dev_select[i].unit_number); 241 mvwaddstr(wnd, row, col + 4, tmpstr); 242 mvwaddstr(wnd, row + 1, col, " KB/t tps MB/s "); 243 col += COLWIDTH; 244 } 245 if (col) 246 row += linesperregion + 1; 247 return (row); 248 } 249 250 static int 251 barlabels(row) 252 int row; 253 { 254 int i; 255 char tmpstr[10]; 256 257 mvwaddstr(wnd, row++, INSET, 258 "/0 /10 /20 /30 /40 /50 /60 /70 /80 /90 /100"); 259 linesperregion = 2 + kbpt; 260 for (i = 0; i < num_devices; i++) 261 if (dev_select[i].selected) { 262 if (row > wnd->_maxy - linesperregion) 263 break; 264 sprintf(tmpstr, "%s%d", dev_select[i].device_name, 265 dev_select[i].unit_number); 266 mvwprintw(wnd, row++, 0, "%-5.5s MB/s|", 267 tmpstr); 268 mvwaddstr(wnd, row++, 0, " tps|"); 269 if (kbpt) 270 mvwaddstr(wnd, row++, 0, " KB/t|"); 271 } 272 return (row); 273 } 274 275 276 void 277 showiostat() 278 { 279 register long t; 280 register int i, row, col; 281 282 #define X(fld) t = cur.fld[i]; cur.fld[i] -= last.fld[i]; last.fld[i] = t 283 etime = 0; 284 for(i = 0; i < CPUSTATES; i++) { 285 X(cp_time); 286 etime += cur.cp_time[i]; 287 } 288 if (etime == 0.0) 289 etime = 1.0; 290 etime /= hertz; 291 row = 1; 292 for (i = 0; i < CPUSTATES; i++) 293 stat1(row++, i); 294 if (!numbers) { 295 row += 2; 296 for (i = 0; i < num_devices; i++) 297 if (dev_select[i].selected) { 298 if (row > wnd->_maxy - linesperregion) 299 break; 300 row = devstats(row, INSET, i); 301 } 302 return; 303 } 304 col = INSET; 305 wmove(wnd, row + linesperregion, 0); 306 wdeleteln(wnd); 307 wmove(wnd, row + 3, 0); 308 winsertln(wnd); 309 for (i = 0; i < num_devices; i++) 310 if (dev_select[i].selected) { 311 if (col + COLWIDTH >= wnd->_maxx - INSET) { 312 col = INSET, row += linesperregion + 1; 313 if (row > wnd->_maxy - (linesperregion + 1)) 314 break; 315 wmove(wnd, row + linesperregion, 0); 316 wdeleteln(wnd); 317 wmove(wnd, row + 3, 0); 318 winsertln(wnd); 319 } 320 (void) devstats(row + 3, col, i); 321 col += COLWIDTH; 322 } 323 } 324 325 static int 326 devstats(row, col, dn) 327 int row, col, dn; 328 { 329 long double transfers_per_second; 330 long double kb_per_transfer, mb_per_second; 331 long double busy_seconds; 332 int di; 333 334 di = dev_select[dn].position; 335 336 busy_seconds = compute_etime(cur.busy_time, last.busy_time); 337 338 if (compute_stats(&cur.dinfo->devices[di], &last.dinfo->devices[di], 339 busy_seconds, NULL, NULL, NULL, 340 &kb_per_transfer, &transfers_per_second, 341 &mb_per_second, NULL, NULL) != 0) 342 errx(1, "%s", devstat_errbuf); 343 344 if (numbers) { 345 mvwprintw(wnd, row, col, " %5.2Lf %3.0Lf %5.2Lf ", 346 kb_per_transfer, transfers_per_second, 347 mb_per_second); 348 return(row); 349 } 350 wmove(wnd, row++, col); 351 histogram(mb_per_second, 50, .5); 352 wmove(wnd, row++, col); 353 histogram(transfers_per_second, 50, .5); 354 if (kbpt) { 355 wmove(wnd, row++, col); 356 histogram(kb_per_transfer, 50, .5); 357 } 358 359 return(row); 360 361 } 362 363 static void 364 stat1(row, o) 365 int row, o; 366 { 367 register int i; 368 double time; 369 370 time = 0; 371 for (i = 0; i < CPUSTATES; i++) 372 time += cur.cp_time[i]; 373 if (time == 0.0) 374 time = 1.0; 375 wmove(wnd, row, INSET); 376 #define CPUSCALE 0.5 377 histogram(100.0 * cur.cp_time[o] / time, 50, CPUSCALE); 378 } 379 380 static void 381 histogram(val, colwidth, scale) 382 long double val; 383 int colwidth; 384 double scale; 385 { 386 char buf[10]; 387 register int k; 388 register int v = (int)(val * scale) + 0.5; 389 390 k = MIN(v, colwidth); 391 if (v > colwidth) { 392 snprintf(buf, sizeof(buf), "%5.2Lf", val); 393 k -= strlen(buf); 394 while (k--) 395 waddch(wnd, 'X'); 396 waddstr(wnd, buf); 397 return; 398 } 399 while (k--) 400 waddch(wnd, 'X'); 401 wclrtoeol(wnd); 402 } 403 404 int 405 cmdiostat(cmd, args) 406 char *cmd, *args; 407 { 408 409 if (prefix(cmd, "kbpt")) 410 kbpt = !kbpt; 411 else if (prefix(cmd, "numbers")) 412 numbers = 1; 413 else if (prefix(cmd, "bars")) 414 numbers = 0; 415 else if (!dscmd(cmd, args, 100, &cur)) 416 return (0); 417 wclear(wnd); 418 labeliostat(); 419 refresh(); 420 return (1); 421 } 422