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