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 = calloc(1, sizeof(struct devinfo)); 116 last.dinfo = calloc(1, sizeof(struct devinfo)); 117 118 /* 119 * This value for maxshowdevs (100) is bogus. I'm not sure exactly 120 * how to calculate it, though. 121 */ 122 if (dsinit(100, &cur, &last, NULL) != 1) 123 return(0); 124 125 return(1); 126 } 127 128 void 129 fetchiostat(void) 130 { 131 struct devinfo *tmp_dinfo; 132 size_t len; 133 134 len = sizeof(cur.cp_time); 135 if (sysctlbyname("kern.cp_time", &cur.cp_time, &len, NULL, 0) 136 || len != sizeof(cur.cp_time)) { 137 perror("kern.cp_time"); 138 exit (1); 139 } 140 tmp_dinfo = last.dinfo; 141 last.dinfo = cur.dinfo; 142 cur.dinfo = tmp_dinfo; 143 144 last.snap_time = cur.snap_time; 145 146 /* 147 * Here what we want to do is refresh our device stats. 148 * getdevs() returns 1 when the device list has changed. 149 * If the device list has changed, we want to go through 150 * the selection process again, in case a device that we 151 * were previously displaying has gone away. 152 */ 153 switch (devstat_getdevs(NULL, &cur)) { 154 case -1: 155 errx(1, "%s", devstat_errbuf); 156 break; 157 case 1: 158 cmdiostat("refresh", NULL); 159 break; 160 default: 161 break; 162 } 163 num_devices = cur.dinfo->numdevs; 164 generation = cur.dinfo->generation; 165 166 } 167 168 #define INSET 10 169 170 void 171 labeliostat(void) 172 { 173 int row; 174 175 row = 0; 176 wmove(wnd, row, 0); wclrtobot(wnd); 177 mvwaddstr(wnd, row++, INSET, 178 "/0% /10 /20 /30 /40 /50 /60 /70 /80 /90 /100"); 179 mvwaddstr(wnd, row++, 0, "cpu user|"); 180 mvwaddstr(wnd, row++, 0, " nice|"); 181 mvwaddstr(wnd, row++, 0, " system|"); 182 mvwaddstr(wnd, row++, 0, "interrupt|"); 183 mvwaddstr(wnd, row++, 0, " idle|"); 184 if (numbers) 185 row = numlabels(row + 1); 186 else 187 row = barlabels(row + 1); 188 } 189 190 static int 191 numlabels(int row) 192 { 193 int i, _col, regions, ndrives; 194 char tmpstr[10]; 195 196 #define COLWIDTH 17 197 #define DRIVESPERLINE ((getmaxx(wnd) - 1 - INSET) / COLWIDTH) 198 for (ndrives = 0, i = 0; i < num_devices; i++) 199 if (dev_select[i].selected) 200 ndrives++; 201 regions = howmany(ndrives, DRIVESPERLINE); 202 /* 203 * Deduct -regions for blank line after each scrolling region. 204 */ 205 linesperregion = (getmaxy(wnd) - 1 - row - regions) / regions; 206 /* 207 * Minimum region contains space for two 208 * label lines and one line of statistics. 209 */ 210 if (linesperregion < 3) 211 linesperregion = 3; 212 _col = INSET; 213 for (i = 0; i < num_devices; i++) 214 if (dev_select[i].selected) { 215 if (_col + COLWIDTH >= getmaxx(wnd) - 1 - INSET) { 216 _col = INSET, row += linesperregion + 1; 217 if (row > getmaxy(wnd) - 1 - (linesperregion + 1)) 218 break; 219 } 220 sprintf(tmpstr, "%s%d", dev_select[i].device_name, 221 dev_select[i].unit_number); 222 mvwaddstr(wnd, row, _col + 4, tmpstr); 223 mvwaddstr(wnd, row + 1, _col, " KB/t tps MB/s "); 224 _col += COLWIDTH; 225 } 226 if (_col) 227 row += linesperregion + 1; 228 return (row); 229 } 230 231 static int 232 barlabels(int row) 233 { 234 int i; 235 char tmpstr[10]; 236 237 mvwaddstr(wnd, row++, INSET, 238 "/0% /10 /20 /30 /40 /50 /60 /70 /80 /90 /100"); 239 linesperregion = 2 + kbpt; 240 for (i = 0; i < num_devices; i++) 241 if (dev_select[i].selected) { 242 if (row > getmaxy(wnd) - 1 - linesperregion) 243 break; 244 sprintf(tmpstr, "%s%d", dev_select[i].device_name, 245 dev_select[i].unit_number); 246 mvwprintw(wnd, row++, 0, "%-5.5s MB/s|", 247 tmpstr); 248 mvwaddstr(wnd, row++, 0, " tps|"); 249 if (kbpt) 250 mvwaddstr(wnd, row++, 0, " KB/t|"); 251 } 252 return (row); 253 } 254 255 void 256 showiostat(void) 257 { 258 long t; 259 int i, row, _col; 260 261 #define X(fld) t = cur.fld[i]; cur.fld[i] -= last.fld[i]; last.fld[i] = t 262 etime = 0; 263 for(i = 0; i < CPUSTATES; i++) { 264 X(cp_time); 265 etime += cur.cp_time[i]; 266 } 267 if (etime == 0.0) 268 etime = 1.0; 269 etime /= hertz; 270 row = 1; 271 for (i = 0; i < CPUSTATES; i++) 272 stat1(row++, i); 273 if (!numbers) { 274 row += 2; 275 for (i = 0; i < num_devices; i++) 276 if (dev_select[i].selected) { 277 if (row > getmaxy(wnd) - linesperregion) 278 break; 279 row = devstats(row, INSET, i); 280 } 281 return; 282 } 283 _col = INSET; 284 wmove(wnd, row + linesperregion, 0); 285 wdeleteln(wnd); 286 wmove(wnd, row + 3, 0); 287 winsertln(wnd); 288 for (i = 0; i < num_devices; i++) 289 if (dev_select[i].selected) { 290 if (_col + COLWIDTH >= getmaxx(wnd) - 1 - INSET) { 291 _col = INSET, row += linesperregion + 1; 292 if (row > getmaxy(wnd) - 1 - (linesperregion + 1)) 293 break; 294 wmove(wnd, row + linesperregion, 0); 295 wdeleteln(wnd); 296 wmove(wnd, row + 3, 0); 297 winsertln(wnd); 298 } 299 (void) devstats(row + 3, _col, i); 300 _col += COLWIDTH; 301 } 302 } 303 304 static int 305 devstats(int row, int _col, int dn) 306 { 307 long double transfers_per_second; 308 long double kb_per_transfer, mb_per_second; 309 long double busy_seconds; 310 int di; 311 312 di = dev_select[dn].position; 313 314 busy_seconds = cur.snap_time - last.snap_time; 315 316 if (devstat_compute_statistics(&cur.dinfo->devices[di], 317 &last.dinfo->devices[di], busy_seconds, 318 DSM_KB_PER_TRANSFER, &kb_per_transfer, 319 DSM_TRANSFERS_PER_SECOND, &transfers_per_second, 320 DSM_MB_PER_SECOND, &mb_per_second, DSM_NONE) != 0) 321 errx(1, "%s", devstat_errbuf); 322 323 if (numbers) { 324 mvwprintw(wnd, row, _col, " %5.2Lf %3.0Lf %5.2Lf ", 325 kb_per_transfer, transfers_per_second, 326 mb_per_second); 327 return(row); 328 } 329 wmove(wnd, row++, _col); 330 histogram(mb_per_second, 50, .5); 331 wmove(wnd, row++, _col); 332 histogram(transfers_per_second, 50, .5); 333 if (kbpt) { 334 wmove(wnd, row++, _col); 335 histogram(kb_per_transfer, 50, .5); 336 } 337 338 return(row); 339 340 } 341 342 static void 343 stat1(int row, int o) 344 { 345 int i; 346 double dtime; 347 348 dtime = 0.0; 349 for (i = 0; i < CPUSTATES; i++) 350 dtime += cur.cp_time[i]; 351 if (dtime == 0.0) 352 dtime = 1.0; 353 wmove(wnd, row, INSET); 354 #define CPUSCALE 0.5 355 histogram(100.0 * cur.cp_time[o] / dtime, 50, CPUSCALE); 356 } 357 358 static void 359 histogram(long double val, int colwidth, double scale) 360 { 361 char buf[10]; 362 int k; 363 int v = (int)(val * scale) + 0.5; 364 365 k = MIN(v, colwidth); 366 if (v > colwidth) { 367 snprintf(buf, sizeof(buf), "%5.2Lf", val); 368 k -= strlen(buf); 369 while (k--) 370 waddch(wnd, 'X'); 371 waddstr(wnd, buf); 372 return; 373 } 374 while (k--) 375 waddch(wnd, 'X'); 376 wclrtoeol(wnd); 377 } 378 379 int 380 cmdiostat(const char *cmd, const char *args) 381 { 382 383 if (prefix(cmd, "kbpt")) 384 kbpt = !kbpt; 385 else if (prefix(cmd, "numbers")) 386 numbers = 1; 387 else if (prefix(cmd, "bars")) 388 numbers = 0; 389 else if (!dscmd(cmd, args, 100, &cur)) 390 return (0); 391 wclear(wnd); 392 labeliostat(); 393 refresh(); 394 return (1); 395 } 396