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 * $DragonFly: src/usr.bin/systat/iostat.c,v 1.7 2008/11/10 04:59:45 swildner Exp $ 30 * 31 * @(#)iostat.c 8.1 (Berkeley) 6/6/93 32 */ 33 /* 34 * Copyright (c) 1980, 1992, 1993 35 * The Regents of the University of California. All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by the University of 48 * California, Berkeley and its contributors. 49 * 4. Neither the name of the University nor the names of its contributors 50 * may be used to endorse or promote products derived from this software 51 * without specific prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 */ 65 66 #include <sys/param.h> 67 68 #include <err.h> 69 #include <devstat.h> 70 #include <kinfo.h> 71 #include <paths.h> 72 #include <stdlib.h> 73 #include <string.h> 74 #include "systat.h" 75 #include "extern.h" 76 #include "devs.h" 77 78 struct statinfo cur, last; 79 static struct kinfo_cputime cp_time, old_cp_time; 80 81 static int linesperregion; 82 static int numbers = 0; /* default display bar graphs */ 83 static int kbpt = 0; /* default ms/seek shown */ 84 85 static int barlabels(int); 86 static void histogram(long double, int, double); 87 static int numlabels(int); 88 static int devstats(int, int, int); 89 static void stat1(int, uint64_t, uint64_t); 90 91 WINDOW * 92 openiostat(void) 93 { 94 return (subwin(stdscr, LINES-1-5, 0, 5, 0)); 95 } 96 97 void 98 closeiostat(WINDOW *w) 99 { 100 if (w == NULL) 101 return; 102 wclear(w); 103 wrefresh(w); 104 delwin(w); 105 } 106 107 int 108 initiostat(void) 109 { 110 if ((num_devices = getnumdevs()) < 0) 111 return(0); 112 113 cur.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo)); 114 last.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo)); 115 bzero(cur.dinfo, sizeof(struct devinfo)); 116 bzero(last.dinfo, 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; 132 133 if (kinfo_get_sched_cputime(&cp_time)) 134 err(1, "kinfo_get_sched_cputime"); 135 tmp_dinfo = last.dinfo; 136 last.dinfo = cur.dinfo; 137 cur.dinfo = tmp_dinfo; 138 139 last.busy_time = cur.busy_time; 140 141 /* 142 * Here what we want to do is refresh our device stats. 143 * getdevs() returns 1 when the device list has changed. 144 * If the device list has changed, we want to go through 145 * the selection process again, in case a device that we 146 * were previously displaying has gone away. 147 */ 148 switch (getdevs(&cur)) { 149 case -1: 150 errx(1, "%s", devstat_errbuf); 151 break; 152 case 1: 153 cmdiostat("refresh", NULL); 154 break; 155 default: 156 break; 157 } 158 num_devices = cur.dinfo->numdevs; 159 generation = cur.dinfo->generation; 160 161 } 162 163 #define INSET 10 164 165 void 166 labeliostat(void) 167 { 168 int row; 169 170 row = 0; 171 wmove(wnd, row, 0); wclrtobot(wnd); 172 mvwaddstr(wnd, row++, INSET, 173 "/0 /10 /20 /30 /40 /50 /60 /70 /80 /90 /100"); 174 mvwaddstr(wnd, row++, 0, "cpu user|"); 175 mvwaddstr(wnd, row++, 0, " nice|"); 176 mvwaddstr(wnd, row++, 0, " system|"); 177 mvwaddstr(wnd, row++, 0, "interrupt|"); 178 mvwaddstr(wnd, row++, 0, " idle|"); 179 if (numbers) 180 row = numlabels(row + 1); 181 else 182 row = barlabels(row + 1); 183 } 184 185 static int 186 numlabels(int row) 187 { 188 int i, _col, regions, ndrives; 189 char tmpstr[10]; 190 191 #define COLWIDTH 17 192 #define DRIVESPERLINE ((wnd->_maxx - INSET) / COLWIDTH) 193 for (ndrives = 0, i = 0; i < num_devices; i++) 194 if (dev_select[i].selected) 195 ndrives++; 196 regions = howmany(ndrives, DRIVESPERLINE); 197 /* 198 * Deduct -regions for blank line after each scrolling region. 199 */ 200 linesperregion = (wnd->_maxy - row - regions) / regions; 201 /* 202 * Minimum region contains space for two 203 * label lines and one line of statistics. 204 */ 205 if (linesperregion < 3) 206 linesperregion = 3; 207 _col = INSET; 208 for (i = 0; i < num_devices; i++) 209 if (dev_select[i].selected) { 210 if (_col + COLWIDTH >= wnd->_maxx - INSET) { 211 _col = INSET, row += linesperregion + 1; 212 if (row > wnd->_maxy - (linesperregion + 1)) 213 break; 214 } 215 sprintf(tmpstr, "%s%d", dev_select[i].device_name, 216 dev_select[i].unit_number); 217 mvwaddstr(wnd, row, _col + 4, tmpstr); 218 mvwaddstr(wnd, row + 1, _col, " KB/t tps MB/s "); 219 _col += COLWIDTH; 220 } 221 if (_col) 222 row += linesperregion + 1; 223 return (row); 224 } 225 226 static int 227 barlabels(int row) 228 { 229 int i; 230 char tmpstr[10]; 231 232 mvwaddstr(wnd, row++, INSET, 233 "/0 /10 /20 /30 /40 /50 /60 /70 /80 /90 /100"); 234 linesperregion = 2 + kbpt; 235 for (i = 0; i < num_devices; i++) 236 if (dev_select[i].selected) { 237 if (row > wnd->_maxy - linesperregion) 238 break; 239 sprintf(tmpstr, "%s%d", dev_select[i].device_name, 240 dev_select[i].unit_number); 241 mvwprintw(wnd, row++, 0, "%-5.5s MB/s|", 242 tmpstr); 243 mvwaddstr(wnd, row++, 0, " tps|"); 244 if (kbpt) 245 mvwaddstr(wnd, row++, 0, " KB/t|"); 246 } 247 return (row); 248 } 249 250 251 void 252 showiostat(void) 253 { 254 int i, row, _col; 255 struct kinfo_cputime diff_cp_time; 256 uint64_t cp_total; 257 258 diff_cp_time.cp_user = cp_time.cp_user - old_cp_time.cp_user; 259 diff_cp_time.cp_nice = cp_time.cp_nice - old_cp_time.cp_nice; 260 diff_cp_time.cp_sys = cp_time.cp_sys - old_cp_time.cp_sys; 261 diff_cp_time.cp_intr = cp_time.cp_intr - old_cp_time.cp_intr; 262 diff_cp_time.cp_idle = cp_time.cp_idle - old_cp_time.cp_idle; 263 old_cp_time = cp_time; 264 265 row = 1; 266 cp_total = diff_cp_time.cp_user + diff_cp_time.cp_nice + 267 diff_cp_time.cp_sys + diff_cp_time.cp_intr + diff_cp_time.cp_idle; 268 stat1(row++, diff_cp_time.cp_user, cp_total); 269 stat1(row++, diff_cp_time.cp_nice, cp_total); 270 stat1(row++, diff_cp_time.cp_sys, cp_total); 271 stat1(row++, diff_cp_time.cp_intr, cp_total); 272 stat1(row++, diff_cp_time.cp_idle, cp_total); 273 if (!numbers) { 274 row += 2; 275 for (i = 0; i < num_devices; i++) 276 if (dev_select[i].selected) { 277 if (row > wnd->_maxy - 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 >= wnd->_maxx - INSET) { 291 _col = INSET, row += linesperregion + 1; 292 if (row > wnd->_maxy - (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 = compute_etime(cur.busy_time, last.busy_time); 315 316 if (compute_stats(&cur.dinfo->devices[di], &last.dinfo->devices[di], 317 busy_seconds, NULL, NULL, NULL, 318 &kb_per_transfer, &transfers_per_second, 319 &mb_per_second, NULL, NULL) != 0) 320 errx(1, "%s", devstat_errbuf); 321 322 if (numbers) { 323 mvwprintw(wnd, row, _col, " %5.2Lf %3.0Lf %5.2Lf ", 324 kb_per_transfer, transfers_per_second, 325 mb_per_second); 326 return(row); 327 } 328 wmove(wnd, row++, _col); 329 histogram(mb_per_second, 50, .5); 330 wmove(wnd, row++, _col); 331 histogram(transfers_per_second, 50, .5); 332 if (kbpt) { 333 wmove(wnd, row++, _col); 334 histogram(kb_per_transfer, 50, .5); 335 } 336 337 return(row); 338 339 } 340 341 static void 342 stat1(int row, uint64_t difference, uint64_t total) 343 { 344 double dtime; 345 346 if (total > 0) 347 dtime = 100.0 * difference / total; 348 else 349 dtime = 0; 350 wmove(wnd, row, INSET); 351 #define CPUSCALE 0.5 352 histogram(dtime, 50, CPUSCALE); 353 } 354 355 static void 356 histogram(long double val, int colwidth, double scale) 357 { 358 char buf[10]; 359 int k; 360 int v = (int)(val * scale) + 0.5; 361 362 if (val <= 0) 363 v = 0; 364 k = MIN(v, colwidth); 365 if (v > colwidth) { 366 snprintf(buf, sizeof(buf), "%5.2Lf", val); 367 k -= strlen(buf); 368 while (k--) 369 waddch(wnd, 'X'); 370 waddstr(wnd, buf); 371 return; 372 } 373 while (k--) 374 waddch(wnd, 'X'); 375 wclrtoeol(wnd); 376 } 377 378 int 379 cmdiostat(const char *cmd, char *args) 380 { 381 382 if (prefix(cmd, "kbpt")) 383 kbpt = !kbpt; 384 else if (prefix(cmd, "numbers")) 385 numbers = 1; 386 else if (prefix(cmd, "bars")) 387 numbers = 0; 388 else if (!dscmd(cmd, args, 100, &cur)) 389 return (0); 390 wclear(wnd); 391 labeliostat(); 392 refresh(); 393 return (1); 394 } 395