iostat.c revision 1.14
1 /* $NetBSD: iostat.c,v 1.14 2000/06/03 21:00:42 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1980, 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)iostat.c 8.1 (Berkeley) 6/6/93"; 40 #endif 41 __RCSID("$NetBSD: iostat.c,v 1.14 2000/06/03 21:00:42 thorpej Exp $"); 42 #endif not lint 43 44 #include <sys/param.h> 45 #include <sys/sched.h> 46 #include <sys/dkstat.h> 47 #include <sys/buf.h> 48 #include <sys/time.h> 49 50 #include <string.h> 51 #include <stdlib.h> 52 #include <nlist.h> 53 #include <paths.h> 54 #include "systat.h" 55 #include "extern.h" 56 57 #include "dkstats.h" 58 extern struct _disk cur; 59 60 static int linesperregion; 61 static double etime; 62 static int numbers = 0; /* default display bar graphs */ 63 static int secs = 0; /* default seconds shown */ 64 65 static int barlabels __P((int)); 66 static void histogram __P((double, int, double)); 67 static int numlabels __P((int)); 68 static int stats __P((int, int, int)); 69 static void stat1 __P((int, int)); 70 71 72 WINDOW * 73 openiostat() 74 { 75 76 return (subwin(stdscr, LINES-1-5, 0, 5, 0)); 77 } 78 79 void 80 closeiostat(w) 81 WINDOW *w; 82 { 83 84 if (w == NULL) 85 return; 86 wclear(w); 87 wrefresh(w); 88 delwin(w); 89 } 90 91 int 92 initiostat() 93 { 94 extern gid_t egid; 95 96 dkinit(1, egid); 97 dkreadstats(); 98 return(1); 99 } 100 101 void 102 fetchiostat() 103 { 104 105 if (dk_ndrive == 0) 106 return; 107 dkreadstats(); 108 } 109 110 #define INSET 14 111 112 void 113 labeliostat() 114 { 115 int row; 116 117 if (dk_ndrive == 0) { 118 error("No drives defined."); 119 return; 120 } 121 row = 0; 122 wmove(wnd, row, 0); wclrtobot(wnd); 123 mvwaddstr(wnd, row++, INSET, 124 "/0 /10 /20 /30 /40 /50 /60 /70 /80 /90 /100"); 125 mvwaddstr(wnd, row++, 0, " cpu user|"); 126 mvwaddstr(wnd, row++, 0, " nice|"); 127 mvwaddstr(wnd, row++, 0, " system|"); 128 mvwaddstr(wnd, row++, 0, " interrupt|"); 129 mvwaddstr(wnd, row++, 0, " idle|"); 130 if (numbers) 131 row = numlabels(row + 1); 132 else 133 row = barlabels(row + 1); 134 } 135 136 static int 137 numlabels(row) 138 int row; 139 { 140 int i, col, regions, ndrives; 141 142 #define COLWIDTH 14 143 #define DRIVESPERLINE ((getmaxx(wnd) - INSET) / COLWIDTH) 144 for (ndrives = 0, i = 0; i < dk_ndrive; i++) 145 if (cur.dk_select[i]) 146 ndrives++; 147 regions = howmany(ndrives, DRIVESPERLINE); 148 /* 149 * Deduct -regions for blank line after each scrolling region. 150 */ 151 linesperregion = (getmaxy(wnd) - row - regions) / regions; 152 /* 153 * Minimum region contains space for two 154 * label lines and one line of statistics. 155 */ 156 if (linesperregion < 3) 157 linesperregion = 3; 158 col = 0; 159 for (i = 0; i < dk_ndrive; i++) 160 if (cur.dk_select[i] /*&& cur.dk_bytes[i] != 0.0*/) { 161 if (col + COLWIDTH >= getmaxx(wnd) - INSET) { 162 col = 0, row += linesperregion + 1; 163 if (row > getmaxy(wnd) - (linesperregion + 1)) 164 break; 165 } 166 mvwaddstr(wnd, row, col + 4, cur.dk_name[i]); 167 mvwaddstr(wnd, row + 1, col, "KBps tps sec"); 168 col += COLWIDTH; 169 } 170 if (col) 171 row += linesperregion + 1; 172 return (row); 173 } 174 175 static int 176 barlabels(row) 177 int row; 178 { 179 int i; 180 181 mvwaddstr(wnd, row++, INSET, 182 "/0 /10 /20 /30 /40 /50 /60 /70 /80 /90 /100"); 183 linesperregion = 2 + secs; 184 for (i = 0; i < dk_ndrive; i++) 185 if (cur.dk_select[i] /*&& cur.dk_bytes[i] != 0.0*/) { 186 if (row > getmaxy(wnd) - linesperregion) 187 break; 188 mvwprintw(wnd, row++, 0, "%7.7s KBps|", cur.dk_name[i]); 189 mvwaddstr(wnd, row++, 0, " tps|"); 190 if (secs) 191 mvwaddstr(wnd, row++, 0, " msec|"); 192 } 193 return (row); 194 } 195 196 197 void 198 showiostat() 199 { 200 int i, row, col; 201 202 if (dk_ndrive == 0) 203 return; 204 dkswap(); 205 206 etime = 0; 207 for(i = 0; i < CPUSTATES; i++) { 208 etime += cur.cp_time[i]; 209 } 210 if (etime == 0.0) 211 etime = 1.0; 212 etime /= (float) hz; 213 row = 1; 214 215 /* 216 * Interrupt CPU state not calculated yet. 217 */ 218 for (i = 0; i < CPUSTATES; i++) 219 stat1(row++, i); 220 if (!numbers) { 221 row += 2; 222 for (i = 0; i < dk_ndrive; i++) 223 if (cur.dk_select[i] /*&& cur.dk_bytes[i] != 0.0*/) { 224 if (row > getmaxy(wnd) - linesperregion) 225 break; 226 row = stats(row, INSET, i); 227 } 228 return; 229 } 230 col = 0; 231 wmove(wnd, row + linesperregion, 0); 232 wdeleteln(wnd); 233 wmove(wnd, row + 3, 0); 234 winsertln(wnd); 235 for (i = 0; i < dk_ndrive; i++) 236 if (cur.dk_select[i] /*&& cur.dk_bytes[i] != 0.0*/) { 237 if (col + COLWIDTH >= getmaxx(wnd)) { 238 col = 0, row += linesperregion + 1; 239 if (row > getmaxy(wnd) - (linesperregion + 1)) 240 break; 241 wmove(wnd, row + linesperregion, 0); 242 wdeleteln(wnd); 243 wmove(wnd, row + 3, 0); 244 winsertln(wnd); 245 } 246 (void) stats(row + 3, col, i); 247 col += COLWIDTH; 248 } 249 } 250 251 static int 252 stats(row, col, dn) 253 int row, col, dn; 254 { 255 double atime, words; 256 257 /* time busy in disk activity */ 258 atime = (double)cur.dk_time[dn].tv_sec + 259 ((double)cur.dk_time[dn].tv_usec / (double)1000000); 260 261 words = cur.dk_bytes[dn] / 1024.0; /* # of K transferred */ 262 if (numbers) { 263 mvwprintw(wnd, row, col, " %3.0f%4.0f%5.1f", 264 words / etime, cur.dk_xfer[dn] / etime, atime / etime); 265 return (row); 266 } 267 wmove(wnd, row++, col); 268 histogram(words / etime, 50, 0.5); 269 wmove(wnd, row++, col); 270 histogram(cur.dk_xfer[dn] / etime, 50, 0.5); 271 if (secs) { 272 wmove(wnd, row++, col); 273 atime *= 1000; /* In milliseconds */ 274 histogram(atime / etime, 50, 0.5); 275 } 276 return (row); 277 } 278 279 static void 280 stat1(row, o) 281 int row, o; 282 { 283 int i; 284 double time; 285 286 time = 0; 287 for (i = 0; i < CPUSTATES; i++) 288 time += cur.cp_time[i]; 289 if (time == 0.0) 290 time = 1.0; 291 wmove(wnd, row, INSET); 292 #define CPUSCALE 0.5 293 histogram(100.0 * cur.cp_time[o] / time, 50, CPUSCALE); 294 } 295 296 static void 297 histogram(val, colwidth, scale) 298 double val; 299 int colwidth; 300 double scale; 301 { 302 char buf[10]; 303 int k; 304 int v = (int)(val * scale) + 0.5; 305 306 k = MIN(v, colwidth); 307 if (v > colwidth) { 308 snprintf(buf, sizeof buf, "%4.1f", val); 309 k -= strlen(buf); 310 while (k--) 311 waddch(wnd, 'X'); 312 waddstr(wnd, buf); 313 wclrtoeol(wnd); 314 return; 315 } 316 while (k--) 317 waddch(wnd, 'X'); 318 wclrtoeol(wnd); 319 } 320 321 void 322 iostat_bars (args) 323 char *args; 324 { 325 numbers = 0; 326 wclear(wnd); 327 labeliostat(); 328 refresh(); 329 } 330 331 void 332 iostat_numbers (args) 333 char *args; 334 { 335 numbers = 1; 336 wclear(wnd); 337 labeliostat(); 338 refresh(); 339 } 340 341 void 342 iostat_secs (args) 343 char *args; 344 { 345 secs = !secs; 346 wclear(wnd); 347 labeliostat(); 348 refresh(); 349 } 350
Indexes created Tue Sep 23 23:09:58 GMT 2025