1 /* $NetBSD: iostat.c,v 1.16 2000/07/05 11:03:21 ad 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 1.16 2000/07/05 11:03:21 ad 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(int); 66 static void histogram(double, int, double); 67 static int numlabels(int); 68 static int stats(int, int, int); 69 static void stat1(int, int); 70 71 72 WINDOW * 73 openiostat(void) 74 { 75 76 return (subwin(stdscr, LINES-1-5, 0, 5, 0)); 77 } 78 79 void 80 closeiostat(WINDOW *w) 81 { 82 83 if (w == NULL) 84 return; 85 wclear(w); 86 wrefresh(w); 87 delwin(w); 88 } 89 90 int 91 initiostat(void) 92 { 93 extern gid_t egid; 94 95 dkinit(1, egid); 96 dkreadstats(); 97 return(1); 98 } 99 100 void 101 fetchiostat(void) 102 { 103 104 if (dk_ndrive == 0) 105 return; 106 dkreadstats(); 107 } 108 109 #define INSET 14 110 111 void 112 labeliostat(void) 113 { 114 int row; 115 116 if (dk_ndrive == 0) { 117 error("No drives defined."); 118 return; 119 } 120 row = 0; 121 wmove(wnd, row, 0); wclrtobot(wnd); 122 mvwaddstr(wnd, row++, INSET, 123 "/0 /10 /20 /30 /40 /50 /60 /70 /80 /90 /100"); 124 mvwaddstr(wnd, row++, 0, " cpu user|"); 125 mvwaddstr(wnd, row++, 0, " nice|"); 126 mvwaddstr(wnd, row++, 0, " system|"); 127 mvwaddstr(wnd, row++, 0, " interrupt|"); 128 mvwaddstr(wnd, row++, 0, " idle|"); 129 if (numbers) 130 row = numlabels(row + 1); 131 else 132 row = barlabels(row + 1); 133 } 134 135 static int 136 numlabels(int row) 137 { 138 int i, col, regions, ndrives; 139 140 #define COLWIDTH 14 141 #define DRIVESPERLINE ((getmaxx(wnd) - INSET) / COLWIDTH) 142 for (ndrives = 0, i = 0; i < dk_ndrive; i++) 143 if (cur.dk_select[i]) 144 ndrives++; 145 regions = howmany(ndrives, DRIVESPERLINE); 146 /* 147 * Deduct -regions for blank line after each scrolling region. 148 */ 149 linesperregion = (getmaxy(wnd) - row - regions) / regions; 150 /* 151 * Minimum region contains space for two 152 * label lines and one line of statistics. 153 */ 154 if (linesperregion < 3) 155 linesperregion = 3; 156 col = 0; 157 for (i = 0; i < dk_ndrive; i++) 158 if (cur.dk_select[i] /*&& cur.dk_bytes[i] != 0.0*/) { 159 if (col + COLWIDTH >= getmaxx(wnd) - INSET) { 160 col = 0, row += linesperregion + 1; 161 if (row > getmaxy(wnd) - (linesperregion + 1)) 162 break; 163 } 164 mvwaddstr(wnd, row, col + 4, cur.dk_name[i]); 165 mvwaddstr(wnd, row + 1, col, "KBps tps sec"); 166 col += COLWIDTH; 167 } 168 if (col) 169 row += linesperregion + 1; 170 return (row); 171 } 172 173 static int 174 barlabels(int row) 175 { 176 int i; 177 178 mvwaddstr(wnd, row++, INSET, 179 "/0 /10 /20 /30 /40 /50 /60 /70 /80 /90 /100"); 180 linesperregion = 2 + secs; 181 for (i = 0; i < dk_ndrive; i++) 182 if (cur.dk_select[i] /*&& cur.dk_bytes[i] != 0.0*/) { 183 if (row > getmaxy(wnd) - linesperregion) 184 break; 185 mvwprintw(wnd, row++, 0, "%7.7s KBps|", cur.dk_name[i]); 186 mvwaddstr(wnd, row++, 0, " tps|"); 187 if (secs) 188 mvwaddstr(wnd, row++, 0, " msec|"); 189 } 190 return (row); 191 } 192 193 void 194 showiostat(void) 195 { 196 int i, row, col; 197 198 if (dk_ndrive == 0) 199 return; 200 dkswap(); 201 202 etime = 0; 203 for(i = 0; i < CPUSTATES; i++) { 204 etime += cur.cp_time[i]; 205 } 206 if (etime == 0.0) 207 etime = 1.0; 208 etime /= (float) hz; 209 row = 1; 210 211 /* 212 * Interrupt CPU state not calculated yet. 213 */ 214 for (i = 0; i < CPUSTATES; i++) 215 stat1(row++, i); 216 if (!numbers) { 217 row += 2; 218 for (i = 0; i < dk_ndrive; i++) 219 if (cur.dk_select[i] /*&& cur.dk_bytes[i] != 0.0*/) { 220 if (row > getmaxy(wnd) - linesperregion) 221 break; 222 row = stats(row, INSET, i); 223 } 224 return; 225 } 226 col = 0; 227 wmove(wnd, row + linesperregion, 0); 228 wdeleteln(wnd); 229 wmove(wnd, row + 3, 0); 230 winsertln(wnd); 231 for (i = 0; i < dk_ndrive; i++) 232 if (cur.dk_select[i] /*&& cur.dk_bytes[i] != 0.0*/) { 233 if (col + COLWIDTH >= getmaxx(wnd)) { 234 col = 0, row += linesperregion + 1; 235 if (row > getmaxy(wnd) - (linesperregion + 1)) 236 break; 237 wmove(wnd, row + linesperregion, 0); 238 wdeleteln(wnd); 239 wmove(wnd, row + 3, 0); 240 winsertln(wnd); 241 } 242 (void) stats(row + 3, col, i); 243 col += COLWIDTH; 244 } 245 } 246 247 static int 248 stats(int row, int col, int dn) 249 { 250 double atime, words; 251 252 /* time busy in disk activity */ 253 atime = (double)cur.dk_time[dn].tv_sec + 254 ((double)cur.dk_time[dn].tv_usec / (double)1000000); 255 256 words = cur.dk_bytes[dn] / 1024.0; /* # of K transferred */ 257 if (numbers) { 258 mvwprintw(wnd, row, col, " %3.0f%4.0f%5.1f", 259 words / etime, cur.dk_xfer[dn] / etime, atime / etime); 260 return (row); 261 } 262 wmove(wnd, row++, col); 263 histogram(words / etime, 50, 0.5); 264 wmove(wnd, row++, col); 265 histogram(cur.dk_xfer[dn] / etime, 50, 0.5); 266 if (secs) { 267 wmove(wnd, row++, col); 268 atime *= 1000; /* In milliseconds */ 269 histogram(atime / etime, 50, 0.5); 270 } 271 return (row); 272 } 273 274 static void 275 stat1(int row, int o) 276 { 277 int i; 278 double time; 279 280 time = 0; 281 for (i = 0; i < CPUSTATES; i++) 282 time += cur.cp_time[i]; 283 if (time == 0.0) 284 time = 1.0; 285 wmove(wnd, row, INSET); 286 #define CPUSCALE 0.5 287 histogram(100.0 * cur.cp_time[o] / time, 50, CPUSCALE); 288 } 289 290 static void 291 histogram(double val, int colwidth, double scale) 292 { 293 char buf[10]; 294 int k; 295 int v = (int)(val * scale) + 0.5; 296 297 k = MIN(v, colwidth); 298 if (v > colwidth) { 299 snprintf(buf, sizeof buf, "%4.1f", val); 300 k -= strlen(buf); 301 while (k--) 302 waddch(wnd, 'X'); 303 waddstr(wnd, buf); 304 wclrtoeol(wnd); 305 return; 306 } 307 wclrtoeol(wnd); 308 whline(wnd, 'X', k); 309 } 310 311 void 312 iostat_bars(char *args) 313 { 314 numbers = 0; 315 wclear(wnd); 316 labeliostat(); 317 refresh(); 318 } 319 320 void 321 iostat_numbers(char *args) 322 { 323 numbers = 1; 324 wclear(wnd); 325 labeliostat(); 326 refresh(); 327 } 328 329 void 330 iostat_secs(char *args) 331 { 332 secs = !secs; 333 wclear(wnd); 334 labeliostat(); 335 refresh(); 336 } 337