usr.bin/systat/iostat.c

   1 /*      $NetBSD: iostat.c,v 1.36 2006/04/14 13:14:06 blymn 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. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 #if 0
  35 static char sccsid[] = "@(#)iostat.c    8.1 (Berkeley) 6/6/93";
  36 #endif
  37 __RCSID("$NetBSD: iostat.c,v 1.36 2006/04/14 13:14:06 blymn Exp $");
  38 #endif /* not lint */
  39
  40 #include <sys/param.h>
  41
  42 #include <string.h>
  43
  44 #include "systat.h"
  45 #include "extern.h"
  46 #include "drvstats.h"
  47
  48 static  int linesperregion;
  49 static  double etime;
  50 static  int numbers = 0;                /* default display bar graphs */
  51 static  int secs = 0;                   /* default seconds shown */
  52 static  int read_write = 0;             /* default read/write shown */
  53
  54 static int barlabels(int);
  55 static void histogram(double, int, double);
  56 static int numlabels(int);
  57 static int stats(int, int, int);
  58 static void stat1(int, int);
  59
  60
  61 WINDOW *
  62 openiostat(void)
  63 {
  64
  65         return (subwin(stdscr, -1, 0, 5, 0));
  66 }
  67
  68 void
  69 closeiostat(WINDOW *w)
  70 {
  71
  72         if (w == NULL)
  73                 return;
  74         wclear(w);
  75         wrefresh(w);
  76         delwin(w);
  77 }
  78
  79 int
  80 initiostat(void)
  81 {
  82
  83         drvinit(1);
  84         cpureadstats();
  85         drvreadstats();
  86         return(1);
  87 }
  88
  89 void
  90 fetchiostat(void)
  91 {
  92
  93         cpureadstats();
  94
  95         if (ndrive != 0)
  96                 drvreadstats();
  97 }
  98
  99 #define INSET   14
 100
 101 void
 102 labeliostat(void)
 103 {
 104         int row;
 105
 106         if (ndrive == 0) {
 107                 error("No drives defined.");
 108                 return;
 109         }
 110         row = 0;
 111         wmove(wnd, row, 0); wclrtobot(wnd);
 112         mvwaddstr(wnd, row++, INSET,
 113             "/0   /10  /20  /30  /40  /50  /60  /70  /80  /90  /100");
 114         mvwaddstr(wnd, row++, 0, "    CPU  user|");
 115         mvwaddstr(wnd, row++, 0, "         nice|");
 116         mvwaddstr(wnd, row++, 0, "       system|");
 117         mvwaddstr(wnd, row++, 0, "    interrupt|");
 118         mvwaddstr(wnd, row++, 0, "         idle|");
 119         if (numbers)
 120                 row = numlabels(row + 1);
 121         else
 122                 row = barlabels(row + 1);
 123 }
 124
 125 static int
 126 numlabels(int row)
 127 {
 128         int col, regions;
 129         size_t i, ndrives;
 130
 131 #define COLWIDTH        (9 + secs * 5 + 1 + read_write * 9 + 1)
 132 #define DRIVESPERLINE   ((getmaxx(wnd) + 1) / COLWIDTH)
 133         for (ndrives = 0, i = 0; i < ndrive; i++)
 134                 if (cur.select[i])
 135                         ndrives++;
 136
 137         regions = howmany(ndrives, DRIVESPERLINE);
 138         /*
 139          * Deduct -regions for blank line after each scrolling region.
 140          */
 141         linesperregion = (getmaxy(wnd) - row - regions + 1) / regions;
 142         /*
 143          * Minimum region contains space for two
 144          * label lines and one line of statistics.
 145          */
 146         if (linesperregion < 3)
 147                 linesperregion = 3;
 148         col = 0;
 149         for (i = 0; i < ndrive; i++)
 150                 if (cur.select[i]) {
 151                         if (col + COLWIDTH - 1 > getmaxx(wnd)) {
 152                                 col = 0, row += linesperregion + 1;
 153                                 if (row > getmaxy(wnd) - (linesperregion))
 154                                         break;
 155                         }
 156
 157                         mvwprintw(wnd, row, col + 5, "%s", cur.name[i]);
 158
 159                         if (read_write)
 160                                 mvwprintw(wnd, row, col + 11 + secs * 5,
 161                                     "(write)");
 162                         mvwprintw(wnd, row + 1, col, " kBps %s",
 163                                 read_write ? "r/s" : "tps");
 164                         if (secs)
 165                                 waddstr(wnd, "  sec");
 166                         if (read_write)
 167                                 waddstr(wnd, "  kBps w/s");
 168                         col += COLWIDTH;
 169                 }
 170         if (col)
 171                 row += linesperregion + 1;
 172         return (row);
 173 }
 174
 175 static int
 176 barlabels(int row)
 177 {
 178         size_t i;
 179
 180         mvwaddstr(wnd, row++, INSET,
 181             "/0   /10  /20  /30  /40  /50  /60  /70  /80  /90  /100");
 182         linesperregion = 2 + secs + (read_write ? 2 : 0);
 183         for (i = 0; i < ndrive; i++) {
 184                 if (cur.select[i]) {
 185                         if (row > getmaxy(wnd) - linesperregion)
 186                                 break;
 187                         mvwprintw(wnd, row++, 0, "%7.7s  kBps|",
 188                             cur.name[i]);
 189                         mvwaddstr(wnd, row++, 0, "          tps|");
 190                         if (read_write) {
 191                                 mvwprintw(wnd, row++, 0, " (write) kBps|");
 192                                 mvwaddstr(wnd, row++, 0, "          tps|");
 193                         }
 194                         if (secs)
 195                                 mvwaddstr(wnd, row++, 0, "         msec|");
 196                 }
 197         }
 198
 199         return (row);
 200 }
 201
 202 void
 203 showiostat(void)
 204 {
 205         int row, col;
 206         size_t i;
 207
 208         if (ndrive == 0)
 209                 return;
 210         cpuswap();
 211         drvswap();
 212
 213         etime = cur.cp_etime;
 214         row = 1;
 215
 216         /*
 217          * Interrupt CPU state not calculated yet.
 218          */
 219         for (i = 0; i < CPUSTATES; i++)
 220                 stat1(row++, i);
 221         if (!numbers) {
 222                 row += 2;
 223                 for (i = 0; i < ndrive; i++)
 224                         if (cur.select[i]) {
 225                                 if (row > getmaxy(wnd) - linesperregion)
 226                                         break;
 227                                 row = stats(row, INSET, i);
 228                         }
 229                 return;
 230         }
 231         col = 0;
 232         wmove(wnd, row + linesperregion, 0);
 233         wdeleteln(wnd);
 234         wmove(wnd, row + 3, 0);
 235         winsertln(wnd);
 236         for (i = 0; i < ndrive; i++)
 237                 if (cur.select[i]) {
 238                         if (col + COLWIDTH - 1 > getmaxx(wnd)) {
 239                                 col = 0, row += linesperregion + 1;
 240                                 if (row > getmaxy(wnd) - (linesperregion + 1))
 241                                         break;
 242                                 wmove(wnd, row + linesperregion, 0);
 243                                 wdeleteln(wnd);
 244                                 wmove(wnd, row + 3, 0);
 245                                 winsertln(wnd);
 246                         }
 247                         (void) stats(row + 3, col, i);
 248                         col += COLWIDTH;
 249                 }
 250 }
 251
 252 static int
 253 stats(int row, int col, int dn)
 254 {
 255         double atime, rwords, wwords;
 256         uint64_t rxfer;
 257
 258         /* time busy in disk activity */
 259         atime = (double)cur.time[dn].tv_sec +
 260                 ((double)cur.time[dn].tv_usec / (double)1000000);
 261
 262         /* # of k transferred */
 263         rwords = cur.rbytes[dn] / 1024.0;
 264         wwords = cur.wbytes[dn] / 1024.0;
 265         rxfer = cur.rxfer[dn];
 266         if (!read_write) {
 267                 rwords += wwords;
 268                 rxfer += cur.wxfer[dn];
 269         }
 270         if (numbers) {
 271                 mvwprintw(wnd, row, col, "%5.0f%4.0f",
 272                     rwords / etime, rxfer / etime);
 273                 if (secs)
 274                         wprintw(wnd, "%5.1f", atime / etime);
 275                 if (read_write)
 276                         wprintw(wnd, " %5.0f%4.0f",
 277                             wwords / etime, cur.wxfer[dn] / etime);
 278                 return (row);
 279         }
 280
 281         wmove(wnd, row++, col);
 282         histogram(rwords / etime, 50, 0.5);
 283         wmove(wnd, row++, col);
 284         histogram(rxfer / etime, 50, 0.5);
 285         if (read_write) {
 286                 wmove(wnd, row++, col);
 287                 histogram(wwords / etime, 50, 0.5);
 288                 wmove(wnd, row++, col);
 289                 histogram(cur.wxfer[dn] / etime, 50, 0.5);
 290         }
 291
 292         if (secs) {
 293                 wmove(wnd, row++, col);
 294                 atime *= 1000;  /* In milliseconds */
 295                 histogram(atime / etime, 50, 0.5);
 296         }
 297         return (row);
 298 }
 299
 300 static void
 301 stat1(int row, int o)
 302 {
 303         size_t i;
 304         double total_time;
 305
 306         total_time = 0;
 307         for (i = 0; i < CPUSTATES; i++)
 308                 total_time += cur.cp_time[i];
 309         if (total_time == 0.0)
 310                 total_time = 1.0;
 311         wmove(wnd, row, INSET);
 312 #define CPUSCALE        0.5
 313         histogram(100.0 * cur.cp_time[o] / total_time, 50, CPUSCALE);
 314 }
 315
 316 static void
 317 histogram(double val, int colwidth, double scale)
 318 {
 319         int v = (int)(val * scale + 0.5);
 320         int factor = 1;
 321         int y, x;
 322
 323         while (v > colwidth) {
 324                 v = (v + 5) / 10;
 325                 factor *= 10;
 326         }
 327         getyx(wnd, y, x);
 328         wclrtoeol(wnd);
 329         whline(wnd, 'X', v);
 330         if (factor != 1)
 331                 mvwprintw(wnd, y, x + colwidth + 1, "* %d ", factor);
 332 }
 333
 334 void
 335 iostat_bars(char *args)
 336 {
 337         numbers = 0;
 338         wclear(wnd);
 339         labeliostat();
 340         refresh();
 341 }
 342
 343 void
 344 iostat_numbers(char *args)
 345 {
 346         numbers = 1;
 347         wclear(wnd);
 348         labeliostat();
 349         refresh();
 350 }
 351
 352 void
 353 iostat_secs(char *args)
 354 {
 355         secs = !secs;
 356         wclear(wnd);
 357         labeliostat();
 358         refresh();
 359 }
 360
 361 void
 362 iostat_rw(char *args)
 363 {
 364         read_write ^= 1;
 365         wclear(wnd);
 366         labeliostat();
 367         refresh();
 368 }
 369
 370 void
 371 iostat_all(char *args)
 372 {
 373         read_write = 0;
 374         wclear(wnd);
 375         labeliostat();
 376         refresh();
 377 }