usr.sbin/iostat/iostat.c

   1 /*
   2  * Copyright (c) 1997, 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.sbin/iostat/iostat.c,v 1.17.2.2 2001/07/19 04:15:42 kris Exp $
  29  * $DragonFly: src/usr.sbin/iostat/iostat.c,v 1.4 2004/03/23 07:45:34 cpressey Exp $
  30  */
  31 /*
  32  * Parts of this program are derived from the original FreeBSD iostat
  33  * program:
  34  */
  35 /*-
  36  * Copyright (c) 1986, 1991, 1993
  37  *      The Regents of the University of California.  All rights reserved.
  38  *
  39  * Redistribution and use in source and binary forms, with or without
  40  * modification, are permitted provided that the following conditions
  41  * are met:
  42  * 1. Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  * 2. Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in the
  46  *    documentation and/or other materials provided with the distribution.
  47  * 3. All advertising materials mentioning features or use of this software
  48  *    must display the following acknowledgement:
  49  *      This product includes software developed by the University of
  50  *      California, Berkeley and its contributors.
  51  * 4. Neither the name of the University nor the names of its contributors
  52  *    may be used to endorse or promote products derived from this software
  53  *    without specific prior written permission.
  54  *
  55  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  56  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  57  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  58  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  59  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  60  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  61  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  62  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  63  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  64  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  65  * SUCH DAMAGE.
  66  */
  67 /*
  68  * Ideas for the new iostat statistics output modes taken from the NetBSD
  69  * version of iostat:
  70  */
  71 /*
  72  * Copyright (c) 1996 John M. Vinopal
  73  * All rights reserved.
  74  *
  75  * Redistribution and use in source and binary forms, with or without
  76  * modification, are permitted provided that the following conditions
  77  * are met:
  78  * 1. Redistributions of source code must retain the above copyright
  79  *    notice, this list of conditions and the following disclaimer.
  80  * 2. Redistributions in binary form must reproduce the above copyright
  81  *    notice, this list of conditions and the following disclaimer in the
  82  *    documentation and/or other materials provided with the distribution.
  83  * 3. All advertising materials mentioning features or use of this software
  84  *    must display the following acknowledgement:
  85  *      This product includes software developed for the NetBSD Project
  86  *      by John M. Vinopal.
  87  * 4. The name of the author may not be used to endorse or promote products
  88  *    derived from this software without specific prior written permission.
  89  *
  90  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  91  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  92  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  93  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  94  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  95  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  96  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  97  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  98  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  99  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 100  * SUCH DAMAGE.
 101  */
 102
 103 #include <sys/param.h>
 104 #include <sys/errno.h>
 105 #include <sys/dkstat.h>
 106
 107 #include <err.h>
 108 #include <ctype.h>
 109 #include <fcntl.h>
 110 #include <kvm.h>
 111 #include <stdio.h>
 112 #include <stdlib.h>
 113 #include <string.h>
 114 #include <unistd.h>
 115 #include <limits.h>
 116 #include <devstat.h>
 117
 118 struct nlist namelist[] = {
 119 #define X_TK_NIN        0
 120         { "_tk_nin" },
 121 #define X_TK_NOUT       1
 122         { "_tk_nout" },
 123 #define X_CP_TIME       2
 124         { "_cp_time" },
 125 #define X_HZ            3
 126         { "_hz" },
 127 #define X_STATHZ        4
 128         { "_stathz" },
 129 #define X_END           4
 130         { NULL },
 131 };
 132
 133 struct statinfo cur, last;
 134 int num_devices;
 135 struct device_selection *dev_select;
 136 int maxshowdevs;
 137 int dflag = 0, Iflag = 0, Cflag = 0, Tflag = 0, oflag = 0, Kflag = 0;
 138
 139 #define nlread(x, v) \
 140         kvm_read(kd, namelist[x].n_value, &(v), sizeof(v))
 141
 142 /* local function declarations */
 143 static void usage(void);
 144 static void phdr(int signo);
 145 static void devstats(int perf_select);
 146 static void cpustats(void);
 147
 148 static void
 149 usage(void)
 150 {
 151         /*
 152          * We also support the following 'traditional' syntax:
 153          * iostat [drives] [wait [count]]
 154          * This isn't mentioned in the man page, or the usage statement,
 155          * but it is supported.
 156          */
 157         fprintf(stderr, "usage: iostat [-CdhIKoT?] [-c count] [-M core]"
 158                 " [-n devs] [-N system]\n"
 159                 "\t      [-t type,if,pass] [-w wait] [drives]\n");
 160 }
 161
 162 int
 163 main(int argc, char **argv)
 164 {
 165         int c;
 166         int i;
 167         int tflag = 0, hflag = 0, cflag = 0, wflag = 0, nflag = 0;
 168         int count = 0, waittime = 0;
 169         char *memf = NULL, *nlistf = NULL;
 170         struct devstat_match *matches;
 171         int num_matches = 0;
 172         char errbuf[_POSIX2_LINE_MAX];
 173         kvm_t *kd;
 174         int hz, stathz;
 175         int headercount;
 176         long generation;
 177         int num_devices_specified;
 178         int num_selected, num_selections;
 179         long select_generation;
 180         char **specified_devices;
 181         devstat_select_mode select_mode;
 182
 183         matches = NULL;
 184         maxshowdevs = 3;
 185
 186         while ((c = getopt(argc, argv, "c:CdhIKM:n:N:ot:Tw:?")) != -1) {
 187                 switch(c) {
 188                         case 'c':
 189                                 cflag++;
 190                                 count = atoi(optarg);
 191                                 if (count < 1)
 192                                         errx(1, "count %d is < 1", count);
 193                                 break;
 194                         case 'C':
 195                                 Cflag++;
 196                                 break;
 197                         case 'd':
 198                                 dflag++;
 199                                 break;
 200                         case 'h':
 201                                 hflag++;
 202                                 break;
 203                         case 'I':
 204                                 Iflag++;
 205                                 break;
 206                         case 'K':
 207                                 Kflag++;
 208                                 break;
 209                         case 'M':
 210                                 memf = optarg;
 211                                 break;
 212                         case 'n':
 213                                 nflag++;
 214                                 maxshowdevs = atoi(optarg);
 215                                 if (maxshowdevs < 0)
 216                                         errx(1, "number of devices %d is < 0",
 217                                              maxshowdevs);
 218                                 break;
 219                         case 'N':
 220                                 nlistf = optarg;
 221                                 break;
 222                         case 'o':
 223                                 oflag++;
 224                                 break;
 225                         case 't':
 226                                 tflag++;
 227                                 if (buildmatch(optarg, &matches,
 228                                                &num_matches) != 0)
 229                                         errx(1, "%s", devstat_errbuf);
 230                                 break;
 231                         case 'T':
 232                                 Tflag++;
 233                                 break;
 234                         case 'w':
 235                                 wflag++;
 236                                 waittime = atoi(optarg);
 237                                 if (waittime < 1)
 238                                         errx(1, "wait time is < 1");
 239                                 break;
 240                         default:
 241                                 usage();
 242                                 exit(1);
 243                                 break;
 244                 }
 245         }
 246
 247         argc -= optind;
 248         argv += optind;
 249
 250         /*
 251          * Discard setgid privileges if not the running kernel so that bad
 252          * guys can't print interesting stuff from kernel memory.
 253          */
 254         if (nlistf != NULL || memf != NULL)
 255                 setgid(getgid());
 256
 257         /*
 258          * Make sure that the userland devstat version matches the kernel
 259          * devstat version.  If not, exit and print a message informing
 260          * the user of his mistake.
 261          */
 262         if (checkversion() < 0)
 263                 errx(1, "%s", devstat_errbuf);
 264
 265         /*
 266          * Figure out how many devices we should display.
 267          */
 268         if (nflag == 0) {
 269                 if (oflag > 0) {
 270                         if ((dflag > 0) && (Cflag == 0) && (Tflag == 0))
 271                                 maxshowdevs = 5;
 272                         else if ((dflag > 0) && (Tflag > 0) && (Cflag == 0))
 273                                 maxshowdevs = 5;
 274                         else
 275                                 maxshowdevs = 4;
 276                 } else {
 277                         if ((dflag > 0) && (Cflag == 0))
 278                                 maxshowdevs = 4;
 279                         else
 280                                 maxshowdevs = 3;
 281                 }
 282         }
 283
 284         /* find out how many devices we have */
 285         if ((num_devices = getnumdevs()) < 0)
 286                 err(1, "can't get number of devices");
 287
 288         if ((cur.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo))) ==
 289              NULL)
 290                 err(1, "devinfo malloc failed");
 291         if ((last.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo))) ==
 292              NULL)
 293                 err(1, "devinfo malloc failed");
 294         bzero(cur.dinfo, sizeof(struct devinfo));
 295         bzero(last.dinfo, sizeof(struct devinfo));
 296
 297         /*
 298          * Grab all the devices.  We don't look to see if the list has
 299          * changed here, since it almost certainly has.  We only look for
 300          * errors.
 301          */
 302         if (getdevs(&cur) == -1)
 303                 errx(1, "%s", devstat_errbuf);
 304
 305         num_devices = cur.dinfo->numdevs;
 306         generation = cur.dinfo->generation;
 307
 308         /*
 309          * If the user specified any devices on the command line, see if
 310          * they are in the list of devices we have now.
 311          */
 312         if ((specified_devices = (char **)malloc(sizeof(char *))) == NULL)
 313                 err(1, "specified_devices malloc failed");
 314         for (num_devices_specified = 0; *argv; ++argv) {
 315                 if (isdigit(**argv))
 316                         break;
 317                 num_devices_specified++;
 318                 specified_devices = (char **)realloc(specified_devices,
 319                                                      sizeof(char *) *
 320                                                      num_devices_specified);
 321                 specified_devices[num_devices_specified - 1] = *argv;
 322
 323         }
 324         if (nflag == 0 && maxshowdevs < num_devices_specified)
 325                 maxshowdevs = num_devices_specified;
 326
 327         dev_select = NULL;
 328
 329         if ((num_devices_specified == 0) && (num_matches == 0))
 330                 select_mode = DS_SELECT_ADD;
 331         else
 332                 select_mode = DS_SELECT_ONLY;
 333
 334         /*
 335          * At this point, selectdevs will almost surely indicate that the
 336          * device list has changed, so we don't look for return values of 0
 337          * or 1.  If we get back -1, though, there is an error.
 338          */
 339         if (selectdevs(&dev_select, &num_selected,
 340                        &num_selections, &select_generation,
 341                        generation, cur.dinfo->devices, num_devices,
 342                        matches, num_matches,
 343                        specified_devices, num_devices_specified,
 344                        select_mode, maxshowdevs, hflag) == -1)
 345                 errx(1, "%s", devstat_errbuf);
 346
 347         /*
 348          * Look for the traditional wait time and count arguments.
 349          */
 350         if (*argv) {
 351                 waittime = atoi(*argv);
 352
 353                 /* Let the user know he goofed, but keep going anyway */
 354                 if (wflag != 0)
 355                         warnx("discarding previous wait interval, using"
 356                               " %d instead", waittime);
 357                 wflag++;
 358
 359                 if (*++argv) {
 360                         count = atoi(*argv);
 361                         if (cflag != 0)
 362                                 warnx("discarding previous count, using %d"
 363                                       " instead", count);
 364                         cflag++;
 365                 } else
 366                         count = -1;
 367         }
 368
 369         /*
 370          * If the user specified a count, but not an interval, we default
 371          * to an interval of 1 second.
 372          */
 373         if ((wflag == 0) && (cflag > 0))
 374                 waittime = 1;
 375
 376         /*
 377          * If the user specified a wait time, but not a count, we want to
 378          * go on ad infinitum.  This can be redundant if the user uses the
 379          * traditional method of specifying the wait, since in that case we
 380          * already set count = -1 above.  Oh well.
 381          */
 382         if ((wflag > 0) && (cflag == 0))
 383                 count = -1;
 384
 385         kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf);
 386
 387         if (kd == 0)
 388                 errx(1, "kvm_openfiles: %s", errbuf);
 389
 390         if (kvm_nlist(kd, namelist) == -1)
 391                 errx(1, "kvm_nlist: %s", kvm_geterr(kd));
 392
 393         nlread(X_HZ, hz);
 394         nlread(X_STATHZ, stathz);
 395         if (stathz)
 396                 hz = stathz;
 397
 398         /*
 399          * If the user stops the program (control-Z) and then resumes it,
 400          * print out the header again.
 401          */
 402         signal(SIGCONT, phdr);
 403
 404         for (headercount = 1;;) {
 405                 struct devinfo *tmp_dinfo;
 406                 long tmp;
 407                 double etime;
 408
 409                 if (!--headercount) {
 410                         phdr(0);
 411                         headercount = 20;
 412                 }
 413                 kvm_read(kd, namelist[X_TK_NIN].n_value,
 414                     &cur.tk_nin, sizeof(cur.tk_nin));
 415                 kvm_read(kd, namelist[X_TK_NOUT].n_value,
 416                     &cur.tk_nout, sizeof(cur.tk_nout));
 417                 kvm_read(kd, namelist[X_CP_TIME].n_value,
 418                     cur.cp_time, sizeof(cur.cp_time));
 419
 420                 tmp_dinfo = last.dinfo;
 421                 last.dinfo = cur.dinfo;
 422                 cur.dinfo = tmp_dinfo;
 423
 424                 last.busy_time = cur.busy_time;
 425
 426                 /*
 427                  * Here what we want to do is refresh our device stats.
 428                  * getdevs() returns 1 when the device list has changed.
 429                  * If the device list has changed, we want to go through
 430                  * the selection process again, in case a device that we
 431                  * were previously displaying has gone away.
 432                  */
 433                 switch (getdevs(&cur)) {
 434                 case -1:
 435                         errx(1, "%s", devstat_errbuf);
 436                         break;
 437                 case 1: {
 438                         int retval;
 439
 440                         num_devices = cur.dinfo->numdevs;
 441                         generation = cur.dinfo->generation;
 442                         retval = selectdevs(&dev_select, &num_selected,
 443                                             &num_selections, &select_generation,
 444                                             generation, cur.dinfo->devices,
 445                                             num_devices, matches, num_matches,
 446                                             specified_devices,
 447                                             num_devices_specified,
 448                                             select_mode, maxshowdevs, hflag);
 449                         switch(retval) {
 450                         case -1:
 451                                 errx(1, "%s", devstat_errbuf);
 452                                 break;
 453                         case 1:
 454                                 phdr(0);
 455                                 headercount = 20;
 456                                 break;
 457                         default:
 458                                 break;
 459                         }
 460                         break;
 461                 }
 462                 default:
 463                         break;
 464                 }
 465
 466                 /*
 467                  * We only want to re-select devices if we're in 'top'
 468                  * mode.  This is the only mode where the devices selected
 469                  * could actually change.
 470                  */
 471                 if (hflag > 0) {
 472                         int retval;
 473                         retval = selectdevs(&dev_select, &num_selected,
 474                                             &num_selections, &select_generation,
 475                                             generation, cur.dinfo->devices,
 476                                             num_devices, matches, num_matches,
 477                                             specified_devices,
 478                                             num_devices_specified,
 479                                             select_mode, maxshowdevs, hflag);
 480                         switch(retval) {
 481                         case -1:
 482                                 errx(1,"%s", devstat_errbuf);
 483                                 break;
 484                         case 1:
 485                                 phdr(0);
 486                                 headercount = 20;
 487                                 break;
 488                         default:
 489                                 break;
 490                         }
 491                 }
 492
 493                 tmp = cur.tk_nin;
 494                 cur.tk_nin -= last.tk_nin;
 495                 last.tk_nin = tmp;
 496                 tmp = cur.tk_nout;
 497                 cur.tk_nout -= last.tk_nout;
 498                 last.tk_nout = tmp;
 499
 500                 etime = 0.0;
 501
 502                 for (i = 0; i < CPUSTATES; i++) {
 503                         tmp = cur.cp_time[i];
 504                         cur.cp_time[i] -= last.cp_time[i];
 505                         last.cp_time[i] = tmp;
 506                         etime += cur.cp_time[i];
 507                 }
 508                 if (etime == 0.0)
 509                         etime = 1.0;
 510                 etime /= (float)hz;
 511                 if ((dflag == 0) || (Tflag > 0))
 512                         printf("%4.0f%5.0f", cur.tk_nin / etime,
 513                                 cur.tk_nout/etime);
 514                 devstats(hflag);
 515                 if ((dflag == 0) || (Cflag > 0))
 516                         cpustats();
 517                 printf("\n");
 518                 fflush(stdout);
 519
 520                 if (count >= 0 && --count <= 0)
 521                         break;
 522
 523                 sleep(waittime);
 524         }
 525
 526         exit(0);
 527 }
 528
 529 static void
 530 phdr(int signo)
 531 {
 532         int i;
 533         int printed;
 534
 535         if ((dflag == 0) || (Tflag > 0))
 536                 printf("      tty");
 537         for (i = 0, printed=0;(i < num_devices) && (printed < maxshowdevs);i++){
 538                 int di;
 539                 if ((dev_select[i].selected != 0)
 540                  && (dev_select[i].selected <= maxshowdevs)) {
 541                         di = dev_select[i].position;
 542                         if (oflag > 0)
 543                                 printf("%12.6s%d ",
 544                                             cur.dinfo->devices[di].device_name,
 545                                             cur.dinfo->devices[di].unit_number);
 546                         else
 547                                 printf("%15.6s%d ",
 548                                             cur.dinfo->devices[di].device_name,
 549                                             cur.dinfo->devices[di].unit_number);
 550                         printed++;
 551                 }
 552         }
 553         if ((dflag == 0) || (Cflag > 0))
 554                 printf("            cpu\n");
 555         else
 556                 printf("\n");
 557
 558         if ((dflag == 0) || (Tflag > 0))
 559                 printf(" tin tout");
 560
 561         for (i=0, printed = 0;(i < num_devices) && (printed < maxshowdevs);i++){
 562                 if ((dev_select[i].selected != 0)
 563                  && (dev_select[i].selected <= maxshowdevs)) {
 564                         if (oflag > 0) {
 565                                 if (Iflag == 0)
 566                                         printf(" sps tps msps ");
 567                                 else
 568                                         printf(" blk xfr msps ");
 569                         } else {
 570                                 if (Iflag == 0)
 571                                         printf("  KB/t tps  MB/s ");
 572                                 else
 573                                         printf("  KB/t xfrs   MB ");
 574                         }
 575                         printed++;
 576                 }
 577         }
 578         if ((dflag == 0) || (Cflag > 0))
 579                 printf(" us ni sy in id\n");
 580         else
 581                 printf("\n");
 582
 583 }
 584
 585 static void
 586 devstats(int perf_select)
 587 {
 588         int dn;
 589         long double transfers_per_second;
 590         long double kb_per_transfer, mb_per_second;
 591         u_int64_t total_bytes, total_transfers, total_blocks;
 592         long double busy_seconds;
 593         long double total_mb;
 594         long double blocks_per_second, ms_per_transaction;
 595
 596         /*
 597          * Calculate elapsed time up front, since it's the same for all
 598          * devices.
 599          */
 600         busy_seconds = compute_etime(cur.busy_time, last.busy_time);
 601
 602         for (dn = 0; dn < num_devices; dn++) {
 603                 int di;
 604
 605                 if (((perf_select == 0) && (dev_select[dn].selected == 0))
 606                  || (dev_select[dn].selected > maxshowdevs))
 607                         continue;
 608
 609                 di = dev_select[dn].position;
 610
 611                 if (compute_stats(&cur.dinfo->devices[di],
 612                                   &last.dinfo->devices[di], busy_seconds,
 613                                   &total_bytes, &total_transfers,
 614                                   &total_blocks, &kb_per_transfer,
 615                                   &transfers_per_second, &mb_per_second,
 616                                   &blocks_per_second, &ms_per_transaction)!= 0)
 617                         errx(1, "%s", devstat_errbuf);
 618
 619                 if (perf_select != 0) {
 620                         dev_select[dn].bytes = total_bytes;
 621                         if ((dev_select[dn].selected == 0)
 622                          || (dev_select[dn].selected > maxshowdevs))
 623                                 continue;
 624                 }
 625
 626                 if (Kflag) {
 627                         int block_size = cur.dinfo->devices[di].block_size;
 628                         total_blocks = total_blocks * (block_size ?
 629                                                        block_size : 512) / 1024;
 630                 }
 631
 632                 if (oflag > 0) {
 633                         int msdig = (ms_per_transaction < 100.0) ? 1 : 0;
 634
 635                         if (Iflag == 0)
 636                                 printf("%4.0Lf%4.0Lf%5.*Lf ",
 637                                        blocks_per_second,
 638                                        transfers_per_second,
 639                                        msdig,
 640                                        ms_per_transaction);
 641                         else
 642                                 printf("%4.1qu%4.1qu%5.*Lf ",
 643                                        total_blocks,
 644                                        total_transfers,
 645                                        msdig,
 646                                        ms_per_transaction);
 647                 } else {
 648                         if (Iflag == 0)
 649                                 printf(" %5.2Lf %3.0Lf %5.2Lf ",
 650                                        kb_per_transfer,
 651                                        transfers_per_second,
 652                                        mb_per_second);
 653                         else {
 654                                 total_mb = total_bytes;
 655                                 total_mb /= 1024 * 1024;
 656
 657                                 printf(" %5.2Lf %3.1qu %5.2Lf ",
 658                                        kb_per_transfer,
 659                                        total_transfers,
 660                                        total_mb);
 661                         }
 662                 }
 663         }
 664 }
 665
 666 static void
 667 cpustats(void)
 668 {
 669         int state;
 670         double time;
 671
 672         time = 0.0;
 673
 674         for (state = 0; state < CPUSTATES; ++state)
 675                 time += cur.cp_time[state];
 676         for (state = 0; state < CPUSTATES; ++state)
 677                 printf(" %2.0f",
 678                        100. * cur.cp_time[state] / (time ? time : 1));
 679 }