vmstat.c revision 113460
1/* 2 * Copyright (c) 1980, 1986, 1991, 1993 3 * The Regents of the University of California. 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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#include <sys/cdefs.h> 35 36__FBSDID("$FreeBSD: head/usr.bin/vmstat/vmstat.c 113460 2003-04-14 07:21:03Z tjr $"); 37 38#ifndef lint 39static const char copyright[] = 40"@(#) Copyright (c) 1980, 1986, 1991, 1993\n\ 41 The Regents of the University of California. All rights reserved.\n"; 42#endif 43 44#ifndef lint 45static const char sccsid[] = "@(#)vmstat.c 8.1 (Berkeley) 6/6/93"; 46#endif 47 48#include <sys/param.h> 49#include <sys/time.h> 50#include <sys/proc.h> 51#include <sys/uio.h> 52#include <sys/namei.h> 53#include <sys/malloc.h> 54#include <sys/signal.h> 55#include <sys/fcntl.h> 56#include <sys/ioctl.h> 57#include <sys/resource.h> 58#include <sys/sysctl.h> 59#include <sys/vmmeter.h> 60 61#include <vm/vm_param.h> 62 63#include <ctype.h> 64#include <devstat.h> 65#include <err.h> 66#include <errno.h> 67#include <kvm.h> 68#include <limits.h> 69#include <nlist.h> 70#include <paths.h> 71#include <stdio.h> 72#include <stdlib.h> 73#include <string.h> 74#include <sysexits.h> 75#include <time.h> 76#include <unistd.h> 77 78static char da[] = "da"; 79 80static struct nlist namelist[] = { 81#define X_CPTIME 0 82 { "_cp_time" }, 83#define X_SUM 1 84 { "_cnt" }, 85#define X_BOOTTIME 2 86 { "_boottime" }, 87#define X_HZ 3 88 { "_hz" }, 89#define X_STATHZ 4 90 { "_stathz" }, 91#define X_NCHSTATS 5 92 { "_nchstats" }, 93#define X_INTRNAMES 6 94 { "_intrnames" }, 95#define X_EINTRNAMES 7 96 { "_eintrnames" }, 97#define X_INTRCNT 8 98 { "_intrcnt" }, 99#define X_EINTRCNT 9 100 { "_eintrcnt" }, 101#ifdef notyet 102#define X_DEFICIT 10 103 { "_deficit" }, 104#define X_REC 11 105 { "_rectime" }, 106#define X_PGIN 12 107 { "_pgintime" }, 108#define X_XSTATS 13 109 { "_xstats" }, 110#define X_END 14 111#else 112#define X_END 10 113#endif 114 { "" }, 115}; 116 117struct statinfo cur, last; 118int num_devices, maxshowdevs; 119long generation; 120struct device_selection *dev_select; 121int num_selected; 122struct devstat_match *matches; 123int num_matches = 0; 124int num_devices_specified, num_selections; 125long select_generation; 126char **specified_devices; 127devstat_select_mode select_mode; 128 129struct vmmeter sum, osum; 130 131int winlines = 20; 132int nflag = 0; 133 134kvm_t *kd; 135 136#define FORKSTAT 0x01 137#define INTRSTAT 0x02 138#define MEMSTAT 0x04 139#define SUMSTAT 0x08 140#define TIMESTAT 0x10 141#define VMSTAT 0x20 142#define ZMEMSTAT 0x40 143 144static void cpustats(void); 145static void devstats(void); 146static void dosysctl(char *); 147static void domem(void); 148static void dointr(void); 149static void dosum(void); 150static void doforkst(void); 151static void dovmstat(u_int, int); 152static void dozmem(void); 153static void kread(int, void *, size_t); 154static void needhdr(int); 155static void printhdr(void); 156static void usage(void); 157 158static long pct(long, long); 159static long getuptime(void); 160 161char **getdrivedata(char **); 162 163int 164main(argc, argv) 165 int argc; 166 char **argv; 167{ 168 int c, todo; 169 u_int interval; 170 int reps; 171 char *memf, *nlistf; 172 char errbuf[_POSIX2_LINE_MAX]; 173 174 memf = nlistf = NULL; 175 interval = reps = todo = 0; 176 maxshowdevs = 2; 177 while ((c = getopt(argc, argv, "c:fiM:mN:n:p:stw:z")) != -1) { 178 switch (c) { 179 case 'c': 180 reps = atoi(optarg); 181 break; 182 case 'f': 183 todo |= FORKSTAT; 184 break; 185 case 'i': 186 todo |= INTRSTAT; 187 break; 188 case 'M': 189 memf = optarg; 190 break; 191 case 'm': 192 todo |= MEMSTAT; 193 break; 194 case 'N': 195 nlistf = optarg; 196 break; 197 case 'n': 198 nflag = 1; 199 maxshowdevs = atoi(optarg); 200 if (maxshowdevs < 0) 201 errx(1, "number of devices %d is < 0", 202 maxshowdevs); 203 break; 204 case 'p': 205 if (devstat_buildmatch(optarg, &matches, &num_matches) != 0) 206 errx(1, "%s", devstat_errbuf); 207 break; 208 case 's': 209 todo |= SUMSTAT; 210 break; 211 case 't': 212#ifdef notyet 213 todo |= TIMESTAT; 214#else 215 errx(EX_USAGE, "sorry, -t is not (re)implemented yet"); 216#endif 217 break; 218 case 'w': 219 interval = atoi(optarg); 220 break; 221 case 'z': 222 todo |= ZMEMSTAT; 223 break; 224 case '?': 225 default: 226 usage(); 227 } 228 } 229 argc -= optind; 230 argv += optind; 231 232 if (todo == 0) 233 todo = VMSTAT; 234 235 /* 236 * Discard setgid privileges if not the running kernel so that bad 237 * guys can't print interesting stuff from kernel memory. 238 */ 239 if (nlistf != NULL || memf != NULL) 240 setgid(getgid()); 241 242 kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); 243 if (kd == 0) 244 errx(1, "kvm_openfiles: %s", errbuf); 245 setgid(getgid()); 246 247 if ((c = kvm_nlist(kd, namelist)) != 0) { 248 if (c > 0) { 249 warnx("undefined symbols:"); 250 for (c = 0; 251 c < (int)(sizeof(namelist)/sizeof(namelist[0])); 252 c++) 253 if (namelist[c].n_type == 0) 254 (void)fprintf(stderr, " %s", 255 namelist[c].n_name); 256 (void)fputc('\n', stderr); 257 } else 258 warnx("kvm_nlist: %s", kvm_geterr(kd)); 259 exit(1); 260 } 261 262 if (todo & VMSTAT) { 263 struct winsize winsize; 264 265 /* 266 * Make sure that the userland devstat version matches the 267 * kernel devstat version. If not, exit and print a 268 * message informing the user of his mistake. 269 */ 270 if (devstat_checkversion(NULL) < 0) 271 errx(1, "%s", devstat_errbuf); 272 273 274 argv = getdrivedata(argv); 275 winsize.ws_row = 0; 276 (void) ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&winsize); 277 if (winsize.ws_row > 0) 278 winlines = winsize.ws_row; 279 280 } 281 282#define BACKWARD_COMPATIBILITY 283#ifdef BACKWARD_COMPATIBILITY 284 if (*argv) { 285 interval = atoi(*argv); 286 if (*++argv) 287 reps = atoi(*argv); 288 } 289#endif 290 291 if (interval) { 292 if (!reps) 293 reps = -1; 294 } else if (reps) 295 interval = 1; 296 297 if (todo & FORKSTAT) 298 doforkst(); 299 if (todo & MEMSTAT) 300 domem(); 301 if (todo & ZMEMSTAT) 302 dozmem(); 303 if (todo & SUMSTAT) 304 dosum(); 305#ifdef notyet 306 if (todo & TIMESTAT) 307 dotimes(); 308#endif 309 if (todo & INTRSTAT) 310 dointr(); 311 if (todo & VMSTAT) 312 dovmstat(interval, reps); 313 exit(0); 314} 315 316char ** 317getdrivedata(argv) 318 char **argv; 319{ 320 if ((num_devices = devstat_getnumdevs(NULL)) < 0) 321 errx(1, "%s", devstat_errbuf); 322 323 cur.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo)); 324 last.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo)); 325 bzero(cur.dinfo, sizeof(struct devinfo)); 326 bzero(last.dinfo, sizeof(struct devinfo)); 327 328 if (devstat_getdevs(NULL, &cur) == -1) 329 errx(1, "%s", devstat_errbuf); 330 331 num_devices = cur.dinfo->numdevs; 332 generation = cur.dinfo->generation; 333 334 specified_devices = (char **)malloc(sizeof(char *)); 335 for (num_devices_specified = 0; *argv; ++argv) { 336 if (isdigit(**argv)) 337 break; 338 num_devices_specified++; 339 specified_devices = (char **)realloc(specified_devices, 340 sizeof(char *) * 341 num_devices_specified); 342 specified_devices[num_devices_specified - 1] = *argv; 343 } 344 dev_select = NULL; 345 346 if (nflag == 0 && maxshowdevs < num_devices_specified) 347 maxshowdevs = num_devices_specified; 348 349 /* 350 * People are generally only interested in disk statistics when 351 * they're running vmstat. So, that's what we're going to give 352 * them if they don't specify anything by default. We'll also give 353 * them any other random devices in the system so that we get to 354 * maxshowdevs devices, if that many devices exist. If the user 355 * specifies devices on the command line, either through a pattern 356 * match or by naming them explicitly, we will give the user only 357 * those devices. 358 */ 359 if ((num_devices_specified == 0) && (num_matches == 0)) { 360 if (devstat_buildmatch(da, &matches, &num_matches) != 0) 361 errx(1, "%s", devstat_errbuf); 362 363 select_mode = DS_SELECT_ADD; 364 } else 365 select_mode = DS_SELECT_ONLY; 366 367 /* 368 * At this point, selectdevs will almost surely indicate that the 369 * device list has changed, so we don't look for return values of 0 370 * or 1. If we get back -1, though, there is an error. 371 */ 372 if (devstat_selectdevs(&dev_select, &num_selected, &num_selections, 373 &select_generation, generation, cur.dinfo->devices, 374 num_devices, matches, num_matches, specified_devices, 375 num_devices_specified, select_mode, 376 maxshowdevs, 0) == -1) 377 errx(1, "%s", devstat_errbuf); 378 379 return(argv); 380} 381 382long 383getuptime() 384{ 385 static struct timeval boottime; 386 static time_t now; 387 time_t uptime; 388 389 if (boottime.tv_sec == 0) 390 kread(X_BOOTTIME, &boottime, sizeof(boottime)); 391 (void)time(&now); 392 uptime = now - boottime.tv_sec; 393 if (uptime <= 0 || uptime > 60*60*24*365*10) 394 errx(1, "time makes no sense; namelist must be wrong"); 395 return(uptime); 396} 397 398int hz, hdrcnt; 399 400void 401dovmstat(interval, reps) 402 u_int interval; 403 int reps; 404{ 405 struct vmtotal total; 406 time_t uptime, halfuptime; 407 struct devinfo *tmp_dinfo; 408 int mib[2]; 409 size_t size; 410 411 uptime = getuptime(); 412 halfuptime = uptime / 2; 413 (void)signal(SIGCONT, needhdr); 414 415 if (namelist[X_STATHZ].n_type != 0 && namelist[X_STATHZ].n_value != 0) 416 kread(X_STATHZ, &hz, sizeof(hz)); 417 if (!hz) 418 kread(X_HZ, &hz, sizeof(hz)); 419 420 for (hdrcnt = 1;;) { 421 if (!--hdrcnt) 422 printhdr(); 423 kread(X_CPTIME, cur.cp_time, sizeof(cur.cp_time)); 424 425 tmp_dinfo = last.dinfo; 426 last.dinfo = cur.dinfo; 427 cur.dinfo = tmp_dinfo; 428 last.snap_time = cur.snap_time; 429 430 /* 431 * Here what we want to do is refresh our device stats. 432 * getdevs() returns 1 when the device list has changed. 433 * If the device list has changed, we want to go through 434 * the selection process again, in case a device that we 435 * were previously displaying has gone away. 436 */ 437 switch (devstat_getdevs(NULL, &cur)) { 438 case -1: 439 errx(1, "%s", devstat_errbuf); 440 break; 441 case 1: { 442 int retval; 443 444 num_devices = cur.dinfo->numdevs; 445 generation = cur.dinfo->generation; 446 447 retval = devstat_selectdevs(&dev_select, &num_selected, 448 &num_selections, &select_generation, 449 generation, cur.dinfo->devices, 450 num_devices, matches, num_matches, 451 specified_devices, 452 num_devices_specified, select_mode, 453 maxshowdevs, 0); 454 switch (retval) { 455 case -1: 456 errx(1, "%s", devstat_errbuf); 457 break; 458 case 1: 459 printhdr(); 460 break; 461 default: 462 break; 463 } 464 } 465 default: 466 break; 467 } 468 469 kread(X_SUM, &sum, sizeof(sum)); 470 size = sizeof(total); 471 mib[0] = CTL_VM; 472 mib[1] = VM_TOTAL; 473 if (sysctl(mib, 2, &total, &size, NULL, 0) < 0) { 474 (void)printf("Can't get kerninfo: %s\n", 475 strerror(errno)); 476 bzero(&total, sizeof(total)); 477 } 478 (void)printf("%2d %1d %1d", 479 total.t_rq - 1, total.t_dw + total.t_pw, total.t_sw); 480#define vmstat_pgtok(a) ((a) * sum.v_page_size >> 10) 481#define rate(x) (((x) + halfuptime) / uptime) /* round */ 482 (void)printf(" %7ld %6ld ", (long)vmstat_pgtok(total.t_avm), 483 (long)vmstat_pgtok(total.t_free)); 484 (void)printf("%4lu ", 485 (u_long)rate(sum.v_vm_faults - osum.v_vm_faults)); 486 (void)printf("%3lu ", 487 (u_long)rate(sum.v_reactivated - osum.v_reactivated)); 488 (void)printf("%3lu ", 489 (u_long)rate(sum.v_swapin + sum.v_vnodein - 490 (osum.v_swapin + osum.v_vnodein))); 491 (void)printf("%3lu ", 492 (u_long)rate(sum.v_swapout + sum.v_vnodeout - 493 (osum.v_swapout + osum.v_vnodeout))); 494 (void)printf("%3lu ", 495 (u_long)rate(sum.v_tfree - osum.v_tfree)); 496 (void)printf("%3lu ", 497 (u_long)rate(sum.v_pdpages - osum.v_pdpages)); 498 devstats(); 499 (void)printf("%4lu %4lu %3lu ", 500 (u_long)rate(sum.v_intr - osum.v_intr), 501 (u_long)rate(sum.v_syscall - osum.v_syscall), 502 (u_long)rate(sum.v_swtch - osum.v_swtch)); 503 cpustats(); 504 (void)printf("\n"); 505 (void)fflush(stdout); 506 if (reps >= 0 && --reps <= 0) 507 break; 508 osum = sum; 509 uptime = interval; 510 /* 511 * We round upward to avoid losing low-frequency events 512 * (i.e., >= 1 per interval but < 1 per second). 513 */ 514 if (interval != 1) 515 halfuptime = (uptime + 1) / 2; 516 else 517 halfuptime = 0; 518 (void)sleep(interval); 519 } 520} 521 522void 523printhdr() 524{ 525 int i, num_shown; 526 527 num_shown = (num_selected < maxshowdevs) ? num_selected : maxshowdevs; 528 (void)printf(" procs memory page%*s", 19, ""); 529 if (num_shown > 1) 530 (void)printf(" disks %*s", num_shown * 4 - 7, ""); 531 else if (num_shown == 1) 532 (void)printf("disk"); 533 (void)printf(" faults cpu\n"); 534 (void)printf(" r b w avm fre flt re pi po fr sr "); 535 for (i = 0; i < num_devices; i++) 536 if ((dev_select[i].selected) 537 && (dev_select[i].selected <= maxshowdevs)) 538 (void)printf("%c%c%d ", dev_select[i].device_name[0], 539 dev_select[i].device_name[1], 540 dev_select[i].unit_number); 541 (void)printf(" in sy cs us sy id\n"); 542 hdrcnt = winlines - 2; 543} 544 545/* 546 * Force a header to be prepended to the next output. 547 */ 548void 549needhdr(dummy) 550 int dummy __unused; 551{ 552 553 hdrcnt = 1; 554} 555 556#ifdef notyet 557void 558dotimes() 559{ 560 u_int pgintime, rectime; 561 562 kread(X_REC, &rectime, sizeof(rectime)); 563 kread(X_PGIN, &pgintime, sizeof(pgintime)); 564 kread(X_SUM, &sum, sizeof(sum)); 565 (void)printf("%u reclaims, %u total time (usec)\n", 566 sum.v_pgrec, rectime); 567 (void)printf("average: %u usec / reclaim\n", rectime / sum.v_pgrec); 568 (void)printf("\n"); 569 (void)printf("%u page ins, %u total time (msec)\n", 570 sum.v_pgin, pgintime / 10); 571 (void)printf("average: %8.1f msec / page in\n", 572 pgintime / (sum.v_pgin * 10.0)); 573} 574#endif 575 576long 577pct(top, bot) 578 long top, bot; 579{ 580 long ans; 581 582 if (bot == 0) 583 return(0); 584 ans = (quad_t)top * 100 / bot; 585 return (ans); 586} 587 588#define PCT(top, bot) pct((long)(top), (long)(bot)) 589 590void 591dosum() 592{ 593 struct nchstats lnchstats; 594 long nchtotal; 595 596 kread(X_SUM, &sum, sizeof(sum)); 597 (void)printf("%9u cpu context switches\n", sum.v_swtch); 598 (void)printf("%9u device interrupts\n", sum.v_intr); 599 (void)printf("%9u software interrupts\n", sum.v_soft); 600 (void)printf("%9u traps\n", sum.v_trap); 601 (void)printf("%9u system calls\n", sum.v_syscall); 602 (void)printf("%9u kernel threads created\n", sum.v_kthreads); 603 (void)printf("%9u fork() calls\n", sum.v_forks); 604 (void)printf("%9u vfork() calls\n", sum.v_vforks); 605 (void)printf("%9u rfork() calls\n", sum.v_rforks); 606 (void)printf("%9u swap pager pageins\n", sum.v_swapin); 607 (void)printf("%9u swap pager pages paged in\n", sum.v_swappgsin); 608 (void)printf("%9u swap pager pageouts\n", sum.v_swapout); 609 (void)printf("%9u swap pager pages paged out\n", sum.v_swappgsout); 610 (void)printf("%9u vnode pager pageins\n", sum.v_vnodein); 611 (void)printf("%9u vnode pager pages paged in\n", sum.v_vnodepgsin); 612 (void)printf("%9u vnode pager pageouts\n", sum.v_vnodeout); 613 (void)printf("%9u vnode pager pages paged out\n", sum.v_vnodepgsout); 614 (void)printf("%9u page daemon wakeups\n", sum.v_pdwakeups); 615 (void)printf("%9u pages examined by the page daemon\n", sum.v_pdpages); 616 (void)printf("%9u pages reactivated\n", sum.v_reactivated); 617 (void)printf("%9u copy-on-write faults\n", sum.v_cow_faults); 618 (void)printf("%9u copy-on-write optimized faults\n", sum.v_cow_optim); 619 (void)printf("%9u zero fill pages zeroed\n", sum.v_zfod); 620 (void)printf("%9u zero fill pages prezeroed\n", sum.v_ozfod); 621 (void)printf("%9u intransit blocking page faults\n", sum.v_intrans); 622 (void)printf("%9u total VM faults taken\n", sum.v_vm_faults); 623 (void)printf("%9u pages affected by kernel thread creation\n", sum.v_kthreadpages); 624 (void)printf("%9u pages affected by fork()\n", sum.v_forkpages); 625 (void)printf("%9u pages affected by vfork()\n", sum.v_vforkpages); 626 (void)printf("%9u pages affected by rfork()\n", sum.v_rforkpages); 627 (void)printf("%9u pages freed\n", sum.v_tfree); 628 (void)printf("%9u pages freed by daemon\n", sum.v_dfree); 629 (void)printf("%9u pages freed by exiting processes\n", sum.v_pfree); 630 (void)printf("%9u pages active\n", sum.v_active_count); 631 (void)printf("%9u pages inactive\n", sum.v_inactive_count); 632 (void)printf("%9u pages in VM cache\n", sum.v_cache_count); 633 (void)printf("%9u pages wired down\n", sum.v_wire_count); 634 (void)printf("%9u pages free\n", sum.v_free_count); 635 (void)printf("%9u bytes per page\n", sum.v_page_size); 636 kread(X_NCHSTATS, &lnchstats, sizeof(lnchstats)); 637 nchtotal = lnchstats.ncs_goodhits + lnchstats.ncs_neghits + 638 lnchstats.ncs_badhits + lnchstats.ncs_falsehits + 639 lnchstats.ncs_miss + lnchstats.ncs_long; 640 (void)printf("%9ld total name lookups\n", nchtotal); 641 (void)printf( 642 "%9s cache hits (%ld%% pos + %ld%% neg) system %ld%% per-directory\n", 643 "", PCT(lnchstats.ncs_goodhits, nchtotal), 644 PCT(lnchstats.ncs_neghits, nchtotal), 645 PCT(lnchstats.ncs_pass2, nchtotal)); 646 (void)printf("%9s deletions %ld%%, falsehits %ld%%, toolong %ld%%\n", "", 647 PCT(lnchstats.ncs_badhits, nchtotal), 648 PCT(lnchstats.ncs_falsehits, nchtotal), 649 PCT(lnchstats.ncs_long, nchtotal)); 650} 651 652void 653doforkst() 654{ 655 656 kread(X_SUM, &sum, sizeof(sum)); 657 (void)printf("%d forks, %d pages, average %.2f\n", 658 sum.v_forks, sum.v_forkpages, 659 sum.v_forks == 0 ? 0.0 : 660 (double)sum.v_forkpages / sum.v_forks); 661 (void)printf("%d vforks, %d pages, average %.2f\n", 662 sum.v_vforks, sum.v_vforkpages, 663 sum.v_vforks == 0 ? 0.0 : 664 (double)sum.v_vforkpages / sum.v_vforks); 665 (void)printf("%d rforks, %d pages, average %.2f\n", 666 sum.v_rforks, sum.v_rforkpages, 667 sum.v_rforks == 0 ? 0.0 : 668 (double)sum.v_rforkpages / sum.v_rforks); 669} 670 671static void 672devstats() 673{ 674 int dn, state; 675 long double transfers_per_second; 676 long double busy_seconds; 677 long tmp; 678 679 for (state = 0; state < CPUSTATES; ++state) { 680 tmp = cur.cp_time[state]; 681 cur.cp_time[state] -= last.cp_time[state]; 682 last.cp_time[state] = tmp; 683 } 684 685 busy_seconds = cur.snap_time - last.snap_time; 686 687 for (dn = 0; dn < num_devices; dn++) { 688 int di; 689 690 if ((dev_select[dn].selected == 0) 691 || (dev_select[dn].selected > maxshowdevs)) 692 continue; 693 694 di = dev_select[dn].position; 695 696 if (devstat_compute_statistics(&cur.dinfo->devices[di], 697 &last.dinfo->devices[di], busy_seconds, 698 DSM_TRANSFERS_PER_SECOND, &transfers_per_second, 699 DSM_NONE) != 0) 700 errx(1, "%s", devstat_errbuf); 701 702 (void)printf("%3.0Lf ", transfers_per_second); 703 } 704} 705 706void 707cpustats() 708{ 709 int state; 710 double lpct, total; 711 712 total = 0; 713 for (state = 0; state < CPUSTATES; ++state) 714 total += cur.cp_time[state]; 715 if (total) 716 lpct = 100.0 / total; 717 else 718 lpct = 0.0; 719 (void)printf("%2.0f ", (cur.cp_time[CP_USER] + 720 cur.cp_time[CP_NICE]) * lpct); 721 (void)printf("%2.0f ", (cur.cp_time[CP_SYS] + 722 cur.cp_time[CP_INTR]) * lpct); 723 (void)printf("%2.0f", cur.cp_time[CP_IDLE] * lpct); 724} 725 726void 727dointr() 728{ 729 u_long *intrcnt, uptime; 730 u_int64_t inttotal; 731 int nintr, inamlen; 732 char *intrname; 733 734 uptime = getuptime(); 735 nintr = namelist[X_EINTRCNT].n_value - namelist[X_INTRCNT].n_value; 736 inamlen = 737 namelist[X_EINTRNAMES].n_value - namelist[X_INTRNAMES].n_value; 738 intrcnt = malloc((size_t)nintr); 739 intrname = malloc((size_t)inamlen); 740 if (intrcnt == NULL || intrname == NULL) 741 errx(1, "malloc"); 742 kread(X_INTRCNT, intrcnt, (size_t)nintr); 743 kread(X_INTRNAMES, intrname, (size_t)inamlen); 744 (void)printf("%-14s %20s %10s\n", "interrupt", "total", "rate"); 745 inttotal = 0; 746 nintr /= sizeof(long); 747 while (--nintr >= 0) { 748 if (*intrcnt) 749 (void)printf("%-14s %20lu %10lu\n", intrname, 750 *intrcnt, *intrcnt / uptime); 751 intrname += strlen(intrname) + 1; 752 inttotal += *intrcnt++; 753 } 754 (void)printf("%-14s %20llu %10llu\n", "Total", inttotal, 755 inttotal / (u_int64_t) uptime); 756} 757 758void 759domem(void) 760{ 761 dosysctl("kern.malloc"); 762} 763 764void 765dozmem(void) 766{ 767 dosysctl("vm.zone"); 768} 769 770void 771dosysctl(char *name) 772{ 773 char *buf; 774 size_t bufsize; 775 776 buf = NULL; 777 bufsize = 1024; 778 for (;;) { 779 if ((buf = realloc(buf, bufsize)) == NULL) 780 err(1, "realloc()"); 781 if (sysctlbyname(name, buf, &bufsize, 0, NULL) == 0) 782 break; 783 if (errno != ENOMEM) 784 err(1, "sysctl()"); 785 bufsize *= 2; 786 } 787 buf[bufsize] = '\0'; /* play it safe */ 788 (void)printf("%s\n\n", buf); 789 free(buf); 790} 791 792/* 793 * kread reads something from the kernel, given its nlist index. 794 */ 795void 796kread(nlx, addr, size) 797 int nlx; 798 void *addr; 799 size_t size; 800{ 801 char *sym; 802 803 if (namelist[nlx].n_type == 0 || namelist[nlx].n_value == 0) { 804 sym = namelist[nlx].n_name; 805 if (*sym == '_') 806 ++sym; 807 errx(1, "symbol %s not defined", sym); 808 } 809 if (kvm_read(kd, namelist[nlx].n_value, addr, size) != (int)size) { 810 sym = namelist[nlx].n_name; 811 if (*sym == '_') 812 ++sym; 813 errx(1, "%s: %s", sym, kvm_geterr(kd)); 814 } 815} 816 817void 818usage() 819{ 820 (void)fprintf(stderr, "%s%s", 821 "usage: vmstat [-imsz] [-c count] [-M core] [-N system] [-w wait]\n", 822 " [-n devs] [disks]\n"); 823 exit(1); 824} 825