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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#ifndef lint 31static const char copyright[] = 32"@(#) Copyright (c) 1980, 1986, 1991, 1993\n\ 33 The Regents of the University of California. All rights reserved.\n"; 34#endif /* not lint */ 35 36#if 0 37#ifndef lint 38static char sccsid[] = "@(#)vmstat.c 8.1 (Berkeley) 6/6/93"; 39#endif /* not lint */ 40#endif 41 42#include <sys/cdefs.h> 43__FBSDID("$FreeBSD$"); 44 45#include <sys/param.h> 46#include <sys/proc.h> 47#include <sys/uio.h> 48#include <sys/namei.h> 49#include <sys/malloc.h> 50#include <sys/signal.h> 51#include <sys/fcntl.h> 52#include <sys/ioctl.h> 53#include <sys/resource.h> 54#include <sys/sysctl.h> 55#include <sys/time.h> 56#include <sys/vmmeter.h> 57#include <sys/pcpu.h> 58 59#include <vm/vm_param.h> 60 61#include <ctype.h> 62#include <devstat.h> 63#include <err.h> 64#include <errno.h> 65#include <inttypes.h> 66#include <kvm.h> 67#include <limits.h> 68#include <memstat.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#include <libutil.h> 78 79static char da[] = "da"; 80 81static struct nlist namelist[] = { 82#define X_SUM 0 83 { "_cnt" }, 84#define X_HZ 1 85 { "_hz" }, 86#define X_STATHZ 2 87 { "_stathz" }, 88#define X_NCHSTATS 3 89 { "_nchstats" }, 90#define X_INTRNAMES 4 91 { "_intrnames" }, 92#define X_SINTRNAMES 5 93 { "_sintrnames" }, 94#define X_INTRCNT 6 95 { "_intrcnt" }, 96#define X_SINTRCNT 7 97 { "_sintrcnt" }, 98#ifdef notyet 99#define X_DEFICIT XXX 100 { "_deficit" }, 101#define X_REC XXX 102 { "_rectime" }, 103#define X_PGIN XXX 104 { "_pgintime" }, 105#define X_XSTATS XXX 106 { "_xstats" }, 107#define X_END XXX 108#else 109#define X_END 8 110#endif 111 { "" }, 112}; 113 114static struct statinfo cur, last; 115static int num_devices, maxshowdevs; 116static long generation; 117static struct device_selection *dev_select; 118static int num_selected; 119static struct devstat_match *matches; 120static int num_matches = 0; 121static int num_devices_specified, num_selections; 122static long select_generation; 123static char **specified_devices; 124static devstat_select_mode select_mode; 125 126static struct vmmeter sum, osum; 127 128#define VMSTAT_DEFAULT_LINES 20 /* Default number of `winlines'. */ 129volatile sig_atomic_t wresized; /* Tty resized, when non-zero. */ 130static int winlines = VMSTAT_DEFAULT_LINES; /* Current number of tty rows. */ 131 132static int aflag; 133static int nflag; 134static int Pflag; 135static int hflag; 136 137static kvm_t *kd; 138 139#define FORKSTAT 0x01 140#define INTRSTAT 0x02 141#define MEMSTAT 0x04 142#define SUMSTAT 0x08 143#define TIMESTAT 0x10 144#define VMSTAT 0x20 145#define ZMEMSTAT 0x40 146 147static void cpustats(void); 148static void pcpustats(int, u_long, int); 149static void devstats(void); 150static void doforkst(void); 151static void dointr(void); 152static void dosum(void); 153static void dovmstat(unsigned int, int); 154static void domemstat_malloc(void); 155static void domemstat_zone(void); 156static void kread(int, void *, size_t); 157static void kreado(int, void *, size_t, size_t); 158static char *kgetstr(const char *); 159static void needhdr(int); 160static void needresize(int); 161static void doresize(void); 162static void printhdr(int, u_long); 163static void usage(void); 164 165static long pct(long, long); 166static long getuptime(void); 167 168static char **getdrivedata(char **); 169 170int 171main(int argc, char *argv[]) 172{ 173 int c, todo; 174 unsigned int interval; 175 float f; 176 int reps; 177 char *memf, *nlistf; 178 char errbuf[_POSIX2_LINE_MAX]; 179 180 memf = nlistf = NULL; 181 interval = reps = todo = 0; 182 maxshowdevs = 2; 183 hflag = isatty(1); 184 while ((c = getopt(argc, argv, "ac:fhHiM:mN:n:Pp:stw:z")) != -1) { 185 switch (c) { 186 case 'a': 187 aflag++; 188 break; 189 case 'c': 190 reps = atoi(optarg); 191 break; 192 case 'P': 193 Pflag++; 194 break; 195 case 'f': 196 todo |= FORKSTAT; 197 break; 198 case 'h': 199 hflag = 1; 200 break; 201 case 'H': 202 hflag = 0; 203 break; 204 case 'i': 205 todo |= INTRSTAT; 206 break; 207 case 'M': 208 memf = optarg; 209 break; 210 case 'm': 211 todo |= MEMSTAT; 212 break; 213 case 'N': 214 nlistf = optarg; 215 break; 216 case 'n': 217 nflag = 1; 218 maxshowdevs = atoi(optarg); 219 if (maxshowdevs < 0) 220 errx(1, "number of devices %d is < 0", 221 maxshowdevs); 222 break; 223 case 'p': 224 if (devstat_buildmatch(optarg, &matches, &num_matches) != 0) 225 errx(1, "%s", devstat_errbuf); 226 break; 227 case 's': 228 todo |= SUMSTAT; 229 break; 230 case 't': 231#ifdef notyet 232 todo |= TIMESTAT; 233#else 234 errx(EX_USAGE, "sorry, -t is not (re)implemented yet"); 235#endif 236 break; 237 case 'w': 238 /* Convert to milliseconds. */ 239 f = atof(optarg); 240 interval = f * 1000; 241 break; 242 case 'z': 243 todo |= ZMEMSTAT; 244 break; 245 case '?': 246 default: 247 usage(); 248 } 249 } 250 argc -= optind; 251 argv += optind; 252 253 if (todo == 0) 254 todo = VMSTAT; 255 256 if (memf != NULL) { 257 kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); 258 if (kd == NULL) 259 errx(1, "kvm_openfiles: %s", errbuf); 260 } 261 262 if (kd != NULL && (c = kvm_nlist(kd, namelist)) != 0) { 263 if (c > 0) { 264 warnx("undefined symbols:"); 265 for (c = 0; 266 c < (int)(sizeof(namelist)/sizeof(namelist[0])); 267 c++) 268 if (namelist[c].n_type == 0) 269 (void)fprintf(stderr, " %s", 270 namelist[c].n_name); 271 (void)fputc('\n', stderr); 272 } else 273 warnx("kvm_nlist: %s", kvm_geterr(kd)); 274 exit(1); 275 } 276 if (kd && Pflag) 277 errx(1, "Cannot use -P with crash dumps"); 278 279 if (todo & VMSTAT) { 280 /* 281 * Make sure that the userland devstat version matches the 282 * kernel devstat version. If not, exit and print a 283 * message informing the user of his mistake. 284 */ 285 if (devstat_checkversion(NULL) < 0) 286 errx(1, "%s", devstat_errbuf); 287 288 289 argv = getdrivedata(argv); 290 } 291 292#define BACKWARD_COMPATIBILITY 293#ifdef BACKWARD_COMPATIBILITY 294 if (*argv) { 295 f = atof(*argv); 296 interval = f * 1000; 297 if (*++argv) 298 reps = atoi(*argv); 299 } 300#endif 301 302 if (interval) { 303 if (!reps) 304 reps = -1; 305 } else if (reps) 306 interval = 1 * 1000; 307 308 if (todo & FORKSTAT) 309 doforkst(); 310 if (todo & MEMSTAT) 311 domemstat_malloc(); 312 if (todo & ZMEMSTAT) 313 domemstat_zone(); 314 if (todo & SUMSTAT) 315 dosum(); 316#ifdef notyet 317 if (todo & TIMESTAT) 318 dotimes(); 319#endif 320 if (todo & INTRSTAT) 321 dointr(); 322 if (todo & VMSTAT) 323 dovmstat(interval, reps); 324 exit(0); 325} 326 327static int 328mysysctl(const char *name, void *oldp, size_t *oldlenp, 329 void *newp, size_t newlen) 330{ 331 int error; 332 333 error = sysctlbyname(name, oldp, oldlenp, newp, newlen); 334 if (error != 0 && errno != ENOMEM) 335 err(1, "sysctl(%s)", name); 336 return (error); 337} 338 339static char ** 340getdrivedata(char **argv) 341{ 342 if ((num_devices = devstat_getnumdevs(NULL)) < 0) 343 errx(1, "%s", devstat_errbuf); 344 345 cur.dinfo = (struct devinfo *)calloc(1, sizeof(struct devinfo)); 346 last.dinfo = (struct devinfo *)calloc(1, sizeof(struct devinfo)); 347 348 if (devstat_getdevs(NULL, &cur) == -1) 349 errx(1, "%s", devstat_errbuf); 350 351 num_devices = cur.dinfo->numdevs; 352 generation = cur.dinfo->generation; 353 354 specified_devices = (char **)malloc(sizeof(char *)); 355 for (num_devices_specified = 0; *argv; ++argv) { 356 if (isdigit(**argv)) 357 break; 358 num_devices_specified++; 359 specified_devices = (char **)realloc(specified_devices, 360 sizeof(char *) * 361 num_devices_specified); 362 specified_devices[num_devices_specified - 1] = *argv; 363 } 364 dev_select = NULL; 365 366 if (nflag == 0 && maxshowdevs < num_devices_specified) 367 maxshowdevs = num_devices_specified; 368 369 /* 370 * People are generally only interested in disk statistics when 371 * they're running vmstat. So, that's what we're going to give 372 * them if they don't specify anything by default. We'll also give 373 * them any other random devices in the system so that we get to 374 * maxshowdevs devices, if that many devices exist. If the user 375 * specifies devices on the command line, either through a pattern 376 * match or by naming them explicitly, we will give the user only 377 * those devices. 378 */ 379 if ((num_devices_specified == 0) && (num_matches == 0)) { 380 if (devstat_buildmatch(da, &matches, &num_matches) != 0) 381 errx(1, "%s", devstat_errbuf); 382 383 select_mode = DS_SELECT_ADD; 384 } else 385 select_mode = DS_SELECT_ONLY; 386 387 /* 388 * At this point, selectdevs will almost surely indicate that the 389 * device list has changed, so we don't look for return values of 0 390 * or 1. If we get back -1, though, there is an error. 391 */ 392 if (devstat_selectdevs(&dev_select, &num_selected, &num_selections, 393 &select_generation, generation, cur.dinfo->devices, 394 num_devices, matches, num_matches, specified_devices, 395 num_devices_specified, select_mode, 396 maxshowdevs, 0) == -1) 397 errx(1, "%s", devstat_errbuf); 398 399 return(argv); 400} 401 402static long 403getuptime(void) 404{ 405 struct timespec sp; 406 407 (void)clock_gettime(CLOCK_MONOTONIC, &sp); 408 409 return(sp.tv_sec); 410} 411 412static void 413fill_pcpu(struct pcpu ***pcpup, int* maxcpup) 414{ 415 struct pcpu **pcpu; 416 417 int maxcpu, i; 418 419 *pcpup = NULL; 420 421 if (kd == NULL) 422 return; 423 424 maxcpu = kvm_getmaxcpu(kd); 425 if (maxcpu < 0) 426 errx(1, "kvm_getmaxcpu: %s", kvm_geterr(kd)); 427 428 pcpu = calloc(maxcpu, sizeof(struct pcpu *)); 429 if (pcpu == NULL) 430 err(1, "calloc"); 431 432 for (i = 0; i < maxcpu; i++) { 433 pcpu[i] = kvm_getpcpu(kd, i); 434 if (pcpu[i] == (struct pcpu *)-1) 435 errx(1, "kvm_getpcpu: %s", kvm_geterr(kd)); 436 } 437 438 *maxcpup = maxcpu; 439 *pcpup = pcpu; 440} 441 442static void 443free_pcpu(struct pcpu **pcpu, int maxcpu) 444{ 445 int i; 446 447 for (i = 0; i < maxcpu; i++) 448 free(pcpu[i]); 449 free(pcpu); 450} 451 452static void 453fill_vmmeter(struct vmmeter *vmmp) 454{ 455 struct pcpu **pcpu; 456 int maxcpu, i; 457 458 if (kd != NULL) { 459 kread(X_SUM, vmmp, sizeof(*vmmp)); 460 fill_pcpu(&pcpu, &maxcpu); 461 for (i = 0; i < maxcpu; i++) { 462 if (pcpu[i] == NULL) 463 continue; 464#define ADD_FROM_PCPU(i, name) \ 465 vmmp->name += pcpu[i]->pc_cnt.name 466 ADD_FROM_PCPU(i, v_swtch); 467 ADD_FROM_PCPU(i, v_trap); 468 ADD_FROM_PCPU(i, v_syscall); 469 ADD_FROM_PCPU(i, v_intr); 470 ADD_FROM_PCPU(i, v_soft); 471 ADD_FROM_PCPU(i, v_vm_faults); 472 ADD_FROM_PCPU(i, v_cow_faults); 473 ADD_FROM_PCPU(i, v_cow_optim); 474 ADD_FROM_PCPU(i, v_zfod); 475 ADD_FROM_PCPU(i, v_ozfod); 476 ADD_FROM_PCPU(i, v_swapin); 477 ADD_FROM_PCPU(i, v_swapout); 478 ADD_FROM_PCPU(i, v_swappgsin); 479 ADD_FROM_PCPU(i, v_swappgsout); 480 ADD_FROM_PCPU(i, v_vnodein); 481 ADD_FROM_PCPU(i, v_vnodeout); 482 ADD_FROM_PCPU(i, v_vnodepgsin); 483 ADD_FROM_PCPU(i, v_vnodepgsout); 484 ADD_FROM_PCPU(i, v_intrans); 485 ADD_FROM_PCPU(i, v_tfree); 486 ADD_FROM_PCPU(i, v_forks); 487 ADD_FROM_PCPU(i, v_vforks); 488 ADD_FROM_PCPU(i, v_rforks); 489 ADD_FROM_PCPU(i, v_kthreads); 490 ADD_FROM_PCPU(i, v_forkpages); 491 ADD_FROM_PCPU(i, v_vforkpages); 492 ADD_FROM_PCPU(i, v_rforkpages); 493 ADD_FROM_PCPU(i, v_kthreadpages); 494#undef ADD_FROM_PCPU 495 } 496 free_pcpu(pcpu, maxcpu); 497 } else { 498 size_t size = sizeof(unsigned int); 499#define GET_VM_STATS(cat, name) \ 500 mysysctl("vm.stats." #cat "." #name, &vmmp->name, &size, NULL, 0) 501 /* sys */ 502 GET_VM_STATS(sys, v_swtch); 503 GET_VM_STATS(sys, v_trap); 504 GET_VM_STATS(sys, v_syscall); 505 GET_VM_STATS(sys, v_intr); 506 GET_VM_STATS(sys, v_soft); 507 508 /* vm */ 509 GET_VM_STATS(vm, v_vm_faults); 510 GET_VM_STATS(vm, v_cow_faults); 511 GET_VM_STATS(vm, v_cow_optim); 512 GET_VM_STATS(vm, v_zfod); 513 GET_VM_STATS(vm, v_ozfod); 514 GET_VM_STATS(vm, v_swapin); 515 GET_VM_STATS(vm, v_swapout); 516 GET_VM_STATS(vm, v_swappgsin); 517 GET_VM_STATS(vm, v_swappgsout); 518 GET_VM_STATS(vm, v_vnodein); 519 GET_VM_STATS(vm, v_vnodeout); 520 GET_VM_STATS(vm, v_vnodepgsin); 521 GET_VM_STATS(vm, v_vnodepgsout); 522 GET_VM_STATS(vm, v_intrans); 523 GET_VM_STATS(vm, v_reactivated); 524 GET_VM_STATS(vm, v_pdwakeups); 525 GET_VM_STATS(vm, v_pdpages); 526 GET_VM_STATS(vm, v_tcached); 527 GET_VM_STATS(vm, v_dfree); 528 GET_VM_STATS(vm, v_pfree); 529 GET_VM_STATS(vm, v_tfree); 530 GET_VM_STATS(vm, v_page_size); 531 GET_VM_STATS(vm, v_page_count); 532 GET_VM_STATS(vm, v_free_reserved); 533 GET_VM_STATS(vm, v_free_target); 534 GET_VM_STATS(vm, v_free_min); 535 GET_VM_STATS(vm, v_free_count); 536 GET_VM_STATS(vm, v_wire_count); 537 GET_VM_STATS(vm, v_active_count); 538 GET_VM_STATS(vm, v_inactive_target); 539 GET_VM_STATS(vm, v_inactive_count); 540 GET_VM_STATS(vm, v_cache_count); 541 GET_VM_STATS(vm, v_cache_min); 542 GET_VM_STATS(vm, v_cache_max); 543 GET_VM_STATS(vm, v_pageout_free_min); 544 GET_VM_STATS(vm, v_interrupt_free_min); 545 /*GET_VM_STATS(vm, v_free_severe);*/ 546 GET_VM_STATS(vm, v_forks); 547 GET_VM_STATS(vm, v_vforks); 548 GET_VM_STATS(vm, v_rforks); 549 GET_VM_STATS(vm, v_kthreads); 550 GET_VM_STATS(vm, v_forkpages); 551 GET_VM_STATS(vm, v_vforkpages); 552 GET_VM_STATS(vm, v_rforkpages); 553 GET_VM_STATS(vm, v_kthreadpages); 554#undef GET_VM_STATS 555 } 556} 557 558static void 559fill_vmtotal(struct vmtotal *vmtp) 560{ 561 if (kd != NULL) { 562 /* XXX fill vmtp */ 563 errx(1, "not implemented"); 564 } else { 565 size_t size = sizeof(*vmtp); 566 mysysctl("vm.vmtotal", vmtp, &size, NULL, 0); 567 if (size != sizeof(*vmtp)) 568 errx(1, "vm.total size mismatch"); 569 } 570} 571 572/* Determine how many cpu columns, and what index they are in kern.cp_times */ 573static int 574getcpuinfo(u_long *maskp, int *maxidp) 575{ 576 int maxcpu; 577 int maxid; 578 int ncpus; 579 int i, j; 580 int empty; 581 size_t size; 582 long *times; 583 u_long mask; 584 585 if (kd != NULL) 586 errx(1, "not implemented"); 587 mask = 0; 588 ncpus = 0; 589 size = sizeof(maxcpu); 590 mysysctl("kern.smp.maxcpus", &maxcpu, &size, NULL, 0); 591 if (size != sizeof(maxcpu)) 592 errx(1, "sysctl kern.smp.maxcpus"); 593 size = sizeof(long) * maxcpu * CPUSTATES; 594 times = malloc(size); 595 if (times == NULL) 596 err(1, "malloc %zd bytes", size); 597 mysysctl("kern.cp_times", times, &size, NULL, 0); 598 maxid = (size / CPUSTATES / sizeof(long)) - 1; 599 for (i = 0; i <= maxid; i++) { 600 empty = 1; 601 for (j = 0; empty && j < CPUSTATES; j++) { 602 if (times[i * CPUSTATES + j] != 0) 603 empty = 0; 604 } 605 if (!empty) { 606 mask |= (1ul << i); 607 ncpus++; 608 } 609 } 610 if (maskp) 611 *maskp = mask; 612 if (maxidp) 613 *maxidp = maxid; 614 return (ncpus); 615} 616 617 618static void 619prthuman(u_int64_t val, int size) 620{ 621 char buf[10]; 622 int flags; 623 624 if (size < 5 || size > 9) 625 errx(1, "doofus"); 626 flags = HN_B | HN_NOSPACE | HN_DECIMAL; 627 humanize_number(buf, size, val, "", HN_AUTOSCALE, flags); 628 printf("%*s", size, buf); 629} 630 631static int hz, hdrcnt; 632 633static long *cur_cp_times; 634static long *last_cp_times; 635static size_t size_cp_times; 636 637static void 638dovmstat(unsigned int interval, int reps) 639{ 640 struct vmtotal total; 641 time_t uptime, halfuptime; 642 struct devinfo *tmp_dinfo; 643 size_t size; 644 int ncpus, maxid; 645 u_long cpumask; 646 int rate_adj; 647 648 uptime = getuptime(); 649 halfuptime = uptime / 2; 650 rate_adj = 1; 651 652 /* 653 * If the user stops the program (control-Z) and then resumes it, 654 * print out the header again. 655 */ 656 (void)signal(SIGCONT, needhdr); 657 658 /* 659 * If our standard output is a tty, then install a SIGWINCH handler 660 * and set wresized so that our first iteration through the main 661 * vmstat loop will peek at the terminal's current rows to find out 662 * how many lines can fit in a screenful of output. 663 */ 664 if (isatty(fileno(stdout)) != 0) { 665 wresized = 1; 666 (void)signal(SIGWINCH, needresize); 667 } else { 668 wresized = 0; 669 winlines = VMSTAT_DEFAULT_LINES; 670 } 671 672 if (kd != NULL) { 673 if (namelist[X_STATHZ].n_type != 0 && 674 namelist[X_STATHZ].n_value != 0) 675 kread(X_STATHZ, &hz, sizeof(hz)); 676 if (!hz) 677 kread(X_HZ, &hz, sizeof(hz)); 678 } else { 679 struct clockinfo clockrate; 680 681 size = sizeof(clockrate); 682 mysysctl("kern.clockrate", &clockrate, &size, NULL, 0); 683 if (size != sizeof(clockrate)) 684 errx(1, "clockrate size mismatch"); 685 hz = clockrate.hz; 686 } 687 688 if (Pflag) { 689 ncpus = getcpuinfo(&cpumask, &maxid); 690 size_cp_times = sizeof(long) * (maxid + 1) * CPUSTATES; 691 cur_cp_times = calloc(1, size_cp_times); 692 last_cp_times = calloc(1, size_cp_times); 693 } 694 for (hdrcnt = 1;;) { 695 if (!--hdrcnt) 696 printhdr(ncpus, cpumask); 697 if (kd != NULL) { 698 if (kvm_getcptime(kd, cur.cp_time) < 0) 699 errx(1, "kvm_getcptime: %s", kvm_geterr(kd)); 700 } else { 701 size = sizeof(cur.cp_time); 702 mysysctl("kern.cp_time", &cur.cp_time, &size, NULL, 0); 703 if (size != sizeof(cur.cp_time)) 704 errx(1, "cp_time size mismatch"); 705 } 706 if (Pflag) { 707 size = size_cp_times; 708 mysysctl("kern.cp_times", cur_cp_times, &size, NULL, 0); 709 if (size != size_cp_times) 710 errx(1, "cp_times mismatch"); 711 } 712 713 tmp_dinfo = last.dinfo; 714 last.dinfo = cur.dinfo; 715 cur.dinfo = tmp_dinfo; 716 last.snap_time = cur.snap_time; 717 718 /* 719 * Here what we want to do is refresh our device stats. 720 * getdevs() returns 1 when the device list has changed. 721 * If the device list has changed, we want to go through 722 * the selection process again, in case a device that we 723 * were previously displaying has gone away. 724 */ 725 switch (devstat_getdevs(NULL, &cur)) { 726 case -1: 727 errx(1, "%s", devstat_errbuf); 728 break; 729 case 1: { 730 int retval; 731 732 num_devices = cur.dinfo->numdevs; 733 generation = cur.dinfo->generation; 734 735 retval = devstat_selectdevs(&dev_select, &num_selected, 736 &num_selections, &select_generation, 737 generation, cur.dinfo->devices, 738 num_devices, matches, num_matches, 739 specified_devices, 740 num_devices_specified, select_mode, 741 maxshowdevs, 0); 742 switch (retval) { 743 case -1: 744 errx(1, "%s", devstat_errbuf); 745 break; 746 case 1: 747 printhdr(ncpus, cpumask); 748 break; 749 default: 750 break; 751 } 752 } 753 default: 754 break; 755 } 756 757 fill_vmmeter(&sum); 758 fill_vmtotal(&total); 759 (void)printf("%2d %1d %1d", 760 total.t_rq - 1, total.t_dw + total.t_pw, total.t_sw); 761#define vmstat_pgtok(a) ((a) * (sum.v_page_size >> 10)) 762#define rate(x) (((x) * rate_adj + halfuptime) / uptime) /* round */ 763 if (hflag) { 764 printf(" "); 765 prthuman(total.t_avm * (u_int64_t)sum.v_page_size, 7); 766 printf(" "); 767 prthuman(total.t_free * (u_int64_t)sum.v_page_size, 6); 768 printf(" "); 769 } else { 770 printf(" %7d ", vmstat_pgtok(total.t_avm)); 771 printf(" %6d ", vmstat_pgtok(total.t_free)); 772 } 773 (void)printf("%5lu ", 774 (unsigned long)rate(sum.v_vm_faults - osum.v_vm_faults)); 775 (void)printf("%3lu ", 776 (unsigned long)rate(sum.v_reactivated - osum.v_reactivated)); 777 (void)printf("%3lu ", 778 (unsigned long)rate(sum.v_swapin + sum.v_vnodein - 779 (osum.v_swapin + osum.v_vnodein))); 780 (void)printf("%3lu ", 781 (unsigned long)rate(sum.v_swapout + sum.v_vnodeout - 782 (osum.v_swapout + osum.v_vnodeout))); 783 (void)printf("%5lu ", 784 (unsigned long)rate(sum.v_tfree - osum.v_tfree)); 785 (void)printf("%3lu ", 786 (unsigned long)rate(sum.v_pdpages - osum.v_pdpages)); 787 devstats(); 788 (void)printf("%4lu %4lu %4lu", 789 (unsigned long)rate(sum.v_intr - osum.v_intr), 790 (unsigned long)rate(sum.v_syscall - osum.v_syscall), 791 (unsigned long)rate(sum.v_swtch - osum.v_swtch)); 792 if (Pflag) 793 pcpustats(ncpus, cpumask, maxid); 794 else 795 cpustats(); 796 (void)printf("\n"); 797 (void)fflush(stdout); 798 if (reps >= 0 && --reps <= 0) 799 break; 800 osum = sum; 801 uptime = interval; 802 rate_adj = 1000; 803 /* 804 * We round upward to avoid losing low-frequency events 805 * (i.e., >= 1 per interval but < 1 per millisecond). 806 */ 807 if (interval != 1) 808 halfuptime = (uptime + 1) / 2; 809 else 810 halfuptime = 0; 811 (void)usleep(interval * 1000); 812 } 813} 814 815static void 816printhdr(int ncpus, u_long cpumask) 817{ 818 int i, num_shown; 819 820 num_shown = (num_selected < maxshowdevs) ? num_selected : maxshowdevs; 821 (void)printf(" procs memory page%*s", 19, ""); 822 if (num_shown > 1) 823 (void)printf(" disks %*s", num_shown * 4 - 7, ""); 824 else if (num_shown == 1) 825 (void)printf("disk"); 826 (void)printf(" faults "); 827 if (Pflag) { 828 for (i = 0; i < ncpus; i++) { 829 if (cpumask & (1ul << i)) 830 printf("cpu%-2d ", i); 831 } 832 printf("\n"); 833 } else 834 printf("cpu\n"); 835 (void)printf(" r b w avm fre flt re pi po fr sr "); 836 for (i = 0; i < num_devices; i++) 837 if ((dev_select[i].selected) 838 && (dev_select[i].selected <= maxshowdevs)) 839 (void)printf("%c%c%d ", dev_select[i].device_name[0], 840 dev_select[i].device_name[1], 841 dev_select[i].unit_number); 842 (void)printf(" in sy cs"); 843 if (Pflag) { 844 for (i = 0; i < ncpus; i++) 845 printf(" us sy id"); 846 printf("\n"); 847 } else 848 printf(" us sy id\n"); 849 if (wresized != 0) 850 doresize(); 851 hdrcnt = winlines; 852} 853 854/* 855 * Force a header to be prepended to the next output. 856 */ 857static void 858needhdr(int dummy __unused) 859{ 860 861 hdrcnt = 1; 862} 863 864/* 865 * When the terminal is resized, force an update of the maximum number of rows 866 * printed between each header repetition. Then force a new header to be 867 * prepended to the next output. 868 */ 869void 870needresize(int signo) 871{ 872 873 wresized = 1; 874 hdrcnt = 1; 875} 876 877/* 878 * Update the global `winlines' count of terminal rows. 879 */ 880void 881doresize(void) 882{ 883 int status; 884 struct winsize w; 885 886 for (;;) { 887 status = ioctl(fileno(stdout), TIOCGWINSZ, &w); 888 if (status == -1 && errno == EINTR) 889 continue; 890 else if (status == -1) 891 err(1, "ioctl"); 892 if (w.ws_row > 3) 893 winlines = w.ws_row - 3; 894 else 895 winlines = VMSTAT_DEFAULT_LINES; 896 break; 897 } 898 899 /* 900 * Inhibit doresize() calls until we are rescheduled by SIGWINCH. 901 */ 902 wresized = 0; 903} 904 905#ifdef notyet 906static void 907dotimes(void) 908{ 909 unsigned int pgintime, rectime; 910 911 kread(X_REC, &rectime, sizeof(rectime)); 912 kread(X_PGIN, &pgintime, sizeof(pgintime)); 913 kread(X_SUM, &sum, sizeof(sum)); 914 (void)printf("%u reclaims, %u total time (usec)\n", 915 sum.v_pgrec, rectime); 916 (void)printf("average: %u usec / reclaim\n", rectime / sum.v_pgrec); 917 (void)printf("\n"); 918 (void)printf("%u page ins, %u total time (msec)\n", 919 sum.v_pgin, pgintime / 10); 920 (void)printf("average: %8.1f msec / page in\n", 921 pgintime / (sum.v_pgin * 10.0)); 922} 923#endif 924 925static long 926pct(long top, long bot) 927{ 928 long ans; 929 930 if (bot == 0) 931 return(0); 932 ans = (quad_t)top * 100 / bot; 933 return (ans); 934} 935 936#define PCT(top, bot) pct((long)(top), (long)(bot)) 937 938static void 939dosum(void) 940{ 941 struct nchstats lnchstats; 942 long nchtotal; 943 944 fill_vmmeter(&sum); 945 (void)printf("%9u cpu context switches\n", sum.v_swtch); 946 (void)printf("%9u device interrupts\n", sum.v_intr); 947 (void)printf("%9u software interrupts\n", sum.v_soft); 948 (void)printf("%9u traps\n", sum.v_trap); 949 (void)printf("%9u system calls\n", sum.v_syscall); 950 (void)printf("%9u kernel threads created\n", sum.v_kthreads); 951 (void)printf("%9u fork() calls\n", sum.v_forks); 952 (void)printf("%9u vfork() calls\n", sum.v_vforks); 953 (void)printf("%9u rfork() calls\n", sum.v_rforks); 954 (void)printf("%9u swap pager pageins\n", sum.v_swapin); 955 (void)printf("%9u swap pager pages paged in\n", sum.v_swappgsin); 956 (void)printf("%9u swap pager pageouts\n", sum.v_swapout); 957 (void)printf("%9u swap pager pages paged out\n", sum.v_swappgsout); 958 (void)printf("%9u vnode pager pageins\n", sum.v_vnodein); 959 (void)printf("%9u vnode pager pages paged in\n", sum.v_vnodepgsin); 960 (void)printf("%9u vnode pager pageouts\n", sum.v_vnodeout); 961 (void)printf("%9u vnode pager pages paged out\n", sum.v_vnodepgsout); 962 (void)printf("%9u page daemon wakeups\n", sum.v_pdwakeups); 963 (void)printf("%9u pages examined by the page daemon\n", sum.v_pdpages); 964 (void)printf("%9u pages reactivated\n", sum.v_reactivated); 965 (void)printf("%9u copy-on-write faults\n", sum.v_cow_faults); 966 (void)printf("%9u copy-on-write optimized faults\n", sum.v_cow_optim); 967 (void)printf("%9u zero fill pages zeroed\n", sum.v_zfod); 968 (void)printf("%9u zero fill pages prezeroed\n", sum.v_ozfod); 969 (void)printf("%9u intransit blocking page faults\n", sum.v_intrans); 970 (void)printf("%9u total VM faults taken\n", sum.v_vm_faults); 971 (void)printf("%9u pages affected by kernel thread creation\n", sum.v_kthreadpages); 972 (void)printf("%9u pages affected by fork()\n", sum.v_forkpages); 973 (void)printf("%9u pages affected by vfork()\n", sum.v_vforkpages); 974 (void)printf("%9u pages affected by rfork()\n", sum.v_rforkpages); 975 (void)printf("%9u pages cached\n", sum.v_tcached); 976 (void)printf("%9u pages freed\n", sum.v_tfree); 977 (void)printf("%9u pages freed by daemon\n", sum.v_dfree); 978 (void)printf("%9u pages freed by exiting processes\n", sum.v_pfree); 979 (void)printf("%9u pages active\n", sum.v_active_count); 980 (void)printf("%9u pages inactive\n", sum.v_inactive_count); 981 (void)printf("%9u pages in VM cache\n", sum.v_cache_count); 982 (void)printf("%9u pages wired down\n", sum.v_wire_count); 983 (void)printf("%9u pages free\n", sum.v_free_count); 984 (void)printf("%9u bytes per page\n", sum.v_page_size); 985 if (kd != NULL) { 986 kread(X_NCHSTATS, &lnchstats, sizeof(lnchstats)); 987 } else { 988 size_t size = sizeof(lnchstats); 989 mysysctl("vfs.cache.nchstats", &lnchstats, &size, NULL, 0); 990 if (size != sizeof(lnchstats)) 991 errx(1, "vfs.cache.nchstats size mismatch"); 992 } 993 nchtotal = lnchstats.ncs_goodhits + lnchstats.ncs_neghits + 994 lnchstats.ncs_badhits + lnchstats.ncs_falsehits + 995 lnchstats.ncs_miss + lnchstats.ncs_long; 996 (void)printf("%9ld total name lookups\n", nchtotal); 997 (void)printf( 998 "%9s cache hits (%ld%% pos + %ld%% neg) system %ld%% per-directory\n", 999 "", PCT(lnchstats.ncs_goodhits, nchtotal), 1000 PCT(lnchstats.ncs_neghits, nchtotal), 1001 PCT(lnchstats.ncs_pass2, nchtotal)); 1002 (void)printf("%9s deletions %ld%%, falsehits %ld%%, toolong %ld%%\n", "", 1003 PCT(lnchstats.ncs_badhits, nchtotal), 1004 PCT(lnchstats.ncs_falsehits, nchtotal), 1005 PCT(lnchstats.ncs_long, nchtotal)); 1006} 1007 1008static void 1009doforkst(void) 1010{ 1011 fill_vmmeter(&sum); 1012 (void)printf("%u forks, %u pages, average %.2f\n", 1013 sum.v_forks, sum.v_forkpages, 1014 sum.v_forks == 0 ? 0.0 : 1015 (double)sum.v_forkpages / sum.v_forks); 1016 (void)printf("%u vforks, %u pages, average %.2f\n", 1017 sum.v_vforks, sum.v_vforkpages, 1018 sum.v_vforks == 0 ? 0.0 : 1019 (double)sum.v_vforkpages / sum.v_vforks); 1020 (void)printf("%u rforks, %u pages, average %.2f\n", 1021 sum.v_rforks, sum.v_rforkpages, 1022 sum.v_rforks == 0 ? 0.0 : 1023 (double)sum.v_rforkpages / sum.v_rforks); 1024} 1025 1026static void 1027devstats(void) 1028{ 1029 int dn, state; 1030 long double transfers_per_second; 1031 long double busy_seconds; 1032 long tmp; 1033 1034 for (state = 0; state < CPUSTATES; ++state) { 1035 tmp = cur.cp_time[state]; 1036 cur.cp_time[state] -= last.cp_time[state]; 1037 last.cp_time[state] = tmp; 1038 } 1039 1040 busy_seconds = cur.snap_time - last.snap_time; 1041 1042 for (dn = 0; dn < num_devices; dn++) { 1043 int di; 1044 1045 if ((dev_select[dn].selected == 0) 1046 || (dev_select[dn].selected > maxshowdevs)) 1047 continue; 1048 1049 di = dev_select[dn].position; 1050 1051 if (devstat_compute_statistics(&cur.dinfo->devices[di], 1052 &last.dinfo->devices[di], busy_seconds, 1053 DSM_TRANSFERS_PER_SECOND, &transfers_per_second, 1054 DSM_NONE) != 0) 1055 errx(1, "%s", devstat_errbuf); 1056 1057 (void)printf("%3.0Lf ", transfers_per_second); 1058 } 1059} 1060 1061static void 1062percent(double pct, int *over) 1063{ 1064 char buf[10]; 1065 int l; 1066 1067 l = snprintf(buf, sizeof(buf), "%.0f", pct); 1068 if (l == 1 && *over) { 1069 printf("%s", buf); 1070 (*over)--; 1071 } else 1072 printf("%2s", buf); 1073 if (l > 2) 1074 (*over)++; 1075} 1076 1077static void 1078cpustats(void) 1079{ 1080 int state, over; 1081 double lpct, total; 1082 1083 total = 0; 1084 for (state = 0; state < CPUSTATES; ++state) 1085 total += cur.cp_time[state]; 1086 if (total) 1087 lpct = 100.0 / total; 1088 else 1089 lpct = 0.0; 1090 over = 0; 1091 printf(" "); 1092 percent((cur.cp_time[CP_USER] + cur.cp_time[CP_NICE]) * lpct, &over); 1093 printf(" "); 1094 percent((cur.cp_time[CP_SYS] + cur.cp_time[CP_INTR]) * lpct, &over); 1095 printf(" "); 1096 percent(cur.cp_time[CP_IDLE] * lpct, &over); 1097} 1098 1099static void 1100pcpustats(int ncpus, u_long cpumask, int maxid) 1101{ 1102 int state, i; 1103 double lpct, total; 1104 long tmp; 1105 int over; 1106 1107 /* devstats does this for cp_time */ 1108 for (i = 0; i <= maxid; i++) { 1109 if ((cpumask & (1ul << i)) == 0) 1110 continue; 1111 for (state = 0; state < CPUSTATES; ++state) { 1112 tmp = cur_cp_times[i * CPUSTATES + state]; 1113 cur_cp_times[i * CPUSTATES + state] -= last_cp_times[i * CPUSTATES + state]; 1114 last_cp_times[i * CPUSTATES + state] = tmp; 1115 } 1116 } 1117 1118 over = 0; 1119 for (i = 0; i <= maxid; i++) { 1120 if ((cpumask & (1ul << i)) == 0) 1121 continue; 1122 total = 0; 1123 for (state = 0; state < CPUSTATES; ++state) 1124 total += cur_cp_times[i * CPUSTATES + state]; 1125 if (total) 1126 lpct = 100.0 / total; 1127 else 1128 lpct = 0.0; 1129 printf(" "); 1130 percent((cur_cp_times[i * CPUSTATES + CP_USER] + 1131 cur_cp_times[i * CPUSTATES + CP_NICE]) * lpct, &over); 1132 printf(" "); 1133 percent((cur_cp_times[i * CPUSTATES + CP_SYS] + 1134 cur_cp_times[i * CPUSTATES + CP_INTR]) * lpct, &over); 1135 printf(" "); 1136 percent(cur_cp_times[i * CPUSTATES + CP_IDLE] * lpct, &over); 1137 } 1138} 1139 1140static void 1141dointr(void) 1142{ 1143 unsigned long *intrcnt, uptime; 1144 uint64_t inttotal; 1145 size_t clen, inamlen, intrcntlen, istrnamlen; 1146 unsigned int i, nintr; 1147 char *intrname, *tintrname; 1148 1149 uptime = getuptime(); 1150 if (kd != NULL) { 1151 kread(X_SINTRCNT, &intrcntlen, sizeof(intrcntlen)); 1152 kread(X_SINTRNAMES, &inamlen, sizeof(inamlen)); 1153 if ((intrcnt = malloc(intrcntlen)) == NULL || 1154 (intrname = malloc(inamlen)) == NULL) 1155 err(1, "malloc()"); 1156 kread(X_INTRCNT, intrcnt, intrcntlen); 1157 kread(X_INTRNAMES, intrname, inamlen); 1158 } else { 1159 for (intrcnt = NULL, intrcntlen = 1024; ; intrcntlen *= 2) { 1160 if ((intrcnt = reallocf(intrcnt, intrcntlen)) == NULL) 1161 err(1, "reallocf()"); 1162 if (mysysctl("hw.intrcnt", 1163 intrcnt, &intrcntlen, NULL, 0) == 0) 1164 break; 1165 } 1166 for (intrname = NULL, inamlen = 1024; ; inamlen *= 2) { 1167 if ((intrname = reallocf(intrname, inamlen)) == NULL) 1168 err(1, "reallocf()"); 1169 if (mysysctl("hw.intrnames", 1170 intrname, &inamlen, NULL, 0) == 0) 1171 break; 1172 } 1173 } 1174 nintr = intrcntlen / sizeof(unsigned long); 1175 tintrname = intrname; 1176 istrnamlen = strlen("interrupt"); 1177 for (i = 0; i < nintr; i++) { 1178 clen = strlen(tintrname); 1179 if (clen > istrnamlen) 1180 istrnamlen = clen; 1181 tintrname += clen + 1; 1182 } 1183 (void)printf("%-*s %20s %10s\n", (int)istrnamlen, "interrupt", "total", 1184 "rate"); 1185 inttotal = 0; 1186 for (i = 0; i < nintr; i++) { 1187 if (intrname[0] != '\0' && (*intrcnt != 0 || aflag)) 1188 (void)printf("%-*s %20lu %10lu\n", (int)istrnamlen, 1189 intrname, *intrcnt, *intrcnt / uptime); 1190 intrname += strlen(intrname) + 1; 1191 inttotal += *intrcnt++; 1192 } 1193 (void)printf("%-*s %20" PRIu64 " %10" PRIu64 "\n", (int)istrnamlen, 1194 "Total", inttotal, inttotal / uptime); 1195} 1196 1197static void 1198domemstat_malloc(void) 1199{ 1200 struct memory_type_list *mtlp; 1201 struct memory_type *mtp; 1202 int error, first, i; 1203 1204 mtlp = memstat_mtl_alloc(); 1205 if (mtlp == NULL) { 1206 warn("memstat_mtl_alloc"); 1207 return; 1208 } 1209 if (kd == NULL) { 1210 if (memstat_sysctl_malloc(mtlp, 0) < 0) { 1211 warnx("memstat_sysctl_malloc: %s", 1212 memstat_strerror(memstat_mtl_geterror(mtlp))); 1213 return; 1214 } 1215 } else { 1216 if (memstat_kvm_malloc(mtlp, kd) < 0) { 1217 error = memstat_mtl_geterror(mtlp); 1218 if (error == MEMSTAT_ERROR_KVM) 1219 warnx("memstat_kvm_malloc: %s", 1220 kvm_geterr(kd)); 1221 else 1222 warnx("memstat_kvm_malloc: %s", 1223 memstat_strerror(error)); 1224 } 1225 } 1226 printf("%13s %5s %6s %7s %8s Size(s)\n", "Type", "InUse", "MemUse", 1227 "HighUse", "Requests"); 1228 for (mtp = memstat_mtl_first(mtlp); mtp != NULL; 1229 mtp = memstat_mtl_next(mtp)) { 1230 if (memstat_get_numallocs(mtp) == 0 && 1231 memstat_get_count(mtp) == 0) 1232 continue; 1233 printf("%13s %5" PRIu64 " %5" PRIu64 "K %7s %8" PRIu64 " ", 1234 memstat_get_name(mtp), memstat_get_count(mtp), 1235 (memstat_get_bytes(mtp) + 1023) / 1024, "-", 1236 memstat_get_numallocs(mtp)); 1237 first = 1; 1238 for (i = 0; i < 32; i++) { 1239 if (memstat_get_sizemask(mtp) & (1 << i)) { 1240 if (!first) 1241 printf(","); 1242 printf("%d", 1 << (i + 4)); 1243 first = 0; 1244 } 1245 } 1246 printf("\n"); 1247 } 1248 memstat_mtl_free(mtlp); 1249} 1250 1251static void 1252domemstat_zone(void) 1253{ 1254 struct memory_type_list *mtlp; 1255 struct memory_type *mtp; 1256 char name[MEMTYPE_MAXNAME + 1]; 1257 int error; 1258 1259 mtlp = memstat_mtl_alloc(); 1260 if (mtlp == NULL) { 1261 warn("memstat_mtl_alloc"); 1262 return; 1263 } 1264 if (kd == NULL) { 1265 if (memstat_sysctl_uma(mtlp, 0) < 0) { 1266 warnx("memstat_sysctl_uma: %s", 1267 memstat_strerror(memstat_mtl_geterror(mtlp))); 1268 return; 1269 } 1270 } else { 1271 if (memstat_kvm_uma(mtlp, kd) < 0) { 1272 error = memstat_mtl_geterror(mtlp); 1273 if (error == MEMSTAT_ERROR_KVM) 1274 warnx("memstat_kvm_uma: %s", 1275 kvm_geterr(kd)); 1276 else 1277 warnx("memstat_kvm_uma: %s", 1278 memstat_strerror(error)); 1279 } 1280 } 1281 printf("%-20s %6s %6s %8s %8s %8s %4s %4s\n\n", "ITEM", "SIZE", 1282 "LIMIT", "USED", "FREE", "REQ", "FAIL", "SLEEP"); 1283 for (mtp = memstat_mtl_first(mtlp); mtp != NULL; 1284 mtp = memstat_mtl_next(mtp)) { 1285 strlcpy(name, memstat_get_name(mtp), MEMTYPE_MAXNAME); 1286 strcat(name, ":"); 1287 printf("%-20s %6" PRIu64 ", %6" PRIu64 ",%8" PRIu64 ",%8" PRIu64 1288 ",%8" PRIu64 ",%4" PRIu64 ",%4" PRIu64 "\n", name, 1289 memstat_get_size(mtp), memstat_get_countlimit(mtp), 1290 memstat_get_count(mtp), memstat_get_free(mtp), 1291 memstat_get_numallocs(mtp), memstat_get_failures(mtp), 1292 memstat_get_sleeps(mtp)); 1293 } 1294 memstat_mtl_free(mtlp); 1295 printf("\n"); 1296} 1297 1298/* 1299 * kread reads something from the kernel, given its nlist index. 1300 */ 1301static void 1302kreado(int nlx, void *addr, size_t size, size_t offset) 1303{ 1304 const char *sym; 1305 1306 if (namelist[nlx].n_type == 0 || namelist[nlx].n_value == 0) { 1307 sym = namelist[nlx].n_name; 1308 if (*sym == '_') 1309 ++sym; 1310 errx(1, "symbol %s not defined", sym); 1311 } 1312 if ((size_t)kvm_read(kd, namelist[nlx].n_value + offset, addr, 1313 size) != size) { 1314 sym = namelist[nlx].n_name; 1315 if (*sym == '_') 1316 ++sym; 1317 errx(1, "%s: %s", sym, kvm_geterr(kd)); 1318 } 1319} 1320 1321static void 1322kread(int nlx, void *addr, size_t size) 1323{ 1324 kreado(nlx, addr, size, 0); 1325} 1326 1327static char * 1328kgetstr(const char *strp) 1329{ 1330 int n = 0, size = 1; 1331 char *ret = NULL; 1332 1333 do { 1334 if (size == n + 1) { 1335 ret = realloc(ret, size); 1336 if (ret == NULL) 1337 err(1, "%s: realloc", __func__); 1338 size *= 2; 1339 } 1340 if (kvm_read(kd, (u_long)strp + n, &ret[n], 1) != 1) 1341 errx(1, "%s: %s", __func__, kvm_geterr(kd)); 1342 } while (ret[n++] != '\0'); 1343 return (ret); 1344} 1345 1346static void 1347usage(void) 1348{ 1349 (void)fprintf(stderr, "%s%s", 1350 "usage: vmstat [-afHhimPsz] [-c count] [-M core [-N system]] [-w wait]\n", 1351 " [-n devs] [-p type,if,pass] [disks]\n"); 1352 exit(1); 1353} 1354