vmstat.c revision 273188
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: releng/10.1/usr.bin/vmstat/vmstat.c 273188 2014-10-16 22:00:24Z hrs $"); 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_io_faults); 473 ADD_FROM_PCPU(i, v_cow_faults); 474 ADD_FROM_PCPU(i, v_cow_optim); 475 ADD_FROM_PCPU(i, v_zfod); 476 ADD_FROM_PCPU(i, v_ozfod); 477 ADD_FROM_PCPU(i, v_swapin); 478 ADD_FROM_PCPU(i, v_swapout); 479 ADD_FROM_PCPU(i, v_swappgsin); 480 ADD_FROM_PCPU(i, v_swappgsout); 481 ADD_FROM_PCPU(i, v_vnodein); 482 ADD_FROM_PCPU(i, v_vnodeout); 483 ADD_FROM_PCPU(i, v_vnodepgsin); 484 ADD_FROM_PCPU(i, v_vnodepgsout); 485 ADD_FROM_PCPU(i, v_intrans); 486 ADD_FROM_PCPU(i, v_tfree); 487 ADD_FROM_PCPU(i, v_forks); 488 ADD_FROM_PCPU(i, v_vforks); 489 ADD_FROM_PCPU(i, v_rforks); 490 ADD_FROM_PCPU(i, v_kthreads); 491 ADD_FROM_PCPU(i, v_forkpages); 492 ADD_FROM_PCPU(i, v_vforkpages); 493 ADD_FROM_PCPU(i, v_rforkpages); 494 ADD_FROM_PCPU(i, v_kthreadpages); 495#undef ADD_FROM_PCPU 496 } 497 free_pcpu(pcpu, maxcpu); 498 } else { 499 size_t size = sizeof(unsigned int); 500#define GET_VM_STATS(cat, name) \ 501 mysysctl("vm.stats." #cat "." #name, &vmmp->name, &size, NULL, 0) 502 /* sys */ 503 GET_VM_STATS(sys, v_swtch); 504 GET_VM_STATS(sys, v_trap); 505 GET_VM_STATS(sys, v_syscall); 506 GET_VM_STATS(sys, v_intr); 507 GET_VM_STATS(sys, v_soft); 508 509 /* vm */ 510 GET_VM_STATS(vm, v_vm_faults); 511 GET_VM_STATS(vm, v_io_faults); 512 GET_VM_STATS(vm, v_cow_faults); 513 GET_VM_STATS(vm, v_cow_optim); 514 GET_VM_STATS(vm, v_zfod); 515 GET_VM_STATS(vm, v_ozfod); 516 GET_VM_STATS(vm, v_swapin); 517 GET_VM_STATS(vm, v_swapout); 518 GET_VM_STATS(vm, v_swappgsin); 519 GET_VM_STATS(vm, v_swappgsout); 520 GET_VM_STATS(vm, v_vnodein); 521 GET_VM_STATS(vm, v_vnodeout); 522 GET_VM_STATS(vm, v_vnodepgsin); 523 GET_VM_STATS(vm, v_vnodepgsout); 524 GET_VM_STATS(vm, v_intrans); 525 GET_VM_STATS(vm, v_reactivated); 526 GET_VM_STATS(vm, v_pdwakeups); 527 GET_VM_STATS(vm, v_pdpages); 528 GET_VM_STATS(vm, v_tcached); 529 GET_VM_STATS(vm, v_dfree); 530 GET_VM_STATS(vm, v_pfree); 531 GET_VM_STATS(vm, v_tfree); 532 GET_VM_STATS(vm, v_page_size); 533 GET_VM_STATS(vm, v_page_count); 534 GET_VM_STATS(vm, v_free_reserved); 535 GET_VM_STATS(vm, v_free_target); 536 GET_VM_STATS(vm, v_free_min); 537 GET_VM_STATS(vm, v_free_count); 538 GET_VM_STATS(vm, v_wire_count); 539 GET_VM_STATS(vm, v_active_count); 540 GET_VM_STATS(vm, v_inactive_target); 541 GET_VM_STATS(vm, v_inactive_count); 542 GET_VM_STATS(vm, v_cache_count); 543 GET_VM_STATS(vm, v_cache_min); 544 GET_VM_STATS(vm, v_cache_max); 545 GET_VM_STATS(vm, v_pageout_free_min); 546 GET_VM_STATS(vm, v_interrupt_free_min); 547 /*GET_VM_STATS(vm, v_free_severe);*/ 548 GET_VM_STATS(vm, v_forks); 549 GET_VM_STATS(vm, v_vforks); 550 GET_VM_STATS(vm, v_rforks); 551 GET_VM_STATS(vm, v_kthreads); 552 GET_VM_STATS(vm, v_forkpages); 553 GET_VM_STATS(vm, v_vforkpages); 554 GET_VM_STATS(vm, v_rforkpages); 555 GET_VM_STATS(vm, v_kthreadpages); 556#undef GET_VM_STATS 557 } 558} 559 560static void 561fill_vmtotal(struct vmtotal *vmtp) 562{ 563 if (kd != NULL) { 564 /* XXX fill vmtp */ 565 errx(1, "not implemented"); 566 } else { 567 size_t size = sizeof(*vmtp); 568 mysysctl("vm.vmtotal", vmtp, &size, NULL, 0); 569 if (size != sizeof(*vmtp)) 570 errx(1, "vm.total size mismatch"); 571 } 572} 573 574/* Determine how many cpu columns, and what index they are in kern.cp_times */ 575static int 576getcpuinfo(u_long *maskp, int *maxidp) 577{ 578 int maxcpu; 579 int maxid; 580 int ncpus; 581 int i, j; 582 int empty; 583 size_t size; 584 long *times; 585 u_long mask; 586 587 if (kd != NULL) 588 errx(1, "not implemented"); 589 mask = 0; 590 ncpus = 0; 591 size = sizeof(maxcpu); 592 mysysctl("kern.smp.maxcpus", &maxcpu, &size, NULL, 0); 593 if (size != sizeof(maxcpu)) 594 errx(1, "sysctl kern.smp.maxcpus"); 595 size = sizeof(long) * maxcpu * CPUSTATES; 596 times = malloc(size); 597 if (times == NULL) 598 err(1, "malloc %zd bytes", size); 599 mysysctl("kern.cp_times", times, &size, NULL, 0); 600 maxid = (size / CPUSTATES / sizeof(long)) - 1; 601 for (i = 0; i <= maxid; i++) { 602 empty = 1; 603 for (j = 0; empty && j < CPUSTATES; j++) { 604 if (times[i * CPUSTATES + j] != 0) 605 empty = 0; 606 } 607 if (!empty) { 608 mask |= (1ul << i); 609 ncpus++; 610 } 611 } 612 if (maskp) 613 *maskp = mask; 614 if (maxidp) 615 *maxidp = maxid; 616 return (ncpus); 617} 618 619 620static void 621prthuman(u_int64_t val, int size) 622{ 623 char buf[10]; 624 int flags; 625 626 if (size < 5 || size > 9) 627 errx(1, "doofus"); 628 flags = HN_B | HN_NOSPACE | HN_DECIMAL; 629 humanize_number(buf, size, val, "", HN_AUTOSCALE, flags); 630 printf("%*s", size, buf); 631} 632 633static int hz, hdrcnt; 634 635static long *cur_cp_times; 636static long *last_cp_times; 637static size_t size_cp_times; 638 639static void 640dovmstat(unsigned int interval, int reps) 641{ 642 struct vmtotal total; 643 time_t uptime, halfuptime; 644 struct devinfo *tmp_dinfo; 645 size_t size; 646 int ncpus, maxid; 647 u_long cpumask; 648 int rate_adj; 649 650 uptime = getuptime(); 651 halfuptime = uptime / 2; 652 rate_adj = 1; 653 ncpus = 1; 654 maxid = 0; 655 656 /* 657 * If the user stops the program (control-Z) and then resumes it, 658 * print out the header again. 659 */ 660 (void)signal(SIGCONT, needhdr); 661 662 /* 663 * If our standard output is a tty, then install a SIGWINCH handler 664 * and set wresized so that our first iteration through the main 665 * vmstat loop will peek at the terminal's current rows to find out 666 * how many lines can fit in a screenful of output. 667 */ 668 if (isatty(fileno(stdout)) != 0) { 669 wresized = 1; 670 (void)signal(SIGWINCH, needresize); 671 } else { 672 wresized = 0; 673 winlines = VMSTAT_DEFAULT_LINES; 674 } 675 676 if (kd != NULL) { 677 if (namelist[X_STATHZ].n_type != 0 && 678 namelist[X_STATHZ].n_value != 0) 679 kread(X_STATHZ, &hz, sizeof(hz)); 680 if (!hz) 681 kread(X_HZ, &hz, sizeof(hz)); 682 } else { 683 struct clockinfo clockrate; 684 685 size = sizeof(clockrate); 686 mysysctl("kern.clockrate", &clockrate, &size, NULL, 0); 687 if (size != sizeof(clockrate)) 688 errx(1, "clockrate size mismatch"); 689 hz = clockrate.hz; 690 } 691 692 if (Pflag) { 693 ncpus = getcpuinfo(&cpumask, &maxid); 694 size_cp_times = sizeof(long) * (maxid + 1) * CPUSTATES; 695 cur_cp_times = calloc(1, size_cp_times); 696 last_cp_times = calloc(1, size_cp_times); 697 } 698 for (hdrcnt = 1;;) { 699 if (!--hdrcnt) 700 printhdr(maxid, cpumask); 701 if (kd != NULL) { 702 if (kvm_getcptime(kd, cur.cp_time) < 0) 703 errx(1, "kvm_getcptime: %s", kvm_geterr(kd)); 704 } else { 705 size = sizeof(cur.cp_time); 706 mysysctl("kern.cp_time", &cur.cp_time, &size, NULL, 0); 707 if (size != sizeof(cur.cp_time)) 708 errx(1, "cp_time size mismatch"); 709 } 710 if (Pflag) { 711 size = size_cp_times; 712 mysysctl("kern.cp_times", cur_cp_times, &size, NULL, 0); 713 if (size != size_cp_times) 714 errx(1, "cp_times mismatch"); 715 } 716 717 tmp_dinfo = last.dinfo; 718 last.dinfo = cur.dinfo; 719 cur.dinfo = tmp_dinfo; 720 last.snap_time = cur.snap_time; 721 722 /* 723 * Here what we want to do is refresh our device stats. 724 * getdevs() returns 1 when the device list has changed. 725 * If the device list has changed, we want to go through 726 * the selection process again, in case a device that we 727 * were previously displaying has gone away. 728 */ 729 switch (devstat_getdevs(NULL, &cur)) { 730 case -1: 731 errx(1, "%s", devstat_errbuf); 732 break; 733 case 1: { 734 int retval; 735 736 num_devices = cur.dinfo->numdevs; 737 generation = cur.dinfo->generation; 738 739 retval = devstat_selectdevs(&dev_select, &num_selected, 740 &num_selections, &select_generation, 741 generation, cur.dinfo->devices, 742 num_devices, matches, num_matches, 743 specified_devices, 744 num_devices_specified, select_mode, 745 maxshowdevs, 0); 746 switch (retval) { 747 case -1: 748 errx(1, "%s", devstat_errbuf); 749 break; 750 case 1: 751 printhdr(maxid, cpumask); 752 break; 753 default: 754 break; 755 } 756 } 757 default: 758 break; 759 } 760 761 fill_vmmeter(&sum); 762 fill_vmtotal(&total); 763 (void)printf("%2d %1d %1d", 764 total.t_rq - 1, total.t_dw + total.t_pw, total.t_sw); 765#define vmstat_pgtok(a) ((a) * (sum.v_page_size >> 10)) 766#define rate(x) (((x) * rate_adj + halfuptime) / uptime) /* round */ 767 if (hflag) { 768 printf(" "); 769 prthuman(total.t_avm * (u_int64_t)sum.v_page_size, 7); 770 printf(" "); 771 prthuman(total.t_free * (u_int64_t)sum.v_page_size, 6); 772 printf(" "); 773 } else { 774 printf(" %7d ", vmstat_pgtok(total.t_avm)); 775 printf(" %6d ", vmstat_pgtok(total.t_free)); 776 } 777 (void)printf("%5lu ", 778 (unsigned long)rate(sum.v_vm_faults - osum.v_vm_faults)); 779 (void)printf("%3lu ", 780 (unsigned long)rate(sum.v_reactivated - osum.v_reactivated)); 781 (void)printf("%3lu ", 782 (unsigned long)rate(sum.v_swapin + sum.v_vnodein - 783 (osum.v_swapin + osum.v_vnodein))); 784 (void)printf("%3lu ", 785 (unsigned long)rate(sum.v_swapout + sum.v_vnodeout - 786 (osum.v_swapout + osum.v_vnodeout))); 787 (void)printf("%5lu ", 788 (unsigned long)rate(sum.v_tfree - osum.v_tfree)); 789 (void)printf("%3lu ", 790 (unsigned long)rate(sum.v_pdpages - osum.v_pdpages)); 791 devstats(); 792 (void)printf("%4lu %4lu %4lu", 793 (unsigned long)rate(sum.v_intr - osum.v_intr), 794 (unsigned long)rate(sum.v_syscall - osum.v_syscall), 795 (unsigned long)rate(sum.v_swtch - osum.v_swtch)); 796 if (Pflag) 797 pcpustats(ncpus, cpumask, maxid); 798 else 799 cpustats(); 800 (void)printf("\n"); 801 (void)fflush(stdout); 802 if (reps >= 0 && --reps <= 0) 803 break; 804 osum = sum; 805 uptime = interval; 806 rate_adj = 1000; 807 /* 808 * We round upward to avoid losing low-frequency events 809 * (i.e., >= 1 per interval but < 1 per millisecond). 810 */ 811 if (interval != 1) 812 halfuptime = (uptime + 1) / 2; 813 else 814 halfuptime = 0; 815 (void)usleep(interval * 1000); 816 } 817} 818 819static void 820printhdr(int maxid, u_long cpumask) 821{ 822 int i, num_shown; 823 824 num_shown = (num_selected < maxshowdevs) ? num_selected : maxshowdevs; 825 (void)printf(" procs memory page%*s", 19, ""); 826 if (num_shown > 1) 827 (void)printf(" disks %*s", num_shown * 4 - 7, ""); 828 else if (num_shown == 1) 829 (void)printf("disk"); 830 (void)printf(" faults "); 831 if (Pflag) { 832 for (i = 0; i <= maxid; i++) { 833 if (cpumask & (1ul << i)) 834 printf("cpu%-2d ", i); 835 } 836 printf("\n"); 837 } else 838 printf("cpu\n"); 839 (void)printf(" r b w avm fre flt re pi po fr sr "); 840 for (i = 0; i < num_devices; i++) 841 if ((dev_select[i].selected) 842 && (dev_select[i].selected <= maxshowdevs)) 843 (void)printf("%c%c%d ", dev_select[i].device_name[0], 844 dev_select[i].device_name[1], 845 dev_select[i].unit_number); 846 (void)printf(" in sy cs"); 847 if (Pflag) { 848 for (i = 0; i <= maxid; i++) { 849 if (cpumask & (1ul << i)) 850 printf(" us sy id"); 851 } 852 printf("\n"); 853 } else 854 printf(" us sy id\n"); 855 if (wresized != 0) 856 doresize(); 857 hdrcnt = winlines; 858} 859 860/* 861 * Force a header to be prepended to the next output. 862 */ 863static void 864needhdr(int dummy __unused) 865{ 866 867 hdrcnt = 1; 868} 869 870/* 871 * When the terminal is resized, force an update of the maximum number of rows 872 * printed between each header repetition. Then force a new header to be 873 * prepended to the next output. 874 */ 875void 876needresize(int signo) 877{ 878 879 wresized = 1; 880 hdrcnt = 1; 881} 882 883/* 884 * Update the global `winlines' count of terminal rows. 885 */ 886void 887doresize(void) 888{ 889 int status; 890 struct winsize w; 891 892 for (;;) { 893 status = ioctl(fileno(stdout), TIOCGWINSZ, &w); 894 if (status == -1 && errno == EINTR) 895 continue; 896 else if (status == -1) 897 err(1, "ioctl"); 898 if (w.ws_row > 3) 899 winlines = w.ws_row - 3; 900 else 901 winlines = VMSTAT_DEFAULT_LINES; 902 break; 903 } 904 905 /* 906 * Inhibit doresize() calls until we are rescheduled by SIGWINCH. 907 */ 908 wresized = 0; 909} 910 911#ifdef notyet 912static void 913dotimes(void) 914{ 915 unsigned int pgintime, rectime; 916 917 kread(X_REC, &rectime, sizeof(rectime)); 918 kread(X_PGIN, &pgintime, sizeof(pgintime)); 919 kread(X_SUM, &sum, sizeof(sum)); 920 (void)printf("%u reclaims, %u total time (usec)\n", 921 sum.v_pgrec, rectime); 922 (void)printf("average: %u usec / reclaim\n", rectime / sum.v_pgrec); 923 (void)printf("\n"); 924 (void)printf("%u page ins, %u total time (msec)\n", 925 sum.v_pgin, pgintime / 10); 926 (void)printf("average: %8.1f msec / page in\n", 927 pgintime / (sum.v_pgin * 10.0)); 928} 929#endif 930 931static long 932pct(long top, long bot) 933{ 934 long ans; 935 936 if (bot == 0) 937 return(0); 938 ans = (quad_t)top * 100 / bot; 939 return (ans); 940} 941 942#define PCT(top, bot) pct((long)(top), (long)(bot)) 943 944static void 945dosum(void) 946{ 947 struct nchstats lnchstats; 948 long nchtotal; 949 950 fill_vmmeter(&sum); 951 (void)printf("%9u cpu context switches\n", sum.v_swtch); 952 (void)printf("%9u device interrupts\n", sum.v_intr); 953 (void)printf("%9u software interrupts\n", sum.v_soft); 954 (void)printf("%9u traps\n", sum.v_trap); 955 (void)printf("%9u system calls\n", sum.v_syscall); 956 (void)printf("%9u kernel threads created\n", sum.v_kthreads); 957 (void)printf("%9u fork() calls\n", sum.v_forks); 958 (void)printf("%9u vfork() calls\n", sum.v_vforks); 959 (void)printf("%9u rfork() calls\n", sum.v_rforks); 960 (void)printf("%9u swap pager pageins\n", sum.v_swapin); 961 (void)printf("%9u swap pager pages paged in\n", sum.v_swappgsin); 962 (void)printf("%9u swap pager pageouts\n", sum.v_swapout); 963 (void)printf("%9u swap pager pages paged out\n", sum.v_swappgsout); 964 (void)printf("%9u vnode pager pageins\n", sum.v_vnodein); 965 (void)printf("%9u vnode pager pages paged in\n", sum.v_vnodepgsin); 966 (void)printf("%9u vnode pager pageouts\n", sum.v_vnodeout); 967 (void)printf("%9u vnode pager pages paged out\n", sum.v_vnodepgsout); 968 (void)printf("%9u page daemon wakeups\n", sum.v_pdwakeups); 969 (void)printf("%9u pages examined by the page daemon\n", sum.v_pdpages); 970 (void)printf("%9u pages reactivated\n", sum.v_reactivated); 971 (void)printf("%9u copy-on-write faults\n", sum.v_cow_faults); 972 (void)printf("%9u copy-on-write optimized faults\n", sum.v_cow_optim); 973 (void)printf("%9u zero fill pages zeroed\n", sum.v_zfod); 974 (void)printf("%9u zero fill pages prezeroed\n", sum.v_ozfod); 975 (void)printf("%9u intransit blocking page faults\n", sum.v_intrans); 976 (void)printf("%9u total VM faults taken\n", sum.v_vm_faults); 977 (void)printf("%9u page faults requiring I/O\n", sum.v_io_faults); 978 (void)printf("%9u pages affected by kernel thread creation\n", sum.v_kthreadpages); 979 (void)printf("%9u pages affected by fork()\n", sum.v_forkpages); 980 (void)printf("%9u pages affected by vfork()\n", sum.v_vforkpages); 981 (void)printf("%9u pages affected by rfork()\n", sum.v_rforkpages); 982 (void)printf("%9u pages cached\n", sum.v_tcached); 983 (void)printf("%9u pages freed\n", sum.v_tfree); 984 (void)printf("%9u pages freed by daemon\n", sum.v_dfree); 985 (void)printf("%9u pages freed by exiting processes\n", sum.v_pfree); 986 (void)printf("%9u pages active\n", sum.v_active_count); 987 (void)printf("%9u pages inactive\n", sum.v_inactive_count); 988 (void)printf("%9u pages in VM cache\n", sum.v_cache_count); 989 (void)printf("%9u pages wired down\n", sum.v_wire_count); 990 (void)printf("%9u pages free\n", sum.v_free_count); 991 (void)printf("%9u bytes per page\n", sum.v_page_size); 992 if (kd != NULL) { 993 kread(X_NCHSTATS, &lnchstats, sizeof(lnchstats)); 994 } else { 995 size_t size = sizeof(lnchstats); 996 mysysctl("vfs.cache.nchstats", &lnchstats, &size, NULL, 0); 997 if (size != sizeof(lnchstats)) 998 errx(1, "vfs.cache.nchstats size mismatch"); 999 } 1000 nchtotal = lnchstats.ncs_goodhits + lnchstats.ncs_neghits + 1001 lnchstats.ncs_badhits + lnchstats.ncs_falsehits + 1002 lnchstats.ncs_miss + lnchstats.ncs_long; 1003 (void)printf("%9ld total name lookups\n", nchtotal); 1004 (void)printf( 1005 "%9s cache hits (%ld%% pos + %ld%% neg) system %ld%% per-directory\n", 1006 "", PCT(lnchstats.ncs_goodhits, nchtotal), 1007 PCT(lnchstats.ncs_neghits, nchtotal), 1008 PCT(lnchstats.ncs_pass2, nchtotal)); 1009 (void)printf("%9s deletions %ld%%, falsehits %ld%%, toolong %ld%%\n", "", 1010 PCT(lnchstats.ncs_badhits, nchtotal), 1011 PCT(lnchstats.ncs_falsehits, nchtotal), 1012 PCT(lnchstats.ncs_long, nchtotal)); 1013} 1014 1015static void 1016doforkst(void) 1017{ 1018 fill_vmmeter(&sum); 1019 (void)printf("%u forks, %u pages, average %.2f\n", 1020 sum.v_forks, sum.v_forkpages, 1021 sum.v_forks == 0 ? 0.0 : 1022 (double)sum.v_forkpages / sum.v_forks); 1023 (void)printf("%u vforks, %u pages, average %.2f\n", 1024 sum.v_vforks, sum.v_vforkpages, 1025 sum.v_vforks == 0 ? 0.0 : 1026 (double)sum.v_vforkpages / sum.v_vforks); 1027 (void)printf("%u rforks, %u pages, average %.2f\n", 1028 sum.v_rforks, sum.v_rforkpages, 1029 sum.v_rforks == 0 ? 0.0 : 1030 (double)sum.v_rforkpages / sum.v_rforks); 1031} 1032 1033static void 1034devstats(void) 1035{ 1036 int dn, state; 1037 long double transfers_per_second; 1038 long double busy_seconds; 1039 long tmp; 1040 1041 for (state = 0; state < CPUSTATES; ++state) { 1042 tmp = cur.cp_time[state]; 1043 cur.cp_time[state] -= last.cp_time[state]; 1044 last.cp_time[state] = tmp; 1045 } 1046 1047 busy_seconds = cur.snap_time - last.snap_time; 1048 1049 for (dn = 0; dn < num_devices; dn++) { 1050 int di; 1051 1052 if ((dev_select[dn].selected == 0) 1053 || (dev_select[dn].selected > maxshowdevs)) 1054 continue; 1055 1056 di = dev_select[dn].position; 1057 1058 if (devstat_compute_statistics(&cur.dinfo->devices[di], 1059 &last.dinfo->devices[di], busy_seconds, 1060 DSM_TRANSFERS_PER_SECOND, &transfers_per_second, 1061 DSM_NONE) != 0) 1062 errx(1, "%s", devstat_errbuf); 1063 1064 (void)printf("%3.0Lf ", transfers_per_second); 1065 } 1066} 1067 1068static void 1069percent(double pct, int *over) 1070{ 1071 char buf[10]; 1072 int l; 1073 1074 l = snprintf(buf, sizeof(buf), "%.0f", pct); 1075 if (l == 1 && *over) { 1076 printf("%s", buf); 1077 (*over)--; 1078 } else 1079 printf("%2s", buf); 1080 if (l > 2) 1081 (*over)++; 1082} 1083 1084static void 1085cpustats(void) 1086{ 1087 int state, over; 1088 double lpct, total; 1089 1090 total = 0; 1091 for (state = 0; state < CPUSTATES; ++state) 1092 total += cur.cp_time[state]; 1093 if (total) 1094 lpct = 100.0 / total; 1095 else 1096 lpct = 0.0; 1097 over = 0; 1098 printf(" "); 1099 percent((cur.cp_time[CP_USER] + cur.cp_time[CP_NICE]) * lpct, &over); 1100 printf(" "); 1101 percent((cur.cp_time[CP_SYS] + cur.cp_time[CP_INTR]) * lpct, &over); 1102 printf(" "); 1103 percent(cur.cp_time[CP_IDLE] * lpct, &over); 1104} 1105 1106static void 1107pcpustats(int ncpus, u_long cpumask, int maxid) 1108{ 1109 int state, i; 1110 double lpct, total; 1111 long tmp; 1112 int over; 1113 1114 /* devstats does this for cp_time */ 1115 for (i = 0; i <= maxid; i++) { 1116 if ((cpumask & (1ul << i)) == 0) 1117 continue; 1118 for (state = 0; state < CPUSTATES; ++state) { 1119 tmp = cur_cp_times[i * CPUSTATES + state]; 1120 cur_cp_times[i * CPUSTATES + state] -= last_cp_times[i * CPUSTATES + state]; 1121 last_cp_times[i * CPUSTATES + state] = tmp; 1122 } 1123 } 1124 1125 over = 0; 1126 for (i = 0; i <= maxid; i++) { 1127 if ((cpumask & (1ul << i)) == 0) 1128 continue; 1129 total = 0; 1130 for (state = 0; state < CPUSTATES; ++state) 1131 total += cur_cp_times[i * CPUSTATES + state]; 1132 if (total) 1133 lpct = 100.0 / total; 1134 else 1135 lpct = 0.0; 1136 printf(" "); 1137 percent((cur_cp_times[i * CPUSTATES + CP_USER] + 1138 cur_cp_times[i * CPUSTATES + CP_NICE]) * lpct, &over); 1139 printf(" "); 1140 percent((cur_cp_times[i * CPUSTATES + CP_SYS] + 1141 cur_cp_times[i * CPUSTATES + CP_INTR]) * lpct, &over); 1142 printf(" "); 1143 percent(cur_cp_times[i * CPUSTATES + CP_IDLE] * lpct, &over); 1144 } 1145} 1146 1147static void 1148dointr(void) 1149{ 1150 unsigned long *intrcnt, uptime; 1151 uint64_t inttotal; 1152 size_t clen, inamlen, intrcntlen, istrnamlen; 1153 unsigned int i, nintr; 1154 char *intrname, *tintrname; 1155 1156 uptime = getuptime(); 1157 if (kd != NULL) { 1158 kread(X_SINTRCNT, &intrcntlen, sizeof(intrcntlen)); 1159 kread(X_SINTRNAMES, &inamlen, sizeof(inamlen)); 1160 if ((intrcnt = malloc(intrcntlen)) == NULL || 1161 (intrname = malloc(inamlen)) == NULL) 1162 err(1, "malloc()"); 1163 kread(X_INTRCNT, intrcnt, intrcntlen); 1164 kread(X_INTRNAMES, intrname, inamlen); 1165 } else { 1166 for (intrcnt = NULL, intrcntlen = 1024; ; intrcntlen *= 2) { 1167 if ((intrcnt = reallocf(intrcnt, intrcntlen)) == NULL) 1168 err(1, "reallocf()"); 1169 if (mysysctl("hw.intrcnt", 1170 intrcnt, &intrcntlen, NULL, 0) == 0) 1171 break; 1172 } 1173 for (intrname = NULL, inamlen = 1024; ; inamlen *= 2) { 1174 if ((intrname = reallocf(intrname, inamlen)) == NULL) 1175 err(1, "reallocf()"); 1176 if (mysysctl("hw.intrnames", 1177 intrname, &inamlen, NULL, 0) == 0) 1178 break; 1179 } 1180 } 1181 nintr = intrcntlen / sizeof(unsigned long); 1182 tintrname = intrname; 1183 istrnamlen = strlen("interrupt"); 1184 for (i = 0; i < nintr; i++) { 1185 clen = strlen(tintrname); 1186 if (clen > istrnamlen) 1187 istrnamlen = clen; 1188 tintrname += clen + 1; 1189 } 1190 (void)printf("%-*s %20s %10s\n", (int)istrnamlen, "interrupt", "total", 1191 "rate"); 1192 inttotal = 0; 1193 for (i = 0; i < nintr; i++) { 1194 if (intrname[0] != '\0' && (*intrcnt != 0 || aflag)) 1195 (void)printf("%-*s %20lu %10lu\n", (int)istrnamlen, 1196 intrname, *intrcnt, *intrcnt / uptime); 1197 intrname += strlen(intrname) + 1; 1198 inttotal += *intrcnt++; 1199 } 1200 (void)printf("%-*s %20" PRIu64 " %10" PRIu64 "\n", (int)istrnamlen, 1201 "Total", inttotal, inttotal / uptime); 1202} 1203 1204static void 1205domemstat_malloc(void) 1206{ 1207 struct memory_type_list *mtlp; 1208 struct memory_type *mtp; 1209 int error, first, i; 1210 1211 mtlp = memstat_mtl_alloc(); 1212 if (mtlp == NULL) { 1213 warn("memstat_mtl_alloc"); 1214 return; 1215 } 1216 if (kd == NULL) { 1217 if (memstat_sysctl_malloc(mtlp, 0) < 0) { 1218 warnx("memstat_sysctl_malloc: %s", 1219 memstat_strerror(memstat_mtl_geterror(mtlp))); 1220 return; 1221 } 1222 } else { 1223 if (memstat_kvm_malloc(mtlp, kd) < 0) { 1224 error = memstat_mtl_geterror(mtlp); 1225 if (error == MEMSTAT_ERROR_KVM) 1226 warnx("memstat_kvm_malloc: %s", 1227 kvm_geterr(kd)); 1228 else 1229 warnx("memstat_kvm_malloc: %s", 1230 memstat_strerror(error)); 1231 } 1232 } 1233 printf("%13s %5s %6s %7s %8s Size(s)\n", "Type", "InUse", "MemUse", 1234 "HighUse", "Requests"); 1235 for (mtp = memstat_mtl_first(mtlp); mtp != NULL; 1236 mtp = memstat_mtl_next(mtp)) { 1237 if (memstat_get_numallocs(mtp) == 0 && 1238 memstat_get_count(mtp) == 0) 1239 continue; 1240 printf("%13s %5" PRIu64 " %5" PRIu64 "K %7s %8" PRIu64 " ", 1241 memstat_get_name(mtp), memstat_get_count(mtp), 1242 (memstat_get_bytes(mtp) + 1023) / 1024, "-", 1243 memstat_get_numallocs(mtp)); 1244 first = 1; 1245 for (i = 0; i < 32; i++) { 1246 if (memstat_get_sizemask(mtp) & (1 << i)) { 1247 if (!first) 1248 printf(","); 1249 printf("%d", 1 << (i + 4)); 1250 first = 0; 1251 } 1252 } 1253 printf("\n"); 1254 } 1255 memstat_mtl_free(mtlp); 1256} 1257 1258static void 1259domemstat_zone(void) 1260{ 1261 struct memory_type_list *mtlp; 1262 struct memory_type *mtp; 1263 char name[MEMTYPE_MAXNAME + 1]; 1264 int error; 1265 1266 mtlp = memstat_mtl_alloc(); 1267 if (mtlp == NULL) { 1268 warn("memstat_mtl_alloc"); 1269 return; 1270 } 1271 if (kd == NULL) { 1272 if (memstat_sysctl_uma(mtlp, 0) < 0) { 1273 warnx("memstat_sysctl_uma: %s", 1274 memstat_strerror(memstat_mtl_geterror(mtlp))); 1275 return; 1276 } 1277 } else { 1278 if (memstat_kvm_uma(mtlp, kd) < 0) { 1279 error = memstat_mtl_geterror(mtlp); 1280 if (error == MEMSTAT_ERROR_KVM) 1281 warnx("memstat_kvm_uma: %s", 1282 kvm_geterr(kd)); 1283 else 1284 warnx("memstat_kvm_uma: %s", 1285 memstat_strerror(error)); 1286 } 1287 } 1288 printf("%-20s %6s %6s %8s %8s %8s %4s %4s\n\n", "ITEM", "SIZE", 1289 "LIMIT", "USED", "FREE", "REQ", "FAIL", "SLEEP"); 1290 for (mtp = memstat_mtl_first(mtlp); mtp != NULL; 1291 mtp = memstat_mtl_next(mtp)) { 1292 strlcpy(name, memstat_get_name(mtp), MEMTYPE_MAXNAME); 1293 strcat(name, ":"); 1294 printf("%-20s %6" PRIu64 ", %6" PRIu64 ",%8" PRIu64 ",%8" PRIu64 1295 ",%8" PRIu64 ",%4" PRIu64 ",%4" PRIu64 "\n", name, 1296 memstat_get_size(mtp), memstat_get_countlimit(mtp), 1297 memstat_get_count(mtp), memstat_get_free(mtp), 1298 memstat_get_numallocs(mtp), memstat_get_failures(mtp), 1299 memstat_get_sleeps(mtp)); 1300 } 1301 memstat_mtl_free(mtlp); 1302 printf("\n"); 1303} 1304 1305/* 1306 * kread reads something from the kernel, given its nlist index. 1307 */ 1308static void 1309kreado(int nlx, void *addr, size_t size, size_t offset) 1310{ 1311 const char *sym; 1312 1313 if (namelist[nlx].n_type == 0 || namelist[nlx].n_value == 0) { 1314 sym = namelist[nlx].n_name; 1315 if (*sym == '_') 1316 ++sym; 1317 errx(1, "symbol %s not defined", sym); 1318 } 1319 if ((size_t)kvm_read(kd, namelist[nlx].n_value + offset, addr, 1320 size) != size) { 1321 sym = namelist[nlx].n_name; 1322 if (*sym == '_') 1323 ++sym; 1324 errx(1, "%s: %s", sym, kvm_geterr(kd)); 1325 } 1326} 1327 1328static void 1329kread(int nlx, void *addr, size_t size) 1330{ 1331 kreado(nlx, addr, size, 0); 1332} 1333 1334static char * 1335kgetstr(const char *strp) 1336{ 1337 int n = 0, size = 1; 1338 char *ret = NULL; 1339 1340 do { 1341 if (size == n + 1) { 1342 ret = realloc(ret, size); 1343 if (ret == NULL) 1344 err(1, "%s: realloc", __func__); 1345 size *= 2; 1346 } 1347 if (kvm_read(kd, (u_long)strp + n, &ret[n], 1) != 1) 1348 errx(1, "%s: %s", __func__, kvm_geterr(kd)); 1349 } while (ret[n++] != '\0'); 1350 return (ret); 1351} 1352 1353static void 1354usage(void) 1355{ 1356 (void)fprintf(stderr, "%s%s", 1357 "usage: vmstat [-afHhimPsz] [-c count] [-M core [-N system]] [-w wait]\n", 1358 " [-n devs] [-p type,if,pass] [disks]\n"); 1359 exit(1); 1360} 1361