vmstat.c revision 198620
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#ifndef lint 35static const char copyright[] = 36"@(#) Copyright (c) 1980, 1986, 1991, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38#endif /* not lint */ 39 40#if 0 41#ifndef lint 42static char sccsid[] = "@(#)vmstat.c 8.1 (Berkeley) 6/6/93"; 43#endif /* not lint */ 44#endif 45 46#include <sys/cdefs.h> 47__FBSDID("$FreeBSD: head/usr.bin/vmstat/vmstat.c 198620 2009-10-29 17:34:02Z jhb $"); 48 49#include <sys/param.h> 50#include <sys/time.h> 51#include <sys/proc.h> 52#include <sys/uio.h> 53#include <sys/namei.h> 54#include <sys/malloc.h> 55#include <sys/signal.h> 56#include <sys/fcntl.h> 57#include <sys/ioctl.h> 58#include <sys/resource.h> 59#include <sys/sysctl.h> 60#include <sys/vmmeter.h> 61#include <sys/pcpu.h> 62 63#include <vm/vm_param.h> 64 65#include <ctype.h> 66#include <devstat.h> 67#include <err.h> 68#include <errno.h> 69#include <kvm.h> 70#include <limits.h> 71#include <memstat.h> 72#include <nlist.h> 73#include <paths.h> 74#include <stdio.h> 75#include <stdlib.h> 76#include <string.h> 77#include <sysexits.h> 78#include <time.h> 79#include <unistd.h> 80#include <libutil.h> 81 82static char da[] = "da"; 83 84static struct nlist namelist[] = { 85#define X_SUM 0 86 { "_cnt" }, 87#define X_BOOTTIME 1 88 { "_boottime" }, 89#define X_HZ 2 90 { "_hz" }, 91#define X_STATHZ 3 92 { "_stathz" }, 93#define X_NCHSTATS 4 94 { "_nchstats" }, 95#define X_INTRNAMES 5 96 { "_intrnames" }, 97#define X_EINTRNAMES 6 98 { "_eintrnames" }, 99#define X_INTRCNT 7 100 { "_intrcnt" }, 101#define X_EINTRCNT 8 102 { "_eintrcnt" }, 103#define X_KMEMSTATS 9 104 { "_kmemstatistics" }, 105#define X_KMEMZONES 10 106 { "_kmemzones" }, 107#ifdef notyet 108#define X_DEFICIT XXX 109 { "_deficit" }, 110#define X_REC XXX 111 { "_rectime" }, 112#define X_PGIN XXX 113 { "_pgintime" }, 114#define X_XSTATS XXX 115 { "_xstats" }, 116#define X_END XXX 117#else 118#define X_END 11 119#endif 120 { "" }, 121}; 122 123static struct statinfo cur, last; 124static int num_devices, maxshowdevs; 125static long generation; 126static struct device_selection *dev_select; 127static int num_selected; 128static struct devstat_match *matches; 129static int num_matches = 0; 130static int num_devices_specified, num_selections; 131static long select_generation; 132static char **specified_devices; 133static devstat_select_mode select_mode; 134 135static struct vmmeter sum, osum; 136 137#define VMSTAT_DEFAULT_LINES 20 /* Default number of `winlines'. */ 138volatile sig_atomic_t wresized; /* Tty resized, when non-zero. */ 139static int winlines = VMSTAT_DEFAULT_LINES; /* Current number of tty rows. */ 140 141static int aflag; 142static int nflag; 143static int Pflag; 144static int hflag; 145 146static kvm_t *kd; 147 148#define FORKSTAT 0x01 149#define INTRSTAT 0x02 150#define MEMSTAT 0x04 151#define SUMSTAT 0x08 152#define TIMESTAT 0x10 153#define VMSTAT 0x20 154#define ZMEMSTAT 0x40 155 156static void cpustats(void); 157static void pcpustats(int, u_long, int); 158static void devstats(void); 159static void doforkst(void); 160static void dointr(void); 161static void dosum(void); 162static void dovmstat(unsigned int, int); 163static void domemstat_malloc(void); 164static void domemstat_zone(void); 165static void kread(int, void *, size_t); 166static void kreado(int, void *, size_t, size_t); 167static char *kgetstr(const char *); 168static void needhdr(int); 169static void needresize(int); 170static void doresize(void); 171static void printhdr(int, u_long); 172static void usage(void); 173 174static long pct(long, long); 175static long getuptime(void); 176 177static char **getdrivedata(char **); 178 179int 180main(int argc, char *argv[]) 181{ 182 int c, todo; 183 unsigned int interval; 184 int reps; 185 char *memf, *nlistf; 186 char errbuf[_POSIX2_LINE_MAX]; 187 188 memf = nlistf = NULL; 189 interval = reps = todo = 0; 190 maxshowdevs = 2; 191 hflag = isatty(1); 192 while ((c = getopt(argc, argv, "ac:fhHiM:mN:n:Pp:stw:z")) != -1) { 193 switch (c) { 194 case 'a': 195 aflag++; 196 break; 197 case 'c': 198 reps = atoi(optarg); 199 break; 200 case 'P': 201 Pflag++; 202 break; 203 case 'f': 204 todo |= FORKSTAT; 205 break; 206 case 'h': 207 hflag = 1; 208 break; 209 case 'H': 210 hflag = 0; 211 break; 212 case 'i': 213 todo |= INTRSTAT; 214 break; 215 case 'M': 216 memf = optarg; 217 break; 218 case 'm': 219 todo |= MEMSTAT; 220 break; 221 case 'N': 222 nlistf = optarg; 223 break; 224 case 'n': 225 nflag = 1; 226 maxshowdevs = atoi(optarg); 227 if (maxshowdevs < 0) 228 errx(1, "number of devices %d is < 0", 229 maxshowdevs); 230 break; 231 case 'p': 232 if (devstat_buildmatch(optarg, &matches, &num_matches) != 0) 233 errx(1, "%s", devstat_errbuf); 234 break; 235 case 's': 236 todo |= SUMSTAT; 237 break; 238 case 't': 239#ifdef notyet 240 todo |= TIMESTAT; 241#else 242 errx(EX_USAGE, "sorry, -t is not (re)implemented yet"); 243#endif 244 break; 245 case 'w': 246 interval = atoi(optarg); 247 break; 248 case 'z': 249 todo |= ZMEMSTAT; 250 break; 251 case '?': 252 default: 253 usage(); 254 } 255 } 256 argc -= optind; 257 argv += optind; 258 259 if (todo == 0) 260 todo = VMSTAT; 261 262 if (memf != NULL) { 263 kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); 264 if (kd == NULL) 265 errx(1, "kvm_openfiles: %s", errbuf); 266 } 267 268 if (kd != NULL && (c = kvm_nlist(kd, namelist)) != 0) { 269 if (c > 0) { 270 warnx("undefined symbols:"); 271 for (c = 0; 272 c < (int)(sizeof(namelist)/sizeof(namelist[0])); 273 c++) 274 if (namelist[c].n_type == 0) 275 (void)fprintf(stderr, " %s", 276 namelist[c].n_name); 277 (void)fputc('\n', stderr); 278 } else 279 warnx("kvm_nlist: %s", kvm_geterr(kd)); 280 exit(1); 281 } 282 if (kd && Pflag) 283 errx(1, "Cannot use -P with crash dumps"); 284 285 if (todo & VMSTAT) { 286 /* 287 * Make sure that the userland devstat version matches the 288 * kernel devstat version. If not, exit and print a 289 * message informing the user of his mistake. 290 */ 291 if (devstat_checkversion(NULL) < 0) 292 errx(1, "%s", devstat_errbuf); 293 294 295 argv = getdrivedata(argv); 296 } 297 298#define BACKWARD_COMPATIBILITY 299#ifdef BACKWARD_COMPATIBILITY 300 if (*argv) { 301 interval = atoi(*argv); 302 if (*++argv) 303 reps = atoi(*argv); 304 } 305#endif 306 307 if (interval) { 308 if (!reps) 309 reps = -1; 310 } else if (reps) 311 interval = 1; 312 313 if (todo & FORKSTAT) 314 doforkst(); 315 if (todo & MEMSTAT) 316 domemstat_malloc(); 317 if (todo & ZMEMSTAT) 318 domemstat_zone(); 319 if (todo & SUMSTAT) 320 dosum(); 321#ifdef notyet 322 if (todo & TIMESTAT) 323 dotimes(); 324#endif 325 if (todo & INTRSTAT) 326 dointr(); 327 if (todo & VMSTAT) 328 dovmstat(interval, reps); 329 exit(0); 330} 331 332static int 333mysysctl(const char *name, void *oldp, size_t *oldlenp, 334 void *newp, size_t newlen) 335{ 336 int error; 337 338 error = sysctlbyname(name, oldp, oldlenp, newp, newlen); 339 if (error != 0 && errno != ENOMEM) 340 err(1, "sysctl(%s)", name); 341 return (error); 342} 343 344static char ** 345getdrivedata(char **argv) 346{ 347 if ((num_devices = devstat_getnumdevs(NULL)) < 0) 348 errx(1, "%s", devstat_errbuf); 349 350 cur.dinfo = (struct devinfo *)calloc(1, sizeof(struct devinfo)); 351 last.dinfo = (struct devinfo *)calloc(1, sizeof(struct devinfo)); 352 353 if (devstat_getdevs(NULL, &cur) == -1) 354 errx(1, "%s", devstat_errbuf); 355 356 num_devices = cur.dinfo->numdevs; 357 generation = cur.dinfo->generation; 358 359 specified_devices = (char **)malloc(sizeof(char *)); 360 for (num_devices_specified = 0; *argv; ++argv) { 361 if (isdigit(**argv)) 362 break; 363 num_devices_specified++; 364 specified_devices = (char **)realloc(specified_devices, 365 sizeof(char *) * 366 num_devices_specified); 367 specified_devices[num_devices_specified - 1] = *argv; 368 } 369 dev_select = NULL; 370 371 if (nflag == 0 && maxshowdevs < num_devices_specified) 372 maxshowdevs = num_devices_specified; 373 374 /* 375 * People are generally only interested in disk statistics when 376 * they're running vmstat. So, that's what we're going to give 377 * them if they don't specify anything by default. We'll also give 378 * them any other random devices in the system so that we get to 379 * maxshowdevs devices, if that many devices exist. If the user 380 * specifies devices on the command line, either through a pattern 381 * match or by naming them explicitly, we will give the user only 382 * those devices. 383 */ 384 if ((num_devices_specified == 0) && (num_matches == 0)) { 385 if (devstat_buildmatch(da, &matches, &num_matches) != 0) 386 errx(1, "%s", devstat_errbuf); 387 388 select_mode = DS_SELECT_ADD; 389 } else 390 select_mode = DS_SELECT_ONLY; 391 392 /* 393 * At this point, selectdevs will almost surely indicate that the 394 * device list has changed, so we don't look for return values of 0 395 * or 1. If we get back -1, though, there is an error. 396 */ 397 if (devstat_selectdevs(&dev_select, &num_selected, &num_selections, 398 &select_generation, generation, cur.dinfo->devices, 399 num_devices, matches, num_matches, specified_devices, 400 num_devices_specified, select_mode, 401 maxshowdevs, 0) == -1) 402 errx(1, "%s", devstat_errbuf); 403 404 return(argv); 405} 406 407static long 408getuptime(void) 409{ 410 struct timespec sp; 411 time_t uptime; 412 413 (void)clock_gettime(CLOCK_MONOTONIC, &sp); 414 uptime = sp.tv_sec; 415 if (uptime <= 0 || uptime > 60*60*24*365*10) 416 errx(1, "time makes no sense; namelist must be wrong"); 417 418 return(uptime); 419} 420 421static void 422fill_pcpu(struct pcpu ***pcpup, int* maxcpup) 423{ 424 struct pcpu **pcpu; 425 426 int maxcpu, size, i; 427 428 *pcpup = NULL; 429 430 if (kd == NULL) 431 return; 432 433 maxcpu = kvm_getmaxcpu(kd); 434 if (maxcpu < 0) 435 errx(1, "kvm_getmaxcpu: %s", kvm_geterr(kd)); 436 437 pcpu = calloc(maxcpu, sizeof(struct pcpu *)); 438 if (pcpu == NULL) 439 err(1, "calloc"); 440 441 for (i = 0; i < maxcpu; i++) { 442 pcpu[i] = kvm_getpcpu(kd, i); 443 if (pcpu[i] == (struct pcpu *)-1) 444 errx(1, "kvm_getpcpu: %s", kvm_geterr(kd)); 445 } 446 447 *maxcpup = maxcpu; 448 *pcpup = pcpu; 449} 450 451static void 452free_pcpu(struct pcpu **pcpu, int maxcpu) 453{ 454 int i; 455 456 for (i = 0; i < maxcpu; i++) 457 free(pcpu[i]); 458 free(pcpu); 459} 460 461static void 462fill_vmmeter(struct vmmeter *vmmp) 463{ 464 struct pcpu **pcpu; 465 int maxcpu, i; 466 467 if (kd != NULL) { 468 kread(X_SUM, vmmp, sizeof(*vmmp)); 469 fill_pcpu(&pcpu, &maxcpu); 470 for (i = 0; i < maxcpu; i++) { 471 if (pcpu[i] == NULL) 472 continue; 473#define ADD_FROM_PCPU(i, name) \ 474 vmmp->name += pcpu[i]->pc_cnt.name 475 ADD_FROM_PCPU(i, v_swtch); 476 ADD_FROM_PCPU(i, v_trap); 477 ADD_FROM_PCPU(i, v_syscall); 478 ADD_FROM_PCPU(i, v_intr); 479 ADD_FROM_PCPU(i, v_soft); 480 ADD_FROM_PCPU(i, v_vm_faults); 481 ADD_FROM_PCPU(i, v_cow_faults); 482 ADD_FROM_PCPU(i, v_cow_optim); 483 ADD_FROM_PCPU(i, v_zfod); 484 ADD_FROM_PCPU(i, v_ozfod); 485 ADD_FROM_PCPU(i, v_swapin); 486 ADD_FROM_PCPU(i, v_swapout); 487 ADD_FROM_PCPU(i, v_swappgsin); 488 ADD_FROM_PCPU(i, v_swappgsout); 489 ADD_FROM_PCPU(i, v_vnodein); 490 ADD_FROM_PCPU(i, v_vnodeout); 491 ADD_FROM_PCPU(i, v_vnodepgsin); 492 ADD_FROM_PCPU(i, v_vnodepgsout); 493 ADD_FROM_PCPU(i, v_intrans); 494 ADD_FROM_PCPU(i, v_tfree); 495 ADD_FROM_PCPU(i, v_forks); 496 ADD_FROM_PCPU(i, v_vforks); 497 ADD_FROM_PCPU(i, v_rforks); 498 ADD_FROM_PCPU(i, v_kthreads); 499 ADD_FROM_PCPU(i, v_forkpages); 500 ADD_FROM_PCPU(i, v_vforkpages); 501 ADD_FROM_PCPU(i, v_rforkpages); 502 ADD_FROM_PCPU(i, v_kthreadpages); 503#undef ADD_FROM_PCPU 504 } 505 free_pcpu(pcpu, maxcpu); 506 } else { 507 size_t size = sizeof(unsigned int); 508#define GET_VM_STATS(cat, name) \ 509 mysysctl("vm.stats." #cat "." #name, &vmmp->name, &size, NULL, 0) 510 /* sys */ 511 GET_VM_STATS(sys, v_swtch); 512 GET_VM_STATS(sys, v_trap); 513 GET_VM_STATS(sys, v_syscall); 514 GET_VM_STATS(sys, v_intr); 515 GET_VM_STATS(sys, v_soft); 516 517 /* vm */ 518 GET_VM_STATS(vm, v_vm_faults); 519 GET_VM_STATS(vm, v_cow_faults); 520 GET_VM_STATS(vm, v_cow_optim); 521 GET_VM_STATS(vm, v_zfod); 522 GET_VM_STATS(vm, v_ozfod); 523 GET_VM_STATS(vm, v_swapin); 524 GET_VM_STATS(vm, v_swapout); 525 GET_VM_STATS(vm, v_swappgsin); 526 GET_VM_STATS(vm, v_swappgsout); 527 GET_VM_STATS(vm, v_vnodein); 528 GET_VM_STATS(vm, v_vnodeout); 529 GET_VM_STATS(vm, v_vnodepgsin); 530 GET_VM_STATS(vm, v_vnodepgsout); 531 GET_VM_STATS(vm, v_intrans); 532 GET_VM_STATS(vm, v_reactivated); 533 GET_VM_STATS(vm, v_pdwakeups); 534 GET_VM_STATS(vm, v_pdpages); 535 GET_VM_STATS(vm, v_tcached); 536 GET_VM_STATS(vm, v_dfree); 537 GET_VM_STATS(vm, v_pfree); 538 GET_VM_STATS(vm, v_tfree); 539 GET_VM_STATS(vm, v_page_size); 540 GET_VM_STATS(vm, v_page_count); 541 GET_VM_STATS(vm, v_free_reserved); 542 GET_VM_STATS(vm, v_free_target); 543 GET_VM_STATS(vm, v_free_min); 544 GET_VM_STATS(vm, v_free_count); 545 GET_VM_STATS(vm, v_wire_count); 546 GET_VM_STATS(vm, v_active_count); 547 GET_VM_STATS(vm, v_inactive_target); 548 GET_VM_STATS(vm, v_inactive_count); 549 GET_VM_STATS(vm, v_cache_count); 550 GET_VM_STATS(vm, v_cache_min); 551 GET_VM_STATS(vm, v_cache_max); 552 GET_VM_STATS(vm, v_pageout_free_min); 553 GET_VM_STATS(vm, v_interrupt_free_min); 554 /*GET_VM_STATS(vm, v_free_severe);*/ 555 GET_VM_STATS(vm, v_forks); 556 GET_VM_STATS(vm, v_vforks); 557 GET_VM_STATS(vm, v_rforks); 558 GET_VM_STATS(vm, v_kthreads); 559 GET_VM_STATS(vm, v_forkpages); 560 GET_VM_STATS(vm, v_vforkpages); 561 GET_VM_STATS(vm, v_rforkpages); 562 GET_VM_STATS(vm, v_kthreadpages); 563#undef GET_VM_STATS 564 } 565} 566 567static void 568fill_vmtotal(struct vmtotal *vmtp) 569{ 570 if (kd != NULL) { 571 /* XXX fill vmtp */ 572 errx(1, "not implemented"); 573 } else { 574 size_t size = sizeof(*vmtp); 575 mysysctl("vm.vmtotal", vmtp, &size, NULL, 0); 576 if (size != sizeof(*vmtp)) 577 errx(1, "vm.total size mismatch"); 578 } 579} 580 581/* Determine how many cpu columns, and what index they are in kern.cp_times */ 582static int 583getcpuinfo(u_long *maskp, int *maxidp) 584{ 585 int maxcpu; 586 int maxid; 587 int ncpus; 588 int i, j; 589 int empty; 590 size_t size; 591 long *times; 592 u_long mask; 593 594 if (kd != NULL) 595 errx(1, "not implemented"); 596 mask = 0; 597 ncpus = 0; 598 size = sizeof(maxcpu); 599 mysysctl("kern.smp.maxcpus", &maxcpu, &size, NULL, 0); 600 if (size != sizeof(maxcpu)) 601 errx(1, "sysctl kern.smp.maxcpus"); 602 size = sizeof(long) * maxcpu * CPUSTATES; 603 times = malloc(size); 604 if (times == NULL) 605 err(1, "malloc %zd bytes", size); 606 mysysctl("kern.cp_times", times, &size, NULL, 0); 607 maxid = (size / CPUSTATES / sizeof(long)) - 1; 608 for (i = 0; i <= maxid; i++) { 609 empty = 1; 610 for (j = 0; empty && j < CPUSTATES; j++) { 611 if (times[i * CPUSTATES + j] != 0) 612 empty = 0; 613 } 614 if (!empty) { 615 mask |= (1ul << i); 616 ncpus++; 617 } 618 } 619 if (maskp) 620 *maskp = mask; 621 if (maxidp) 622 *maxidp = maxid; 623 return (ncpus); 624} 625 626 627static void 628prthuman(u_int64_t val, int size) 629{ 630 char buf[10]; 631 int flags; 632 633 if (size < 5 || size > 9) 634 errx(1, "doofus"); 635 flags = HN_B | HN_NOSPACE | HN_DECIMAL; 636 humanize_number(buf, size, val, "", HN_AUTOSCALE, flags); 637 printf("%*s", size, buf); 638} 639 640static int hz, hdrcnt; 641 642static long *cur_cp_times; 643static long *last_cp_times; 644static size_t size_cp_times; 645 646static void 647dovmstat(unsigned int interval, int reps) 648{ 649 struct vmtotal total; 650 time_t uptime, halfuptime; 651 struct devinfo *tmp_dinfo; 652 size_t size; 653 int ncpus, maxid; 654 u_long cpumask; 655 656 uptime = getuptime(); 657 halfuptime = uptime / 2; 658 659 /* 660 * If the user stops the program (control-Z) and then resumes it, 661 * print out the header again. 662 */ 663 (void)signal(SIGCONT, needhdr); 664 665 /* 666 * If our standard output is a tty, then install a SIGWINCH handler 667 * and set wresized so that our first iteration through the main 668 * vmstat loop will peek at the terminal's current rows to find out 669 * how many lines can fit in a screenful of output. 670 */ 671 if (isatty(fileno(stdout)) != 0) { 672 wresized = 1; 673 (void)signal(SIGWINCH, needresize); 674 } else { 675 wresized = 0; 676 winlines = VMSTAT_DEFAULT_LINES; 677 } 678 679 if (kd != NULL) { 680 if (namelist[X_STATHZ].n_type != 0 && 681 namelist[X_STATHZ].n_value != 0) 682 kread(X_STATHZ, &hz, sizeof(hz)); 683 if (!hz) 684 kread(X_HZ, &hz, sizeof(hz)); 685 } else { 686 struct clockinfo clockrate; 687 688 size = sizeof(clockrate); 689 mysysctl("kern.clockrate", &clockrate, &size, NULL, 0); 690 if (size != sizeof(clockrate)) 691 errx(1, "clockrate size mismatch"); 692 hz = clockrate.hz; 693 } 694 695 if (Pflag) { 696 ncpus = getcpuinfo(&cpumask, &maxid); 697 size_cp_times = sizeof(long) * (maxid + 1) * CPUSTATES; 698 cur_cp_times = calloc(1, size_cp_times); 699 last_cp_times = calloc(1, size_cp_times); 700 } 701 for (hdrcnt = 1;;) { 702 if (!--hdrcnt) 703 printhdr(ncpus, cpumask); 704 if (kd != NULL) { 705 if (kvm_getcptime(kd, cur.cp_time) < 0) 706 errx(1, "kvm_getcptime: %s", kvm_geterr(kd)); 707 } else { 708 size = sizeof(cur.cp_time); 709 mysysctl("kern.cp_time", &cur.cp_time, &size, NULL, 0); 710 if (size != sizeof(cur.cp_time)) 711 errx(1, "cp_time size mismatch"); 712 } 713 if (Pflag) { 714 size = size_cp_times; 715 mysysctl("kern.cp_times", cur_cp_times, &size, NULL, 0); 716 if (size != size_cp_times) 717 errx(1, "cp_times mismatch"); 718 } 719 720 tmp_dinfo = last.dinfo; 721 last.dinfo = cur.dinfo; 722 cur.dinfo = tmp_dinfo; 723 last.snap_time = cur.snap_time; 724 725 /* 726 * Here what we want to do is refresh our device stats. 727 * getdevs() returns 1 when the device list has changed. 728 * If the device list has changed, we want to go through 729 * the selection process again, in case a device that we 730 * were previously displaying has gone away. 731 */ 732 switch (devstat_getdevs(NULL, &cur)) { 733 case -1: 734 errx(1, "%s", devstat_errbuf); 735 break; 736 case 1: { 737 int retval; 738 739 num_devices = cur.dinfo->numdevs; 740 generation = cur.dinfo->generation; 741 742 retval = devstat_selectdevs(&dev_select, &num_selected, 743 &num_selections, &select_generation, 744 generation, cur.dinfo->devices, 745 num_devices, matches, num_matches, 746 specified_devices, 747 num_devices_specified, select_mode, 748 maxshowdevs, 0); 749 switch (retval) { 750 case -1: 751 errx(1, "%s", devstat_errbuf); 752 break; 753 case 1: 754 printhdr(ncpus, cpumask); 755 break; 756 default: 757 break; 758 } 759 } 760 default: 761 break; 762 } 763 764 fill_vmmeter(&sum); 765 fill_vmtotal(&total); 766 (void)printf("%2d %1d %1d", 767 total.t_rq - 1, total.t_dw + total.t_pw, total.t_sw); 768#define vmstat_pgtok(a) ((a) * (sum.v_page_size >> 10)) 769#define rate(x) (((x) + halfuptime) / uptime) /* round */ 770 if (hflag) { 771 printf(" "); 772 prthuman(total.t_avm * (u_int64_t)sum.v_page_size, 7); 773 printf(" "); 774 prthuman(total.t_free * (u_int64_t)sum.v_page_size, 6); 775 printf(" "); 776 } else { 777 printf(" %7d ", vmstat_pgtok(total.t_avm)); 778 printf(" %6d ", vmstat_pgtok(total.t_free)); 779 } 780 (void)printf("%5lu ", 781 (unsigned long)rate(sum.v_vm_faults - osum.v_vm_faults)); 782 (void)printf("%3lu ", 783 (unsigned long)rate(sum.v_reactivated - osum.v_reactivated)); 784 (void)printf("%3lu ", 785 (unsigned long)rate(sum.v_swapin + sum.v_vnodein - 786 (osum.v_swapin + osum.v_vnodein))); 787 (void)printf("%3lu ", 788 (unsigned long)rate(sum.v_swapout + sum.v_vnodeout - 789 (osum.v_swapout + osum.v_vnodeout))); 790 (void)printf("%5lu ", 791 (unsigned long)rate(sum.v_tfree - osum.v_tfree)); 792 (void)printf("%3lu ", 793 (unsigned long)rate(sum.v_pdpages - osum.v_pdpages)); 794 devstats(); 795 (void)printf("%4lu %4lu %4lu", 796 (unsigned long)rate(sum.v_intr - osum.v_intr), 797 (unsigned long)rate(sum.v_syscall - osum.v_syscall), 798 (unsigned long)rate(sum.v_swtch - osum.v_swtch)); 799 if (Pflag) 800 pcpustats(ncpus, cpumask, maxid); 801 else 802 cpustats(); 803 (void)printf("\n"); 804 (void)fflush(stdout); 805 if (reps >= 0 && --reps <= 0) 806 break; 807 osum = sum; 808 uptime = interval; 809 /* 810 * We round upward to avoid losing low-frequency events 811 * (i.e., >= 1 per interval but < 1 per second). 812 */ 813 if (interval != 1) 814 halfuptime = (uptime + 1) / 2; 815 else 816 halfuptime = 0; 817 (void)sleep(interval); 818 } 819} 820 821static void 822printhdr(int ncpus, u_long cpumask) 823{ 824 int i, num_shown; 825 826 num_shown = (num_selected < maxshowdevs) ? num_selected : maxshowdevs; 827 (void)printf(" procs memory page%*s", 19, ""); 828 if (num_shown > 1) 829 (void)printf(" disks %*s", num_shown * 4 - 7, ""); 830 else if (num_shown == 1) 831 (void)printf("disk"); 832 (void)printf(" faults "); 833 if (Pflag) { 834 for (i = 0; i < ncpus; i++) { 835 if (cpumask & (1ul << i)) 836 printf("cpu%-2d ", i); 837 } 838 printf("\n"); 839 } else 840 printf("cpu\n"); 841 (void)printf(" r b w avm fre flt re pi po fr sr "); 842 for (i = 0; i < num_devices; i++) 843 if ((dev_select[i].selected) 844 && (dev_select[i].selected <= maxshowdevs)) 845 (void)printf("%c%c%d ", dev_select[i].device_name[0], 846 dev_select[i].device_name[1], 847 dev_select[i].unit_number); 848 (void)printf(" in sy cs"); 849 if (Pflag) { 850 for (i = 0; i < ncpus; i++) 851 printf(" us sy id"); 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 pages affected by kernel thread creation\n", sum.v_kthreadpages); 978 (void)printf("%9u pages affected by fork()\n", sum.v_forkpages); 979 (void)printf("%9u pages affected by vfork()\n", sum.v_vforkpages); 980 (void)printf("%9u pages affected by rfork()\n", sum.v_rforkpages); 981 (void)printf("%9u pages cached\n", sum.v_tcached); 982 (void)printf("%9u pages freed\n", sum.v_tfree); 983 (void)printf("%9u pages freed by daemon\n", sum.v_dfree); 984 (void)printf("%9u pages freed by exiting processes\n", sum.v_pfree); 985 (void)printf("%9u pages active\n", sum.v_active_count); 986 (void)printf("%9u pages inactive\n", sum.v_inactive_count); 987 (void)printf("%9u pages in VM cache\n", sum.v_cache_count); 988 (void)printf("%9u pages wired down\n", sum.v_wire_count); 989 (void)printf("%9u pages free\n", sum.v_free_count); 990 (void)printf("%9u bytes per page\n", sum.v_page_size); 991 if (kd != NULL) { 992 kread(X_NCHSTATS, &lnchstats, sizeof(lnchstats)); 993 } else { 994 size_t size = sizeof(lnchstats); 995 mysysctl("vfs.cache.nchstats", &lnchstats, &size, NULL, 0); 996 if (size != sizeof(lnchstats)) 997 errx(1, "vfs.cache.nchstats size mismatch"); 998 } 999 nchtotal = lnchstats.ncs_goodhits + lnchstats.ncs_neghits + 1000 lnchstats.ncs_badhits + lnchstats.ncs_falsehits + 1001 lnchstats.ncs_miss + lnchstats.ncs_long; 1002 (void)printf("%9ld total name lookups\n", nchtotal); 1003 (void)printf( 1004 "%9s cache hits (%ld%% pos + %ld%% neg) system %ld%% per-directory\n", 1005 "", PCT(lnchstats.ncs_goodhits, nchtotal), 1006 PCT(lnchstats.ncs_neghits, nchtotal), 1007 PCT(lnchstats.ncs_pass2, nchtotal)); 1008 (void)printf("%9s deletions %ld%%, falsehits %ld%%, toolong %ld%%\n", "", 1009 PCT(lnchstats.ncs_badhits, nchtotal), 1010 PCT(lnchstats.ncs_falsehits, nchtotal), 1011 PCT(lnchstats.ncs_long, nchtotal)); 1012} 1013 1014static void 1015doforkst(void) 1016{ 1017 fill_vmmeter(&sum); 1018 (void)printf("%u forks, %u pages, average %.2f\n", 1019 sum.v_forks, sum.v_forkpages, 1020 sum.v_forks == 0 ? 0.0 : 1021 (double)sum.v_forkpages / sum.v_forks); 1022 (void)printf("%u vforks, %u pages, average %.2f\n", 1023 sum.v_vforks, sum.v_vforkpages, 1024 sum.v_vforks == 0 ? 0.0 : 1025 (double)sum.v_vforkpages / sum.v_vforks); 1026 (void)printf("%u rforks, %u pages, average %.2f\n", 1027 sum.v_rforks, sum.v_rforkpages, 1028 sum.v_rforks == 0 ? 0.0 : 1029 (double)sum.v_rforkpages / sum.v_rforks); 1030} 1031 1032static void 1033devstats(void) 1034{ 1035 int dn, state; 1036 long double transfers_per_second; 1037 long double busy_seconds; 1038 long tmp; 1039 1040 for (state = 0; state < CPUSTATES; ++state) { 1041 tmp = cur.cp_time[state]; 1042 cur.cp_time[state] -= last.cp_time[state]; 1043 last.cp_time[state] = tmp; 1044 } 1045 1046 busy_seconds = cur.snap_time - last.snap_time; 1047 1048 for (dn = 0; dn < num_devices; dn++) { 1049 int di; 1050 1051 if ((dev_select[dn].selected == 0) 1052 || (dev_select[dn].selected > maxshowdevs)) 1053 continue; 1054 1055 di = dev_select[dn].position; 1056 1057 if (devstat_compute_statistics(&cur.dinfo->devices[di], 1058 &last.dinfo->devices[di], busy_seconds, 1059 DSM_TRANSFERS_PER_SECOND, &transfers_per_second, 1060 DSM_NONE) != 0) 1061 errx(1, "%s", devstat_errbuf); 1062 1063 (void)printf("%3.0Lf ", transfers_per_second); 1064 } 1065} 1066 1067static void 1068percent(double pct, int *over) 1069{ 1070 char buf[10]; 1071 int l; 1072 1073 l = snprintf(buf, sizeof(buf), "%.0f", pct); 1074 if (l == 1 && *over) { 1075 printf("%s", buf); 1076 (*over)--; 1077 } else 1078 printf("%2s", buf); 1079 if (l > 2) 1080 (*over)++; 1081} 1082 1083static void 1084cpustats(void) 1085{ 1086 int state, over; 1087 double lpct, total; 1088 1089 total = 0; 1090 for (state = 0; state < CPUSTATES; ++state) 1091 total += cur.cp_time[state]; 1092 if (total) 1093 lpct = 100.0 / total; 1094 else 1095 lpct = 0.0; 1096 over = 0; 1097 printf(" "); 1098 percent((cur.cp_time[CP_USER] + cur.cp_time[CP_NICE]) * lpct, &over); 1099 printf(" "); 1100 percent((cur.cp_time[CP_SYS] + cur.cp_time[CP_INTR]) * lpct, &over); 1101 printf(" "); 1102 percent(cur.cp_time[CP_IDLE] * lpct, &over); 1103} 1104 1105static void 1106pcpustats(int ncpus, u_long cpumask, int maxid) 1107{ 1108 int state, i; 1109 double lpct, total; 1110 long tmp; 1111 int over; 1112 1113 /* devstats does this for cp_time */ 1114 for (i = 0; i <= maxid; i++) { 1115 if ((cpumask & (1ul << i)) == 0) 1116 continue; 1117 for (state = 0; state < CPUSTATES; ++state) { 1118 tmp = cur_cp_times[i * CPUSTATES + state]; 1119 cur_cp_times[i * CPUSTATES + state] -= last_cp_times[i * CPUSTATES + state]; 1120 last_cp_times[i * CPUSTATES + state] = tmp; 1121 } 1122 } 1123 1124 over = 0; 1125 for (i = 0; i <= maxid; i++) { 1126 if ((cpumask & (1ul << i)) == 0) 1127 continue; 1128 total = 0; 1129 for (state = 0; state < CPUSTATES; ++state) 1130 total += cur_cp_times[i * CPUSTATES + state]; 1131 if (total) 1132 lpct = 100.0 / total; 1133 else 1134 lpct = 0.0; 1135 printf(" "); 1136 percent((cur_cp_times[i * CPUSTATES + CP_USER] + 1137 cur_cp_times[i * CPUSTATES + CP_NICE]) * lpct, &over); 1138 printf(" "); 1139 percent((cur_cp_times[i * CPUSTATES + CP_SYS] + 1140 cur_cp_times[i * CPUSTATES + CP_INTR]) * lpct, &over); 1141 printf(" "); 1142 percent(cur_cp_times[i * CPUSTATES + CP_IDLE] * lpct, &over); 1143 } 1144} 1145 1146static void 1147dointr(void) 1148{ 1149 unsigned long *intrcnt, uptime; 1150 uint64_t inttotal; 1151 size_t clen, inamlen, intrcntlen, istrnamlen; 1152 unsigned int i, nintr; 1153 char *intrname, *tintrname; 1154 1155 uptime = getuptime(); 1156 if (kd != NULL) { 1157 intrcntlen = namelist[X_EINTRCNT].n_value - 1158 namelist[X_INTRCNT].n_value; 1159 inamlen = namelist[X_EINTRNAMES].n_value - 1160 namelist[X_INTRNAMES].n_value; 1161 if ((intrcnt = malloc(intrcntlen)) == NULL || 1162 (intrname = malloc(inamlen)) == NULL) 1163 err(1, "malloc()"); 1164 kread(X_INTRCNT, intrcnt, intrcntlen); 1165 kread(X_INTRNAMES, intrname, inamlen); 1166 } else { 1167 for (intrcnt = NULL, intrcntlen = 1024; ; intrcntlen *= 2) { 1168 if ((intrcnt = reallocf(intrcnt, intrcntlen)) == NULL) 1169 err(1, "reallocf()"); 1170 if (mysysctl("hw.intrcnt", 1171 intrcnt, &intrcntlen, NULL, 0) == 0) 1172 break; 1173 } 1174 for (intrname = NULL, inamlen = 1024; ; inamlen *= 2) { 1175 if ((intrname = reallocf(intrname, inamlen)) == NULL) 1176 err(1, "reallocf()"); 1177 if (mysysctl("hw.intrnames", 1178 intrname, &inamlen, NULL, 0) == 0) 1179 break; 1180 } 1181 } 1182 nintr = intrcntlen / sizeof(unsigned long); 1183 tintrname = intrname; 1184 istrnamlen = strlen("interrupt"); 1185 for (i = 0; i < nintr; i++) { 1186 clen = strlen(tintrname); 1187 if (clen > istrnamlen) 1188 istrnamlen = clen; 1189 tintrname += clen + 1; 1190 } 1191 (void)printf("%-*s %20s %10s\n", istrnamlen, "interrupt", "total", 1192 "rate"); 1193 inttotal = 0; 1194 for (i = 0; i < nintr; i++) { 1195 if (intrname[0] != '\0' && (*intrcnt != 0 || aflag)) 1196 (void)printf("%-*s %20lu %10lu\n", istrnamlen, intrname, 1197 *intrcnt, *intrcnt / uptime); 1198 intrname += strlen(intrname) + 1; 1199 inttotal += *intrcnt++; 1200 } 1201 (void)printf("%-*s %20llu %10llu\n", istrnamlen, "Total", 1202 (long long)inttotal, (long long)(inttotal / uptime)); 1203} 1204 1205static void 1206domemstat_malloc(void) 1207{ 1208 struct memory_type_list *mtlp; 1209 struct memory_type *mtp; 1210 int error, first, i; 1211 1212 mtlp = memstat_mtl_alloc(); 1213 if (mtlp == NULL) { 1214 warn("memstat_mtl_alloc"); 1215 return; 1216 } 1217 if (kd == NULL) { 1218 if (memstat_sysctl_malloc(mtlp, 0) < 0) { 1219 warnx("memstat_sysctl_malloc: %s", 1220 memstat_strerror(memstat_mtl_geterror(mtlp))); 1221 return; 1222 } 1223 } else { 1224 if (memstat_kvm_malloc(mtlp, kd) < 0) { 1225 error = memstat_mtl_geterror(mtlp); 1226 if (error == MEMSTAT_ERROR_KVM) 1227 warnx("memstat_kvm_malloc: %s", 1228 kvm_geterr(kd)); 1229 else 1230 warnx("memstat_kvm_malloc: %s", 1231 memstat_strerror(error)); 1232 } 1233 } 1234 printf("%13s %5s %6s %7s %8s Size(s)\n", "Type", "InUse", "MemUse", 1235 "HighUse", "Requests"); 1236 for (mtp = memstat_mtl_first(mtlp); mtp != NULL; 1237 mtp = memstat_mtl_next(mtp)) { 1238 if (memstat_get_numallocs(mtp) == 0 && 1239 memstat_get_count(mtp) == 0) 1240 continue; 1241 printf("%13s %5lld %5lldK %7s %8lld ", 1242 memstat_get_name(mtp), memstat_get_count(mtp), 1243 ((int64_t)memstat_get_bytes(mtp) + 1023) / 1024, "-", 1244 memstat_get_numallocs(mtp)); 1245 first = 1; 1246 for (i = 0; i < 32; i++) { 1247 if (memstat_get_sizemask(mtp) & (1 << i)) { 1248 if (!first) 1249 printf(","); 1250 printf("%d", 1 << (i + 4)); 1251 first = 0; 1252 } 1253 } 1254 printf("\n"); 1255 } 1256 memstat_mtl_free(mtlp); 1257} 1258 1259static void 1260domemstat_zone(void) 1261{ 1262 struct memory_type_list *mtlp; 1263 struct memory_type *mtp; 1264 char name[MEMTYPE_MAXNAME + 1]; 1265 int error; 1266 1267 mtlp = memstat_mtl_alloc(); 1268 if (mtlp == NULL) { 1269 warn("memstat_mtl_alloc"); 1270 return; 1271 } 1272 if (kd == NULL) { 1273 if (memstat_sysctl_uma(mtlp, 0) < 0) { 1274 warnx("memstat_sysctl_uma: %s", 1275 memstat_strerror(memstat_mtl_geterror(mtlp))); 1276 return; 1277 } 1278 } else { 1279 if (memstat_kvm_uma(mtlp, kd) < 0) { 1280 error = memstat_mtl_geterror(mtlp); 1281 if (error == MEMSTAT_ERROR_KVM) 1282 warnx("memstat_kvm_uma: %s", 1283 kvm_geterr(kd)); 1284 else 1285 warnx("memstat_kvm_uma: %s", 1286 memstat_strerror(error)); 1287 } 1288 } 1289 printf("%-20s %8s %8s %8s %8s %8s %8s\n\n", "ITEM", "SIZE", 1290 "LIMIT", "USED", "FREE", "REQUESTS", "FAILURES"); 1291 for (mtp = memstat_mtl_first(mtlp); mtp != NULL; 1292 mtp = memstat_mtl_next(mtp)) { 1293 strlcpy(name, memstat_get_name(mtp), MEMTYPE_MAXNAME); 1294 strcat(name, ":"); 1295 printf("%-20s %8llu, %8llu, %8llu, %8llu, %8llu, %8llu\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 } 1300 memstat_mtl_free(mtlp); 1301 printf("\n"); 1302} 1303 1304/* 1305 * kread reads something from the kernel, given its nlist index. 1306 */ 1307static void 1308kreado(int nlx, void *addr, size_t size, size_t offset) 1309{ 1310 const char *sym; 1311 1312 if (namelist[nlx].n_type == 0 || namelist[nlx].n_value == 0) { 1313 sym = namelist[nlx].n_name; 1314 if (*sym == '_') 1315 ++sym; 1316 errx(1, "symbol %s not defined", sym); 1317 } 1318 if ((size_t)kvm_read(kd, namelist[nlx].n_value + offset, addr, 1319 size) != size) { 1320 sym = namelist[nlx].n_name; 1321 if (*sym == '_') 1322 ++sym; 1323 errx(1, "%s: %s", sym, kvm_geterr(kd)); 1324 } 1325} 1326 1327static void 1328kread(int nlx, void *addr, size_t size) 1329{ 1330 kreado(nlx, addr, size, 0); 1331} 1332 1333static char * 1334kgetstr(const char *strp) 1335{ 1336 int n = 0, size = 1; 1337 char *ret = NULL; 1338 1339 do { 1340 if (size == n + 1) { 1341 ret = realloc(ret, size); 1342 if (ret == NULL) 1343 err(1, "%s: realloc", __func__); 1344 size *= 2; 1345 } 1346 if (kvm_read(kd, (u_long)strp + n, &ret[n], 1) != 1) 1347 errx(1, "%s: %s", __func__, kvm_geterr(kd)); 1348 } while (ret[n++] != '\0'); 1349 return (ret); 1350} 1351 1352static void 1353usage(void) 1354{ 1355 (void)fprintf(stderr, "%s%s", 1356 "usage: vmstat [-afHhimPsz] [-c count] [-M core [-N system]] [-w wait]\n", 1357 " [-n devs] [-p type,if,pass] [disks]\n"); 1358 exit(1); 1359} 1360