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 31 static 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 38 static 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 79 static char da[] = "da"; 80 81 static 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 }; 113 114 static struct statinfo cur, last; 115 static int num_devices, maxshowdevs; 116 static long generation; 117 static struct device_selection *dev_select; 118 static int num_selected; 119 static struct devstat_match *matches; 120 static int num_matches = 0; 121 static int num_devices_specified, num_selections; 122 static long select_generation; 123 static char **specified_devices; 124 static devstat_select_mode select_mode; 125 126 static struct vmmeter sum, osum; 127 128 #define VMSTAT_DEFAULT_LINES 20 /* Default number of `winlines'. */ 129 volatile sig_atomic_t wresized; /* Tty resized, when non-zero. */ 130 static int winlines = VMSTAT_DEFAULT_LINES; /* Current number of tty rows. */ 131 132 static int aflag; 133 static int nflag; 134 static int Pflag; 135 static int hflag; 136 137 static 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 146 147 static void cpustats(void); 148 static void pcpustats(int, u_long, int); 149 static void devstats(void); 150 static void doforkst(void); 151 static void dointr(void); 152 static void dosum(void); 153 static void dovmstat(unsigned int, int); 154 static void domemstat_malloc(void); 155 static void domemstat_zone(void); 156 static void kread(int, void *, size_t); 157 static void kreado(int, void *, size_t, size_t); 158 static char *kgetstr(const char *); 159 static void needhdr(int); 160 static void needresize(int); 161 static void doresize(void); 162 static void printhdr(int, u_long); 163 static void usage(void); 164 165 static long pct(long, long); 166 static long getuptime(void); 167 168 static char **getdrivedata(char **); 169 170 int 171 main(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 } 326 327 static int 328 mysysctl(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 } 338 339 static char ** 340 getdrivedata(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 } 401 402 static long 403 getuptime(void) 404 { 405 struct timespec sp; 406 407 (void)clock_gettime(CLOCK_MONOTONIC, &sp); 408 409 return(sp.tv_sec); 410 } 411 412 static void 413 fill_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 } 441 442 static void 443 free_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 } 451 452 static void 453 fill_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 } 559 560 static void 561 fill_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 */ 575 static int 576 getcpuinfo(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 } 618 619 620 static void 621 prthuman(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 } 632 633 static int hz, hdrcnt; 634 635 static long *cur_cp_times; 636 static long *last_cp_times; 637 static size_t size_cp_times; 638 639 static void 640 dovmstat(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; 653 654 /* 655 * If the user stops the program (control-Z) and then resumes it, 656 * print out the header again. 657 */ 658 (void)signal(SIGCONT, needhdr); 659 660 /* 661 * If our standard output is a tty, then install a SIGWINCH handler 662 * and set wresized so that our first iteration through the main 663 * vmstat loop will peek at the terminal's current rows to find out 664 * how many lines can fit in a screenful of output. 665 */ 666 if (isatty(fileno(stdout)) != 0) { 667 wresized = 1; 668 (void)signal(SIGWINCH, needresize); 669 } else { 670 wresized = 0; 671 winlines = VMSTAT_DEFAULT_LINES; 672 } 673 674 if (kd != NULL) { 675 if (namelist[X_STATHZ].n_type != 0 && 676 namelist[X_STATHZ].n_value != 0) 677 kread(X_STATHZ, &hz, sizeof(hz)); 678 if (!hz) 679 kread(X_HZ, &hz, sizeof(hz)); 680 } else { 681 struct clockinfo clockrate; 682 683 size = sizeof(clockrate); 684 mysysctl("kern.clockrate", &clockrate, &size, NULL, 0); 685 if (size != sizeof(clockrate)) 686 errx(1, "clockrate size mismatch"); 687 hz = clockrate.hz; 688 } 689 690 if (Pflag) { 691 ncpus = getcpuinfo(&cpumask, &maxid); 692 size_cp_times = sizeof(long) * (maxid + 1) * CPUSTATES; 693 cur_cp_times = calloc(1, size_cp_times); 694 last_cp_times = calloc(1, size_cp_times); 695 } 696 for (hdrcnt = 1;;) { 697 if (!--hdrcnt) 698 printhdr(ncpus, cpumask); 699 if (kd != NULL) { 700 if (kvm_getcptime(kd, cur.cp_time) < 0) 701 errx(1, "kvm_getcptime: %s", kvm_geterr(kd)); 702 } else { 703 size = sizeof(cur.cp_time); 704 mysysctl("kern.cp_time", &cur.cp_time, &size, NULL, 0); 705 if (size != sizeof(cur.cp_time)) 706 errx(1, "cp_time size mismatch"); 707 } 708 if (Pflag) { 709 size = size_cp_times; 710 mysysctl("kern.cp_times", cur_cp_times, &size, NULL, 0); 711 if (size != size_cp_times) 712 errx(1, "cp_times mismatch"); 713 } 714 715 tmp_dinfo = last.dinfo; 716 last.dinfo = cur.dinfo; 717 cur.dinfo = tmp_dinfo; 718 last.snap_time = cur.snap_time; 719 720 /* 721 * Here what we want to do is refresh our device stats. 722 * getdevs() returns 1 when the device list has changed. 723 * If the device list has changed, we want to go through 724 * the selection process again, in case a device that we 725 * were previously displaying has gone away. 726 */ 727 switch (devstat_getdevs(NULL, &cur)) { 728 case -1: 729 errx(1, "%s", devstat_errbuf); 730 break; 731 case 1: { 732 int retval; 733 734 num_devices = cur.dinfo->numdevs; 735 generation = cur.dinfo->generation; 736 737 retval = devstat_selectdevs(&dev_select, &num_selected, 738 &num_selections, &select_generation, 739 generation, cur.dinfo->devices, 740 num_devices, matches, num_matches, 741 specified_devices, 742 num_devices_specified, select_mode, 743 maxshowdevs, 0); 744 switch (retval) { 745 case -1: 746 errx(1, "%s", devstat_errbuf); 747 break; 748 case 1: 749 printhdr(ncpus, cpumask); 750 break; 751 default: 752 break; 753 } 754 } 755 default: 756 break; 757 } 758 759 fill_vmmeter(&sum); 760 fill_vmtotal(&total); 761 (void)printf("%2d %1d %1d", 762 total.t_rq - 1, total.t_dw + total.t_pw, total.t_sw); 763 #define vmstat_pgtok(a) ((a) * (sum.v_page_size >> 10)) 764 #define rate(x) (((x) * rate_adj + halfuptime) / uptime) /* round */ 765 if (hflag) { 766 printf(" "); 767 prthuman(total.t_avm * (u_int64_t)sum.v_page_size, 7); 768 printf(" "); 769 prthuman(total.t_free * (u_int64_t)sum.v_page_size, 6); 770 printf(" "); 771 } else { 772 printf(" %7d ", vmstat_pgtok(total.t_avm)); 773 printf(" %6d ", vmstat_pgtok(total.t_free)); 774 } 775 (void)printf("%5lu ", 776 (unsigned long)rate(sum.v_vm_faults - osum.v_vm_faults)); 777 (void)printf("%3lu ", 778 (unsigned long)rate(sum.v_reactivated - osum.v_reactivated)); 779 (void)printf("%3lu ", 780 (unsigned long)rate(sum.v_swapin + sum.v_vnodein - 781 (osum.v_swapin + osum.v_vnodein))); 782 (void)printf("%3lu ", 783 (unsigned long)rate(sum.v_swapout + sum.v_vnodeout - 784 (osum.v_swapout + osum.v_vnodeout))); 785 (void)printf("%5lu ", 786 (unsigned long)rate(sum.v_tfree - osum.v_tfree)); 787 (void)printf("%3lu ", 788 (unsigned long)rate(sum.v_pdpages - osum.v_pdpages)); 789 devstats(); 790 (void)printf("%4lu %4lu %4lu", 791 (unsigned long)rate(sum.v_intr - osum.v_intr), 792 (unsigned long)rate(sum.v_syscall - osum.v_syscall), 793 (unsigned long)rate(sum.v_swtch - osum.v_swtch)); 794 if (Pflag) 795 pcpustats(ncpus, cpumask, maxid); 796 else 797 cpustats(); 798 (void)printf("\n"); 799 (void)fflush(stdout); 800 if (reps >= 0 && --reps <= 0) 801 break; 802 osum = sum; 803 uptime = interval; 804 rate_adj = 1000; 805 /* 806 * We round upward to avoid losing low-frequency events 807 * (i.e., >= 1 per interval but < 1 per millisecond). 808 */ 809 if (interval != 1) 810 halfuptime = (uptime + 1) / 2; 811 else 812 halfuptime = 0; 813 (void)usleep(interval * 1000); 814 } 815 } 816 817 static void 818 printhdr(int ncpus, u_long cpumask) 819 { 820 int i, num_shown; 821 822 num_shown = (num_selected < maxshowdevs) ? num_selected : maxshowdevs; 823 (void)printf(" procs memory page%*s", 19, ""); 824 if (num_shown > 1) 825 (void)printf(" disks %*s", num_shown * 4 - 7, ""); 826 else if (num_shown == 1) 827 (void)printf("disk"); 828 (void)printf(" faults "); 829 if (Pflag) { 830 for (i = 0; i < ncpus; i++) { 831 if (cpumask & (1ul << i)) 832 printf("cpu%-2d ", i); 833 } 834 printf("\n"); 835 } else 836 printf("cpu\n"); 837 (void)printf(" r b w avm fre flt re pi po fr sr "); 838 for (i = 0; i < num_devices; i++) 839 if ((dev_select[i].selected) 840 && (dev_select[i].selected <= maxshowdevs)) 841 (void)printf("%c%c%d ", dev_select[i].device_name[0], 842 dev_select[i].device_name[1], 843 dev_select[i].unit_number); 844 (void)printf(" in sy cs"); 845 if (Pflag) { 846 for (i = 0; i < ncpus; i++) 847 printf(" us sy id"); 848 printf("\n"); 849 } else 850 printf(" us sy id\n"); 851 if (wresized != 0) 852 doresize(); 853 hdrcnt = winlines; 854 } 855 856 /* 857 * Force a header to be prepended to the next output. 858 */ 859 static void 860 needhdr(int dummy __unused) 861 { 862 863 hdrcnt = 1; 864 } 865 866 /* 867 * When the terminal is resized, force an update of the maximum number of rows 868 * printed between each header repetition. Then force a new header to be 869 * prepended to the next output. 870 */ 871 void 872 needresize(int signo) 873 { 874 875 wresized = 1; 876 hdrcnt = 1; 877 } 878 879 /* 880 * Update the global `winlines' count of terminal rows. 881 */ 882 void 883 doresize(void) 884 { 885 int status; 886 struct winsize w; 887 888 for (;;) { 889 status = ioctl(fileno(stdout), TIOCGWINSZ, &w); 890 if (status == -1 && errno == EINTR) 891 continue; 892 else if (status == -1) 893 err(1, "ioctl"); 894 if (w.ws_row > 3) 895 winlines = w.ws_row - 3; 896 else 897 winlines = VMSTAT_DEFAULT_LINES; 898 break; 899 } 900 901 /* 902 * Inhibit doresize() calls until we are rescheduled by SIGWINCH. 903 */ 904 wresized = 0; 905 } 906 907 #ifdef notyet 908 static void 909 dotimes(void) 910 { 911 unsigned int pgintime, rectime; 912 913 kread(X_REC, &rectime, sizeof(rectime)); 914 kread(X_PGIN, &pgintime, sizeof(pgintime)); 915 kread(X_SUM, &sum, sizeof(sum)); 916 (void)printf("%u reclaims, %u total time (usec)\n", 917 sum.v_pgrec, rectime); 918 (void)printf("average: %u usec / reclaim\n", rectime / sum.v_pgrec); 919 (void)printf("\n"); 920 (void)printf("%u page ins, %u total time (msec)\n", 921 sum.v_pgin, pgintime / 10); 922 (void)printf("average: %8.1f msec / page in\n", 923 pgintime / (sum.v_pgin * 10.0)); 924 } 925 #endif 926 927 static long 928 pct(long top, long bot) 929 { 930 long ans; 931 932 if (bot == 0) 933 return(0); 934 ans = (quad_t)top * 100 / bot; 935 return (ans); 936 } 937 938 #define PCT(top, bot) pct((long)(top), (long)(bot)) 939 940 static void 941 dosum(void) 942 { 943 struct nchstats lnchstats; 944 long nchtotal; 945 946 fill_vmmeter(&sum); 947 (void)printf("%9u cpu context switches\n", sum.v_swtch); 948 (void)printf("%9u device interrupts\n", sum.v_intr); 949 (void)printf("%9u software interrupts\n", sum.v_soft); 950 (void)printf("%9u traps\n", sum.v_trap); 951 (void)printf("%9u system calls\n", sum.v_syscall); 952 (void)printf("%9u kernel threads created\n", sum.v_kthreads); 953 (void)printf("%9u fork() calls\n", sum.v_forks); 954 (void)printf("%9u vfork() calls\n", sum.v_vforks); 955 (void)printf("%9u rfork() calls\n", sum.v_rforks); 956 (void)printf("%9u swap pager pageins\n", sum.v_swapin); 957 (void)printf("%9u swap pager pages paged in\n", sum.v_swappgsin); 958 (void)printf("%9u swap pager pageouts\n", sum.v_swapout); 959 (void)printf("%9u swap pager pages paged out\n", sum.v_swappgsout); 960 (void)printf("%9u vnode pager pageins\n", sum.v_vnodein); 961 (void)printf("%9u vnode pager pages paged in\n", sum.v_vnodepgsin); 962 (void)printf("%9u vnode pager pageouts\n", sum.v_vnodeout); 963 (void)printf("%9u vnode pager pages paged out\n", sum.v_vnodepgsout); 964 (void)printf("%9u page daemon wakeups\n", sum.v_pdwakeups); 965 (void)printf("%9u pages examined by the page daemon\n", sum.v_pdpages); 966 (void)printf("%9u pages reactivated\n", sum.v_reactivated); 967 (void)printf("%9u copy-on-write faults\n", sum.v_cow_faults); 968 (void)printf("%9u copy-on-write optimized faults\n", sum.v_cow_optim); 969 (void)printf("%9u zero fill pages zeroed\n", sum.v_zfod); 970 (void)printf("%9u zero fill pages prezeroed\n", sum.v_ozfod); 971 (void)printf("%9u intransit blocking page faults\n", sum.v_intrans); 972 (void)printf("%9u total VM faults taken\n", sum.v_vm_faults); 973 (void)printf("%9u page faults requiring I/O\n", sum.v_io_faults); 974 (void)printf("%9u pages affected by kernel thread creation\n", sum.v_kthreadpages); 975 (void)printf("%9u pages affected by fork()\n", sum.v_forkpages); 976 (void)printf("%9u pages affected by vfork()\n", sum.v_vforkpages); 977 (void)printf("%9u pages affected by rfork()\n", sum.v_rforkpages); 978 (void)printf("%9u pages cached\n", sum.v_tcached); 979 (void)printf("%9u pages freed\n", sum.v_tfree); 980 (void)printf("%9u pages freed by daemon\n", sum.v_dfree); 981 (void)printf("%9u pages freed by exiting processes\n", sum.v_pfree); 982 (void)printf("%9u pages active\n", sum.v_active_count); 983 (void)printf("%9u pages inactive\n", sum.v_inactive_count); 984 (void)printf("%9u pages in VM cache\n", sum.v_cache_count); 985 (void)printf("%9u pages wired down\n", sum.v_wire_count); 986 (void)printf("%9u pages free\n", sum.v_free_count); 987 (void)printf("%9u bytes per page\n", sum.v_page_size); 988 if (kd != NULL) { 989 kread(X_NCHSTATS, &lnchstats, sizeof(lnchstats)); 990 } else { 991 size_t size = sizeof(lnchstats); 992 mysysctl("vfs.cache.nchstats", &lnchstats, &size, NULL, 0); 993 if (size != sizeof(lnchstats)) 994 errx(1, "vfs.cache.nchstats size mismatch"); 995 } 996 nchtotal = lnchstats.ncs_goodhits + lnchstats.ncs_neghits + 997 lnchstats.ncs_badhits + lnchstats.ncs_falsehits + 998 lnchstats.ncs_miss + lnchstats.ncs_long; 999 (void)printf("%9ld total name lookups\n", nchtotal); 1000 (void)printf( 1001 "%9s cache hits (%ld%% pos + %ld%% neg) system %ld%% per-directory\n", 1002 "", PCT(lnchstats.ncs_goodhits, nchtotal), 1003 PCT(lnchstats.ncs_neghits, nchtotal), 1004 PCT(lnchstats.ncs_pass2, nchtotal)); 1005 (void)printf("%9s deletions %ld%%, falsehits %ld%%, toolong %ld%%\n", "", 1006 PCT(lnchstats.ncs_badhits, nchtotal), 1007 PCT(lnchstats.ncs_falsehits, nchtotal), 1008 PCT(lnchstats.ncs_long, nchtotal)); 1009 } 1010 1011 static void 1012 doforkst(void) 1013 { 1014 fill_vmmeter(&sum); 1015 (void)printf("%u forks, %u pages, average %.2f\n", 1016 sum.v_forks, sum.v_forkpages, 1017 sum.v_forks == 0 ? 0.0 : 1018 (double)sum.v_forkpages / sum.v_forks); 1019 (void)printf("%u vforks, %u pages, average %.2f\n", 1020 sum.v_vforks, sum.v_vforkpages, 1021 sum.v_vforks == 0 ? 0.0 : 1022 (double)sum.v_vforkpages / sum.v_vforks); 1023 (void)printf("%u rforks, %u pages, average %.2f\n", 1024 sum.v_rforks, sum.v_rforkpages, 1025 sum.v_rforks == 0 ? 0.0 : 1026 (double)sum.v_rforkpages / sum.v_rforks); 1027 } 1028 1029 static void 1030 devstats(void) 1031 { 1032 int dn, state; 1033 long double transfers_per_second; 1034 long double busy_seconds; 1035 long tmp; 1036 1037 for (state = 0; state < CPUSTATES; ++state) { 1038 tmp = cur.cp_time[state]; 1039 cur.cp_time[state] -= last.cp_time[state]; 1040 last.cp_time[state] = tmp; 1041 } 1042 1043 busy_seconds = cur.snap_time - last.snap_time; 1044 1045 for (dn = 0; dn < num_devices; dn++) { 1046 int di; 1047 1048 if ((dev_select[dn].selected == 0) 1049 || (dev_select[dn].selected > maxshowdevs)) 1050 continue; 1051 1052 di = dev_select[dn].position; 1053 1054 if (devstat_compute_statistics(&cur.dinfo->devices[di], 1055 &last.dinfo->devices[di], busy_seconds, 1056 DSM_TRANSFERS_PER_SECOND, &transfers_per_second, 1057 DSM_NONE) != 0) 1058 errx(1, "%s", devstat_errbuf); 1059 1060 (void)printf("%3.0Lf ", transfers_per_second); 1061 } 1062 } 1063 1064 static void 1065 percent(double pct, int *over) 1066 { 1067 char buf[10]; 1068 int l; 1069 1070 l = snprintf(buf, sizeof(buf), "%.0f", pct); 1071 if (l == 1 && *over) { 1072 printf("%s", buf); 1073 (*over)--; 1074 } else 1075 printf("%2s", buf); 1076 if (l > 2) 1077 (*over)++; 1078 } 1079 1080 static void 1081 cpustats(void) 1082 { 1083 int state, over; 1084 double lpct, total; 1085 1086 total = 0; 1087 for (state = 0; state < CPUSTATES; ++state) 1088 total += cur.cp_time[state]; 1089 if (total) 1090 lpct = 100.0 / total; 1091 else 1092 lpct = 0.0; 1093 over = 0; 1094 printf(" "); 1095 percent((cur.cp_time[CP_USER] + cur.cp_time[CP_NICE]) * lpct, &over); 1096 printf(" "); 1097 percent((cur.cp_time[CP_SYS] + cur.cp_time[CP_INTR]) * lpct, &over); 1098 printf(" "); 1099 percent(cur.cp_time[CP_IDLE] * lpct, &over); 1100 } 1101 1102 static void 1103 pcpustats(int ncpus, u_long cpumask, int maxid) 1104 { 1105 int state, i; 1106 double lpct, total; 1107 long tmp; 1108 int over; 1109 1110 /* devstats does this for cp_time */ 1111 for (i = 0; i <= maxid; i++) { 1112 if ((cpumask & (1ul << i)) == 0) 1113 continue; 1114 for (state = 0; state < CPUSTATES; ++state) { 1115 tmp = cur_cp_times[i * CPUSTATES + state]; 1116 cur_cp_times[i * CPUSTATES + state] -= last_cp_times[i * CPUSTATES + state]; 1117 last_cp_times[i * CPUSTATES + state] = tmp; 1118 } 1119 } 1120 1121 over = 0; 1122 for (i = 0; i <= maxid; i++) { 1123 if ((cpumask & (1ul << i)) == 0) 1124 continue; 1125 total = 0; 1126 for (state = 0; state < CPUSTATES; ++state) 1127 total += cur_cp_times[i * CPUSTATES + state]; 1128 if (total) 1129 lpct = 100.0 / total; 1130 else 1131 lpct = 0.0; 1132 printf(" "); 1133 percent((cur_cp_times[i * CPUSTATES + CP_USER] + 1134 cur_cp_times[i * CPUSTATES + CP_NICE]) * lpct, &over); 1135 printf(" "); 1136 percent((cur_cp_times[i * CPUSTATES + CP_SYS] + 1137 cur_cp_times[i * CPUSTATES + CP_INTR]) * lpct, &over); 1138 printf(" "); 1139 percent(cur_cp_times[i * CPUSTATES + CP_IDLE] * lpct, &over); 1140 } 1141 } 1142 1143 static void 1144 dointr(void) 1145 { 1146 unsigned long *intrcnt, uptime; 1147 uint64_t inttotal; 1148 size_t clen, inamlen, intrcntlen, istrnamlen; 1149 unsigned int i, nintr; 1150 char *intrname, *tintrname; 1151 1152 uptime = getuptime(); 1153 if (kd != NULL) { 1154 kread(X_SINTRCNT, &intrcntlen, sizeof(intrcntlen)); 1155 kread(X_SINTRNAMES, &inamlen, sizeof(inamlen)); 1156 if ((intrcnt = malloc(intrcntlen)) == NULL || 1157 (intrname = malloc(inamlen)) == NULL) 1158 err(1, "malloc()"); 1159 kread(X_INTRCNT, intrcnt, intrcntlen); 1160 kread(X_INTRNAMES, intrname, inamlen); 1161 } else { 1162 for (intrcnt = NULL, intrcntlen = 1024; ; intrcntlen *= 2) { 1163 if ((intrcnt = reallocf(intrcnt, intrcntlen)) == NULL) 1164 err(1, "reallocf()"); 1165 if (mysysctl("hw.intrcnt", 1166 intrcnt, &intrcntlen, NULL, 0) == 0) 1167 break; 1168 } 1169 for (intrname = NULL, inamlen = 1024; ; inamlen *= 2) { 1170 if ((intrname = reallocf(intrname, inamlen)) == NULL) 1171 err(1, "reallocf()"); 1172 if (mysysctl("hw.intrnames", 1173 intrname, &inamlen, NULL, 0) == 0) 1174 break; 1175 } 1176 } 1177 nintr = intrcntlen / sizeof(unsigned long); 1178 tintrname = intrname; 1179 istrnamlen = strlen("interrupt"); 1180 for (i = 0; i < nintr; i++) { 1181 clen = strlen(tintrname); 1182 if (clen > istrnamlen) 1183 istrnamlen = clen; 1184 tintrname += clen + 1; 1185 } 1186 (void)printf("%-*s %20s %10s\n", (int)istrnamlen, "interrupt", "total", 1187 "rate"); 1188 inttotal = 0; 1189 for (i = 0; i < nintr; i++) { 1190 if (intrname[0] != '\0' && (*intrcnt != 0 || aflag)) 1191 (void)printf("%-*s %20lu %10lu\n", (int)istrnamlen, 1192 intrname, *intrcnt, *intrcnt / uptime); 1193 intrname += strlen(intrname) + 1; 1194 inttotal += *intrcnt++; 1195 } 1196 (void)printf("%-*s %20" PRIu64 " %10" PRIu64 "\n", (int)istrnamlen, 1197 "Total", inttotal, inttotal / uptime); 1198 } 1199 1200 static void 1201 domemstat_malloc(void) 1202 { 1203 struct memory_type_list *mtlp; 1204 struct memory_type *mtp; 1205 int error, first, i; 1206 1207 mtlp = memstat_mtl_alloc(); 1208 if (mtlp == NULL) { 1209 warn("memstat_mtl_alloc"); 1210 return; 1211 } 1212 if (kd == NULL) { 1213 if (memstat_sysctl_malloc(mtlp, 0) < 0) { 1214 warnx("memstat_sysctl_malloc: %s", 1215 memstat_strerror(memstat_mtl_geterror(mtlp))); 1216 return; 1217 } 1218 } else { 1219 if (memstat_kvm_malloc(mtlp, kd) < 0) { 1220 error = memstat_mtl_geterror(mtlp); 1221 if (error == MEMSTAT_ERROR_KVM) 1222 warnx("memstat_kvm_malloc: %s", 1223 kvm_geterr(kd)); 1224 else 1225 warnx("memstat_kvm_malloc: %s", 1226 memstat_strerror(error)); 1227 } 1228 } 1229 printf("%13s %5s %6s %7s %8s Size(s)\n", "Type", "InUse", "MemUse", 1230 "HighUse", "Requests"); 1231 for (mtp = memstat_mtl_first(mtlp); mtp != NULL; 1232 mtp = memstat_mtl_next(mtp)) { 1233 if (memstat_get_numallocs(mtp) == 0 && 1234 memstat_get_count(mtp) == 0) 1235 continue; 1236 printf("%13s %5" PRIu64 " %5" PRIu64 "K %7s %8" PRIu64 " ", 1237 memstat_get_name(mtp), memstat_get_count(mtp), 1238 (memstat_get_bytes(mtp) + 1023) / 1024, "-", 1239 memstat_get_numallocs(mtp)); 1240 first = 1; 1241 for (i = 0; i < 32; i++) { 1242 if (memstat_get_sizemask(mtp) & (1 << i)) { 1243 if (!first) 1244 printf(","); 1245 printf("%d", 1 << (i + 4)); 1246 first = 0; 1247 } 1248 } 1249 printf("\n"); 1250 } 1251 memstat_mtl_free(mtlp); 1252 } 1253 1254 static void 1255 domemstat_zone(void) 1256 { 1257 struct memory_type_list *mtlp; 1258 struct memory_type *mtp; 1259 char name[MEMTYPE_MAXNAME + 1]; 1260 int error; 1261 1262 mtlp = memstat_mtl_alloc(); 1263 if (mtlp == NULL) { 1264 warn("memstat_mtl_alloc"); 1265 return; 1266 } 1267 if (kd == NULL) { 1268 if (memstat_sysctl_uma(mtlp, 0) < 0) { 1269 warnx("memstat_sysctl_uma: %s", 1270 memstat_strerror(memstat_mtl_geterror(mtlp))); 1271 return; 1272 } 1273 } else { 1274 if (memstat_kvm_uma(mtlp, kd) < 0) { 1275 error = memstat_mtl_geterror(mtlp); 1276 if (error == MEMSTAT_ERROR_KVM) 1277 warnx("memstat_kvm_uma: %s", 1278 kvm_geterr(kd)); 1279 else 1280 warnx("memstat_kvm_uma: %s", 1281 memstat_strerror(error)); 1282 } 1283 } 1284 printf("%-20s %6s %6s %8s %8s %8s %4s %4s\n\n", "ITEM", "SIZE", 1285 "LIMIT", "USED", "FREE", "REQ", "FAIL", "SLEEP"); 1286 for (mtp = memstat_mtl_first(mtlp); mtp != NULL; 1287 mtp = memstat_mtl_next(mtp)) { 1288 strlcpy(name, memstat_get_name(mtp), MEMTYPE_MAXNAME); 1289 strcat(name, ":"); 1290 printf("%-20s %6" PRIu64 ", %6" PRIu64 ",%8" PRIu64 ",%8" PRIu64 1291 ",%8" PRIu64 ",%4" PRIu64 ",%4" PRIu64 "\n", name, 1292 memstat_get_size(mtp), memstat_get_countlimit(mtp), 1293 memstat_get_count(mtp), memstat_get_free(mtp), 1294 memstat_get_numallocs(mtp), memstat_get_failures(mtp), 1295 memstat_get_sleeps(mtp)); 1296 } 1297 memstat_mtl_free(mtlp); 1298 printf("\n"); 1299 } 1300 1301 /* 1302 * kread reads something from the kernel, given its nlist index. 1303 */ 1304 static void 1305 kreado(int nlx, void *addr, size_t size, size_t offset) 1306 { 1307 const char *sym; 1308 1309 if (namelist[nlx].n_type == 0 || namelist[nlx].n_value == 0) { 1310 sym = namelist[nlx].n_name; 1311 if (*sym == '_') 1312 ++sym; 1313 errx(1, "symbol %s not defined", sym); 1314 } 1315 if ((size_t)kvm_read(kd, namelist[nlx].n_value + offset, addr, 1316 size) != size) { 1317 sym = namelist[nlx].n_name; 1318 if (*sym == '_') 1319 ++sym; 1320 errx(1, "%s: %s", sym, kvm_geterr(kd)); 1321 } 1322 } 1323 1324 static void 1325 kread(int nlx, void *addr, size_t size) 1326 { 1327 kreado(nlx, addr, size, 0); 1328 } 1329 1330 static char * 1331 kgetstr(const char *strp) 1332 { 1333 int n = 0, size = 1; 1334 char *ret = NULL; 1335 1336 do { 1337 if (size == n + 1) { 1338 ret = realloc(ret, size); 1339 if (ret == NULL) 1340 err(1, "%s: realloc", __func__); 1341 size *= 2; 1342 } 1343 if (kvm_read(kd, (u_long)strp + n, &ret[n], 1) != 1) 1344 errx(1, "%s: %s", __func__, kvm_geterr(kd)); 1345 } while (ret[n++] != '\0'); 1346 return (ret); 1347 } 1348 1349 static void 1350 usage(void) 1351 { 1352 (void)fprintf(stderr, "%s%s", 1353 "usage: vmstat [-afHhimPsz] [-c count] [-M core [-N system]] [-w wait]\n", 1354 " [-n devs] [-p type,if,pass] [disks]\n"); 1355 exit(1); 1356 } 1357