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 <kvm.h> 66 #include <limits.h> 67 #include <memstat.h> 68 #include <nlist.h> 69 #include <paths.h> 70 #include <stdio.h> 71 #include <stdlib.h> 72 #include <string.h> 73 #include <sysexits.h> 74 #include <time.h> 75 #include <unistd.h> 76 #include <libutil.h> 77 78 static char da[] = "da"; 79 80 static struct nlist namelist[] = { 81 #define X_SUM 0 82 { "_cnt" }, 83 #define X_BOOTTIME 1 84 { "_boottime" }, 85 #define X_HZ 2 86 { "_hz" }, 87 #define X_STATHZ 3 88 { "_stathz" }, 89 #define X_NCHSTATS 4 90 { "_nchstats" }, 91 #define X_INTRNAMES 5 92 { "_intrnames" }, 93 #define X_SINTRNAMES 6 94 { "_sintrnames" }, 95 #define X_INTRCNT 7 96 { "_intrcnt" }, 97 #define X_SINTRCNT 8 98 { "_sintrcnt" }, 99 #define X_KMEMSTATS 9 100 { "_kmemstatistics" }, 101 #define X_KMEMZONES 10 102 { "_kmemzones" }, 103 #ifdef notyet 104 #define X_DEFICIT XXX 105 { "_deficit" }, 106 #define X_REC XXX 107 { "_rectime" }, 108 #define X_PGIN XXX 109 { "_pgintime" }, 110 #define X_XSTATS XXX 111 { "_xstats" }, 112 #define X_END XXX 113 #else 114 #define X_END 11 115 #endif 116 { "" }, 117 }; 118 119 static struct statinfo cur, last; 120 static int num_devices, maxshowdevs; 121 static long generation; 122 static struct device_selection *dev_select; 123 static int num_selected; 124 static struct devstat_match *matches; 125 static int num_matches = 0; 126 static int num_devices_specified, num_selections; 127 static long select_generation; 128 static char **specified_devices; 129 static devstat_select_mode select_mode; 130 131 static struct vmmeter sum, osum; 132 133 #define VMSTAT_DEFAULT_LINES 20 /* Default number of `winlines'. */ 134 volatile sig_atomic_t wresized; /* Tty resized, when non-zero. */ 135 static int winlines = VMSTAT_DEFAULT_LINES; /* Current number of tty rows. */ 136 137 static int aflag; 138 static int nflag; 139 static int Pflag; 140 static int hflag; 141 142 static kvm_t *kd; 143 144 #define FORKSTAT 0x01 145 #define INTRSTAT 0x02 146 #define MEMSTAT 0x04 147 #define SUMSTAT 0x08 148 #define TIMESTAT 0x10 149 #define VMSTAT 0x20 150 #define ZMEMSTAT 0x40 151 152 static void cpustats(void); 153 static void pcpustats(int, u_long, int); 154 static void devstats(void); 155 static void doforkst(void); 156 static void dointr(void); 157 static void dosum(void); 158 static void dovmstat(unsigned int, int); 159 static void domemstat_malloc(void); 160 static void domemstat_zone(void); 161 static void kread(int, void *, size_t); 162 static void kreado(int, void *, size_t, size_t); 163 static char *kgetstr(const char *); 164 static void needhdr(int); 165 static void needresize(int); 166 static void doresize(void); 167 static void printhdr(int, u_long); 168 static void usage(void); 169 170 static long pct(long, long); 171 static long getuptime(void); 172 173 static char **getdrivedata(char **); 174 175 int 176 main(int argc, char *argv[]) 177 { 178 int c, todo; 179 unsigned int interval; 180 float f; 181 int reps; 182 char *memf, *nlistf; 183 char errbuf[_POSIX2_LINE_MAX]; 184 185 memf = nlistf = NULL; 186 interval = reps = todo = 0; 187 maxshowdevs = 2; 188 hflag = isatty(1); 189 while ((c = getopt(argc, argv, "ac:fhHiM:mN:n:Pp:stw:z")) != -1) { 190 switch (c) { 191 case 'a': 192 aflag++; 193 break; 194 case 'c': 195 reps = atoi(optarg); 196 break; 197 case 'P': 198 Pflag++; 199 break; 200 case 'f': 201 todo |= FORKSTAT; 202 break; 203 case 'h': 204 hflag = 1; 205 break; 206 case 'H': 207 hflag = 0; 208 break; 209 case 'i': 210 todo |= INTRSTAT; 211 break; 212 case 'M': 213 memf = optarg; 214 break; 215 case 'm': 216 todo |= MEMSTAT; 217 break; 218 case 'N': 219 nlistf = optarg; 220 break; 221 case 'n': 222 nflag = 1; 223 maxshowdevs = atoi(optarg); 224 if (maxshowdevs < 0) 225 errx(1, "number of devices %d is < 0", 226 maxshowdevs); 227 break; 228 case 'p': 229 if (devstat_buildmatch(optarg, &matches, &num_matches) != 0) 230 errx(1, "%s", devstat_errbuf); 231 break; 232 case 's': 233 todo |= SUMSTAT; 234 break; 235 case 't': 236 #ifdef notyet 237 todo |= TIMESTAT; 238 #else 239 errx(EX_USAGE, "sorry, -t is not (re)implemented yet"); 240 #endif 241 break; 242 case 'w': 243 /* Convert to milliseconds. */ 244 f = atof(optarg); 245 interval = f * 1000; 246 break; 247 case 'z': 248 todo |= ZMEMSTAT; 249 break; 250 case '?': 251 default: 252 usage(); 253 } 254 } 255 argc -= optind; 256 argv += optind; 257 258 if (todo == 0) 259 todo = VMSTAT; 260 261 if (memf != NULL) { 262 kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); 263 if (kd == NULL) 264 errx(1, "kvm_openfiles: %s", errbuf); 265 } 266 267 if (kd != NULL && (c = kvm_nlist(kd, namelist)) != 0) { 268 if (c > 0) { 269 warnx("undefined symbols:"); 270 for (c = 0; 271 c < (int)(sizeof(namelist)/sizeof(namelist[0])); 272 c++) 273 if (namelist[c].n_type == 0) 274 (void)fprintf(stderr, " %s", 275 namelist[c].n_name); 276 (void)fputc('\n', stderr); 277 } else 278 warnx("kvm_nlist: %s", kvm_geterr(kd)); 279 exit(1); 280 } 281 if (kd && Pflag) 282 errx(1, "Cannot use -P with crash dumps"); 283 284 if (todo & VMSTAT) { 285 /* 286 * Make sure that the userland devstat version matches the 287 * kernel devstat version. If not, exit and print a 288 * message informing the user of his mistake. 289 */ 290 if (devstat_checkversion(NULL) < 0) 291 errx(1, "%s", devstat_errbuf); 292 293 294 argv = getdrivedata(argv); 295 } 296 297 #define BACKWARD_COMPATIBILITY 298 #ifdef BACKWARD_COMPATIBILITY 299 if (*argv) { 300 f = atof(*argv); 301 interval = f * 1000; 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 * 1000; 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 } 331 332 static int 333 mysysctl(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 } 343 344 static char ** 345 getdrivedata(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 } 406 407 static long 408 getuptime(void) 409 { 410 struct timespec sp; 411 412 (void)clock_gettime(CLOCK_MONOTONIC, &sp); 413 414 return(sp.tv_sec); 415 } 416 417 static void 418 fill_pcpu(struct pcpu ***pcpup, int* maxcpup) 419 { 420 struct pcpu **pcpu; 421 422 int maxcpu, i; 423 424 *pcpup = NULL; 425 426 if (kd == NULL) 427 return; 428 429 maxcpu = kvm_getmaxcpu(kd); 430 if (maxcpu < 0) 431 errx(1, "kvm_getmaxcpu: %s", kvm_geterr(kd)); 432 433 pcpu = calloc(maxcpu, sizeof(struct pcpu *)); 434 if (pcpu == NULL) 435 err(1, "calloc"); 436 437 for (i = 0; i < maxcpu; i++) { 438 pcpu[i] = kvm_getpcpu(kd, i); 439 if (pcpu[i] == (struct pcpu *)-1) 440 errx(1, "kvm_getpcpu: %s", kvm_geterr(kd)); 441 } 442 443 *maxcpup = maxcpu; 444 *pcpup = pcpu; 445 } 446 447 static void 448 free_pcpu(struct pcpu **pcpu, int maxcpu) 449 { 450 int i; 451 452 for (i = 0; i < maxcpu; i++) 453 free(pcpu[i]); 454 free(pcpu); 455 } 456 457 static void 458 fill_vmmeter(struct vmmeter *vmmp) 459 { 460 struct pcpu **pcpu; 461 int maxcpu, i; 462 463 if (kd != NULL) { 464 kread(X_SUM, vmmp, sizeof(*vmmp)); 465 fill_pcpu(&pcpu, &maxcpu); 466 for (i = 0; i < maxcpu; i++) { 467 if (pcpu[i] == NULL) 468 continue; 469 #define ADD_FROM_PCPU(i, name) \ 470 vmmp->name += pcpu[i]->pc_cnt.name 471 ADD_FROM_PCPU(i, v_swtch); 472 ADD_FROM_PCPU(i, v_trap); 473 ADD_FROM_PCPU(i, v_syscall); 474 ADD_FROM_PCPU(i, v_intr); 475 ADD_FROM_PCPU(i, v_soft); 476 ADD_FROM_PCPU(i, v_vm_faults); 477 ADD_FROM_PCPU(i, v_cow_faults); 478 ADD_FROM_PCPU(i, v_cow_optim); 479 ADD_FROM_PCPU(i, v_zfod); 480 ADD_FROM_PCPU(i, v_ozfod); 481 ADD_FROM_PCPU(i, v_swapin); 482 ADD_FROM_PCPU(i, v_swapout); 483 ADD_FROM_PCPU(i, v_swappgsin); 484 ADD_FROM_PCPU(i, v_swappgsout); 485 ADD_FROM_PCPU(i, v_vnodein); 486 ADD_FROM_PCPU(i, v_vnodeout); 487 ADD_FROM_PCPU(i, v_vnodepgsin); 488 ADD_FROM_PCPU(i, v_vnodepgsout); 489 ADD_FROM_PCPU(i, v_intrans); 490 ADD_FROM_PCPU(i, v_tfree); 491 ADD_FROM_PCPU(i, v_forks); 492 ADD_FROM_PCPU(i, v_vforks); 493 ADD_FROM_PCPU(i, v_rforks); 494 ADD_FROM_PCPU(i, v_kthreads); 495 ADD_FROM_PCPU(i, v_forkpages); 496 ADD_FROM_PCPU(i, v_vforkpages); 497 ADD_FROM_PCPU(i, v_rforkpages); 498 ADD_FROM_PCPU(i, v_kthreadpages); 499 #undef ADD_FROM_PCPU 500 } 501 free_pcpu(pcpu, maxcpu); 502 } else { 503 size_t size = sizeof(unsigned int); 504 #define GET_VM_STATS(cat, name) \ 505 mysysctl("vm.stats." #cat "." #name, &vmmp->name, &size, NULL, 0) 506 /* sys */ 507 GET_VM_STATS(sys, v_swtch); 508 GET_VM_STATS(sys, v_trap); 509 GET_VM_STATS(sys, v_syscall); 510 GET_VM_STATS(sys, v_intr); 511 GET_VM_STATS(sys, v_soft); 512 513 /* vm */ 514 GET_VM_STATS(vm, v_vm_faults); 515 GET_VM_STATS(vm, v_cow_faults); 516 GET_VM_STATS(vm, v_cow_optim); 517 GET_VM_STATS(vm, v_zfod); 518 GET_VM_STATS(vm, v_ozfod); 519 GET_VM_STATS(vm, v_swapin); 520 GET_VM_STATS(vm, v_swapout); 521 GET_VM_STATS(vm, v_swappgsin); 522 GET_VM_STATS(vm, v_swappgsout); 523 GET_VM_STATS(vm, v_vnodein); 524 GET_VM_STATS(vm, v_vnodeout); 525 GET_VM_STATS(vm, v_vnodepgsin); 526 GET_VM_STATS(vm, v_vnodepgsout); 527 GET_VM_STATS(vm, v_intrans); 528 GET_VM_STATS(vm, v_reactivated); 529 GET_VM_STATS(vm, v_pdwakeups); 530 GET_VM_STATS(vm, v_pdpages); 531 GET_VM_STATS(vm, v_tcached); 532 GET_VM_STATS(vm, v_dfree); 533 GET_VM_STATS(vm, v_pfree); 534 GET_VM_STATS(vm, v_tfree); 535 GET_VM_STATS(vm, v_page_size); 536 GET_VM_STATS(vm, v_page_count); 537 GET_VM_STATS(vm, v_free_reserved); 538 GET_VM_STATS(vm, v_free_target); 539 GET_VM_STATS(vm, v_free_min); 540 GET_VM_STATS(vm, v_free_count); 541 GET_VM_STATS(vm, v_wire_count); 542 GET_VM_STATS(vm, v_active_count); 543 GET_VM_STATS(vm, v_inactive_target); 544 GET_VM_STATS(vm, v_inactive_count); 545 GET_VM_STATS(vm, v_cache_count); 546 GET_VM_STATS(vm, v_cache_min); 547 GET_VM_STATS(vm, v_cache_max); 548 GET_VM_STATS(vm, v_pageout_free_min); 549 GET_VM_STATS(vm, v_interrupt_free_min); 550 /*GET_VM_STATS(vm, v_free_severe);*/ 551 GET_VM_STATS(vm, v_forks); 552 GET_VM_STATS(vm, v_vforks); 553 GET_VM_STATS(vm, v_rforks); 554 GET_VM_STATS(vm, v_kthreads); 555 GET_VM_STATS(vm, v_forkpages); 556 GET_VM_STATS(vm, v_vforkpages); 557 GET_VM_STATS(vm, v_rforkpages); 558 GET_VM_STATS(vm, v_kthreadpages); 559 #undef GET_VM_STATS 560 } 561 } 562 563 static void 564 fill_vmtotal(struct vmtotal *vmtp) 565 { 566 if (kd != NULL) { 567 /* XXX fill vmtp */ 568 errx(1, "not implemented"); 569 } else { 570 size_t size = sizeof(*vmtp); 571 mysysctl("vm.vmtotal", vmtp, &size, NULL, 0); 572 if (size != sizeof(*vmtp)) 573 errx(1, "vm.total size mismatch"); 574 } 575 } 576 577 /* Determine how many cpu columns, and what index they are in kern.cp_times */ 578 static int 579 getcpuinfo(u_long *maskp, int *maxidp) 580 { 581 int maxcpu; 582 int maxid; 583 int ncpus; 584 int i, j; 585 int empty; 586 size_t size; 587 long *times; 588 u_long mask; 589 590 if (kd != NULL) 591 errx(1, "not implemented"); 592 mask = 0; 593 ncpus = 0; 594 size = sizeof(maxcpu); 595 mysysctl("kern.smp.maxcpus", &maxcpu, &size, NULL, 0); 596 if (size != sizeof(maxcpu)) 597 errx(1, "sysctl kern.smp.maxcpus"); 598 size = sizeof(long) * maxcpu * CPUSTATES; 599 times = malloc(size); 600 if (times == NULL) 601 err(1, "malloc %zd bytes", size); 602 mysysctl("kern.cp_times", times, &size, NULL, 0); 603 maxid = (size / CPUSTATES / sizeof(long)) - 1; 604 for (i = 0; i <= maxid; i++) { 605 empty = 1; 606 for (j = 0; empty && j < CPUSTATES; j++) { 607 if (times[i * CPUSTATES + j] != 0) 608 empty = 0; 609 } 610 if (!empty) { 611 mask |= (1ul << i); 612 ncpus++; 613 } 614 } 615 if (maskp) 616 *maskp = mask; 617 if (maxidp) 618 *maxidp = maxid; 619 return (ncpus); 620 } 621 622 623 static void 624 prthuman(u_int64_t val, int size) 625 { 626 char buf[10]; 627 int flags; 628 629 if (size < 5 || size > 9) 630 errx(1, "doofus"); 631 flags = HN_B | HN_NOSPACE | HN_DECIMAL; 632 humanize_number(buf, size, val, "", HN_AUTOSCALE, flags); 633 printf("%*s", size, buf); 634 } 635 636 static int hz, hdrcnt; 637 638 static long *cur_cp_times; 639 static long *last_cp_times; 640 static size_t size_cp_times; 641 642 static void 643 dovmstat(unsigned int interval, int reps) 644 { 645 struct vmtotal total; 646 time_t uptime, halfuptime; 647 struct devinfo *tmp_dinfo; 648 size_t size; 649 int ncpus, maxid; 650 u_long cpumask; 651 int rate_adj; 652 653 uptime = getuptime(); 654 halfuptime = uptime / 2; 655 rate_adj = 1; 656 657 /* 658 * If the user stops the program (control-Z) and then resumes it, 659 * print out the header again. 660 */ 661 (void)signal(SIGCONT, needhdr); 662 663 /* 664 * If our standard output is a tty, then install a SIGWINCH handler 665 * and set wresized so that our first iteration through the main 666 * vmstat loop will peek at the terminal's current rows to find out 667 * how many lines can fit in a screenful of output. 668 */ 669 if (isatty(fileno(stdout)) != 0) { 670 wresized = 1; 671 (void)signal(SIGWINCH, needresize); 672 } else { 673 wresized = 0; 674 winlines = VMSTAT_DEFAULT_LINES; 675 } 676 677 if (kd != NULL) { 678 if (namelist[X_STATHZ].n_type != 0 && 679 namelist[X_STATHZ].n_value != 0) 680 kread(X_STATHZ, &hz, sizeof(hz)); 681 if (!hz) 682 kread(X_HZ, &hz, sizeof(hz)); 683 } else { 684 struct clockinfo clockrate; 685 686 size = sizeof(clockrate); 687 mysysctl("kern.clockrate", &clockrate, &size, NULL, 0); 688 if (size != sizeof(clockrate)) 689 errx(1, "clockrate size mismatch"); 690 hz = clockrate.hz; 691 } 692 693 if (Pflag) { 694 ncpus = getcpuinfo(&cpumask, &maxid); 695 size_cp_times = sizeof(long) * (maxid + 1) * CPUSTATES; 696 cur_cp_times = calloc(1, size_cp_times); 697 last_cp_times = calloc(1, size_cp_times); 698 } 699 for (hdrcnt = 1;;) { 700 if (!--hdrcnt) 701 printhdr(ncpus, cpumask); 702 if (kd != NULL) { 703 if (kvm_getcptime(kd, cur.cp_time) < 0) 704 errx(1, "kvm_getcptime: %s", kvm_geterr(kd)); 705 } else { 706 size = sizeof(cur.cp_time); 707 mysysctl("kern.cp_time", &cur.cp_time, &size, NULL, 0); 708 if (size != sizeof(cur.cp_time)) 709 errx(1, "cp_time size mismatch"); 710 } 711 if (Pflag) { 712 size = size_cp_times; 713 mysysctl("kern.cp_times", cur_cp_times, &size, NULL, 0); 714 if (size != size_cp_times) 715 errx(1, "cp_times mismatch"); 716 } 717 718 tmp_dinfo = last.dinfo; 719 last.dinfo = cur.dinfo; 720 cur.dinfo = tmp_dinfo; 721 last.snap_time = cur.snap_time; 722 723 /* 724 * Here what we want to do is refresh our device stats. 725 * getdevs() returns 1 when the device list has changed. 726 * If the device list has changed, we want to go through 727 * the selection process again, in case a device that we 728 * were previously displaying has gone away. 729 */ 730 switch (devstat_getdevs(NULL, &cur)) { 731 case -1: 732 errx(1, "%s", devstat_errbuf); 733 break; 734 case 1: { 735 int retval; 736 737 num_devices = cur.dinfo->numdevs; 738 generation = cur.dinfo->generation; 739 740 retval = devstat_selectdevs(&dev_select, &num_selected, 741 &num_selections, &select_generation, 742 generation, cur.dinfo->devices, 743 num_devices, matches, num_matches, 744 specified_devices, 745 num_devices_specified, select_mode, 746 maxshowdevs, 0); 747 switch (retval) { 748 case -1: 749 errx(1, "%s", devstat_errbuf); 750 break; 751 case 1: 752 printhdr(ncpus, cpumask); 753 break; 754 default: 755 break; 756 } 757 } 758 default: 759 break; 760 } 761 762 fill_vmmeter(&sum); 763 fill_vmtotal(&total); 764 (void)printf("%2d %1d %1d", 765 total.t_rq - 1, total.t_dw + total.t_pw, total.t_sw); 766 #define vmstat_pgtok(a) ((a) * (sum.v_page_size >> 10)) 767 #define rate(x) (((x) * rate_adj + halfuptime) / uptime) /* round */ 768 if (hflag) { 769 printf(" "); 770 prthuman(total.t_avm * (u_int64_t)sum.v_page_size, 7); 771 printf(" "); 772 prthuman(total.t_free * (u_int64_t)sum.v_page_size, 6); 773 printf(" "); 774 } else { 775 printf(" %7d ", vmstat_pgtok(total.t_avm)); 776 printf(" %6d ", vmstat_pgtok(total.t_free)); 777 } 778 (void)printf("%5lu ", 779 (unsigned long)rate(sum.v_vm_faults - osum.v_vm_faults)); 780 (void)printf("%3lu ", 781 (unsigned long)rate(sum.v_reactivated - osum.v_reactivated)); 782 (void)printf("%3lu ", 783 (unsigned long)rate(sum.v_swapin + sum.v_vnodein - 784 (osum.v_swapin + osum.v_vnodein))); 785 (void)printf("%3lu ", 786 (unsigned long)rate(sum.v_swapout + sum.v_vnodeout - 787 (osum.v_swapout + osum.v_vnodeout))); 788 (void)printf("%5lu ", 789 (unsigned long)rate(sum.v_tfree - osum.v_tfree)); 790 (void)printf("%3lu ", 791 (unsigned long)rate(sum.v_pdpages - osum.v_pdpages)); 792 devstats(); 793 (void)printf("%4lu %4lu %4lu", 794 (unsigned long)rate(sum.v_intr - osum.v_intr), 795 (unsigned long)rate(sum.v_syscall - osum.v_syscall), 796 (unsigned long)rate(sum.v_swtch - osum.v_swtch)); 797 if (Pflag) 798 pcpustats(ncpus, cpumask, maxid); 799 else 800 cpustats(); 801 (void)printf("\n"); 802 (void)fflush(stdout); 803 if (reps >= 0 && --reps <= 0) 804 break; 805 osum = sum; 806 uptime = interval; 807 rate_adj = 1000; 808 /* 809 * We round upward to avoid losing low-frequency events 810 * (i.e., >= 1 per interval but < 1 per millisecond). 811 */ 812 if (interval != 1) 813 halfuptime = (uptime + 1) / 2; 814 else 815 halfuptime = 0; 816 (void)usleep(interval * 1000); 817 } 818 } 819 820 static void 821 printhdr(int ncpus, u_long cpumask) 822 { 823 int i, num_shown; 824 825 num_shown = (num_selected < maxshowdevs) ? num_selected : maxshowdevs; 826 (void)printf(" procs memory page%*s", 19, ""); 827 if (num_shown > 1) 828 (void)printf(" disks %*s", num_shown * 4 - 7, ""); 829 else if (num_shown == 1) 830 (void)printf("disk"); 831 (void)printf(" faults "); 832 if (Pflag) { 833 for (i = 0; i < ncpus; i++) { 834 if (cpumask & (1ul << i)) 835 printf("cpu%-2d ", i); 836 } 837 printf("\n"); 838 } else 839 printf("cpu\n"); 840 (void)printf(" r b w avm fre flt re pi po fr sr "); 841 for (i = 0; i < num_devices; i++) 842 if ((dev_select[i].selected) 843 && (dev_select[i].selected <= maxshowdevs)) 844 (void)printf("%c%c%d ", dev_select[i].device_name[0], 845 dev_select[i].device_name[1], 846 dev_select[i].unit_number); 847 (void)printf(" in sy cs"); 848 if (Pflag) { 849 for (i = 0; i < ncpus; i++) 850 printf(" us sy id"); 851 printf("\n"); 852 } else 853 printf(" us sy id\n"); 854 if (wresized != 0) 855 doresize(); 856 hdrcnt = winlines; 857 } 858 859 /* 860 * Force a header to be prepended to the next output. 861 */ 862 static void 863 needhdr(int dummy __unused) 864 { 865 866 hdrcnt = 1; 867 } 868 869 /* 870 * When the terminal is resized, force an update of the maximum number of rows 871 * printed between each header repetition. Then force a new header to be 872 * prepended to the next output. 873 */ 874 void 875 needresize(int signo) 876 { 877 878 wresized = 1; 879 hdrcnt = 1; 880 } 881 882 /* 883 * Update the global `winlines' count of terminal rows. 884 */ 885 void 886 doresize(void) 887 { 888 int status; 889 struct winsize w; 890 891 for (;;) { 892 status = ioctl(fileno(stdout), TIOCGWINSZ, &w); 893 if (status == -1 && errno == EINTR) 894 continue; 895 else if (status == -1) 896 err(1, "ioctl"); 897 if (w.ws_row > 3) 898 winlines = w.ws_row - 3; 899 else 900 winlines = VMSTAT_DEFAULT_LINES; 901 break; 902 } 903 904 /* 905 * Inhibit doresize() calls until we are rescheduled by SIGWINCH. 906 */ 907 wresized = 0; 908 } 909 910 #ifdef notyet 911 static void 912 dotimes(void) 913 { 914 unsigned int pgintime, rectime; 915 916 kread(X_REC, &rectime, sizeof(rectime)); 917 kread(X_PGIN, &pgintime, sizeof(pgintime)); 918 kread(X_SUM, &sum, sizeof(sum)); 919 (void)printf("%u reclaims, %u total time (usec)\n", 920 sum.v_pgrec, rectime); 921 (void)printf("average: %u usec / reclaim\n", rectime / sum.v_pgrec); 922 (void)printf("\n"); 923 (void)printf("%u page ins, %u total time (msec)\n", 924 sum.v_pgin, pgintime / 10); 925 (void)printf("average: %8.1f msec / page in\n", 926 pgintime / (sum.v_pgin * 10.0)); 927 } 928 #endif 929 930 static long 931 pct(long top, long bot) 932 { 933 long ans; 934 935 if (bot == 0) 936 return(0); 937 ans = (quad_t)top * 100 / bot; 938 return (ans); 939 } 940 941 #define PCT(top, bot) pct((long)(top), (long)(bot)) 942 943 static void 944 dosum(void) 945 { 946 struct nchstats lnchstats; 947 long nchtotal; 948 949 fill_vmmeter(&sum); 950 (void)printf("%9u cpu context switches\n", sum.v_swtch); 951 (void)printf("%9u device interrupts\n", sum.v_intr); 952 (void)printf("%9u software interrupts\n", sum.v_soft); 953 (void)printf("%9u traps\n", sum.v_trap); 954 (void)printf("%9u system calls\n", sum.v_syscall); 955 (void)printf("%9u kernel threads created\n", sum.v_kthreads); 956 (void)printf("%9u fork() calls\n", sum.v_forks); 957 (void)printf("%9u vfork() calls\n", sum.v_vforks); 958 (void)printf("%9u rfork() calls\n", sum.v_rforks); 959 (void)printf("%9u swap pager pageins\n", sum.v_swapin); 960 (void)printf("%9u swap pager pages paged in\n", sum.v_swappgsin); 961 (void)printf("%9u swap pager pageouts\n", sum.v_swapout); 962 (void)printf("%9u swap pager pages paged out\n", sum.v_swappgsout); 963 (void)printf("%9u vnode pager pageins\n", sum.v_vnodein); 964 (void)printf("%9u vnode pager pages paged in\n", sum.v_vnodepgsin); 965 (void)printf("%9u vnode pager pageouts\n", sum.v_vnodeout); 966 (void)printf("%9u vnode pager pages paged out\n", sum.v_vnodepgsout); 967 (void)printf("%9u page daemon wakeups\n", sum.v_pdwakeups); 968 (void)printf("%9u pages examined by the page daemon\n", sum.v_pdpages); 969 (void)printf("%9u pages reactivated\n", sum.v_reactivated); 970 (void)printf("%9u copy-on-write faults\n", sum.v_cow_faults); 971 (void)printf("%9u copy-on-write optimized faults\n", sum.v_cow_optim); 972 (void)printf("%9u zero fill pages zeroed\n", sum.v_zfod); 973 (void)printf("%9u zero fill pages prezeroed\n", sum.v_ozfod); 974 (void)printf("%9u intransit blocking page faults\n", sum.v_intrans); 975 (void)printf("%9u total VM faults taken\n", sum.v_vm_faults); 976 (void)printf("%9u pages affected by kernel thread creation\n", sum.v_kthreadpages); 977 (void)printf("%9u pages affected by fork()\n", sum.v_forkpages); 978 (void)printf("%9u pages affected by vfork()\n", sum.v_vforkpages); 979 (void)printf("%9u pages affected by rfork()\n", sum.v_rforkpages); 980 (void)printf("%9u pages cached\n", sum.v_tcached); 981 (void)printf("%9u pages freed\n", sum.v_tfree); 982 (void)printf("%9u pages freed by daemon\n", sum.v_dfree); 983 (void)printf("%9u pages freed by exiting processes\n", sum.v_pfree); 984 (void)printf("%9u pages active\n", sum.v_active_count); 985 (void)printf("%9u pages inactive\n", sum.v_inactive_count); 986 (void)printf("%9u pages in VM cache\n", sum.v_cache_count); 987 (void)printf("%9u pages wired down\n", sum.v_wire_count); 988 (void)printf("%9u pages free\n", sum.v_free_count); 989 (void)printf("%9u bytes per page\n", sum.v_page_size); 990 if (kd != NULL) { 991 kread(X_NCHSTATS, &lnchstats, sizeof(lnchstats)); 992 } else { 993 size_t size = sizeof(lnchstats); 994 mysysctl("vfs.cache.nchstats", &lnchstats, &size, NULL, 0); 995 if (size != sizeof(lnchstats)) 996 errx(1, "vfs.cache.nchstats size mismatch"); 997 } 998 nchtotal = lnchstats.ncs_goodhits + lnchstats.ncs_neghits + 999 lnchstats.ncs_badhits + lnchstats.ncs_falsehits + 1000 lnchstats.ncs_miss + lnchstats.ncs_long; 1001 (void)printf("%9ld total name lookups\n", nchtotal); 1002 (void)printf( 1003 "%9s cache hits (%ld%% pos + %ld%% neg) system %ld%% per-directory\n", 1004 "", PCT(lnchstats.ncs_goodhits, nchtotal), 1005 PCT(lnchstats.ncs_neghits, nchtotal), 1006 PCT(lnchstats.ncs_pass2, nchtotal)); 1007 (void)printf("%9s deletions %ld%%, falsehits %ld%%, toolong %ld%%\n", "", 1008 PCT(lnchstats.ncs_badhits, nchtotal), 1009 PCT(lnchstats.ncs_falsehits, nchtotal), 1010 PCT(lnchstats.ncs_long, nchtotal)); 1011 } 1012 1013 static void 1014 doforkst(void) 1015 { 1016 fill_vmmeter(&sum); 1017 (void)printf("%u forks, %u pages, average %.2f\n", 1018 sum.v_forks, sum.v_forkpages, 1019 sum.v_forks == 0 ? 0.0 : 1020 (double)sum.v_forkpages / sum.v_forks); 1021 (void)printf("%u vforks, %u pages, average %.2f\n", 1022 sum.v_vforks, sum.v_vforkpages, 1023 sum.v_vforks == 0 ? 0.0 : 1024 (double)sum.v_vforkpages / sum.v_vforks); 1025 (void)printf("%u rforks, %u pages, average %.2f\n", 1026 sum.v_rforks, sum.v_rforkpages, 1027 sum.v_rforks == 0 ? 0.0 : 1028 (double)sum.v_rforkpages / sum.v_rforks); 1029 } 1030 1031 static void 1032 devstats(void) 1033 { 1034 int dn, state; 1035 long double transfers_per_second; 1036 long double busy_seconds; 1037 long tmp; 1038 1039 for (state = 0; state < CPUSTATES; ++state) { 1040 tmp = cur.cp_time[state]; 1041 cur.cp_time[state] -= last.cp_time[state]; 1042 last.cp_time[state] = tmp; 1043 } 1044 1045 busy_seconds = cur.snap_time - last.snap_time; 1046 1047 for (dn = 0; dn < num_devices; dn++) { 1048 int di; 1049 1050 if ((dev_select[dn].selected == 0) 1051 || (dev_select[dn].selected > maxshowdevs)) 1052 continue; 1053 1054 di = dev_select[dn].position; 1055 1056 if (devstat_compute_statistics(&cur.dinfo->devices[di], 1057 &last.dinfo->devices[di], busy_seconds, 1058 DSM_TRANSFERS_PER_SECOND, &transfers_per_second, 1059 DSM_NONE) != 0) 1060 errx(1, "%s", devstat_errbuf); 1061 1062 (void)printf("%3.0Lf ", transfers_per_second); 1063 } 1064 } 1065 1066 static void 1067 percent(double pct, int *over) 1068 { 1069 char buf[10]; 1070 int l; 1071 1072 l = snprintf(buf, sizeof(buf), "%.0f", pct); 1073 if (l == 1 && *over) { 1074 printf("%s", buf); 1075 (*over)--; 1076 } else 1077 printf("%2s", buf); 1078 if (l > 2) 1079 (*over)++; 1080 } 1081 1082 static void 1083 cpustats(void) 1084 { 1085 int state, over; 1086 double lpct, total; 1087 1088 total = 0; 1089 for (state = 0; state < CPUSTATES; ++state) 1090 total += cur.cp_time[state]; 1091 if (total) 1092 lpct = 100.0 / total; 1093 else 1094 lpct = 0.0; 1095 over = 0; 1096 printf(" "); 1097 percent((cur.cp_time[CP_USER] + cur.cp_time[CP_NICE]) * lpct, &over); 1098 printf(" "); 1099 percent((cur.cp_time[CP_SYS] + cur.cp_time[CP_INTR]) * lpct, &over); 1100 printf(" "); 1101 percent(cur.cp_time[CP_IDLE] * lpct, &over); 1102 } 1103 1104 static void 1105 pcpustats(int ncpus, u_long cpumask, int maxid) 1106 { 1107 int state, i; 1108 double lpct, total; 1109 long tmp; 1110 int over; 1111 1112 /* devstats does this for cp_time */ 1113 for (i = 0; i <= maxid; i++) { 1114 if ((cpumask & (1ul << i)) == 0) 1115 continue; 1116 for (state = 0; state < CPUSTATES; ++state) { 1117 tmp = cur_cp_times[i * CPUSTATES + state]; 1118 cur_cp_times[i * CPUSTATES + state] -= last_cp_times[i * CPUSTATES + state]; 1119 last_cp_times[i * CPUSTATES + state] = tmp; 1120 } 1121 } 1122 1123 over = 0; 1124 for (i = 0; i <= maxid; i++) { 1125 if ((cpumask & (1ul << i)) == 0) 1126 continue; 1127 total = 0; 1128 for (state = 0; state < CPUSTATES; ++state) 1129 total += cur_cp_times[i * CPUSTATES + state]; 1130 if (total) 1131 lpct = 100.0 / total; 1132 else 1133 lpct = 0.0; 1134 printf(" "); 1135 percent((cur_cp_times[i * CPUSTATES + CP_USER] + 1136 cur_cp_times[i * CPUSTATES + CP_NICE]) * lpct, &over); 1137 printf(" "); 1138 percent((cur_cp_times[i * CPUSTATES + CP_SYS] + 1139 cur_cp_times[i * CPUSTATES + CP_INTR]) * lpct, &over); 1140 printf(" "); 1141 percent(cur_cp_times[i * CPUSTATES + CP_IDLE] * lpct, &over); 1142 } 1143 } 1144 1145 static void 1146 dointr(void) 1147 { 1148 unsigned long *intrcnt, uptime; 1149 uint64_t inttotal; 1150 size_t clen, inamlen, intrcntlen, istrnamlen; 1151 unsigned int i, nintr; 1152 char *intrname, *tintrname; 1153 1154 uptime = getuptime(); 1155 if (kd != NULL) { 1156 kread(X_SINTRCNT, &intrcntlen, sizeof(intrcntlen)); 1157 kread(X_SINTRNAMES, &inamlen, sizeof(inamlen)); 1158 if ((intrcnt = malloc(intrcntlen)) == NULL || 1159 (intrname = malloc(inamlen)) == NULL) 1160 err(1, "malloc()"); 1161 kread(X_INTRCNT, intrcnt, intrcntlen); 1162 kread(X_INTRNAMES, intrname, inamlen); 1163 } else { 1164 for (intrcnt = NULL, intrcntlen = 1024; ; intrcntlen *= 2) { 1165 if ((intrcnt = reallocf(intrcnt, intrcntlen)) == NULL) 1166 err(1, "reallocf()"); 1167 if (mysysctl("hw.intrcnt", 1168 intrcnt, &intrcntlen, NULL, 0) == 0) 1169 break; 1170 } 1171 for (intrname = NULL, inamlen = 1024; ; inamlen *= 2) { 1172 if ((intrname = reallocf(intrname, inamlen)) == NULL) 1173 err(1, "reallocf()"); 1174 if (mysysctl("hw.intrnames", 1175 intrname, &inamlen, NULL, 0) == 0) 1176 break; 1177 } 1178 } 1179 nintr = intrcntlen / sizeof(unsigned long); 1180 tintrname = intrname; 1181 istrnamlen = strlen("interrupt"); 1182 for (i = 0; i < nintr; i++) { 1183 clen = strlen(tintrname); 1184 if (clen > istrnamlen) 1185 istrnamlen = clen; 1186 tintrname += clen + 1; 1187 } 1188 (void)printf("%-*s %20s %10s\n", istrnamlen, "interrupt", "total", 1189 "rate"); 1190 inttotal = 0; 1191 for (i = 0; i < nintr; i++) { 1192 if (intrname[0] != '\0' && (*intrcnt != 0 || aflag)) 1193 (void)printf("%-*s %20lu %10lu\n", istrnamlen, intrname, 1194 *intrcnt, *intrcnt / uptime); 1195 intrname += strlen(intrname) + 1; 1196 inttotal += *intrcnt++; 1197 } 1198 (void)printf("%-*s %20llu %10llu\n", istrnamlen, "Total", 1199 (long long)inttotal, (long long)(inttotal / uptime)); 1200 } 1201 1202 static void 1203 domemstat_malloc(void) 1204 { 1205 struct memory_type_list *mtlp; 1206 struct memory_type *mtp; 1207 int error, first, i; 1208 1209 mtlp = memstat_mtl_alloc(); 1210 if (mtlp == NULL) { 1211 warn("memstat_mtl_alloc"); 1212 return; 1213 } 1214 if (kd == NULL) { 1215 if (memstat_sysctl_malloc(mtlp, 0) < 0) { 1216 warnx("memstat_sysctl_malloc: %s", 1217 memstat_strerror(memstat_mtl_geterror(mtlp))); 1218 return; 1219 } 1220 } else { 1221 if (memstat_kvm_malloc(mtlp, kd) < 0) { 1222 error = memstat_mtl_geterror(mtlp); 1223 if (error == MEMSTAT_ERROR_KVM) 1224 warnx("memstat_kvm_malloc: %s", 1225 kvm_geterr(kd)); 1226 else 1227 warnx("memstat_kvm_malloc: %s", 1228 memstat_strerror(error)); 1229 } 1230 } 1231 printf("%13s %5s %6s %7s %8s Size(s)\n", "Type", "InUse", "MemUse", 1232 "HighUse", "Requests"); 1233 for (mtp = memstat_mtl_first(mtlp); mtp != NULL; 1234 mtp = memstat_mtl_next(mtp)) { 1235 if (memstat_get_numallocs(mtp) == 0 && 1236 memstat_get_count(mtp) == 0) 1237 continue; 1238 printf("%13s %5lld %5lldK %7s %8lld ", 1239 memstat_get_name(mtp), memstat_get_count(mtp), 1240 ((int64_t)memstat_get_bytes(mtp) + 1023) / 1024, "-", 1241 memstat_get_numallocs(mtp)); 1242 first = 1; 1243 for (i = 0; i < 32; i++) { 1244 if (memstat_get_sizemask(mtp) & (1 << i)) { 1245 if (!first) 1246 printf(","); 1247 printf("%d", 1 << (i + 4)); 1248 first = 0; 1249 } 1250 } 1251 printf("\n"); 1252 } 1253 memstat_mtl_free(mtlp); 1254 } 1255 1256 static void 1257 domemstat_zone(void) 1258 { 1259 struct memory_type_list *mtlp; 1260 struct memory_type *mtp; 1261 char name[MEMTYPE_MAXNAME + 1]; 1262 int error; 1263 1264 mtlp = memstat_mtl_alloc(); 1265 if (mtlp == NULL) { 1266 warn("memstat_mtl_alloc"); 1267 return; 1268 } 1269 if (kd == NULL) { 1270 if (memstat_sysctl_uma(mtlp, 0) < 0) { 1271 warnx("memstat_sysctl_uma: %s", 1272 memstat_strerror(memstat_mtl_geterror(mtlp))); 1273 return; 1274 } 1275 } else { 1276 if (memstat_kvm_uma(mtlp, kd) < 0) { 1277 error = memstat_mtl_geterror(mtlp); 1278 if (error == MEMSTAT_ERROR_KVM) 1279 warnx("memstat_kvm_uma: %s", 1280 kvm_geterr(kd)); 1281 else 1282 warnx("memstat_kvm_uma: %s", 1283 memstat_strerror(error)); 1284 } 1285 } 1286 printf("%-20s %6s %6s %8s %8s %8s %4s %4s\n\n", "ITEM", "SIZE", 1287 "LIMIT", "USED", "FREE", "REQ", "FAIL", "SLEEP"); 1288 for (mtp = memstat_mtl_first(mtlp); mtp != NULL; 1289 mtp = memstat_mtl_next(mtp)) { 1290 strlcpy(name, memstat_get_name(mtp), MEMTYPE_MAXNAME); 1291 strcat(name, ":"); 1292 printf("%-20s %6llu, %6llu,%8llu,%8llu,%8llu,%4llu,%4llu\n",name, 1293 memstat_get_size(mtp), memstat_get_countlimit(mtp), 1294 memstat_get_count(mtp), memstat_get_free(mtp), 1295 memstat_get_numallocs(mtp), memstat_get_failures(mtp), 1296 memstat_get_sleeps(mtp)); 1297 } 1298 memstat_mtl_free(mtlp); 1299 printf("\n"); 1300 } 1301 1302 /* 1303 * kread reads something from the kernel, given its nlist index. 1304 */ 1305 static void 1306 kreado(int nlx, void *addr, size_t size, size_t offset) 1307 { 1308 const char *sym; 1309 1310 if (namelist[nlx].n_type == 0 || namelist[nlx].n_value == 0) { 1311 sym = namelist[nlx].n_name; 1312 if (*sym == '_') 1313 ++sym; 1314 errx(1, "symbol %s not defined", sym); 1315 } 1316 if ((size_t)kvm_read(kd, namelist[nlx].n_value + offset, addr, 1317 size) != size) { 1318 sym = namelist[nlx].n_name; 1319 if (*sym == '_') 1320 ++sym; 1321 errx(1, "%s: %s", sym, kvm_geterr(kd)); 1322 } 1323 } 1324 1325 static void 1326 kread(int nlx, void *addr, size_t size) 1327 { 1328 kreado(nlx, addr, size, 0); 1329 } 1330 1331 static char * 1332 kgetstr(const char *strp) 1333 { 1334 int n = 0, size = 1; 1335 char *ret = NULL; 1336 1337 do { 1338 if (size == n + 1) { 1339 ret = realloc(ret, size); 1340 if (ret == NULL) 1341 err(1, "%s: realloc", __func__); 1342 size *= 2; 1343 } 1344 if (kvm_read(kd, (u_long)strp + n, &ret[n], 1) != 1) 1345 errx(1, "%s: %s", __func__, kvm_geterr(kd)); 1346 } while (ret[n++] != '\0'); 1347 return (ret); 1348 } 1349 1350 static void 1351 usage(void) 1352 { 1353 (void)fprintf(stderr, "%s%s", 1354 "usage: vmstat [-afHhimPsz] [-c count] [-M core [-N system]] [-w wait]\n", 1355 " [-n devs] [-p type,if,pass] [disks]\n"); 1356 exit(1); 1357 } 1358