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/time.h> 47 #include <sys/proc.h> 48 #include <sys/uio.h> 49 #include <sys/namei.h> 50 #include <sys/malloc.h> 51 #include <sys/signal.h> 52 #include <sys/fcntl.h> 53 #include <sys/ioctl.h> 54 #include <sys/resource.h> 55 #include <sys/sysctl.h> 56 #include <sys/time.h> 57 #include <sys/vmmeter.h> 58 #include <sys/pcpu.h> 59 60 #include <vm/vm_param.h> 61 62 #include <ctype.h> 63 #include <devstat.h> 64 #include <err.h> 65 #include <errno.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_BOOTTIME 1 85 { "_boottime" }, 86 #define X_HZ 2 87 { "_hz" }, 88 #define X_STATHZ 3 89 { "_stathz" }, 90 #define X_NCHSTATS 4 91 { "_nchstats" }, 92 #define X_INTRNAMES 5 93 { "_intrnames" }, 94 #define X_EINTRNAMES 6 95 { "_eintrnames" }, 96 #define X_INTRCNT 7 97 { "_intrcnt" }, 98 #define X_EINTRCNT 8 99 { "_eintrcnt" }, 100 #define X_KMEMSTATS 9 101 { "_kmemstatistics" }, 102 #define X_KMEMZONES 10 103 { "_kmemzones" }, 104 #ifdef notyet 105 #define X_DEFICIT XXX 106 { "_deficit" }, 107 #define X_REC XXX 108 { "_rectime" }, 109 #define X_PGIN XXX 110 { "_pgintime" }, 111 #define X_XSTATS XXX 112 { "_xstats" }, 113 #define X_END XXX 114 #else 115 #define X_END 11 116 #endif 117 { "" }, 118 }; 119 120 static struct statinfo cur, last; 121 static int num_devices, maxshowdevs; 122 static long generation; 123 static struct device_selection *dev_select; 124 static int num_selected; 125 static struct devstat_match *matches; 126 static int num_matches = 0; 127 static int num_devices_specified, num_selections; 128 static long select_generation; 129 static char **specified_devices; 130 static devstat_select_mode select_mode; 131 132 static struct vmmeter sum, osum; 133 134 #define VMSTAT_DEFAULT_LINES 20 /* Default number of `winlines'. */ 135 volatile sig_atomic_t wresized; /* Tty resized, when non-zero. */ 136 static int winlines = VMSTAT_DEFAULT_LINES; /* Current number of tty rows. */ 137 138 static int aflag; 139 static int nflag; 140 static int Pflag; 141 static int hflag; 142 143 static kvm_t *kd; 144 145 #define FORKSTAT 0x01 146 #define INTRSTAT 0x02 147 #define MEMSTAT 0x04 148 #define SUMSTAT 0x08 149 #define TIMESTAT 0x10 150 #define VMSTAT 0x20 151 #define ZMEMSTAT 0x40 152 153 static void cpustats(void); 154 static void pcpustats(int, u_long, int); 155 static void devstats(void); 156 static void doforkst(void); 157 static void dointr(void); 158 static void dosum(void); 159 static void dovmstat(unsigned int, int); 160 static void domemstat_malloc(void); 161 static void domemstat_zone(void); 162 static void kread(int, void *, size_t); 163 static void kreado(int, void *, size_t, size_t); 164 static char *kgetstr(const char *); 165 static void needhdr(int); 166 static void needresize(int); 167 static void doresize(void); 168 static void printhdr(int, u_long); 169 static void usage(void); 170 171 static long pct(long, long); 172 static long getuptime(void); 173 174 static char **getdrivedata(char **); 175 176 int 177 main(int argc, char *argv[]) 178 { 179 int c, todo; 180 unsigned int interval; 181 float f; 182 int reps; 183 char *memf, *nlistf; 184 char errbuf[_POSIX2_LINE_MAX]; 185 186 memf = nlistf = NULL; 187 interval = reps = todo = 0; 188 maxshowdevs = 2; 189 hflag = isatty(1); 190 while ((c = getopt(argc, argv, "ac:fhHiM:mN:n:Pp:stw:z")) != -1) { 191 switch (c) { 192 case 'a': 193 aflag++; 194 break; 195 case 'c': 196 reps = atoi(optarg); 197 break; 198 case 'P': 199 Pflag++; 200 break; 201 case 'f': 202 todo |= FORKSTAT; 203 break; 204 case 'h': 205 hflag = 1; 206 break; 207 case 'H': 208 hflag = 0; 209 break; 210 case 'i': 211 todo |= INTRSTAT; 212 break; 213 case 'M': 214 memf = optarg; 215 break; 216 case 'm': 217 todo |= MEMSTAT; 218 break; 219 case 'N': 220 nlistf = optarg; 221 break; 222 case 'n': 223 nflag = 1; 224 maxshowdevs = atoi(optarg); 225 if (maxshowdevs < 0) 226 errx(1, "number of devices %d is < 0", 227 maxshowdevs); 228 break; 229 case 'p': 230 if (devstat_buildmatch(optarg, &matches, &num_matches) != 0) 231 errx(1, "%s", devstat_errbuf); 232 break; 233 case 's': 234 todo |= SUMSTAT; 235 break; 236 case 't': 237 #ifdef notyet 238 todo |= TIMESTAT; 239 #else 240 errx(EX_USAGE, "sorry, -t is not (re)implemented yet"); 241 #endif 242 break; 243 case 'w': 244 /* Convert to milliseconds. */ 245 f = atof(optarg); 246 interval = f * 1000; 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 f = atof(*argv); 302 interval = f * 1000; 303 if (*++argv) 304 reps = atoi(*argv); 305 } 306 #endif 307 308 if (interval) { 309 if (!reps) 310 reps = -1; 311 } else if (reps) 312 interval = 1 * 1000; 313 314 if (todo & FORKSTAT) 315 doforkst(); 316 if (todo & MEMSTAT) 317 domemstat_malloc(); 318 if (todo & ZMEMSTAT) 319 domemstat_zone(); 320 if (todo & SUMSTAT) 321 dosum(); 322 #ifdef notyet 323 if (todo & TIMESTAT) 324 dotimes(); 325 #endif 326 if (todo & INTRSTAT) 327 dointr(); 328 if (todo & VMSTAT) 329 dovmstat(interval, reps); 330 exit(0); 331 } 332 333 static int 334 mysysctl(const char *name, void *oldp, size_t *oldlenp, 335 void *newp, size_t newlen) 336 { 337 int error; 338 339 error = sysctlbyname(name, oldp, oldlenp, newp, newlen); 340 if (error != 0 && errno != ENOMEM) 341 err(1, "sysctl(%s)", name); 342 return (error); 343 } 344 345 static char ** 346 getdrivedata(char **argv) 347 { 348 if ((num_devices = devstat_getnumdevs(NULL)) < 0) 349 errx(1, "%s", devstat_errbuf); 350 351 cur.dinfo = (struct devinfo *)calloc(1, sizeof(struct devinfo)); 352 last.dinfo = (struct devinfo *)calloc(1, sizeof(struct devinfo)); 353 354 if (devstat_getdevs(NULL, &cur) == -1) 355 errx(1, "%s", devstat_errbuf); 356 357 num_devices = cur.dinfo->numdevs; 358 generation = cur.dinfo->generation; 359 360 specified_devices = (char **)malloc(sizeof(char *)); 361 for (num_devices_specified = 0; *argv; ++argv) { 362 if (isdigit(**argv)) 363 break; 364 num_devices_specified++; 365 specified_devices = (char **)realloc(specified_devices, 366 sizeof(char *) * 367 num_devices_specified); 368 specified_devices[num_devices_specified - 1] = *argv; 369 } 370 dev_select = NULL; 371 372 if (nflag == 0 && maxshowdevs < num_devices_specified) 373 maxshowdevs = num_devices_specified; 374 375 /* 376 * People are generally only interested in disk statistics when 377 * they're running vmstat. So, that's what we're going to give 378 * them if they don't specify anything by default. We'll also give 379 * them any other random devices in the system so that we get to 380 * maxshowdevs devices, if that many devices exist. If the user 381 * specifies devices on the command line, either through a pattern 382 * match or by naming them explicitly, we will give the user only 383 * those devices. 384 */ 385 if ((num_devices_specified == 0) && (num_matches == 0)) { 386 if (devstat_buildmatch(da, &matches, &num_matches) != 0) 387 errx(1, "%s", devstat_errbuf); 388 389 select_mode = DS_SELECT_ADD; 390 } else 391 select_mode = DS_SELECT_ONLY; 392 393 /* 394 * At this point, selectdevs will almost surely indicate that the 395 * device list has changed, so we don't look for return values of 0 396 * or 1. If we get back -1, though, there is an error. 397 */ 398 if (devstat_selectdevs(&dev_select, &num_selected, &num_selections, 399 &select_generation, generation, cur.dinfo->devices, 400 num_devices, matches, num_matches, specified_devices, 401 num_devices_specified, select_mode, 402 maxshowdevs, 0) == -1) 403 errx(1, "%s", devstat_errbuf); 404 405 return(argv); 406 } 407 408 static long 409 getuptime(void) 410 { 411 struct timespec sp; 412 413 (void)clock_gettime(CLOCK_MONOTONIC, &sp); 414 415 return(sp.tv_sec); 416 } 417 418 static void 419 fill_pcpu(struct pcpu ***pcpup, int* maxcpup) 420 { 421 struct pcpu **pcpu; 422 423 int maxcpu, i; 424 425 *pcpup = NULL; 426 427 if (kd == NULL) 428 return; 429 430 maxcpu = kvm_getmaxcpu(kd); 431 if (maxcpu < 0) 432 errx(1, "kvm_getmaxcpu: %s", kvm_geterr(kd)); 433 434 pcpu = calloc(maxcpu, sizeof(struct pcpu *)); 435 if (pcpu == NULL) 436 err(1, "calloc"); 437 438 for (i = 0; i < maxcpu; i++) { 439 pcpu[i] = kvm_getpcpu(kd, i); 440 if (pcpu[i] == (struct pcpu *)-1) 441 errx(1, "kvm_getpcpu: %s", kvm_geterr(kd)); 442 } 443 444 *maxcpup = maxcpu; 445 *pcpup = pcpu; 446 } 447 448 static void 449 free_pcpu(struct pcpu **pcpu, int maxcpu) 450 { 451 int i; 452 453 for (i = 0; i < maxcpu; i++) 454 free(pcpu[i]); 455 free(pcpu); 456 } 457 458 static void 459 fill_vmmeter(struct vmmeter *vmmp) 460 { 461 struct pcpu **pcpu; 462 int maxcpu, i; 463 464 if (kd != NULL) { 465 kread(X_SUM, vmmp, sizeof(*vmmp)); 466 fill_pcpu(&pcpu, &maxcpu); 467 for (i = 0; i < maxcpu; i++) { 468 if (pcpu[i] == NULL) 469 continue; 470 #define ADD_FROM_PCPU(i, name) \ 471 vmmp->name += pcpu[i]->pc_cnt.name 472 ADD_FROM_PCPU(i, v_swtch); 473 ADD_FROM_PCPU(i, v_trap); 474 ADD_FROM_PCPU(i, v_syscall); 475 ADD_FROM_PCPU(i, v_intr); 476 ADD_FROM_PCPU(i, v_soft); 477 ADD_FROM_PCPU(i, v_vm_faults); 478 ADD_FROM_PCPU(i, v_cow_faults); 479 ADD_FROM_PCPU(i, v_cow_optim); 480 ADD_FROM_PCPU(i, v_zfod); 481 ADD_FROM_PCPU(i, v_ozfod); 482 ADD_FROM_PCPU(i, v_swapin); 483 ADD_FROM_PCPU(i, v_swapout); 484 ADD_FROM_PCPU(i, v_swappgsin); 485 ADD_FROM_PCPU(i, v_swappgsout); 486 ADD_FROM_PCPU(i, v_vnodein); 487 ADD_FROM_PCPU(i, v_vnodeout); 488 ADD_FROM_PCPU(i, v_vnodepgsin); 489 ADD_FROM_PCPU(i, v_vnodepgsout); 490 ADD_FROM_PCPU(i, v_intrans); 491 ADD_FROM_PCPU(i, v_tfree); 492 ADD_FROM_PCPU(i, v_forks); 493 ADD_FROM_PCPU(i, v_vforks); 494 ADD_FROM_PCPU(i, v_rforks); 495 ADD_FROM_PCPU(i, v_kthreads); 496 ADD_FROM_PCPU(i, v_forkpages); 497 ADD_FROM_PCPU(i, v_vforkpages); 498 ADD_FROM_PCPU(i, v_rforkpages); 499 ADD_FROM_PCPU(i, v_kthreadpages); 500 #undef ADD_FROM_PCPU 501 } 502 free_pcpu(pcpu, maxcpu); 503 } else { 504 size_t size = sizeof(unsigned int); 505 #define GET_VM_STATS(cat, name) \ 506 mysysctl("vm.stats." #cat "." #name, &vmmp->name, &size, NULL, 0) 507 /* sys */ 508 GET_VM_STATS(sys, v_swtch); 509 GET_VM_STATS(sys, v_trap); 510 GET_VM_STATS(sys, v_syscall); 511 GET_VM_STATS(sys, v_intr); 512 GET_VM_STATS(sys, v_soft); 513 514 /* vm */ 515 GET_VM_STATS(vm, v_vm_faults); 516 GET_VM_STATS(vm, v_cow_faults); 517 GET_VM_STATS(vm, v_cow_optim); 518 GET_VM_STATS(vm, v_zfod); 519 GET_VM_STATS(vm, v_ozfod); 520 GET_VM_STATS(vm, v_swapin); 521 GET_VM_STATS(vm, v_swapout); 522 GET_VM_STATS(vm, v_swappgsin); 523 GET_VM_STATS(vm, v_swappgsout); 524 GET_VM_STATS(vm, v_vnodein); 525 GET_VM_STATS(vm, v_vnodeout); 526 GET_VM_STATS(vm, v_vnodepgsin); 527 GET_VM_STATS(vm, v_vnodepgsout); 528 GET_VM_STATS(vm, v_intrans); 529 GET_VM_STATS(vm, v_reactivated); 530 GET_VM_STATS(vm, v_pdwakeups); 531 GET_VM_STATS(vm, v_pdpages); 532 GET_VM_STATS(vm, v_tcached); 533 GET_VM_STATS(vm, v_dfree); 534 GET_VM_STATS(vm, v_pfree); 535 GET_VM_STATS(vm, v_tfree); 536 GET_VM_STATS(vm, v_page_size); 537 GET_VM_STATS(vm, v_page_count); 538 GET_VM_STATS(vm, v_free_reserved); 539 GET_VM_STATS(vm, v_free_target); 540 GET_VM_STATS(vm, v_free_min); 541 GET_VM_STATS(vm, v_free_count); 542 GET_VM_STATS(vm, v_wire_count); 543 GET_VM_STATS(vm, v_active_count); 544 GET_VM_STATS(vm, v_inactive_target); 545 GET_VM_STATS(vm, v_inactive_count); 546 GET_VM_STATS(vm, v_cache_count); 547 GET_VM_STATS(vm, v_cache_min); 548 GET_VM_STATS(vm, v_cache_max); 549 GET_VM_STATS(vm, v_pageout_free_min); 550 GET_VM_STATS(vm, v_interrupt_free_min); 551 /*GET_VM_STATS(vm, v_free_severe);*/ 552 GET_VM_STATS(vm, v_forks); 553 GET_VM_STATS(vm, v_vforks); 554 GET_VM_STATS(vm, v_rforks); 555 GET_VM_STATS(vm, v_kthreads); 556 GET_VM_STATS(vm, v_forkpages); 557 GET_VM_STATS(vm, v_vforkpages); 558 GET_VM_STATS(vm, v_rforkpages); 559 GET_VM_STATS(vm, v_kthreadpages); 560 #undef GET_VM_STATS 561 } 562 } 563 564 static void 565 fill_vmtotal(struct vmtotal *vmtp) 566 { 567 if (kd != NULL) { 568 /* XXX fill vmtp */ 569 errx(1, "not implemented"); 570 } else { 571 size_t size = sizeof(*vmtp); 572 mysysctl("vm.vmtotal", vmtp, &size, NULL, 0); 573 if (size != sizeof(*vmtp)) 574 errx(1, "vm.total size mismatch"); 575 } 576 } 577 578 /* Determine how many cpu columns, and what index they are in kern.cp_times */ 579 static int 580 getcpuinfo(u_long *maskp, int *maxidp) 581 { 582 int maxcpu; 583 int maxid; 584 int ncpus; 585 int i, j; 586 int empty; 587 size_t size; 588 long *times; 589 u_long mask; 590 591 if (kd != NULL) 592 errx(1, "not implemented"); 593 mask = 0; 594 ncpus = 0; 595 size = sizeof(maxcpu); 596 mysysctl("kern.smp.maxcpus", &maxcpu, &size, NULL, 0); 597 if (size != sizeof(maxcpu)) 598 errx(1, "sysctl kern.smp.maxcpus"); 599 size = sizeof(long) * maxcpu * CPUSTATES; 600 times = malloc(size); 601 if (times == NULL) 602 err(1, "malloc %zd bytes", size); 603 mysysctl("kern.cp_times", times, &size, NULL, 0); 604 maxid = (size / CPUSTATES / sizeof(long)) - 1; 605 for (i = 0; i <= maxid; i++) { 606 empty = 1; 607 for (j = 0; empty && j < CPUSTATES; j++) { 608 if (times[i * CPUSTATES + j] != 0) 609 empty = 0; 610 } 611 if (!empty) { 612 mask |= (1ul << i); 613 ncpus++; 614 } 615 } 616 if (maskp) 617 *maskp = mask; 618 if (maxidp) 619 *maxidp = maxid; 620 return (ncpus); 621 } 622 623 624 static void 625 prthuman(u_int64_t val, int size) 626 { 627 char buf[10]; 628 int flags; 629 630 if (size < 5 || size > 9) 631 errx(1, "doofus"); 632 flags = HN_B | HN_NOSPACE | HN_DECIMAL; 633 humanize_number(buf, size, val, "", HN_AUTOSCALE, flags); 634 printf("%*s", size, buf); 635 } 636 637 static int hz, hdrcnt; 638 639 static long *cur_cp_times; 640 static long *last_cp_times; 641 static size_t size_cp_times; 642 643 static void 644 dovmstat(unsigned int interval, int reps) 645 { 646 struct vmtotal total; 647 time_t uptime, halfuptime; 648 struct devinfo *tmp_dinfo; 649 size_t size; 650 int ncpus, maxid; 651 u_long cpumask; 652 int rate_adj; 653 654 uptime = getuptime(); 655 halfuptime = uptime / 2; 656 rate_adj = 1; 657 658 /* 659 * If the user stops the program (control-Z) and then resumes it, 660 * print out the header again. 661 */ 662 (void)signal(SIGCONT, needhdr); 663 664 /* 665 * If our standard output is a tty, then install a SIGWINCH handler 666 * and set wresized so that our first iteration through the main 667 * vmstat loop will peek at the terminal's current rows to find out 668 * how many lines can fit in a screenful of output. 669 */ 670 if (isatty(fileno(stdout)) != 0) { 671 wresized = 1; 672 (void)signal(SIGWINCH, needresize); 673 } else { 674 wresized = 0; 675 winlines = VMSTAT_DEFAULT_LINES; 676 } 677 678 if (kd != NULL) { 679 if (namelist[X_STATHZ].n_type != 0 && 680 namelist[X_STATHZ].n_value != 0) 681 kread(X_STATHZ, &hz, sizeof(hz)); 682 if (!hz) 683 kread(X_HZ, &hz, sizeof(hz)); 684 } else { 685 struct clockinfo clockrate; 686 687 size = sizeof(clockrate); 688 mysysctl("kern.clockrate", &clockrate, &size, NULL, 0); 689 if (size != sizeof(clockrate)) 690 errx(1, "clockrate size mismatch"); 691 hz = clockrate.hz; 692 } 693 694 if (Pflag) { 695 ncpus = getcpuinfo(&cpumask, &maxid); 696 size_cp_times = sizeof(long) * (maxid + 1) * CPUSTATES; 697 cur_cp_times = calloc(1, size_cp_times); 698 last_cp_times = calloc(1, size_cp_times); 699 } 700 for (hdrcnt = 1;;) { 701 if (!--hdrcnt) 702 printhdr(ncpus, cpumask); 703 if (kd != NULL) { 704 if (kvm_getcptime(kd, cur.cp_time) < 0) 705 errx(1, "kvm_getcptime: %s", kvm_geterr(kd)); 706 } else { 707 size = sizeof(cur.cp_time); 708 mysysctl("kern.cp_time", &cur.cp_time, &size, NULL, 0); 709 if (size != sizeof(cur.cp_time)) 710 errx(1, "cp_time size mismatch"); 711 } 712 if (Pflag) { 713 size = size_cp_times; 714 mysysctl("kern.cp_times", cur_cp_times, &size, NULL, 0); 715 if (size != size_cp_times) 716 errx(1, "cp_times mismatch"); 717 } 718 719 tmp_dinfo = last.dinfo; 720 last.dinfo = cur.dinfo; 721 cur.dinfo = tmp_dinfo; 722 last.snap_time = cur.snap_time; 723 724 /* 725 * Here what we want to do is refresh our device stats. 726 * getdevs() returns 1 when the device list has changed. 727 * If the device list has changed, we want to go through 728 * the selection process again, in case a device that we 729 * were previously displaying has gone away. 730 */ 731 switch (devstat_getdevs(NULL, &cur)) { 732 case -1: 733 errx(1, "%s", devstat_errbuf); 734 break; 735 case 1: { 736 int retval; 737 738 num_devices = cur.dinfo->numdevs; 739 generation = cur.dinfo->generation; 740 741 retval = devstat_selectdevs(&dev_select, &num_selected, 742 &num_selections, &select_generation, 743 generation, cur.dinfo->devices, 744 num_devices, matches, num_matches, 745 specified_devices, 746 num_devices_specified, select_mode, 747 maxshowdevs, 0); 748 switch (retval) { 749 case -1: 750 errx(1, "%s", devstat_errbuf); 751 break; 752 case 1: 753 printhdr(ncpus, cpumask); 754 break; 755 default: 756 break; 757 } 758 } 759 default: 760 break; 761 } 762 763 fill_vmmeter(&sum); 764 fill_vmtotal(&total); 765 (void)printf("%2d %1d %1d", 766 total.t_rq - 1, total.t_dw + total.t_pw, total.t_sw); 767 #define vmstat_pgtok(a) ((a) * (sum.v_page_size >> 10)) 768 #define rate(x) (((x) * rate_adj + halfuptime) / uptime) /* round */ 769 if (hflag) { 770 printf(" "); 771 prthuman(total.t_avm * (u_int64_t)sum.v_page_size, 7); 772 printf(" "); 773 prthuman(total.t_free * (u_int64_t)sum.v_page_size, 6); 774 printf(" "); 775 } else { 776 printf(" %7d ", vmstat_pgtok(total.t_avm)); 777 printf(" %6d ", vmstat_pgtok(total.t_free)); 778 } 779 (void)printf("%5lu ", 780 (unsigned long)rate(sum.v_vm_faults - osum.v_vm_faults)); 781 (void)printf("%3lu ", 782 (unsigned long)rate(sum.v_reactivated - osum.v_reactivated)); 783 (void)printf("%3lu ", 784 (unsigned long)rate(sum.v_swapin + sum.v_vnodein - 785 (osum.v_swapin + osum.v_vnodein))); 786 (void)printf("%3lu ", 787 (unsigned long)rate(sum.v_swapout + sum.v_vnodeout - 788 (osum.v_swapout + osum.v_vnodeout))); 789 (void)printf("%5lu ", 790 (unsigned long)rate(sum.v_tfree - osum.v_tfree)); 791 (void)printf("%3lu ", 792 (unsigned long)rate(sum.v_pdpages - osum.v_pdpages)); 793 devstats(); 794 (void)printf("%4lu %4lu %4lu", 795 (unsigned long)rate(sum.v_intr - osum.v_intr), 796 (unsigned long)rate(sum.v_syscall - osum.v_syscall), 797 (unsigned long)rate(sum.v_swtch - osum.v_swtch)); 798 if (Pflag) 799 pcpustats(ncpus, cpumask, maxid); 800 else 801 cpustats(); 802 (void)printf("\n"); 803 (void)fflush(stdout); 804 if (reps >= 0 && --reps <= 0) 805 break; 806 osum = sum; 807 uptime = interval; 808 rate_adj = 1000; 809 /* 810 * We round upward to avoid losing low-frequency events 811 * (i.e., >= 1 per interval but < 1 per millisecond). 812 */ 813 if (interval != 1) 814 halfuptime = (uptime + 1) / 2; 815 else 816 halfuptime = 0; 817 (void)usleep(interval * 1000); 818 } 819 } 820 821 static void 822 printhdr(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 */ 863 static void 864 needhdr(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 */ 875 void 876 needresize(int signo) 877 { 878 879 wresized = 1; 880 hdrcnt = 1; 881 } 882 883 /* 884 * Update the global `winlines' count of terminal rows. 885 */ 886 void 887 doresize(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 912 static void 913 dotimes(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 930 931 static long 932 pct(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)) 943 944 static void 945 dosum(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 1014 static void 1015 doforkst(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 1032 static void 1033 devstats(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 1067 static void 1068 percent(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 1083 static void 1084 cpustats(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 1105 static void 1106 pcpustats(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 1146 static void 1147 dointr(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 1205 static void 1206 domemstat_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 1259 static void 1260 domemstat_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 %6s %6s %8s %8s %8s %4s %4s\n\n", "ITEM", "SIZE", 1290 "LIMIT", "USED", "FREE", "REQ", "FAIL", "SLEEP"); 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 %6llu, %6llu,%8llu,%8llu,%8llu,%4llu,%4llu\n",name, 1296 memstat_get_size(mtp), memstat_get_countlimit(mtp), 1297 memstat_get_count(mtp), memstat_get_free(mtp), 1298 memstat_get_numallocs(mtp), memstat_get_failures(mtp), 1299 memstat_get_sleeps(mtp)); 1300 } 1301 memstat_mtl_free(mtlp); 1302 printf("\n"); 1303 } 1304 1305 /* 1306 * kread reads something from the kernel, given its nlist index. 1307 */ 1308 static void 1309 kreado(int nlx, void *addr, size_t size, size_t offset) 1310 { 1311 const char *sym; 1312 1313 if (namelist[nlx].n_type == 0 || namelist[nlx].n_value == 0) { 1314 sym = namelist[nlx].n_name; 1315 if (*sym == '_') 1316 ++sym; 1317 errx(1, "symbol %s not defined", sym); 1318 } 1319 if ((size_t)kvm_read(kd, namelist[nlx].n_value + offset, addr, 1320 size) != size) { 1321 sym = namelist[nlx].n_name; 1322 if (*sym == '_') 1323 ++sym; 1324 errx(1, "%s: %s", sym, kvm_geterr(kd)); 1325 } 1326 } 1327 1328 static void 1329 kread(int nlx, void *addr, size_t size) 1330 { 1331 kreado(nlx, addr, size, 0); 1332 } 1333 1334 static char * 1335 kgetstr(const char *strp) 1336 { 1337 int n = 0, size = 1; 1338 char *ret = NULL; 1339 1340 do { 1341 if (size == n + 1) { 1342 ret = realloc(ret, size); 1343 if (ret == NULL) 1344 err(1, "%s: realloc", __func__); 1345 size *= 2; 1346 } 1347 if (kvm_read(kd, (u_long)strp + n, &ret[n], 1) != 1) 1348 errx(1, "%s: %s", __func__, kvm_geterr(kd)); 1349 } while (ret[n++] != '\0'); 1350 return (ret); 1351 } 1352 1353 static void 1354 usage(void) 1355 { 1356 (void)fprintf(stderr, "%s%s", 1357 "usage: vmstat [-afHhimPsz] [-c count] [-M core [-N system]] [-w wait]\n", 1358 " [-n devs] [-p type,if,pass] [disks]\n"); 1359 exit(1); 1360 } 1361