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 time_t uptime; 413 414 (void)clock_gettime(CLOCK_MONOTONIC, &sp); 415 uptime = sp.tv_sec; 416 if (uptime <= 0 || uptime > 60*60*24*365*10) 417 errx(1, "time makes no sense; namelist must be wrong"); 418 419 return(uptime); 420 } 421 422 static void 423 fill_pcpu(struct pcpu ***pcpup, int* maxcpup) 424 { 425 struct pcpu **pcpu; 426 427 int maxcpu, i; 428 429 *pcpup = NULL; 430 431 if (kd == NULL) 432 return; 433 434 maxcpu = kvm_getmaxcpu(kd); 435 if (maxcpu < 0) 436 errx(1, "kvm_getmaxcpu: %s", kvm_geterr(kd)); 437 438 pcpu = calloc(maxcpu, sizeof(struct pcpu *)); 439 if (pcpu == NULL) 440 err(1, "calloc"); 441 442 for (i = 0; i < maxcpu; i++) { 443 pcpu[i] = kvm_getpcpu(kd, i); 444 if (pcpu[i] == (struct pcpu *)-1) 445 errx(1, "kvm_getpcpu: %s", kvm_geterr(kd)); 446 } 447 448 *maxcpup = maxcpu; 449 *pcpup = pcpu; 450 } 451 452 static void 453 free_pcpu(struct pcpu **pcpu, int maxcpu) 454 { 455 int i; 456 457 for (i = 0; i < maxcpu; i++) 458 free(pcpu[i]); 459 free(pcpu); 460 } 461 462 static void 463 fill_vmmeter(struct vmmeter *vmmp) 464 { 465 struct pcpu **pcpu; 466 int maxcpu, i; 467 468 if (kd != NULL) { 469 kread(X_SUM, vmmp, sizeof(*vmmp)); 470 fill_pcpu(&pcpu, &maxcpu); 471 for (i = 0; i < maxcpu; i++) { 472 if (pcpu[i] == NULL) 473 continue; 474 #define ADD_FROM_PCPU(i, name) \ 475 vmmp->name += pcpu[i]->pc_cnt.name 476 ADD_FROM_PCPU(i, v_swtch); 477 ADD_FROM_PCPU(i, v_trap); 478 ADD_FROM_PCPU(i, v_syscall); 479 ADD_FROM_PCPU(i, v_intr); 480 ADD_FROM_PCPU(i, v_soft); 481 ADD_FROM_PCPU(i, v_vm_faults); 482 ADD_FROM_PCPU(i, v_cow_faults); 483 ADD_FROM_PCPU(i, v_cow_optim); 484 ADD_FROM_PCPU(i, v_zfod); 485 ADD_FROM_PCPU(i, v_ozfod); 486 ADD_FROM_PCPU(i, v_swapin); 487 ADD_FROM_PCPU(i, v_swapout); 488 ADD_FROM_PCPU(i, v_swappgsin); 489 ADD_FROM_PCPU(i, v_swappgsout); 490 ADD_FROM_PCPU(i, v_vnodein); 491 ADD_FROM_PCPU(i, v_vnodeout); 492 ADD_FROM_PCPU(i, v_vnodepgsin); 493 ADD_FROM_PCPU(i, v_vnodepgsout); 494 ADD_FROM_PCPU(i, v_intrans); 495 ADD_FROM_PCPU(i, v_tfree); 496 ADD_FROM_PCPU(i, v_forks); 497 ADD_FROM_PCPU(i, v_vforks); 498 ADD_FROM_PCPU(i, v_rforks); 499 ADD_FROM_PCPU(i, v_kthreads); 500 ADD_FROM_PCPU(i, v_forkpages); 501 ADD_FROM_PCPU(i, v_vforkpages); 502 ADD_FROM_PCPU(i, v_rforkpages); 503 ADD_FROM_PCPU(i, v_kthreadpages); 504 #undef ADD_FROM_PCPU 505 } 506 free_pcpu(pcpu, maxcpu); 507 } else { 508 size_t size = sizeof(unsigned int); 509 #define GET_VM_STATS(cat, name) \ 510 mysysctl("vm.stats." #cat "." #name, &vmmp->name, &size, NULL, 0) 511 /* sys */ 512 GET_VM_STATS(sys, v_swtch); 513 GET_VM_STATS(sys, v_trap); 514 GET_VM_STATS(sys, v_syscall); 515 GET_VM_STATS(sys, v_intr); 516 GET_VM_STATS(sys, v_soft); 517 518 /* vm */ 519 GET_VM_STATS(vm, v_vm_faults); 520 GET_VM_STATS(vm, v_cow_faults); 521 GET_VM_STATS(vm, v_cow_optim); 522 GET_VM_STATS(vm, v_zfod); 523 GET_VM_STATS(vm, v_ozfod); 524 GET_VM_STATS(vm, v_swapin); 525 GET_VM_STATS(vm, v_swapout); 526 GET_VM_STATS(vm, v_swappgsin); 527 GET_VM_STATS(vm, v_swappgsout); 528 GET_VM_STATS(vm, v_vnodein); 529 GET_VM_STATS(vm, v_vnodeout); 530 GET_VM_STATS(vm, v_vnodepgsin); 531 GET_VM_STATS(vm, v_vnodepgsout); 532 GET_VM_STATS(vm, v_intrans); 533 GET_VM_STATS(vm, v_reactivated); 534 GET_VM_STATS(vm, v_pdwakeups); 535 GET_VM_STATS(vm, v_pdpages); 536 GET_VM_STATS(vm, v_tcached); 537 GET_VM_STATS(vm, v_dfree); 538 GET_VM_STATS(vm, v_pfree); 539 GET_VM_STATS(vm, v_tfree); 540 GET_VM_STATS(vm, v_page_size); 541 GET_VM_STATS(vm, v_page_count); 542 GET_VM_STATS(vm, v_free_reserved); 543 GET_VM_STATS(vm, v_free_target); 544 GET_VM_STATS(vm, v_free_min); 545 GET_VM_STATS(vm, v_free_count); 546 GET_VM_STATS(vm, v_wire_count); 547 GET_VM_STATS(vm, v_active_count); 548 GET_VM_STATS(vm, v_inactive_target); 549 GET_VM_STATS(vm, v_inactive_count); 550 GET_VM_STATS(vm, v_cache_count); 551 GET_VM_STATS(vm, v_cache_min); 552 GET_VM_STATS(vm, v_cache_max); 553 GET_VM_STATS(vm, v_pageout_free_min); 554 GET_VM_STATS(vm, v_interrupt_free_min); 555 /*GET_VM_STATS(vm, v_free_severe);*/ 556 GET_VM_STATS(vm, v_forks); 557 GET_VM_STATS(vm, v_vforks); 558 GET_VM_STATS(vm, v_rforks); 559 GET_VM_STATS(vm, v_kthreads); 560 GET_VM_STATS(vm, v_forkpages); 561 GET_VM_STATS(vm, v_vforkpages); 562 GET_VM_STATS(vm, v_rforkpages); 563 GET_VM_STATS(vm, v_kthreadpages); 564 #undef GET_VM_STATS 565 } 566 } 567 568 static void 569 fill_vmtotal(struct vmtotal *vmtp) 570 { 571 if (kd != NULL) { 572 /* XXX fill vmtp */ 573 errx(1, "not implemented"); 574 } else { 575 size_t size = sizeof(*vmtp); 576 mysysctl("vm.vmtotal", vmtp, &size, NULL, 0); 577 if (size != sizeof(*vmtp)) 578 errx(1, "vm.total size mismatch"); 579 } 580 } 581 582 /* Determine how many cpu columns, and what index they are in kern.cp_times */ 583 static int 584 getcpuinfo(u_long *maskp, int *maxidp) 585 { 586 int maxcpu; 587 int maxid; 588 int ncpus; 589 int i, j; 590 int empty; 591 size_t size; 592 long *times; 593 u_long mask; 594 595 if (kd != NULL) 596 errx(1, "not implemented"); 597 mask = 0; 598 ncpus = 0; 599 size = sizeof(maxcpu); 600 mysysctl("kern.smp.maxcpus", &maxcpu, &size, NULL, 0); 601 if (size != sizeof(maxcpu)) 602 errx(1, "sysctl kern.smp.maxcpus"); 603 size = sizeof(long) * maxcpu * CPUSTATES; 604 times = malloc(size); 605 if (times == NULL) 606 err(1, "malloc %zd bytes", size); 607 mysysctl("kern.cp_times", times, &size, NULL, 0); 608 maxid = (size / CPUSTATES / sizeof(long)) - 1; 609 for (i = 0; i <= maxid; i++) { 610 empty = 1; 611 for (j = 0; empty && j < CPUSTATES; j++) { 612 if (times[i * CPUSTATES + j] != 0) 613 empty = 0; 614 } 615 if (!empty) { 616 mask |= (1ul << i); 617 ncpus++; 618 } 619 } 620 if (maskp) 621 *maskp = mask; 622 if (maxidp) 623 *maxidp = maxid; 624 return (ncpus); 625 } 626 627 628 static void 629 prthuman(u_int64_t val, int size) 630 { 631 char buf[10]; 632 int flags; 633 634 if (size < 5 || size > 9) 635 errx(1, "doofus"); 636 flags = HN_B | HN_NOSPACE | HN_DECIMAL; 637 humanize_number(buf, size, val, "", HN_AUTOSCALE, flags); 638 printf("%*s", size, buf); 639 } 640 641 static int hz, hdrcnt; 642 643 static long *cur_cp_times; 644 static long *last_cp_times; 645 static size_t size_cp_times; 646 647 static void 648 dovmstat(unsigned int interval, int reps) 649 { 650 struct vmtotal total; 651 time_t uptime, halfuptime; 652 struct devinfo *tmp_dinfo; 653 size_t size; 654 int ncpus, maxid; 655 u_long cpumask; 656 int rate_adj; 657 658 uptime = getuptime(); 659 halfuptime = uptime / 2; 660 rate_adj = 1; 661 662 /* 663 * If the user stops the program (control-Z) and then resumes it, 664 * print out the header again. 665 */ 666 (void)signal(SIGCONT, needhdr); 667 668 /* 669 * If our standard output is a tty, then install a SIGWINCH handler 670 * and set wresized so that our first iteration through the main 671 * vmstat loop will peek at the terminal's current rows to find out 672 * how many lines can fit in a screenful of output. 673 */ 674 if (isatty(fileno(stdout)) != 0) { 675 wresized = 1; 676 (void)signal(SIGWINCH, needresize); 677 } else { 678 wresized = 0; 679 winlines = VMSTAT_DEFAULT_LINES; 680 } 681 682 if (kd != NULL) { 683 if (namelist[X_STATHZ].n_type != 0 && 684 namelist[X_STATHZ].n_value != 0) 685 kread(X_STATHZ, &hz, sizeof(hz)); 686 if (!hz) 687 kread(X_HZ, &hz, sizeof(hz)); 688 } else { 689 struct clockinfo clockrate; 690 691 size = sizeof(clockrate); 692 mysysctl("kern.clockrate", &clockrate, &size, NULL, 0); 693 if (size != sizeof(clockrate)) 694 errx(1, "clockrate size mismatch"); 695 hz = clockrate.hz; 696 } 697 698 if (Pflag) { 699 ncpus = getcpuinfo(&cpumask, &maxid); 700 size_cp_times = sizeof(long) * (maxid + 1) * CPUSTATES; 701 cur_cp_times = calloc(1, size_cp_times); 702 last_cp_times = calloc(1, size_cp_times); 703 } 704 for (hdrcnt = 1;;) { 705 if (!--hdrcnt) 706 printhdr(ncpus, cpumask); 707 if (kd != NULL) { 708 if (kvm_getcptime(kd, cur.cp_time) < 0) 709 errx(1, "kvm_getcptime: %s", kvm_geterr(kd)); 710 } else { 711 size = sizeof(cur.cp_time); 712 mysysctl("kern.cp_time", &cur.cp_time, &size, NULL, 0); 713 if (size != sizeof(cur.cp_time)) 714 errx(1, "cp_time size mismatch"); 715 } 716 if (Pflag) { 717 size = size_cp_times; 718 mysysctl("kern.cp_times", cur_cp_times, &size, NULL, 0); 719 if (size != size_cp_times) 720 errx(1, "cp_times mismatch"); 721 } 722 723 tmp_dinfo = last.dinfo; 724 last.dinfo = cur.dinfo; 725 cur.dinfo = tmp_dinfo; 726 last.snap_time = cur.snap_time; 727 728 /* 729 * Here what we want to do is refresh our device stats. 730 * getdevs() returns 1 when the device list has changed. 731 * If the device list has changed, we want to go through 732 * the selection process again, in case a device that we 733 * were previously displaying has gone away. 734 */ 735 switch (devstat_getdevs(NULL, &cur)) { 736 case -1: 737 errx(1, "%s", devstat_errbuf); 738 break; 739 case 1: { 740 int retval; 741 742 num_devices = cur.dinfo->numdevs; 743 generation = cur.dinfo->generation; 744 745 retval = devstat_selectdevs(&dev_select, &num_selected, 746 &num_selections, &select_generation, 747 generation, cur.dinfo->devices, 748 num_devices, matches, num_matches, 749 specified_devices, 750 num_devices_specified, select_mode, 751 maxshowdevs, 0); 752 switch (retval) { 753 case -1: 754 errx(1, "%s", devstat_errbuf); 755 break; 756 case 1: 757 printhdr(ncpus, cpumask); 758 break; 759 default: 760 break; 761 } 762 } 763 default: 764 break; 765 } 766 767 fill_vmmeter(&sum); 768 fill_vmtotal(&total); 769 (void)printf("%2d %1d %1d", 770 total.t_rq - 1, total.t_dw + total.t_pw, total.t_sw); 771 #define vmstat_pgtok(a) ((a) * (sum.v_page_size >> 10)) 772 #define rate(x) (((x) * rate_adj + halfuptime) / uptime) /* round */ 773 if (hflag) { 774 printf(" "); 775 prthuman(total.t_avm * (u_int64_t)sum.v_page_size, 7); 776 printf(" "); 777 prthuman(total.t_free * (u_int64_t)sum.v_page_size, 6); 778 printf(" "); 779 } else { 780 printf(" %7d ", vmstat_pgtok(total.t_avm)); 781 printf(" %6d ", vmstat_pgtok(total.t_free)); 782 } 783 (void)printf("%5lu ", 784 (unsigned long)rate(sum.v_vm_faults - osum.v_vm_faults)); 785 (void)printf("%3lu ", 786 (unsigned long)rate(sum.v_reactivated - osum.v_reactivated)); 787 (void)printf("%3lu ", 788 (unsigned long)rate(sum.v_swapin + sum.v_vnodein - 789 (osum.v_swapin + osum.v_vnodein))); 790 (void)printf("%3lu ", 791 (unsigned long)rate(sum.v_swapout + sum.v_vnodeout - 792 (osum.v_swapout + osum.v_vnodeout))); 793 (void)printf("%5lu ", 794 (unsigned long)rate(sum.v_tfree - osum.v_tfree)); 795 (void)printf("%3lu ", 796 (unsigned long)rate(sum.v_pdpages - osum.v_pdpages)); 797 devstats(); 798 (void)printf("%4lu %4lu %4lu", 799 (unsigned long)rate(sum.v_intr - osum.v_intr), 800 (unsigned long)rate(sum.v_syscall - osum.v_syscall), 801 (unsigned long)rate(sum.v_swtch - osum.v_swtch)); 802 if (Pflag) 803 pcpustats(ncpus, cpumask, maxid); 804 else 805 cpustats(); 806 (void)printf("\n"); 807 (void)fflush(stdout); 808 if (reps >= 0 && --reps <= 0) 809 break; 810 osum = sum; 811 uptime = interval; 812 rate_adj = 1000; 813 /* 814 * We round upward to avoid losing low-frequency events 815 * (i.e., >= 1 per interval but < 1 per millisecond). 816 */ 817 if (interval != 1) 818 halfuptime = (uptime + 1) / 2; 819 else 820 halfuptime = 0; 821 (void)usleep(interval * 1000); 822 } 823 } 824 825 static void 826 printhdr(int ncpus, u_long cpumask) 827 { 828 int i, num_shown; 829 830 num_shown = (num_selected < maxshowdevs) ? num_selected : maxshowdevs; 831 (void)printf(" procs memory page%*s", 19, ""); 832 if (num_shown > 1) 833 (void)printf(" disks %*s", num_shown * 4 - 7, ""); 834 else if (num_shown == 1) 835 (void)printf("disk"); 836 (void)printf(" faults "); 837 if (Pflag) { 838 for (i = 0; i < ncpus; i++) { 839 if (cpumask & (1ul << i)) 840 printf("cpu%-2d ", i); 841 } 842 printf("\n"); 843 } else 844 printf("cpu\n"); 845 (void)printf(" r b w avm fre flt re pi po fr sr "); 846 for (i = 0; i < num_devices; i++) 847 if ((dev_select[i].selected) 848 && (dev_select[i].selected <= maxshowdevs)) 849 (void)printf("%c%c%d ", dev_select[i].device_name[0], 850 dev_select[i].device_name[1], 851 dev_select[i].unit_number); 852 (void)printf(" in sy cs"); 853 if (Pflag) { 854 for (i = 0; i < ncpus; i++) 855 printf(" us sy id"); 856 printf("\n"); 857 } else 858 printf(" us sy id\n"); 859 if (wresized != 0) 860 doresize(); 861 hdrcnt = winlines; 862 } 863 864 /* 865 * Force a header to be prepended to the next output. 866 */ 867 static void 868 needhdr(int dummy __unused) 869 { 870 871 hdrcnt = 1; 872 } 873 874 /* 875 * When the terminal is resized, force an update of the maximum number of rows 876 * printed between each header repetition. Then force a new header to be 877 * prepended to the next output. 878 */ 879 void 880 needresize(int signo) 881 { 882 883 wresized = 1; 884 hdrcnt = 1; 885 } 886 887 /* 888 * Update the global `winlines' count of terminal rows. 889 */ 890 void 891 doresize(void) 892 { 893 int status; 894 struct winsize w; 895 896 for (;;) { 897 status = ioctl(fileno(stdout), TIOCGWINSZ, &w); 898 if (status == -1 && errno == EINTR) 899 continue; 900 else if (status == -1) 901 err(1, "ioctl"); 902 if (w.ws_row > 3) 903 winlines = w.ws_row - 3; 904 else 905 winlines = VMSTAT_DEFAULT_LINES; 906 break; 907 } 908 909 /* 910 * Inhibit doresize() calls until we are rescheduled by SIGWINCH. 911 */ 912 wresized = 0; 913 } 914 915 #ifdef notyet 916 static void 917 dotimes(void) 918 { 919 unsigned int pgintime, rectime; 920 921 kread(X_REC, &rectime, sizeof(rectime)); 922 kread(X_PGIN, &pgintime, sizeof(pgintime)); 923 kread(X_SUM, &sum, sizeof(sum)); 924 (void)printf("%u reclaims, %u total time (usec)\n", 925 sum.v_pgrec, rectime); 926 (void)printf("average: %u usec / reclaim\n", rectime / sum.v_pgrec); 927 (void)printf("\n"); 928 (void)printf("%u page ins, %u total time (msec)\n", 929 sum.v_pgin, pgintime / 10); 930 (void)printf("average: %8.1f msec / page in\n", 931 pgintime / (sum.v_pgin * 10.0)); 932 } 933 #endif 934 935 static long 936 pct(long top, long bot) 937 { 938 long ans; 939 940 if (bot == 0) 941 return(0); 942 ans = (quad_t)top * 100 / bot; 943 return (ans); 944 } 945 946 #define PCT(top, bot) pct((long)(top), (long)(bot)) 947 948 static void 949 dosum(void) 950 { 951 struct nchstats lnchstats; 952 long nchtotal; 953 954 fill_vmmeter(&sum); 955 (void)printf("%9u cpu context switches\n", sum.v_swtch); 956 (void)printf("%9u device interrupts\n", sum.v_intr); 957 (void)printf("%9u software interrupts\n", sum.v_soft); 958 (void)printf("%9u traps\n", sum.v_trap); 959 (void)printf("%9u system calls\n", sum.v_syscall); 960 (void)printf("%9u kernel threads created\n", sum.v_kthreads); 961 (void)printf("%9u fork() calls\n", sum.v_forks); 962 (void)printf("%9u vfork() calls\n", sum.v_vforks); 963 (void)printf("%9u rfork() calls\n", sum.v_rforks); 964 (void)printf("%9u swap pager pageins\n", sum.v_swapin); 965 (void)printf("%9u swap pager pages paged in\n", sum.v_swappgsin); 966 (void)printf("%9u swap pager pageouts\n", sum.v_swapout); 967 (void)printf("%9u swap pager pages paged out\n", sum.v_swappgsout); 968 (void)printf("%9u vnode pager pageins\n", sum.v_vnodein); 969 (void)printf("%9u vnode pager pages paged in\n", sum.v_vnodepgsin); 970 (void)printf("%9u vnode pager pageouts\n", sum.v_vnodeout); 971 (void)printf("%9u vnode pager pages paged out\n", sum.v_vnodepgsout); 972 (void)printf("%9u page daemon wakeups\n", sum.v_pdwakeups); 973 (void)printf("%9u pages examined by the page daemon\n", sum.v_pdpages); 974 (void)printf("%9u pages reactivated\n", sum.v_reactivated); 975 (void)printf("%9u copy-on-write faults\n", sum.v_cow_faults); 976 (void)printf("%9u copy-on-write optimized faults\n", sum.v_cow_optim); 977 (void)printf("%9u zero fill pages zeroed\n", sum.v_zfod); 978 (void)printf("%9u zero fill pages prezeroed\n", sum.v_ozfod); 979 (void)printf("%9u intransit blocking page faults\n", sum.v_intrans); 980 (void)printf("%9u total VM faults taken\n", sum.v_vm_faults); 981 (void)printf("%9u pages affected by kernel thread creation\n", sum.v_kthreadpages); 982 (void)printf("%9u pages affected by fork()\n", sum.v_forkpages); 983 (void)printf("%9u pages affected by vfork()\n", sum.v_vforkpages); 984 (void)printf("%9u pages affected by rfork()\n", sum.v_rforkpages); 985 (void)printf("%9u pages cached\n", sum.v_tcached); 986 (void)printf("%9u pages freed\n", sum.v_tfree); 987 (void)printf("%9u pages freed by daemon\n", sum.v_dfree); 988 (void)printf("%9u pages freed by exiting processes\n", sum.v_pfree); 989 (void)printf("%9u pages active\n", sum.v_active_count); 990 (void)printf("%9u pages inactive\n", sum.v_inactive_count); 991 (void)printf("%9u pages in VM cache\n", sum.v_cache_count); 992 (void)printf("%9u pages wired down\n", sum.v_wire_count); 993 (void)printf("%9u pages free\n", sum.v_free_count); 994 (void)printf("%9u bytes per page\n", sum.v_page_size); 995 if (kd != NULL) { 996 kread(X_NCHSTATS, &lnchstats, sizeof(lnchstats)); 997 } else { 998 size_t size = sizeof(lnchstats); 999 mysysctl("vfs.cache.nchstats", &lnchstats, &size, NULL, 0); 1000 if (size != sizeof(lnchstats)) 1001 errx(1, "vfs.cache.nchstats size mismatch"); 1002 } 1003 nchtotal = lnchstats.ncs_goodhits + lnchstats.ncs_neghits + 1004 lnchstats.ncs_badhits + lnchstats.ncs_falsehits + 1005 lnchstats.ncs_miss + lnchstats.ncs_long; 1006 (void)printf("%9ld total name lookups\n", nchtotal); 1007 (void)printf( 1008 "%9s cache hits (%ld%% pos + %ld%% neg) system %ld%% per-directory\n", 1009 "", PCT(lnchstats.ncs_goodhits, nchtotal), 1010 PCT(lnchstats.ncs_neghits, nchtotal), 1011 PCT(lnchstats.ncs_pass2, nchtotal)); 1012 (void)printf("%9s deletions %ld%%, falsehits %ld%%, toolong %ld%%\n", "", 1013 PCT(lnchstats.ncs_badhits, nchtotal), 1014 PCT(lnchstats.ncs_falsehits, nchtotal), 1015 PCT(lnchstats.ncs_long, nchtotal)); 1016 } 1017 1018 static void 1019 doforkst(void) 1020 { 1021 fill_vmmeter(&sum); 1022 (void)printf("%u forks, %u pages, average %.2f\n", 1023 sum.v_forks, sum.v_forkpages, 1024 sum.v_forks == 0 ? 0.0 : 1025 (double)sum.v_forkpages / sum.v_forks); 1026 (void)printf("%u vforks, %u pages, average %.2f\n", 1027 sum.v_vforks, sum.v_vforkpages, 1028 sum.v_vforks == 0 ? 0.0 : 1029 (double)sum.v_vforkpages / sum.v_vforks); 1030 (void)printf("%u rforks, %u pages, average %.2f\n", 1031 sum.v_rforks, sum.v_rforkpages, 1032 sum.v_rforks == 0 ? 0.0 : 1033 (double)sum.v_rforkpages / sum.v_rforks); 1034 } 1035 1036 static void 1037 devstats(void) 1038 { 1039 int dn, state; 1040 long double transfers_per_second; 1041 long double busy_seconds; 1042 long tmp; 1043 1044 for (state = 0; state < CPUSTATES; ++state) { 1045 tmp = cur.cp_time[state]; 1046 cur.cp_time[state] -= last.cp_time[state]; 1047 last.cp_time[state] = tmp; 1048 } 1049 1050 busy_seconds = cur.snap_time - last.snap_time; 1051 1052 for (dn = 0; dn < num_devices; dn++) { 1053 int di; 1054 1055 if ((dev_select[dn].selected == 0) 1056 || (dev_select[dn].selected > maxshowdevs)) 1057 continue; 1058 1059 di = dev_select[dn].position; 1060 1061 if (devstat_compute_statistics(&cur.dinfo->devices[di], 1062 &last.dinfo->devices[di], busy_seconds, 1063 DSM_TRANSFERS_PER_SECOND, &transfers_per_second, 1064 DSM_NONE) != 0) 1065 errx(1, "%s", devstat_errbuf); 1066 1067 (void)printf("%3.0Lf ", transfers_per_second); 1068 } 1069 } 1070 1071 static void 1072 percent(double pct, int *over) 1073 { 1074 char buf[10]; 1075 int l; 1076 1077 l = snprintf(buf, sizeof(buf), "%.0f", pct); 1078 if (l == 1 && *over) { 1079 printf("%s", buf); 1080 (*over)--; 1081 } else 1082 printf("%2s", buf); 1083 if (l > 2) 1084 (*over)++; 1085 } 1086 1087 static void 1088 cpustats(void) 1089 { 1090 int state, over; 1091 double lpct, total; 1092 1093 total = 0; 1094 for (state = 0; state < CPUSTATES; ++state) 1095 total += cur.cp_time[state]; 1096 if (total) 1097 lpct = 100.0 / total; 1098 else 1099 lpct = 0.0; 1100 over = 0; 1101 printf(" "); 1102 percent((cur.cp_time[CP_USER] + cur.cp_time[CP_NICE]) * lpct, &over); 1103 printf(" "); 1104 percent((cur.cp_time[CP_SYS] + cur.cp_time[CP_INTR]) * lpct, &over); 1105 printf(" "); 1106 percent(cur.cp_time[CP_IDLE] * lpct, &over); 1107 } 1108 1109 static void 1110 pcpustats(int ncpus, u_long cpumask, int maxid) 1111 { 1112 int state, i; 1113 double lpct, total; 1114 long tmp; 1115 int over; 1116 1117 /* devstats does this for cp_time */ 1118 for (i = 0; i <= maxid; i++) { 1119 if ((cpumask & (1ul << i)) == 0) 1120 continue; 1121 for (state = 0; state < CPUSTATES; ++state) { 1122 tmp = cur_cp_times[i * CPUSTATES + state]; 1123 cur_cp_times[i * CPUSTATES + state] -= last_cp_times[i * CPUSTATES + state]; 1124 last_cp_times[i * CPUSTATES + state] = tmp; 1125 } 1126 } 1127 1128 over = 0; 1129 for (i = 0; i <= maxid; i++) { 1130 if ((cpumask & (1ul << i)) == 0) 1131 continue; 1132 total = 0; 1133 for (state = 0; state < CPUSTATES; ++state) 1134 total += cur_cp_times[i * CPUSTATES + state]; 1135 if (total) 1136 lpct = 100.0 / total; 1137 else 1138 lpct = 0.0; 1139 printf(" "); 1140 percent((cur_cp_times[i * CPUSTATES + CP_USER] + 1141 cur_cp_times[i * CPUSTATES + CP_NICE]) * lpct, &over); 1142 printf(" "); 1143 percent((cur_cp_times[i * CPUSTATES + CP_SYS] + 1144 cur_cp_times[i * CPUSTATES + CP_INTR]) * lpct, &over); 1145 printf(" "); 1146 percent(cur_cp_times[i * CPUSTATES + CP_IDLE] * lpct, &over); 1147 } 1148 } 1149 1150 static void 1151 dointr(void) 1152 { 1153 unsigned long *intrcnt, uptime; 1154 uint64_t inttotal; 1155 size_t clen, inamlen, intrcntlen, istrnamlen; 1156 unsigned int i, nintr; 1157 char *intrname, *tintrname; 1158 1159 uptime = getuptime(); 1160 if (kd != NULL) { 1161 intrcntlen = namelist[X_EINTRCNT].n_value - 1162 namelist[X_INTRCNT].n_value; 1163 inamlen = namelist[X_EINTRNAMES].n_value - 1164 namelist[X_INTRNAMES].n_value; 1165 if ((intrcnt = malloc(intrcntlen)) == NULL || 1166 (intrname = malloc(inamlen)) == NULL) 1167 err(1, "malloc()"); 1168 kread(X_INTRCNT, intrcnt, intrcntlen); 1169 kread(X_INTRNAMES, intrname, inamlen); 1170 } else { 1171 for (intrcnt = NULL, intrcntlen = 1024; ; intrcntlen *= 2) { 1172 if ((intrcnt = reallocf(intrcnt, intrcntlen)) == NULL) 1173 err(1, "reallocf()"); 1174 if (mysysctl("hw.intrcnt", 1175 intrcnt, &intrcntlen, NULL, 0) == 0) 1176 break; 1177 } 1178 for (intrname = NULL, inamlen = 1024; ; inamlen *= 2) { 1179 if ((intrname = reallocf(intrname, inamlen)) == NULL) 1180 err(1, "reallocf()"); 1181 if (mysysctl("hw.intrnames", 1182 intrname, &inamlen, NULL, 0) == 0) 1183 break; 1184 } 1185 } 1186 nintr = intrcntlen / sizeof(unsigned long); 1187 tintrname = intrname; 1188 istrnamlen = strlen("interrupt"); 1189 for (i = 0; i < nintr; i++) { 1190 clen = strlen(tintrname); 1191 if (clen > istrnamlen) 1192 istrnamlen = clen; 1193 tintrname += clen + 1; 1194 } 1195 (void)printf("%-*s %20s %10s\n", istrnamlen, "interrupt", "total", 1196 "rate"); 1197 inttotal = 0; 1198 for (i = 0; i < nintr; i++) { 1199 if (intrname[0] != '\0' && (*intrcnt != 0 || aflag)) 1200 (void)printf("%-*s %20lu %10lu\n", istrnamlen, intrname, 1201 *intrcnt, *intrcnt / uptime); 1202 intrname += strlen(intrname) + 1; 1203 inttotal += *intrcnt++; 1204 } 1205 (void)printf("%-*s %20llu %10llu\n", istrnamlen, "Total", 1206 (long long)inttotal, (long long)(inttotal / uptime)); 1207 } 1208 1209 static void 1210 domemstat_malloc(void) 1211 { 1212 struct memory_type_list *mtlp; 1213 struct memory_type *mtp; 1214 int error, first, i; 1215 1216 mtlp = memstat_mtl_alloc(); 1217 if (mtlp == NULL) { 1218 warn("memstat_mtl_alloc"); 1219 return; 1220 } 1221 if (kd == NULL) { 1222 if (memstat_sysctl_malloc(mtlp, 0) < 0) { 1223 warnx("memstat_sysctl_malloc: %s", 1224 memstat_strerror(memstat_mtl_geterror(mtlp))); 1225 return; 1226 } 1227 } else { 1228 if (memstat_kvm_malloc(mtlp, kd) < 0) { 1229 error = memstat_mtl_geterror(mtlp); 1230 if (error == MEMSTAT_ERROR_KVM) 1231 warnx("memstat_kvm_malloc: %s", 1232 kvm_geterr(kd)); 1233 else 1234 warnx("memstat_kvm_malloc: %s", 1235 memstat_strerror(error)); 1236 } 1237 } 1238 printf("%13s %5s %6s %7s %8s Size(s)\n", "Type", "InUse", "MemUse", 1239 "HighUse", "Requests"); 1240 for (mtp = memstat_mtl_first(mtlp); mtp != NULL; 1241 mtp = memstat_mtl_next(mtp)) { 1242 if (memstat_get_numallocs(mtp) == 0 && 1243 memstat_get_count(mtp) == 0) 1244 continue; 1245 printf("%13s %5lld %5lldK %7s %8lld ", 1246 memstat_get_name(mtp), memstat_get_count(mtp), 1247 ((int64_t)memstat_get_bytes(mtp) + 1023) / 1024, "-", 1248 memstat_get_numallocs(mtp)); 1249 first = 1; 1250 for (i = 0; i < 32; i++) { 1251 if (memstat_get_sizemask(mtp) & (1 << i)) { 1252 if (!first) 1253 printf(","); 1254 printf("%d", 1 << (i + 4)); 1255 first = 0; 1256 } 1257 } 1258 printf("\n"); 1259 } 1260 memstat_mtl_free(mtlp); 1261 } 1262 1263 static void 1264 domemstat_zone(void) 1265 { 1266 struct memory_type_list *mtlp; 1267 struct memory_type *mtp; 1268 char name[MEMTYPE_MAXNAME + 1]; 1269 int error; 1270 1271 mtlp = memstat_mtl_alloc(); 1272 if (mtlp == NULL) { 1273 warn("memstat_mtl_alloc"); 1274 return; 1275 } 1276 if (kd == NULL) { 1277 if (memstat_sysctl_uma(mtlp, 0) < 0) { 1278 warnx("memstat_sysctl_uma: %s", 1279 memstat_strerror(memstat_mtl_geterror(mtlp))); 1280 return; 1281 } 1282 } else { 1283 if (memstat_kvm_uma(mtlp, kd) < 0) { 1284 error = memstat_mtl_geterror(mtlp); 1285 if (error == MEMSTAT_ERROR_KVM) 1286 warnx("memstat_kvm_uma: %s", 1287 kvm_geterr(kd)); 1288 else 1289 warnx("memstat_kvm_uma: %s", 1290 memstat_strerror(error)); 1291 } 1292 } 1293 printf("%-20s %6s %6s %8s %8s %8s %4s %4s\n\n", "ITEM", "SIZE", 1294 "LIMIT", "USED", "FREE", "REQ", "FAIL", "SLEEP"); 1295 for (mtp = memstat_mtl_first(mtlp); mtp != NULL; 1296 mtp = memstat_mtl_next(mtp)) { 1297 strlcpy(name, memstat_get_name(mtp), MEMTYPE_MAXNAME); 1298 strcat(name, ":"); 1299 printf("%-20s %6llu, %6llu,%8llu,%8llu,%8llu,%4llu,%4llu\n",name, 1300 memstat_get_size(mtp), memstat_get_countlimit(mtp), 1301 memstat_get_count(mtp), memstat_get_free(mtp), 1302 memstat_get_numallocs(mtp), memstat_get_failures(mtp), 1303 memstat_get_sleeps(mtp)); 1304 } 1305 memstat_mtl_free(mtlp); 1306 printf("\n"); 1307 } 1308 1309 /* 1310 * kread reads something from the kernel, given its nlist index. 1311 */ 1312 static void 1313 kreado(int nlx, void *addr, size_t size, size_t offset) 1314 { 1315 const char *sym; 1316 1317 if (namelist[nlx].n_type == 0 || namelist[nlx].n_value == 0) { 1318 sym = namelist[nlx].n_name; 1319 if (*sym == '_') 1320 ++sym; 1321 errx(1, "symbol %s not defined", sym); 1322 } 1323 if ((size_t)kvm_read(kd, namelist[nlx].n_value + offset, addr, 1324 size) != size) { 1325 sym = namelist[nlx].n_name; 1326 if (*sym == '_') 1327 ++sym; 1328 errx(1, "%s: %s", sym, kvm_geterr(kd)); 1329 } 1330 } 1331 1332 static void 1333 kread(int nlx, void *addr, size_t size) 1334 { 1335 kreado(nlx, addr, size, 0); 1336 } 1337 1338 static char * 1339 kgetstr(const char *strp) 1340 { 1341 int n = 0, size = 1; 1342 char *ret = NULL; 1343 1344 do { 1345 if (size == n + 1) { 1346 ret = realloc(ret, size); 1347 if (ret == NULL) 1348 err(1, "%s: realloc", __func__); 1349 size *= 2; 1350 } 1351 if (kvm_read(kd, (u_long)strp + n, &ret[n], 1) != 1) 1352 errx(1, "%s: %s", __func__, kvm_geterr(kd)); 1353 } while (ret[n++] != '\0'); 1354 return (ret); 1355 } 1356 1357 static void 1358 usage(void) 1359 { 1360 (void)fprintf(stderr, "%s%s", 1361 "usage: vmstat [-afHhimPsz] [-c count] [-M core [-N system]] [-w wait]\n", 1362 " [-n devs] [-p type,if,pass] [disks]\n"); 1363 exit(1); 1364 } 1365