/* * Copyright (c) 1980, 1986, 1991, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint static const char copyright[] = "@(#) Copyright (c) 1980, 1986, 1991, 1993\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "@(#)vmstat.c 8.1 (Berkeley) 6/6/93"; #endif static const char rcsid[] = "$Id: vmstat.c,v 1.23 1998/03/07 23:40:23 dyson Exp $"; #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include struct nlist namelist[] = { #define X_CPTIME 0 { "_cp_time" }, #define X_DK_NDRIVE 1 { "_dk_ndrive" }, #define X_SUM 2 { "_cnt" }, #define X_BOOTTIME 3 { "_boottime" }, #define X_DKXFER 4 { "_dk_xfer" }, #define X_HZ 5 { "_hz" }, #define X_STATHZ 6 { "_stathz" }, #define X_NCHSTATS 7 { "_nchstats" }, #define X_INTRNAMES 8 { "_intrnames" }, #define X_EINTRNAMES 9 { "_eintrnames" }, #define X_INTRCNT 10 { "_intrcnt" }, #define X_EINTRCNT 11 { "_eintrcnt" }, #define X_KMEMSTATISTICS 12 { "_kmemstatistics" }, #define X_KMEMBUCKETS 13 { "_bucket" }, #ifdef notyet #define X_DEFICIT 14 { "_deficit" }, #define X_FORKSTAT 15 { "_forkstat" }, #define X_REC 16 { "_rectime" }, #define X_PGIN 17 { "_pgintime" }, #define X_XSTATS 18 { "_xstats" }, #define X_END 19 #else #define X_END 14 #endif #if defined(hp300) || defined(luna68k) #define X_HPDINIT (X_END) { "_hp_dinit" }, #endif #if defined(i386) #define X_DK_NAMES (X_END) { "_dk_names" }, #endif #ifdef mips #define X_SCSI_DINIT (X_END) { "_scsi_dinit" }, #endif #ifdef tahoe #define X_VBDINIT (X_END) { "_vbdinit" }, #define X_CKEYSTATS (X_END+1) { "_ckeystats" }, #define X_DKEYSTATS (X_END+2) { "_dkeystats" }, #endif #ifdef vax #define X_MBDINIT (X_END) { "_mbdinit" }, #define X_UBDINIT (X_END+1) { "_ubdinit" }, #endif { "" }, }; struct _disk { long time[CPUSTATES]; long *xfer; } cur, last; struct vmmeter sum, osum; char **dr_name; int *dr_select, dk_ndrive, ndrives; int winlines = 20; kvm_t *kd; #define FORKSTAT 0x01 #define INTRSTAT 0x02 #define MEMSTAT 0x04 #define SUMSTAT 0x08 #define TIMESTAT 0x10 #define VMSTAT 0x20 #include "names.c" /* disk names -- machine dependent */ void cpustats(), dkstats(), dointr(), domem(), dosum(); void dovmstat(), kread(), usage(); #ifdef notyet void dotimes(), doforkst(); #endif void printhdr __P((void)); int main(argc, argv) register int argc; register char **argv; { register int c, todo; u_int interval; int reps; char *memf, *nlistf; char errbuf[_POSIX2_LINE_MAX]; memf = nlistf = NULL; interval = reps = todo = 0; while ((c = getopt(argc, argv, "c:fiM:mN:stw:")) != -1) { switch (c) { case 'c': reps = atoi(optarg); break; case 'f': #ifdef notyet todo |= FORKSTAT; #else errx(EX_USAGE, "sorry, -f is not (re)implemented yet"); #endif break; case 'i': todo |= INTRSTAT; break; case 'M': memf = optarg; break; case 'm': todo |= MEMSTAT; break; case 'N': nlistf = optarg; break; case 's': todo |= SUMSTAT; break; case 't': #ifdef notyet todo |= TIMESTAT; #else errx(EX_USAGE, "sorry, -t is not (re)implemented yet"); #endif break; case 'w': interval = atoi(optarg); break; case '?': default: usage(); } } argc -= optind; argv += optind; if (todo == 0) todo = VMSTAT; /* * Discard setgid privileges if not the running kernel so that bad * guys can't print interesting stuff from kernel memory. */ if (nlistf != NULL || memf != NULL) setgid(getgid()); kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf); if (kd == 0) errx(1, "kvm_openfiles: %s", errbuf); if ((c = kvm_nlist(kd, namelist)) != 0) { if (c > 0) { warnx("undefined symbols:"); for (c = 0; c < sizeof(namelist)/sizeof(namelist[0]); c++) if (namelist[c].n_type == 0) fprintf(stderr, " %s", namelist[c].n_name); (void)fputc('\n', stderr); } else warnx("kvm_nlist: %s", kvm_geterr(kd)); exit(1); } if (todo & VMSTAT) { char **getdrivedata(); struct winsize winsize; argv = getdrivedata(argv); winsize.ws_row = 0; (void) ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&winsize); if (winsize.ws_row > 0) winlines = winsize.ws_row; } #define BACKWARD_COMPATIBILITY #ifdef BACKWARD_COMPATIBILITY if (*argv) { interval = atoi(*argv); if (*++argv) reps = atoi(*argv); } #endif if (interval) { if (!reps) reps = -1; } else if (reps) interval = 1; #ifdef notyet if (todo & FORKSTAT) doforkst(); #endif if (todo & MEMSTAT) domem(); if (todo & SUMSTAT) dosum(); #ifdef notyet if (todo & TIMESTAT) dotimes(); #endif if (todo & INTRSTAT) dointr(); if (todo & VMSTAT) dovmstat(interval, reps); exit(0); } char ** getdrivedata(argv) char **argv; { register int i; register char **cp; char buf[30]; kread(X_DK_NDRIVE, &dk_ndrive, sizeof(dk_ndrive)); if (dk_ndrive < 0) errx(1, "dk_ndrive %d", dk_ndrive); dr_select = calloc((size_t)dk_ndrive, sizeof(int)); dr_name = calloc((size_t)dk_ndrive, sizeof(char *)); for (i = 0; i < dk_ndrive; i++) dr_name[i] = NULL; cur.xfer = calloc((size_t)dk_ndrive, sizeof(long)); last.xfer = calloc((size_t)dk_ndrive, sizeof(long)); if (!read_names()) exit (1); for (i = 0; i < dk_ndrive; i++) if (dr_name[i] == NULL) { (void)sprintf(buf, "??%d", i); dr_name[i] = strdup(buf); } /* * Choose drives to be displayed. Priority goes to (in order) drives * supplied as arguments, default drives. If everything isn't filled * in and there are drives not taken care of, display the first few * that fit. */ #define BACKWARD_COMPATIBILITY for (ndrives = 0; *argv; ++argv) { #ifdef BACKWARD_COMPATIBILITY if (isdigit(**argv)) break; #endif for (i = 0; i < dk_ndrive; i++) { if (strcmp(dr_name[i], *argv)) continue; dr_select[i] = 1; ++ndrives; break; } } for (i = 0; i < dk_ndrive && ndrives < 4; i++) { if (dr_select[i]) continue; for (cp = defdrives; *cp; cp++) if (strcmp(dr_name[i], *cp) == 0) { dr_select[i] = 1; ++ndrives; break; } } for (i = 0; i < dk_ndrive && ndrives < 4; i++) { if (dr_select[i]) continue; dr_select[i] = 1; ++ndrives; } return(argv); } long getuptime() { static time_t now, boottime; time_t uptime; if (boottime == 0) kread(X_BOOTTIME, &boottime, sizeof(boottime)); (void)time(&now); uptime = now - boottime; if (uptime <= 0 || uptime > 60*60*24*365*10) errx(1, "time makes no sense; namelist must be wrong"); return(uptime); } int hz, hdrcnt; void dovmstat(interval, reps) u_int interval; int reps; { struct vmtotal total; time_t uptime, halfuptime; void needhdr(); int mib[2], size; uptime = getuptime(); halfuptime = uptime / 2; (void)signal(SIGCONT, needhdr); if (namelist[X_STATHZ].n_type != 0 && namelist[X_STATHZ].n_value != 0) kread(X_STATHZ, &hz, sizeof(hz)); if (!hz) kread(X_HZ, &hz, sizeof(hz)); for (hdrcnt = 1;;) { if (!--hdrcnt) printhdr(); kread(X_CPTIME, cur.time, sizeof(cur.time)); kread(X_DKXFER, cur.xfer, sizeof(*cur.xfer) * dk_ndrive); kread(X_SUM, &sum, sizeof(sum)); size = sizeof(total); mib[0] = CTL_VM; mib[1] = VM_METER; if (sysctl(mib, 2, &total, &size, NULL, 0) < 0) { printf("Can't get kerninfo: %s\n", strerror(errno)); bzero(&total, sizeof(total)); } (void)printf("%2d%2d%2d", total.t_rq - 1, total.t_dw + total.t_pw, total.t_sw); #define pgtok(a) ((a) * sum.v_page_size >> 10) #define rate(x) (((x) + halfuptime) / uptime) /* round */ (void)printf("%8ld%6ld ", (long)pgtok(total.t_avm), (long)pgtok(total.t_free)); (void)printf("%4lu ", (u_long)rate(sum.v_vm_faults - osum.v_vm_faults)); (void)printf("%3lu ", (u_long)rate(sum.v_reactivated - osum.v_reactivated)); (void)printf("%3lu ", (u_long)rate(sum.v_swapin + sum.v_vnodein - (osum.v_swapin + osum.v_vnodein))); (void)printf("%3lu ", (u_long)rate(sum.v_swapout + sum.v_vnodeout - (osum.v_swapout + osum.v_vnodeout))); (void)printf("%3lu ", (u_long)rate(sum.v_tfree - osum.v_tfree)); (void)printf("%3lu ", (u_long)rate(sum.v_pdpages - osum.v_pdpages)); dkstats(); (void)printf("%4lu %4lu %3lu ", (u_long)rate(sum.v_intr - osum.v_intr), (u_long)rate(sum.v_syscall - osum.v_syscall), (u_long)rate(sum.v_swtch - osum.v_swtch)); cpustats(); (void)printf("\n"); (void)fflush(stdout); if (reps >= 0 && --reps <= 0) break; osum = sum; uptime = interval; /* * We round upward to avoid losing low-frequency events * (i.e., >= 1 per interval but < 1 per second). */ if (interval != 1) halfuptime = (uptime + 1) / 2; else halfuptime = 0; (void)sleep(interval); } } void printhdr() { register int i; (void)printf(" procs memory page%*s", 20, ""); if (ndrives > 1) (void)printf("disks %*s faults cpu\n", ndrives * 3 - 6, ""); else (void)printf("%*s faults cpu\n", ndrives * 3, ""); (void)printf(" r b w avm fre flt re pi po fr sr "); for (i = 0; i < dk_ndrive; i++) if (dr_select[i]) (void)printf("%c%c ", dr_name[i][0], dr_name[i][strlen(dr_name[i]) - 1]); (void)printf(" in sy cs us sy id\n"); hdrcnt = winlines - 2; } /* * Force a header to be prepended to the next output. */ void needhdr() { hdrcnt = 1; } #ifdef notyet void dotimes() { u_int pgintime, rectime; kread(X_REC, &rectime, sizeof(rectime)); kread(X_PGIN, &pgintime, sizeof(pgintime)); kread(X_SUM, &sum, sizeof(sum)); (void)printf("%u reclaims, %u total time (usec)\n", sum.v_pgrec, rectime); (void)printf("average: %u usec / reclaim\n", rectime / sum.v_pgrec); (void)printf("\n"); (void)printf("%u page ins, %u total time (msec)\n", sum.v_pgin, pgintime / 10); (void)printf("average: %8.1f msec / page in\n", pgintime / (sum.v_pgin * 10.0)); } #endif long pct(top, bot) long top, bot; { long ans; if (bot == 0) return(0); ans = (quad_t)top * 100 / bot; return (ans); } #define PCT(top, bot) pct((long)(top), (long)(bot)) #if defined(tahoe) #include #endif void dosum() { struct nchstats nchstats; long nchtotal; #if defined(tahoe) struct keystats keystats; #endif kread(X_SUM, &sum, sizeof(sum)); (void)printf("%9u cpu context switches\n", sum.v_swtch); (void)printf("%9u device interrupts\n", sum.v_intr); (void)printf("%9u software interrupts\n", sum.v_soft); #ifdef vax (void)printf("%9u pseudo-dma dz interrupts\n", sum.v_pdma); #endif (void)printf("%9u traps\n", sum.v_trap); (void)printf("%9u system calls\n", sum.v_syscall); (void)printf("%9u swap pager pageins\n", sum.v_swapin); (void)printf("%9u swap pager pages paged in\n", sum.v_swappgsin); (void)printf("%9u swap pager pageouts\n", sum.v_swapout); (void)printf("%9u swap pager pages paged out\n", sum.v_swappgsout); (void)printf("%9u vnode pager pageins\n", sum.v_vnodein); (void)printf("%9u vnode pager pages paged in\n", sum.v_vnodepgsin); (void)printf("%9u vnode pager pageouts\n", sum.v_vnodeout); (void)printf("%9u vnode pager pages paged out\n", sum.v_vnodepgsout); (void)printf("%9u page daemon wakeups\n", sum.v_pdwakeups); (void)printf("%9u pages examined by the page daemon\n", sum.v_pdpages); (void)printf("%9u pages reactivated\n", sum.v_reactivated); (void)printf("%9u copy-on-write faults\n", sum.v_cow_faults); (void)printf("%9u copy-on-write optimized faults\n", sum.v_cow_optim); (void)printf("%9u zero fill pages zeroed\n", sum.v_zfod); (void)printf("%9u zero fill pages prezeroed\n", sum.v_ozfod); (void)printf("%9u intransit blocking page faults\n", sum.v_intrans); (void)printf("%9u total VM faults taken\n", sum.v_vm_faults); (void)printf("%9u pages freed\n", sum.v_tfree); (void)printf("%9u pages freed by daemon\n", sum.v_dfree); (void)printf("%9u pages freed by exiting processes\n", sum.v_pfree); (void)printf("%9u pages active\n", sum.v_active_count); (void)printf("%9u pages inactive\n", sum.v_inactive_count); (void)printf("%9u pages in VM cache\n", sum.v_cache_count); (void)printf("%9u pages wired down\n", sum.v_wire_count); (void)printf("%9u pages free\n", sum.v_free_count); (void)printf("%9u bytes per page\n", sum.v_page_size); kread(X_NCHSTATS, &nchstats, sizeof(nchstats)); nchtotal = nchstats.ncs_goodhits + nchstats.ncs_neghits + nchstats.ncs_badhits + nchstats.ncs_falsehits + nchstats.ncs_miss + nchstats.ncs_long; (void)printf("%9ld total name lookups\n", nchtotal); (void)printf( "%9s cache hits (%ld%% pos + %ld%% neg) system %ld%% per-directory\n", "", PCT(nchstats.ncs_goodhits, nchtotal), PCT(nchstats.ncs_neghits, nchtotal), PCT(nchstats.ncs_pass2, nchtotal)); (void)printf("%9s deletions %ld%%, falsehits %ld%%, toolong %ld%%\n", "", PCT(nchstats.ncs_badhits, nchtotal), PCT(nchstats.ncs_falsehits, nchtotal), PCT(nchstats.ncs_long, nchtotal)); #if defined(tahoe) kread(X_CKEYSTATS, &keystats, sizeof(keystats)); (void)printf("%9d %s (free %d%% norefs %d%% taken %d%% shared %d%%)\n", keystats.ks_allocs, "code cache keys allocated", PCT(keystats.ks_allocfree, keystats.ks_allocs), PCT(keystats.ks_norefs, keystats.ks_allocs), PCT(keystats.ks_taken, keystats.ks_allocs), PCT(keystats.ks_shared, keystats.ks_allocs)); kread(X_DKEYSTATS, &keystats, sizeof(keystats)); (void)printf("%9d %s (free %d%% norefs %d%% taken %d%% shared %d%%)\n", keystats.ks_allocs, "data cache keys allocated", PCT(keystats.ks_allocfree, keystats.ks_allocs), PCT(keystats.ks_norefs, keystats.ks_allocs), PCT(keystats.ks_taken, keystats.ks_allocs), PCT(keystats.ks_shared, keystats.ks_allocs)); #endif } #ifdef notyet void doforkst() { struct forkstat fks; kread(X_FORKSTAT, &fks, sizeof(struct forkstat)); (void)printf("%d forks, %d pages, average %.2f\n", fks.cntfork, fks.sizfork, (double)fks.sizfork / fks.cntfork); (void)printf("%d vforks, %d pages, average %.2f\n", fks.cntvfork, fks.sizvfork, (double)fks.sizvfork / fks.cntvfork); } #endif void dkstats() { register int dn, state; double etime; long tmp; for (dn = 0; dn < dk_ndrive; ++dn) { tmp = cur.xfer[dn]; cur.xfer[dn] -= last.xfer[dn]; last.xfer[dn] = tmp; } etime = 0; for (state = 0; state < CPUSTATES; ++state) { tmp = cur.time[state]; cur.time[state] -= last.time[state]; last.time[state] = tmp; etime += cur.time[state]; } if (etime == 0) etime = 1; etime /= hz; for (dn = 0; dn < dk_ndrive; ++dn) { if (!dr_select[dn]) continue; (void)printf("%2.0f ", cur.xfer[dn] / etime); } } void cpustats() { register int state; double pct, total; total = 0; for (state = 0; state < CPUSTATES; ++state) total += cur.time[state]; if (total) pct = 100 / total; else pct = 0; (void)printf("%2.0f ", (cur.time[CP_USER] + cur.time[CP_NICE]) * pct); (void)printf("%2.0f ", (cur.time[CP_SYS] + cur.time[CP_INTR]) * pct); (void)printf("%2.0f", cur.time[CP_IDLE] * pct); } void dointr() { register long *intrcnt, inttotal, uptime; register int nintr, inamlen; register char *intrname; uptime = getuptime(); nintr = namelist[X_EINTRCNT].n_value - namelist[X_INTRCNT].n_value; inamlen = namelist[X_EINTRNAMES].n_value - namelist[X_INTRNAMES].n_value; intrcnt = malloc((size_t)nintr); intrname = malloc((size_t)inamlen); if (intrcnt == NULL || intrname == NULL) errx(1, "malloc"); kread(X_INTRCNT, intrcnt, (size_t)nintr); kread(X_INTRNAMES, intrname, (size_t)inamlen); (void)printf("interrupt total rate\n"); inttotal = 0; nintr /= sizeof(long); while (--nintr >= 0) { if (*intrcnt) (void)printf("%-12s %8ld %8ld\n", intrname, *intrcnt, *intrcnt / uptime); intrname += strlen(intrname) + 1; inttotal += *intrcnt++; } (void)printf("Total %8ld %8ld\n", inttotal, inttotal / uptime); } void domem() { register struct kmembuckets *kp; register struct malloc_type *ks; register int i, j; int len, size, first, nkms; long totuse = 0, totfree = 0, totreq = 0; const char *name; struct malloc_type kmemstats[200], *kmsp; char *kmemnames[200]; char buf[1024]; struct kmembuckets buckets[MINBUCKET + 16]; kread(X_KMEMBUCKETS, buckets, sizeof(buckets)); kread(X_KMEMSTATISTICS, &kmsp, sizeof(kmsp)); for (nkms = 0; nkms < 200 && kmsp != NULL; nkms++) { if (sizeof(kmemstats[0]) != kvm_read(kd, (u_long)kmsp, &kmemstats[nkms], sizeof(kmemstats[0]))) err(1, "kvm_read(%p)", (void *)kmsp); if (sizeof(buf) != kvm_read(kd, (u_long)kmemstats[nkms].ks_shortdesc, buf, sizeof(buf))) err(1, "kvm_read(%p)", (void *)kmemstats[nkms].ks_shortdesc); kmemstats[nkms].ks_shortdesc = strdup(buf); kmsp = kmemstats[nkms].ks_next; } (void)printf("Memory statistics by bucket size\n"); (void)printf( "Size In Use Free Requests HighWater Couldfree\n"); for (i = MINBUCKET, kp = &buckets[i]; i < MINBUCKET + 16; i++, kp++) { if (kp->kb_calls == 0) continue; size = 1 << i; if(size < 1024) (void)printf("%4d",size); else (void)printf("%3dK",size>>10); (void)printf(" %8ld %6ld %10ld %7ld %10ld\n", kp->kb_total - kp->kb_totalfree, kp->kb_totalfree, kp->kb_calls, kp->kb_highwat, kp->kb_couldfree); totfree += size * kp->kb_totalfree; } (void)printf("\nMemory usage type by bucket size\n"); (void)printf("Size Type(s)\n"); kp = &buckets[MINBUCKET]; for (j = 1 << MINBUCKET; j < 1 << (MINBUCKET + 16); j <<= 1, kp++) { if (kp->kb_calls == 0) continue; first = 1; len = 8; for (i = 0, ks = &kmemstats[0]; i < nkms; i++, ks++) { if (ks->ks_calls == 0) continue; if ((ks->ks_size & j) == 0) continue; name = ks->ks_shortdesc; len += 2 + strlen(name); if (first && j < 1024) printf("%4d %s", j, name); else if (first) printf("%3dK %s", j>>10, name); else printf(","); if (len >= 79) { printf("\n\t "); len = 10 + strlen(name); } if (!first) printf(" %s", name); first = 0; } printf("\n"); } (void)printf( "\nMemory statistics by type Type Kern\n"); (void)printf( " Type InUse MemUse HighUse Limit Requests Limit Limit Size(s)\n"); for (i = 0, ks = &kmemstats[0]; i < nkms; i++, ks++) { if (ks->ks_calls == 0) continue; (void)printf("%13s%6ld%6ldK%7ldK%6ldK%9ld%5u%6u", ks->ks_shortdesc, ks->ks_inuse, (ks->ks_memuse + 1023) / 1024, (ks->ks_maxused + 1023) / 1024, (ks->ks_limit + 1023) / 1024, ks->ks_calls, ks->ks_limblocks, ks->ks_mapblocks); first = 1; for (j = 1 << MINBUCKET; j < 1 << (MINBUCKET + 16); j <<= 1) { if ((ks->ks_size & j) == 0) continue; if (first) printf(" "); else printf(","); if(j<1024) printf("%d",j); else printf("%dK",j>>10); first = 0; } printf("\n"); totuse += ks->ks_memuse; totreq += ks->ks_calls; } (void)printf("\nMemory Totals: In Use Free Requests\n"); (void)printf(" %7ldK %6ldK %8ld\n", (totuse + 1023) / 1024, (totfree + 1023) / 1024, totreq); } /* * kread reads something from the kernel, given its nlist index. */ void kread(nlx, addr, size) int nlx; void *addr; size_t size; { char *sym; if (namelist[nlx].n_type == 0 || namelist[nlx].n_value == 0) { sym = namelist[nlx].n_name; if (*sym == '_') ++sym; errx(1, "symbol %s not defined", sym); } if (kvm_read(kd, namelist[nlx].n_value, addr, size) != size) { sym = namelist[nlx].n_name; if (*sym == '_') ++sym; errx(1, "%s: %s", sym, kvm_geterr(kd)); } } void usage() { (void)fprintf(stderr, "usage: vmstat [-ims] [-c count] [-M core] [-N system] [-w wait] [disks]\n"); exit(1); }