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freebsd/usr.bin/vmstat/vmstat.c

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/*
* 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 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
static char sccsid[] = "@(#)vmstat.c 8.1 (Berkeley) 6/6/93";
#endif /* not lint */
#include <sys/param.h>
#include <sys/time.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/dkstat.h>
#include <sys/buf.h>
#include <sys/namei.h>
#include <sys/malloc.h>
#include <sys/signal.h>
#include <sys/fcntl.h>
#include <sys/ioctl.h>
#include <sys/sysctl.h>
#include <vm/vm.h>
#include <time.h>
#include <nlist.h>
#include <kvm.h>
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <paths.h>
#include <limits.h>
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_KMEMSTAT 12
{ "_kmemstats" },
#define X_KMEMBUCKETS 13
{ "_bucket" },
#ifdef notdef
#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 notdef
void dotimes(), doforkst();
#endif
main(argc, argv)
register int argc;
register char **argv;
{
extern int optind;
extern char *optarg;
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:")) != EOF) {
switch (c) {
case 'c':
reps = atoi(optarg);
break;
#ifndef notdef
case 'f':
todo |= FORKSTAT;
break;
#endif
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;
#ifndef notdef
case 't':
todo |= TIMESTAT;
break;
#endif
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) {
(void)fprintf(stderr,
"vmstat: kvm_openfiles: %s\n", errbuf);
exit(1);
}
if ((c = kvm_nlist(kd, namelist)) != 0) {
if (c > 0) {
(void)fprintf(stderr,
"vmstat: 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
(void)fprintf(stderr, "vmstat: kvm_nlist: %s\n",
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 notdef
if (todo & FORKSTAT)
doforkst();
#endif
if (todo & MEMSTAT)
domem();
if (todo & SUMSTAT)
dosum();
#ifdef notdef
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) {
(void)fprintf(stderr, "vmstat: dk_ndrive %d\n", dk_ndrive);
exit(1);
}
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) {
(void)fprintf(stderr,
"vmstat: time makes no sense; namelist must be wrong.\n");
exit(1);
}
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("%6ld%6ld ",
pgtok(total.t_avm), pgtok(total.t_free));
(void)printf("%4lu ", rate(sum.v_vm_faults - osum.v_vm_faults));
(void)printf("%3lu ",
rate(sum.v_reactivated - osum.v_reactivated));
(void)printf("%3lu ", rate(sum.v_swapin + sum.v_vnodein -
(osum.v_swapin + osum.v_vnodein)));
(void)printf("%3lu ", rate(sum.v_swapout + sum.v_vnodeout -
(osum.v_swapout + osum.v_vnodeout)));
(void)printf("%3lu ", rate(sum.v_tfree - osum.v_tfree));
(void)printf("%3lu ", rate(sum.v_pdpages - osum.v_pdpages));
dkstats();
(void)printf("%4lu %4lu %3lu ",
rate(sum.v_intr - osum.v_intr),
rate(sum.v_syscall - osum.v_syscall),
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);
}
}
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 notdef
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
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 <machine/cpu.h>
#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 VM object cache lookups\n", sum.v_lookups);
(void)printf("%9u VM object hits\n", sum.v_hits);
(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 intransit blocking page faults\n", sum.v_intrans);
(void)printf("%9u zero fill pages zeroed\n", sum.v_zfod);
(void)printf("%9u copy-on-write faults\n", sum.v_cow_faults);
(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 (%d%% pos + %d%% neg) system %d%% per-process\n",
"", PCT(nchstats.ncs_goodhits, nchtotal),
PCT(nchstats.ncs_neghits, nchtotal),
PCT(nchstats.ncs_pass2, nchtotal));
(void)printf("%9s deletions %d%%, falsehits %d%%, toolong %d%%\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 notdef
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) {
(void)fprintf(stderr, "vmstat: %s.\n", strerror(errno));
exit(1);
}
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);
}
/*
* These names are defined in <sys/malloc.h>.
*/
char *kmemnames[] = INITKMEMNAMES;
void
domem()
{
register struct kmembuckets *kp;
register struct kmemstats *ks;
register int i, j;
int len, size, first;
long totuse = 0, totfree = 0, totreq = 0;
char *name;
struct kmemstats kmemstats[M_LAST];
struct kmembuckets buckets[MINBUCKET + 16];
kread(X_KMEMBUCKETS, buckets, sizeof(buckets));
(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;
}
kread(X_KMEMSTAT, kmemstats, sizeof(kmemstats));
(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 < M_LAST; i++, ks++) {
if (ks->ks_calls == 0)
continue;
if ((ks->ks_size & j) == 0)
continue;
name = kmemnames[i] ? kmemnames[i] : "undefined";
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 < M_LAST; i++, ks++) {
if (ks->ks_calls == 0)
continue;
(void)printf("%13s%6ld%6ldK%7ldK%6ldK%9ld%5u%6u",
kmemnames[i] ? kmemnames[i] : "undefined",
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;
(void)fprintf(stderr,
"vmstat: symbol %s not defined\n", sym);
exit(1);
}
if (kvm_read(kd, namelist[nlx].n_value, addr, size) != size) {
sym = namelist[nlx].n_name;
if (*sym == '_')
++sym;
(void)fprintf(stderr, "vmstat: %s: %s\n", sym, kvm_geterr(kd));
exit(1);
}
}
void
usage()
{
(void)fprintf(stderr,
"usage: vmstat [-ims] [-c count] [-M core] \
[-N system] [-w wait] [disks]\n");
exit(1);
}
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