4.1cBSD/usr/src/ucb/vmstat.c
#ifndef lint
static char *sccsid = "@(#)vmstat.c 4.9 (Berkeley) 2/9/83";
#endif
#include <stdio.h>
#include <sys/param.h>
#include <sys/vm.h>
#include <sys/dk.h>
#include <nlist.h>
#include <sys/buf.h>
#ifdef vax
#include <vaxuba/ubavar.h>
#include <vaxmba/mbavar.h>
#endif
#ifdef sun
#include <sundev/mbvar.h>
#endif
struct nlist nl[] = {
#define X_CPTIME 0
{ "_cp_time" },
#define X_RATE 1
{ "_rate" },
#define X_TOTAL 2
{ "_total" },
#define X_DEFICIT 3
{ "_deficit" },
#define X_FORKSTAT 4
{ "_forkstat" },
#define X_SUM 5
{ "_sum" },
#define X_FIRSTFREE 6
{ "_firstfree" },
#define X_MAXFREE 7
{ "_maxfree" },
#define X_BOOTTIME 8
{ "_boottime" },
#define X_DKXFER 9
{ "_dk_xfer" },
#define X_REC 10
{ "_rectime" },
#define X_PGIN 11
{ "_pgintime" },
#define X_HZ 12
{ "_hz" },
#ifdef vax
#define X_MBDINIT 13
{ "_mbdinit" },
#define X_UBDINIT 14
{ "_ubdinit" },
#endif
#ifdef sun
#define X_MBDINIT 13
{ "_mbdinit" },
#endif
{ "" },
};
char dr_name[DK_NDRIVE][10];
char dr_unit[DK_NDRIVE];
double stat1();
int firstfree, maxfree;
int hz;
struct
{
int busy;
long time[CPUSTATES];
long xfer[DK_NDRIVE];
struct vmmeter Rate;
struct vmtotal Total;
struct vmmeter Sum;
struct forkstat Forkstat;
unsigned rectime;
unsigned pgintime;
} s, s1, z;
#define rate s.Rate
#define total s.Total
#define sum s.Sum
#define forkstat s.Forkstat
struct vmmeter osum;
int zero;
int deficit;
double etime;
int mf;
int swflag;
main(argc, argv)
int argc;
char **argv;
{
time_t now;
int lines;
extern char *ctime();
register i,j;
int iter, nintv;
time_t boottime;
double f1, f2;
long t;
extern char _sobuf[];
#ifdef sun
swflag = 1;
#endif
setbuf(stdout, _sobuf);
nlist("/vmunix", nl);
if(nl[0].n_type == 0) {
printf("no /vmunix namelist\n");
exit(1);
}
mf = open("/dev/kmem", 0);
if(mf < 0) {
printf("cannot open /dev/kmem\n");
exit(1);
}
iter = 0;
argc--, argv++;
while (argc>0 && argv[0][0]=='-') {
char *cp = *argv++;
argc--;
while (*++cp) switch (*cp) {
case 'S':
swflag = 1 - swflag;
break;
case 't':
dotimes();
exit(0);
case 'z':
close(mf);
mf = open("/dev/kmem", 2);
lseek(mf, (long)nl[X_SUM].n_value, 0);
write(mf, &z.Sum, sizeof z.Sum);
exit(0);
case 'f':
doforkst();
exit(0);
case 's':
dosum();
exit(0);
default:
fprintf(stderr, "usage: vmstat [ -fs ] [ interval ] [ count]\n");
exit(1);
}
}
if(argc > 1)
iter = atoi(argv[1]);
lseek(mf, (long)nl[X_FIRSTFREE].n_value, 0);
read(mf, &firstfree, sizeof firstfree);
lseek(mf, (long)nl[X_MAXFREE].n_value, 0);
read(mf, &maxfree, sizeof maxfree);
lseek(mf, (long)nl[X_BOOTTIME].n_value, 0);
read(mf, &boottime, sizeof boottime);
lseek(mf, (long)nl[X_HZ].n_value, 0);
read(mf, &hz, sizeof hz);
for (i = 0; i < DK_NDRIVE; i++) {
strcpy(dr_name[i], "xx");
dr_unit[i] = i;
}
read_names();
time(&now);
nintv = now - boottime;
if (nintv <= 0 || nintv > 60*60*24*365*10) {
printf("Time makes no sense... namelist must be wrong.\n");
exit(1);
}
reprint:
lines = 20;
/* s1 = z; */
printf("\
procs memory page disk faults cpu\n\
r b w avm fre %5s pi po fr de sr %c%d %c%d %c%d %c%d in sy cs us sy id\n\
", swflag ? "si so" : "re at",
dr_name[0][0], dr_unit[0], dr_name[1][0], dr_unit[1], dr_name[2][0], dr_unit[2], dr_name[3][0], dr_unit[3]);
loop:
lseek(mf, (long)nl[X_CPTIME].n_value, 0);
read(mf, s.time, sizeof s.time);
lseek(mf, (long)nl[X_DKXFER].n_value, 0);
read(mf, s.xfer, sizeof s.xfer);
if (nintv != 1) {
lseek(mf, (long)nl[X_SUM].n_value, 0);
read(mf, &rate, sizeof rate);
} else {
lseek(mf, (long)nl[X_RATE].n_value, 0);
read(mf, &rate, sizeof rate);
}
lseek(mf, (long)nl[X_TOTAL].n_value, 0);
read(mf, &total, sizeof total);
osum = sum;
lseek(mf, (long)nl[X_SUM].n_value, 0);
read(mf, &sum, sizeof sum);
lseek(mf, (long)nl[X_DEFICIT].n_value, 0);
read(mf, &deficit, sizeof deficit);
etime = 0;
for (i=0; i < DK_NDRIVE; i++) {
t = s.xfer[i];
s.xfer[i] -= s1.xfer[i];
s1.xfer[i] = t;
}
for (i=0; i < CPUSTATES; i++) {
t = s.time[i];
s.time[i] -= s1.time[i];
s1.time[i] = t;
etime += s.time[i];
}
if(etime == 0.)
etime = 1.;
printf("%2d%2d%2d", total.t_rq, total.t_dw+total.t_pw, total.t_sw);
#define pgtok(a) ((a)*NBPG/1024)
printf("%6d%5d", pgtok(total.t_avm), pgtok(total.t_free));
printf("%4d%3d",
swflag ?
sum.v_swpin-osum.v_swpin :
(rate.v_pgrec - (rate.v_xsfrec+rate.v_xifrec))/nintv,
swflag ?
sum.v_swpout-osum.v_swpout :
(rate.v_xsfrec+rate.v_xifrec)/nintv);
printf("%4d", pgtok(rate.v_pgpgin)/nintv);
printf("%4d%4d%4d%4d", pgtok(rate.v_pgpgout)/nintv,
pgtok(rate.v_dfree)/nintv, pgtok(deficit), rate.v_scan/nintv);
etime /= 60.;
for(i=0; i<4; i++)
stats(i);
#ifdef sun
printf("%4d%4d", (rate.v_intr/nintv), rate.v_syscall/nintv);
#endif
#ifdef vax
printf("%4d%4d", (rate.v_intr/nintv) - hz, rate.v_syscall/nintv);
#endif
printf("%4d", rate.v_swtch/nintv);
for(i=0; i<CPUSTATES; i++) {
float f = stat1(i);
if (i == 0) { /* US+NI */
i++;
f += stat1(i);
}
printf("%3.0f", f);
}
printf("\n");
fflush(stdout);
contin:
nintv = 1;
--iter;
if(iter)
if(argc > 0) {
sleep(atoi(argv[0]));
if (--lines <= 0)
goto reprint;
goto loop;
}
}
dotimes()
{
lseek(mf, (long)nl[X_REC].n_value, 0);
read(mf, &s.rectime, sizeof s.rectime);
lseek(mf, (long)nl[X_PGIN].n_value, 0);
read(mf, &s.pgintime, sizeof s.pgintime);
lseek(mf, (long)nl[X_SUM].n_value, 0);
read(mf, &sum, sizeof sum);
printf("%d reclaims, %d total time (usec)\n", sum.v_pgrec, s.rectime);
printf("average: %d usec / reclaim\n", s.rectime/sum.v_pgrec);
printf("\n");
printf("%d page ins, %d total time (msec)\n",sum.v_pgin, s.pgintime/10);
printf("average: %8.1f msec / page in\n", s.pgintime/(sum.v_pgin*10.0));
}
dosum()
{
lseek(mf, (long)nl[X_SUM].n_value, 0);
read(mf, &sum, sizeof sum);
printf("%9d swap ins\n", sum.v_swpin);
printf("%9d swap outs\n", sum.v_swpout);
printf("%9d pages swapped in\n", sum.v_pswpin / CLSIZE);
printf("%9d pages swapped out\n", sum.v_pswpout / CLSIZE);
printf("%9d total address trans. faults taken\n", sum.v_faults);
printf("%9d page ins\n", sum.v_pgin);
printf("%9d page outs\n", sum.v_pgout);
printf("%9d pages paged in\n", sum.v_pgpgin);
printf("%9d pages paged out\n", sum.v_pgpgout);
printf("%9d sequential process pages freed\n", sum.v_seqfree);
printf("%9d total reclaims\n", sum.v_pgrec);
printf("%9d reclaims from free list\n", sum.v_pgfrec);
printf("%9d intransit blocking page faults\n", sum.v_intrans);
printf("%9d zero fill pages created\n", sum.v_nzfod / CLSIZE);
printf("%9d zero fill page faults\n", sum.v_zfod / CLSIZE);
printf("%9d executable fill pages created\n", sum.v_nexfod / CLSIZE);
printf("%9d executable fill page faults\n", sum.v_exfod / CLSIZE);
printf("%9d swap text pages found in free list\n", sum.v_xsfrec);
printf("%9d inode text pages found in free list\n", sum.v_xifrec);
printf("%9d file fill pages created\n", sum.v_nvrfod / CLSIZE);
printf("%9d file fill page faults\n", sum.v_vrfod / CLSIZE);
printf("%9d pages examined by the clock daemon\n", sum.v_scan);
printf("%9d revolutions of the clock hand\n", sum.v_rev);
printf("%9d pages freed by the clock daemon\n", sum.v_dfree / CLSIZE);
printf("%9d cpu context switches\n", sum.v_swtch);
printf("%9d device interrupts\n", sum.v_intr);
printf("%9d pseduo-dma dz interrupts\n", sum.v_pdma);
printf("%9d traps\n", sum.v_trap);
printf("%9d system calls\n", sum.v_syscall);
}
doforkst()
{
lseek(mf, (long)nl[X_FORKSTAT].n_value, 0);
read(mf, &forkstat, sizeof forkstat);
printf("%d forks, %d pages, average=%.2f\n",
forkstat.cntfork, forkstat.sizfork,
(float) forkstat.sizfork / forkstat.cntfork);
printf("%d vforks, %d pages, average=%.2f\n",
forkstat.cntvfork, forkstat.sizvfork,
(float)forkstat.sizvfork / forkstat.cntvfork);
}
stats(dn)
{
if (dn >= DK_NDRIVE) {
printf(" 0");
return;
}
printf("%3.0f", s.xfer[dn]/etime);
}
double
stat1(row)
{
double t;
register i;
t = 0;
for(i=0; i<CPUSTATES; i++)
t += s.time[i];
if(t == 0.)
t = 1.;
return(s.time[row]*100./t);
}
pct(top, bot)
{
if (bot == 0)
return (0);
return ((top * 100) / bot);
}
#define steal(where, var) lseek(mf, where, 0); read(mf, &var, sizeof var);
/*
* Read the drive names out of kmem.
*/
#ifdef vax
read_names()
{
struct mba_device mdev;
register struct mba_device *mp;
struct mba_driver mdrv;
short two_char;
char *cp = (char *) &two_char;
struct uba_device udev, *up;
struct uba_driver udrv;
mp = (struct mba_device *) nl[X_MBDINIT].n_value;
up = (struct uba_device *) nl[X_UBDINIT].n_value;
if (up == 0) {
fprintf(stderr, "vmstat: Disk init info not in namelist\n");
exit(1);
}
if (mp) for (;;) {
steal(mp++, mdev);
if (mdev.mi_driver == 0)
break;
if (mdev.mi_dk < 0 || mdev.mi_alive == 0)
continue;
steal(mdev.mi_driver, mdrv);
steal(mdrv.md_dname, two_char);
sprintf(dr_name[mdev.mi_dk], "%c%c", cp[0], cp[1]);
dr_unit[mdev.mi_dk] = mdev.mi_unit;
}
for (;;) {
steal(up++, udev);
if (udev.ui_driver == 0)
break;
if (udev.ui_dk < 0 || udev.ui_alive == 0)
continue;
steal(udev.ui_driver, udrv);
steal(udrv.ud_dname, two_char);
sprintf(dr_name[udev.ui_dk], "%c%c", cp[0], cp[1]);
dr_unit[udev.ui_dk] = udev.ui_unit;
}
}
#endif
#ifdef sun
read_names()
{
struct mb_device mdev;
register struct mb_device *mp;
struct mb_driver mdrv;
short two_char;
char *cp = (char *) &two_char;
mp = (struct mb_device *) nl[X_MBDINIT].n_value;
if (mp == 0) {
fprintf(stderr, "iostat: Disk init info not in namelist\n");
exit(1);
}
for (;;) {
steal(mp++, mdev);
if (mdev.md_driver == 0)
break;
if (mdev.md_dk < 0 || mdev.md_alive == 0)
continue;
steal(mdev.md_driver, mdrv);
steal(mdrv.mdr_dname, two_char);
sprintf(dr_name[mdev.md_dk], "%c%c%d", cp[0], cp[1]);
dr_unit[mdev.md_dk] = mdev.md_unit;
}
}
#endif