procps/vmstat.c
2003-05-31 00:38:55 +00:00

382 lines
11 KiB
C

// old: "Copyright 1994 by Henry Ware <al172@yfn.ysu.edu>. Copyleft same year."
// most code copyright 2002 Albert Cahalan
// 27/05/2003 (Fabian) : Add unit conversion + interface
// Export proc/stat access to libproc
// Adapt vmstat helpfile
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <assert.h>
#include <fcntl.h>
#include <limits.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/dir.h>
#include <dirent.h>
#include "proc/sysinfo.h"
#include "proc/version.h"
#include "vmstat.h"
#define FALSE 0
#define TRUE 1
static int a_option; /* "-a" means "show active/inactive" */
static unsigned sleep_time = 1;
static unsigned long num_updates;
static unsigned int height; // window height
static unsigned int moreheaders=TRUE;
/////////////////////////////////////////////////////////////////////////
static void usage(void) NORETURN;
static void usage(void) {
fprintf(stderr,"usage: vmstat [-V] [-n] [delay [count]]\n");
fprintf(stderr," -V prints version.\n");
fprintf(stderr," -n causes the headers not to be reprinted regularly.\n");
fprintf(stderr," -a print inactive/active page stats.\n");
fprintf(stderr," -S unit size\n");
fprintf(stderr," delay is the delay between updates in seconds. \n");
fprintf(stderr," unit size k:1000 K:1024 m:1000000 M:1048576 (default is K)\n");
fprintf(stderr," count is the number of updates.\n");
exit(EXIT_FAILURE);
}
/////////////////////////////////////////////////////////////////////////////
#if 0
// produce: " 6 ", "123 ", "123k ", etc.
static int format_1024(unsigned long long val64, char *restrict dst){
unsigned oldval;
const char suffix[] = " kmgtpe";
unsigned level = 0;
unsigned val32;
if(val64 < 1000){ // special case to avoid "6.0 " when plain " 6 " would do
val32 = val64;
return sprintf(dst,"%3u ",val32);
}
while(val64 > 0xffffffffull){
level++;
val64 /= 1024;
}
val32 = val64;
while(val32 > 999){
level++;
oldval = val32;
val32 /= 1024;
}
if(val32 < 10){
unsigned fract = (oldval % 1024) * 10 / 1024;
return sprintf(dst, "%u.%u%c ", val32, fract, suffix[level]);
}
return sprintf(dst, "%3u%c ", val32, suffix[level]);
}
// produce: " 6 ", "123 ", "123k ", etc.
static int format_1000(unsigned long long val64, char *restrict dst){
unsigned oldval;
const char suffix[] = " kmgtpe";
unsigned level = 0;
unsigned val32;
if(val64 < 1000){ // special case to avoid "6.0 " when plain " 6 " would do
val32 = val64;
return sprintf(dst,"%3u ",val32);
}
while(val64 > 0xffffffffull){
level++;
val64 /= 1000;
}
val32 = val64;
while(val32 > 999){
level++;
oldval = val32;
val32 /= 1000;
}
if(val32 < 10){
unsigned fract = (oldval % 1000) / 100;
return sprintf(dst, "%u.%u%c ", val32, fract, suffix[level]);
}
return sprintf(dst, "%3u%c ", val32, suffix[level]);
}
#endif
static void new_header(void){
printf("procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----\n");
printf(
"%2s %2s %6s %6s %6s %6s %4s %4s %5s %5s %4s %5s %2s %2s %2s %2s\n",
"r","b",
"swpd", "free", a_option?"inact":"buff", a_option?"active":"cache",
"si","so",
"bi","bo",
"in","cs",
"us","sy","id","wa"
);
}
////////////////////////////////////////////////////////////////////////////
unsigned long unitConvert(unsigned int kbsize)
{
float cvSize;
cvSize=(float)kbsize/dataUnit*1024;
return ((unsigned long) cvSize);
}
////////////////////////////////////////////////////////////////////////////
static void new_format(void) {
const char format[]="%2u %2u %6lu %6lu %6lu %6lu %4u %4u %5u %5u %4u %5u %2u %2u %2u %2u\n";
unsigned int tog=0; /* toggle switch for cleaner code */
unsigned int i;
unsigned int hz = Hertz;
unsigned int running,blocked,dummy_1,dummy_2;
jiff cpu_use[2], cpu_nic[2], cpu_sys[2], cpu_idl[2], cpu_iow[2];
jiff duse, dsys, didl, diow, Div, divo2;
unsigned long pgpgin[2], pgpgout[2], pswpin[2], pswpout[2];
unsigned int intr[2], ctxt[2];
unsigned int sleep_half;
unsigned long kb_per_page = sysconf(_SC_PAGESIZE) / 1024ul;
int debt = 0; // handle idle ticks running backwards
sleep_half=(sleep_time/2);
new_header();
meminfo();
getstat(cpu_use,cpu_nic,cpu_sys,cpu_idl,cpu_iow,
pgpgin,pgpgout,pswpin,pswpout,
intr,ctxt,
&running,&blocked,
&dummy_1, &dummy_2);
duse= *cpu_use + *cpu_nic;
dsys= *cpu_sys;
didl= *cpu_idl;
diow= *cpu_iow;
Div= duse+dsys+didl+diow;
divo2= Div/2UL;
printf(format,
running, blocked,
unitConvert(kb_swap_used), unitConvert(kb_main_free),
unitConvert(a_option?kb_inactive:kb_main_buffers),
unitConvert(a_option?kb_active:kb_main_cached),
(unsigned)( (*pswpin * unitConvert(kb_per_page) * hz + divo2) / Div ),
(unsigned)( (*pswpout * unitConvert(kb_per_page) * hz + divo2) / Div ),
(unsigned)( (*pgpgin * hz + divo2) / Div ),
(unsigned)( (*pgpgout * hz + divo2) / Div ),
(unsigned)( (*intr * hz + divo2) / Div ),
(unsigned)( (*ctxt * hz + divo2) / Div ),
(unsigned)( (100*duse + divo2) / Div ),
(unsigned)( (100*dsys + divo2) / Div ),
(unsigned)( (100*didl + divo2) / Div ),
(unsigned)( (100*diow + divo2) / Div )
);
for(i=1;i<num_updates;i++) { /* \\\\\\\\\\\\\\\\\\\\ main loop ////////////////// */
sleep(sleep_time);
if (moreheaders && ((i%height)==0)) new_header();
tog= !tog;
meminfo();
getstat(cpu_use+tog,cpu_nic+tog,cpu_sys+tog,cpu_idl+tog,cpu_iow+tog,
pgpgin+tog,pgpgout+tog,pswpin+tog,pswpout+tog,
intr+tog,ctxt+tog,
&running,&blocked,
&dummy_1,&dummy_2);
duse= cpu_use[tog]-cpu_use[!tog] + cpu_nic[tog]-cpu_nic[!tog];
dsys= cpu_sys[tog]-cpu_sys[!tog];
didl= cpu_idl[tog]-cpu_idl[!tog];
diow= cpu_iow[tog]-cpu_iow[!tog];
/* idle can run backwards for a moment -- kernel "feature" */
if(debt){
didl = (int)didl + debt;
debt = 0;
}
if( (int)didl < 0 ){
debt = (int)didl;
didl = 0;
}
Div= duse+dsys+didl+diow;
divo2= Div/2UL;
printf(format,
running, blocked,
unitConvert(kb_swap_used),unitConvert(kb_main_free),
unitConvert(a_option?kb_inactive:kb_main_buffers),
unitConvert(a_option?kb_active:kb_main_cached),
(unsigned)( ( (pswpin [tog] - pswpin [!tog])*unitConvert(kb_per_page)+sleep_half )/sleep_time ), /*si*/
(unsigned)( ( (pswpout[tog] - pswpout[!tog])*unitConvert(kb_per_page)+sleep_half )/sleep_time ), /*so*/
(unsigned)( ( pgpgin [tog] - pgpgin [!tog] +sleep_half )/sleep_time ), /*bi*/
(unsigned)( ( pgpgout[tog] - pgpgout[!tog] +sleep_half )/sleep_time ), /*bo*/
(unsigned)( ( intr [tog] - intr [!tog] +sleep_half )/sleep_time ), /*in*/
(unsigned)( ( ctxt [tog] - ctxt [!tog] +sleep_half )/sleep_time ), /*cs*/
(unsigned)( (100*duse+divo2)/Div ), /*us*/
(unsigned)( (100*dsys+divo2)/Div ), /*sy*/
(unsigned)( (100*didl+divo2)/Div ), /*id*/
(unsigned)( (100*diow+divo2)/Div ) /*wa*/
);
}
}
////////////////////////////////////////////////////////////////////////////
static void sum_format(void) {
unsigned int running, blocked, btime, processes;
jiff cpu_use, cpu_nic, cpu_sys, cpu_idl, cpu_iow;
unsigned long pgpgin, pgpgout, pswpin, pswpout;
unsigned int intr, ctxt;
meminfo();
getstat(&cpu_use, &cpu_nic, &cpu_sys, &cpu_idl, &cpu_iow,
&pgpgin, &pgpgout, &pswpin, &pswpout,
&intr, &ctxt,
&running, &blocked,
&btime, &processes);
printf("%13lu %s total memory\n", unitConvert(kb_main_total),szDataUnit);
printf("%13lu %s used memory\n", unitConvert(kb_main_used),szDataUnit);
printf("%13lu %s active memory\n", unitConvert(kb_active),szDataUnit);
printf("%13lu %s inactive memory\n", unitConvert(kb_inactive),szDataUnit);
printf("%13lu %s free memory\n", unitConvert(kb_main_free),szDataUnit);
printf("%13lu %s buffer memory\n", unitConvert(kb_main_buffers),szDataUnit);
printf("%13lu %s swap cache\n", unitConvert(kb_main_cached),szDataUnit);
printf("%13lu %s total swap\n", unitConvert(kb_swap_total),szDataUnit);
printf("%13lu %s used swap\n", unitConvert(kb_swap_used),szDataUnit);
printf("%13lu %s free swap\n", unitConvert(kb_swap_free),szDataUnit);
printf("%13Lu non-nice user cpu ticks\n", cpu_use);
printf("%13Lu nice user cpu ticks\n", cpu_nic);
printf("%13Lu system cpu ticks\n", cpu_sys);
printf("%13Lu idle cpu ticks\n", cpu_idl);
printf("%13Lu IO-wait cpu ticks\n", cpu_iow);
printf("%13lu pages paged in\n", pgpgin);
printf("%13lu pages paged out\n", pgpgout);
printf("%13lu pages swapped in\n", pswpin);
printf("%13lu pages swapped out\n", pswpout);
printf("%13u interrupts\n", intr);
printf("%13u CPU context switches\n", ctxt);
printf("%13u boot time\n", btime);
printf("%13u forks\n", processes);
}
static void fork_format(void) {
unsigned int running, blocked, btime, processes;
jiff cpu_use, cpu_nic, cpu_sys, cpu_idl, cpu_iow;
unsigned long pgpgin, pgpgout, pswpin, pswpout;
unsigned int intr, ctxt;
getstat(&cpu_use, &cpu_nic, &cpu_sys, &cpu_idl, &cpu_iow,
&pgpgin, &pgpgout, &pswpin, &pswpout,
&intr, &ctxt,
&running, &blocked,
&btime, &processes);
printf("%13u forks\n", processes);
}
static int winhi(void) {
struct winsize win;
int rows = 24;
if (ioctl(1, TIOCGWINSZ, &win) != -1 && win.ws_row > 0)
rows = win.ws_row;
return rows;
}
int main(int argc, char *argv[]) {
argc=0; /* redefined as number of integer arguments */
for (argv++;*argv;argv++) {
if ('-' ==(**argv)) {
switch (*(++(*argv))) {
case 'V':
display_version();
exit(0);
case 'a':
/* active/inactive mode */
a_option=1;
break;
case 'f':
// FIXME: check for conflicting args
fork_format();
exit(0);
case 'n':
/* print only one header */
moreheaders=FALSE;
break;
case 'S':
if (argv[1]){
++argv;
if (!strcmp(*argv, "k")) dataUnit=UNIT_k;
else if (!strcmp(*argv, "K")) dataUnit=UNIT_K;
else if (!strcmp(*argv, "m")) dataUnit=UNIT_m;
else if (!strcmp(*argv, "M")) dataUnit=UNIT_M;
else {fprintf(stderr, "-S requires k, K, m or M (default is kb)\n");
exit(EXIT_FAILURE);
}
strcpy(szDataUnit, *argv);
}else {fprintf(stderr, "-S requires an argument\n");
exit(EXIT_FAILURE);
}
break;
case 's':
// FIXME: check for conflicting args
sum_format();
exit(0);
default:
/* no other aguments defined yet. */
usage();
}
} else {
argc++;
switch (argc) {
case 1:
if ((sleep_time = atoi(*argv)) == 0)
usage();
num_updates = ULONG_MAX;
break;
case 2:
num_updates = atol(*argv);
break;
default:
usage();
} /* switch */
}
}
if (moreheaders) {
int tmp=winhi()-3;
height=((tmp>0)?tmp:22);
}
setlinebuf(stdout);
new_format();
return 0;
}