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fabian.frederick@gmx.fr vmstat code

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This commit is contained in:
albert
2003-05-31 00:38:55 +00:00
parent 044e7004c4
commit de2857aa89
6 changed files with 249 additions and 168 deletions
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227
vmstat.c
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@@ -1,5 +1,8 @@
// 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>
@@ -16,15 +19,11 @@
#include "proc/sysinfo.h"
#include "proc/version.h"
#include "vmstat.h"
#define BUFFSIZE 8192
#define FALSE 0
#define TRUE 1
static char buff[BUFFSIZE]; /* used in the procedures */
typedef unsigned long long jiff;
static int a_option; /* "-a" means "show active/inactive" */
static unsigned sleep_time = 1;
@@ -42,131 +41,14 @@ static void usage(void) {
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);
}
static void crash(const char *filename) NORETURN;
static void crash(const char *filename) {
perror(filename);
exit(EXIT_FAILURE);
}
////////////////////////////////////////////////////////////////////////
static void getrunners(unsigned int *restrict running, unsigned int *restrict blocked) {
static struct direct *ent;
DIR *proc;
*running=0;
*blocked=0;
if((proc=opendir("/proc"))==NULL) crash("/proc");
while(( ent=readdir(proc) )) {
unsigned size;
int fd;
char filename[80];
char c;
if (!isdigit(ent->d_name[0])) continue;
sprintf(filename, "/proc/%s/stat", ent->d_name);
fd = open(filename, O_RDONLY, 0);
if (fd == -1) continue;
read(fd,buff,BUFFSIZE-1);
sscanf(
buff,
"%*d %*s %c "
"%*d %*d %*d %*d %*d %*u %*u"
" %*u %*u %*u %*d %*d %*d %*d %*d %*d %*u %*u %*d %*u %u"
/* " %*u %*u %*u %*u %*u %*u %*u %*u %*u %*u %*u\n" */ ,
&c,
&size
);
close(fd);
if (c=='R') {
(*running)++;
continue;
}
if (c=='D') {
(*blocked)++;
continue;
}
}
closedir(proc);
}
static void getstat(jiff *restrict cuse, jiff *restrict cice, jiff *restrict csys, jiff *restrict cide, jiff *restrict ciow,
unsigned long *restrict pin, unsigned long *restrict pout, unsigned long *restrict s_in, unsigned long *restrict sout,
unsigned *restrict intr, unsigned *restrict ctxt,
unsigned int *restrict running, unsigned int *restrict blocked,
unsigned int *restrict btime, unsigned int *restrict processes) {
static int fd;
int need_vmstat_file = 0;
int need_proc_scan = 0;
const char* b;
buff[BUFFSIZE-1] = 0; /* ensure null termination in buffer */
if(fd){
lseek(fd, 0L, SEEK_SET);
}else{
fd = open("/proc/stat", O_RDONLY, 0);
if(fd == -1) crash("/proc/stat");
}
read(fd,buff,BUFFSIZE-1);
*intr = 0;
*ciow = 0; /* not separated out until the 2.5.41 kernel */
b = strstr(buff, "cpu ");
if(b) sscanf(b, "cpu %Lu %Lu %Lu %Lu %Lu", cuse, cice, csys, cide, ciow);
b = strstr(buff, "page ");
if(b) sscanf(b, "page %lu %lu", pin, pout);
else need_vmstat_file = 1;
b = strstr(buff, "swap ");
if(b) sscanf(b, "swap %lu %lu", s_in, sout);
else need_vmstat_file = 1;
b = strstr(buff, "intr ");
if(b) sscanf(b, "intr %u", intr);
b = strstr(buff, "ctxt ");
if(b) sscanf(b, "ctxt %u", ctxt);
b = strstr(buff, "btime ");
if(b) sscanf(b, "btime %u", btime);
b = strstr(buff, "processes ");
if(b) sscanf(b, "processes %u", processes);
b = strstr(buff, "procs_running ");
if(b) sscanf(b, "procs_running %u", running);
else need_proc_scan = 1;
b = strstr(buff, "procs_blocked ");
if(b) sscanf(b, "procs_blocked %u", blocked);
else need_proc_scan = 1;
if(need_proc_scan){ /* Linux 2.5.46 (approximately) and below */
getrunners(running, blocked);
}
(*running)--; // exclude vmstat itself
if(need_vmstat_file){ /* Linux 2.5.40-bk4 and above */
vminfo();
*pin = vm_pgpgin;
*pout = vm_pgpgout;
*s_in = vm_pswpin;
*sout = vm_pswpout;
}
}
//////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////
#if 0
// produce: " 6 ", "123 ", "123k ", etc.
@@ -248,6 +130,17 @@ static void new_header(void){
);
}
////////////////////////////////////////////////////////////////////////////
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 */
@@ -266,11 +159,13 @@ static void new_format(void) {
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;
@@ -279,11 +174,11 @@ static void new_format(void) {
divo2= Div/2UL;
printf(format,
running, blocked,
kb_swap_used, kb_main_free,
a_option?kb_inactive:kb_main_buffers,
a_option?kb_active:kb_main_cached,
(unsigned)( (*pswpin * kb_per_page * hz + divo2) / Div ),
(unsigned)( (*pswpout * kb_per_page * hz + divo2) / Div ),
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 ),
@@ -300,11 +195,13 @@ static void new_format(void) {
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];
@@ -324,25 +221,24 @@ static void new_format(void) {
divo2= Div/2UL;
printf(format,
running, blocked,
kb_swap_used,kb_main_free,
a_option?kb_inactive:kb_main_buffers,
a_option?kb_active:kb_main_cached,
(unsigned)( ( (pswpin [tog] - pswpin [!tog])*kb_per_page+sleep_half )/sleep_time ),
(unsigned)( ( (pswpout[tog] - pswpout[!tog])*kb_per_page+sleep_half )/sleep_time ),
(unsigned)( ( pgpgin [tog] - pgpgin [!tog] +sleep_half )/sleep_time ),
(unsigned)( ( pgpgout[tog] - pgpgout[!tog] +sleep_half )/sleep_time ),
(unsigned)( ( intr [tog] - intr [!tog] +sleep_half )/sleep_time ),
(unsigned)( ( ctxt [tog] - ctxt [!tog] +sleep_half )/sleep_time ),
(unsigned)( (100*duse+divo2)/Div ),
(unsigned)( (100*dsys+divo2)/Div ),
(unsigned)( (100*didl+divo2)/Div ),
(unsigned)( (100*diow+divo2)/Div )
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;
@@ -351,21 +247,23 @@ static void sum_format(void) {
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 kB total memory\n", kb_main_total);
printf("%13lu kB used memory\n", kb_main_used);
printf("%13lu kB active memory\n", kb_active);
printf("%13lu kB inactive memory\n", kb_inactive);
printf("%13lu kB free memory\n", kb_main_free);
printf("%13lu kB buffer memory\n", kb_main_buffers);
printf("%13lu kB swap cache\n", kb_main_cached);
printf("%13lu kB total swap\n", kb_swap_total);
printf("%13lu kB used swap\n", kb_swap_used);
printf("%13lu kB free swap\n", kb_swap_free);
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);
@@ -380,7 +278,6 @@ static void sum_format(void) {
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;
@@ -392,6 +289,7 @@ static void fork_format(void) {
&intr, &ctxt,
&running, &blocked,
&btime, &processes);
printf("%13u forks\n", processes);
}
@@ -412,6 +310,7 @@ int main(int argc, char *argv[]) {
for (argv++;*argv;argv++) {
if ('-' ==(**argv)) {
switch (*(++(*argv))) {
case 'V':
display_version();
exit(0);
@@ -427,6 +326,22 @@ int main(int argc, char *argv[]) {
/* 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();