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#1
06-21-2007
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getrusage()
Hi,
Can someone gives me an example for the use of getrusage() under HP-UX and AIX. I am using this function to get system statistics. Thank you 
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#2
06-21-2007
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Code:
#include <stdlib.h>
#include <sys/resource.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
void process(struct rusage *p, char *when)
{
printf("%s\n", when);
printf(" /* user time used */ %8d %8d\n", p->ru_utime.tv_sec,p->ru_utime.tv_usec );
printf(" /* system time used */ %8d %8d\n", p->ru_stime.tv_sec,p->ru_stime.tv_usec );
printf(" /* integral shared memory size */ %8d\n", p->ru_ixrss );
printf(" /* integral unshared data */ %8d\n", p->ru_idrss );
printf(" /* integral unshared stack */ %8d\n", p->ru_isrss );
printf(" /* page reclaims */ %8d\n", p->ru_minflt );
printf(" /* page faults */ %8d\n", p->ru_majflt );
printf(" /* swaps */ %8d\n", p->ru_nswap );
printf(" /* block input operations */ %8d\n", p->ru_inblock );
printf(" /* block output operations */ %8d\n", p->ru_oublock );
printf(" /* # of characters read/written */ %8d\n", p->ru_ioch );
printf(" /* messages sent */ %8d\n", p->ru_msgsnd );
printf(" /* messages received */ %8d\n", p->ru_msgrcv );
printf(" /* signals received */ %8d\n", p->ru_nsignals );
printf(" /* voluntary context switches */ %8d\n", p->ru_nvcsw );
printf(" /* involuntary */ %8d\n", p->ru_nivcsw );
}
int main()
{
int ret;
char *buf;
int i=0;
int who= RUSAGE_SELF;
struct rusage usage;
struct rusage *p=&usage;
ret=getrusage(who,p);
process(p, "-------------before");
/* do stuff here */
ret=getrusage(who,p);
process(p, "\n\n-------------after we run foo1");
return 0;
}
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#3
06-21-2007
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Thank you
I tested this code but I can't understand why the user time and the system time are the same before and after execution. -------------before /* user time used */ 0 10000 /* system time used */ 0 10000 /* integral shared memory size */ 0 /* integral unshared data */ 0 /* integral unshared stack */ 0 /* page reclaims */ 149 /* page faults */ 1 /* swaps */ 0 /* block input operations */ 0 /* block output operations */ 0 /* # of characters read/written */ 1676 /* messages sent */ 0 /* messages received */ 0 /* signals received */ 0 /* voluntary context switches */ 1 /* involuntary */ 14 -------------after we run foo1 /* user time used */ 0 10000 /* system time used */ 0 10000 /* integral shared memory size */ 0 /* integral unshared data */ 0 /* integral unshared stack */ 0 /* page reclaims */ 149 /* page faults */ 2 /* swaps */ 0 /* block input operations */ 0 /* block output operations */ 0 /* # of characters read/written */ 2500 /* messages sent */ 0 /* messages received */ 0 /* signals received */ 0 /* voluntary context switches */ 2 /* involuntary */ 14 Normally I must calculate the difference between the two statistics to obtain statistics of my program execution. So I will obtain 0 for the user time and system time ???
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