on hpunix cpu usage fields

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Operating Systems HP-UX on hpunix cpu usage fields
# 1  
Old 04-05-2002
Question on hpunix cpu usage fields

i have found a structure contained in file global _pstat_body.h at the path
/usr/include/sys/pstat which is
named __pst_dynamic . A field by name psd_cpu_time is
an array of maximum cpu states the kernel supports .
i,e psd_cpu_time [PST_MAX_CPUSTATES] specify all
the cpu timings in an array . i wanted to know which
index into the array spesify which element state i,e
whether the psd_cpu_time[0] is cpu time in user mode
and psd_cpu_time[1] is cpu time in kernel mode and so on .
# 2  
Old 04-05-2002
Look at the first few lines in /usr/include/sys/sysinfo.h
# 3  
Old 04-06-2002
i needed a system call

thanks for your reply perderabo

you have shown me a new structure ,
as i saw the fields of structure ksysinfo but i could't find
the system call which fills that structure .will you please help me with that .
# 4  
Old 04-10-2002
# 5  
Old 04-11-2002
Question error return from nlist call

hello mr perderabo
thanks for showing me the new tool .
my program written was reffered from your program ,
The call nlist is returning error . please see to my
code and please specify the reason and the
alternative if any .

--------------------------------------------------------------------------------#include <sys/param.h>
#include <sys/unistd.h>
#include <nlist.h>
#include <sys/sysinfo.h>
#include <stdio.h>
#include <fcntl.h>
#include <sys/vmmeter.h>
int fp;
static struct nlist nl[2] = { {"ksysinfo"}, {NULL} };
struct ksysinfo ksysinfo;
int off;
int check ;
fp=open("/dev/kmem", O_RDONLY);
check = nlist("/stand/vmunix",nl);
printf("check = %d\n",check );
read(fp,&ksysinfo,sizeof(struct ksysinfo));



Last edited by vish_shan; 04-11-2002 at 11:15 AM..
# 6  
Old 04-11-2002
I tried your code and it worked for me. If nlist returns a zero that is good. Are you getting -1? Are you running as root? You really need to check the result from the open as well.

But the values in that structure were all zeroes. I don't think it is being used. This is the touble with poking around in the kernel. HP changes stuff in there at will. If you get want the cpu times, I would use pstat(). If you must extract them via these calls, I think, that the stuff in sys/dk.h is a better choice.
# 7  
Old 04-11-2002
nlist return

no ,nlist is returning -1 and i am not running as root . thanks for your reply .

Last edited by vish_shan; 04-11-2002 at 11:33 AM..
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