topic Re: -f option in ps in Operating System - HP-UX

-f option in ps

Praveen Bezawada — Wed, 29 Aug 2001 13:58:47 GMT

Hi
The man of ps say the -f displays
user,pid,ppid,cpu,stime,tty,time,args
and 'cpu' is defined as 'Processor utilization for scheduling'.I had understood that it means that the value under CPU is the cpu number on which the process is running.
Am I correct ?
But the value under cpu for some processes is over 100 !!!! Why is it so.

Thanks in advance
...BPK...

Re: -f option in ps

Sridhar Bhaskarla — Wed, 29 Aug 2001 14:11:54 GMT

I think it is not the processor number but the
utilization for scheduling the job.

Use XPG4 version for better output.

-Sri

Re: -f option in ps

Praveen Bezawada — Wed, 29 Aug 2001 14:17:01 GMT

Hi
But some of the processes which are using more CPU ( as seen from the glance ) show a value of 0.

Re: -f option in ps

Paula J Frazer-Campbell — Wed, 29 Aug 2001 14:21:14 GMT

Hi

The CPU column is not the cpu utilisation but:-

cpu Processor utilization for scheduling. The default
heading for this column is C.

See man ps

paula

Re: -f option in ps

eran maor — Wed, 29 Aug 2001 14:21:45 GMT

Hi

When the system recalculates process priorities , Processes that have recently used the CPU (higher C column values), will
have lower priorities, and processes that have been waiting for the CPU (lower C column values), will have higher priorities.

Re: -f option in ps

Manel Ventura — Wed, 29 Aug 2001 14:23:23 GMT

Hi,

It isn't the CPU number. It is the CPU usage of that process. If you execute the command for all your processes, you will see that those that more consumes are also those that bigger value has in this column.

Re: -f option in ps

Praveen Bezawada — Wed, 29 Aug 2001 14:32:39 GMT

Hi
But as I had said , some processes which are using more CPU ( as seen from Glance ) have a value of 0 in CPU column.

Re: -f option in ps

Robin Wakefield — Wed, 29 Aug 2001 14:53:53 GMT

Hi Praveen,

The C column indicates the recent CPU usage value of a process. It is incremented by 1 each time that process is in control of the CPU when the timer interrupt occurs (every 10 milliseconds). The maximum value of recent CPU usage is 120.

Rgds, Robin

Re: -f option in ps

Sridhar Bhaskarla — Wed, 29 Aug 2001 17:15:36 GMT

The CPU column that appears in top is the processor number. The one you get with -f of ps
is the utilization for scheduling the process.

I am not sure if we can see the CPU number with the ps command

-Sri