What is meant by "%WCPU %CPU" column for top command in HP-UX

[Md. Minhaz Khan]

Dear All,

What is meant by "%WCPU %CPU" column for top command in HP-UX?

Can any one tell me in an easy way?

Thanks
Minhaz

[Horia Chirculescu]

From man top:

%WCPU Weighted CPU (central processing unit) percentage.

Read

http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=57634&admit=109447626+1271160793100+28353475

Jean-Louis Phelix's post.

At the end there are also the formulas

%WCPU ---> (100.0 * pctcpu / (1.0 - exp(pp->pst_time * logcpu))),
%CPU ---> (100.0 * pctcpu));

Horia.

[James R. Ferguson]

Hi:

The '%wcpu' is a *weighted* CPU percentage whereas the '%cpu' is the CPU percentage during the last sample interval.

The weighted value gives a percentage based on more than one sample interval over time and thus should better reflect a process's average resource utilization.

Regards!

...JRF...

[Horia Chirculescu]

Here are the maths about "weighted percentage" (with some easy to understand samples)

http://mathforum.org/library/drmath/view/52803.html

Best regards from Romania,
Horia.

[Horia Chirculescu]

: At the university (back in 1995) I had knew someone from India who was brilliant at math.

Bets regards from Romania,
Horia.

[Md. Minhaz Khan]

Thanks a lot everybody.

Minhaz