topic Re: how to get cpu usage in c++ in Operating System - HP-UX

how to get cpu usage in c++

eric wang_2 — Mon, 31 May 2010 11:21:07 GMT

I would like to calcuate CPU usage in multiple CPU condition,
I would like to use API like pst_dynamic

cpu usage=1-CPU IDLE% or USER+NICE+SYS+BLOCK+SWAIT+INTR+SSYS

is any api can calcuate it
because i use summary all process usage /number of cpu is not ccurate

how to do program get cpu usage in c++

thanks

Re: how to get cpu usage in c++

James R. Ferguson — Mon, 31 May 2010 11:45:45 GMT

Hi:

I'd look at 'pstat_getprocessor()'. see the 'pstat(2)' manpages.

Regards!

...JRF...

Re: how to get cpu usage in c++

Dennis Handly — Mon, 31 May 2010 11:50:49 GMT

>how to do program get CPU usage in C++

The answer is the same as for C.
You'll need to scan the various pstat(2) headers in and what they include, to see which call gives the info you need.

Re: how to get cpu usage in c++

eric wang_2 — Wed, 02 Jun 2010 01:06:57 GMT

thanks for your reply,
I would like a workable cpu usage program example for hpux ,i search for a long time in web site ,but still have no idea how to do it

Re: how to get cpu usage in c++

Dennis Handly — Wed, 02 Jun 2010 09:59:45 GMT

JRF's pstat_getprocessor returns a pst_processor, see .

pst_dynamic also looks like it would give usage by CPU.

Re: how to get cpu usage in c++

James R. Ferguson — Wed, 02 Jun 2010 11:04:29 GMT

Hi (again):

> I would like a workable cpu usage program example for hpux ,i search for a long time in web site ,but still have no idea how to do it

The 'pstat(2)' manpages offer some examples, including one using both the 'pst_dynamic' and the 'pst_processor' structures.

You will need to look at the header files (on your system: 'ls -l /usr/include/sys/pstat*' ) and as documented in the manpages for the specific data you can glean.

Regards!

...JRF...