how to get cpu usage in c++

[eric wang_2]

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

[James R. Ferguson]

Hi:

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

Regards!

...JRF...

[Dennis Handly]

>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.

[eric wang_2]

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

[Dennis Handly]

JRF's pstat_getprocessor returns a pst_processor, see .

pst_dynamic also looks like it would give usage by CPU.

[James R. Ferguson]

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...