How to get cpu % without calling system api

qquest · 07-23-2010, 02:02 AM

Hi Folks,
I need an requirement like get the cpu% of particular process without calling system call.
I have to handle load in my application. for every new request i have to check the cpu usage of application.
If we use system call for every request, that will take more cpu usage.

Is any way to get the cpu% other than system call?

am very new to linux. please help me to get rid of.

Thanks in advance

-vijay

syg00 · 07-23-2010, 02:38 AM

Define API.
How do you expect to get CPU usage without entering kernelspace to get the numbers ?.

All the data you need is exposed via /proc - you will need to do the (percentage) math yourself.

qquest · 07-23-2010, 03:44 AM

Thanks for your immediate reply...

/proc also collect these info from kernel?

kernel will not expose these kind of info to user?

I meant kernel not maintaining any structure for these info to user to get these info directly rather than getting it to kernel

-vijay

crts · 07-23-2010, 06:32 AM

Hi,

since this is not a Linux From Scratch related question you should ask a moderator to move this thread to a better suited forum, e. g. programming.

Aquarius_Girl · 08-14-2010, 10:17 AM

Vijay,

Use the "Report" button of your first post to report the thread to moderators. Posting the report message on their profiles is useless !!