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Hi,

It has been asked a few times before on this forum, but none of the answers gave me a statisfying solution.

I want to make a function that returns the cpu usage in %. I can use getloadavg() which returns the load averages. But I dont want that because the loadavg can be bigger than 2 or 3 even with a single cpu.

And this:

Quote:

#my_array=($(top -n 1))
#echo ${my_array[27]}

Gives me a different output on each pc.

What is a reliable way to get the cpu usage in linux using C++ (or just the command-line)?

Hello

You might use conky http://conky.sourceforge.net/ to compare the values you get.

Bye

Koen Plessers

Compare to what?

I am only able to get the load average, and when I try to extract the % with top every computer retuns something different (system, user, waiting, etc).

Have a look at /proc/stat to get CPU usage (user, nice, system and idle), loadavg is a different metric.

Hi.

Quote:

P Percentage of the CPU that this job got. This is just
user + system times divided by the total running time. It
also prints a percentage sign.
-- excerpt from man time

cheers, makyo