How to get CPU usage in C?

Question

I want to get the total shared CPU usage for the application in C, the shared CPU usage, as we get in the TaskManager ... I want to know ... for windows and linux :: current The shared CPU usage by all processes ..... as we see in the task manager.

Answer 1

It depends on the platform:

• On Windows, you can use the function GetProcessTimes().
• On Linux, you can just use clock().

They can be used to measure the amount of processor time taken between two time intervals.

EDIT:

( ), # , , :

% CPU usage = (CPU time) / (# of cores) / (wall time)

# :

• Windows: GetSystemInfo()
• Linux: sysconf(_SC_NPROCESSORS_ONLN)

Answer 2

POSIX getrusage (2) ru_utime. RUSAGE_SELF RUSAGE_CHILDEN (2) ed. Linux RUSAGE_THREAD . ru_stime, , ru_utime ( ).

Answer 3

.

You can use the clock function by returning clock_t(some integer type, for example, long). On Linux systems, it measures the processor time in microseconds.

Answer 4

This is what I was looking for. By manipulating them on my way, I launch it successfully.

Get overall CPU usage