uninterrupted execution of Cpp Linux code

Hi is there a method on which I can make my code safe from other OS interrupts etc in Linux GNU? For example if I have the code below and I need to find the exact execution time without other things interrupting my code.

I have already looked into pthread_mutex_lock(&cs_mutex); but wasn’t able to stop other operations to run.

while(1){
//start some method to block other OS overheads
c_start=clock();
some_function();
c_end=clock();
//stop OS overhead block
//calculate time 
}

Answer

You can use clock_gettime:

timespec ts;
clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &ts);

It won’t prevent other processes interrupting your code but it will only time the execution of your process taking such interrupts into account.