How to control CPU utilization via C/C++/Python Program?

Question

Below instruction will start CPU stress with maximum of 100%,

while(1);

Below instructions will start CPU stress with near to 0%.

while(1)
     sleep(1);

Is there any way to control this? I mean what if i want to start CPU stress of >100% and what if want to start CPU stress with particular number?

Can any one help in programming that? I am looking for C/C++/Python solution on Linux...

Comments

You can write a simple shall script which can monitor a process and whenever it goes beyond say 99% just kill the process.

Let me know your thoughts

---

No Sir, My question is different.
In simple words....I want to create one function which will take 1 argument i.e. how much CPU stress we want to start using our application.
Suppose, if we give call a function with argument as 75 then our application should stress 75% CPU.
If we give call a function with argument as 140 then our application should stress 140% CPU.

---

Its difficult to write a generalized function as CPU cycle to different machine is different. For example on one machine sleep of 10 nanosection followed by 1000 loops may give 50% usage but the same will result in different usage on different machine.

I am not sure if there is a library function to achieve that but its less likely.