increasing the load on the CPU

aloktiagi · 07-30-2009, 11:26 PM

i need to write a code to increase the load on the cpu to some x percentage

the value x should be given by the user

how can i go about achieving this

karamarisan · 07-30-2009, 11:57 PM

What's this for? Not homework, I trust?

chrism01 · 07-31-2009, 12:42 AM

The OS is a dynamic env, it'll only be at a given load for a fraction of a second.
If you have the system only running the bare minimum OS, plus your program, you should be able to get your prog to fork new processes and check the load until you get close to the number you want.
It's trial and error.
For cpu load, use a prog that just does basic calcns, that'll make it cpu bound.

aloktiagi · 07-31-2009, 12:56 AM

thanks for the reply.

Will doing calculations cause the kernel to lower the priority of my program thus not getting the necessary results?

also can it put fork() inside a loop for some definite iterations and see the cpu usage increase. Won't the kernel terminate this fork() loop?