Abstract: “In our days we want to run multiple jobs in the same time in the system. Most of computers systems have multiple processors or multiple execution cores. This makes the concurrency higher. I choose the theme about threads because I wanted to know more about the basic unit of software that operating systems deal with “threads”. In this article I am going to describe these threads and I am going to do an experiment to explain better how they affect the load of CPU and the performance too.”

Keywords: multi processors, threads, CPU performance