A Processor Scheduler : the CpuManager
نویسندگان
چکیده
In an multiprocessor environment, with applications running concurrently, the Operating System is responsible for optimizing the system utilization. The scheduler distributes processors among applications according to a scheduling policy. The system utilization depends on several factors such as the number of processors assigned to an application, the placement of these processors or the amount of time that the processors are assigned to an application. Since the processor scheduler is normally integrated with the Operating System, users can not control the scheduling of their applications. In this work we present the structure of a user-level processor a scheduler implemented on top of IRIX6.5, to which, we will refer as CpuManager. The CpuManager will provide us a total control of the scheduling of the applications. This control will include the scheduling policies and the mechanism to carry out with the scheduling policy decisions. The aim of the CpuManager is to provide us a tool to analyze the effect of these different scheduling issues in the performance of both the individual applications and the global system utilization.
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