Scheduling of Dynamically Generated Tasks to find Energy Efficient Clock-cycle in CPU

Abstract — In computing field, central processing unit (CPU) plays role of running the jobs. The aim of CPU is to handle the jobs with respect to the scheduling methods of operating system. Jobs are being generated and executed which also allow preemption during running. Different numbers of scheduling methods already exist and many are in progress. In usual scheduling, there are chances of jobs not done, so completion of given set of jobs on time basis has created. Some techniques are used to find total possible jobs done along with its utilization. Concept used is smallest period and fastest deadline and some variation to complete the set of jobs. One of the concepts of green computing is to minimum power usage in CPU with keeping the clock cycle fixed.Energy usage is critical part of any computer systems. This can be used in any devices which run through battery e.g. mobile, laptops, embedded system, servers, etc. with respect to this project which will be mostly used for servers, where jobs are never ending. At operating system position, scheduling has being executed at different clock cycle and calculated energy used during their run time. Hence comparisons are made and analysis is done to find the energy efficient clock cycle with respect to fixed set continuous amount of jobs. The analysis involves the approximately constant time which is important criteria. Conclusion is derived which says “What Megahertz (MHz) of the CPU will perform jobs and save energy efficiently?” Keywords—Scheduling,CPU utilization,clock-cycle,preemptions,deadline,jobs,rate,monotonic,frequency,energy