Effects of multiprogramming on resource utilization

With the utilize of multiprogramming, batch processing is able to be quite efficient .Just as multiprogramming permits the processor to handle multiple batch jobs at a time, multiprogramming is able to be used to handle multiple interactive jobs .Both batch timesharing and multiprogramming use multiprogramming.

While the processor is dealing with a number of programs, the sequence with which programs are implemented will depend on their relative priority and on whether they are waiting for I/O. When a program former interrupted and control transfers headed for an interrupt handler, formerly the interrupt routine has completed, control may perhaps not immediately be returned to the user program that was in execution at the time. In its place, control may possibly pass to some other pending program with a higher priority. Ultimately, while it has the highest priority, the user program so as to interrupted will be resumed

In the usual multiprocessor which is dealing with coarse-grained or independent synchronization granularity, it is clear that every individual processor must be able to switch among a number of processes to achieve high use and thus better performance. Although when we deal with medium grained applications running on a multiprocessor with several processors the situation is less clear. When several processors are available, it is no longer dominant that every single processor is busy as much as possible. Relatively, we are concerned to offer the best performance on average for the applications. The application that consists of a number of threads may possibly run poorly unless all its threads are available to run concurrently.