Question

the number of frames needed by the process p1 is 20 and that of the process p2 is 138. There are about 80 frames that are allocated to the fixed allocation of the frame.How many frames are allocated to each of the process in the proportional allocation

Answer 1

Answer:

An important aspect of operating systems, virtual memory is implemented using demand paging. Demand paging necessitates the development of a page-replacement algorithm and a frame allocation algorithm. Frame allocation algorithms are used if you have multiple processes; it helps decide how many frames to allocate to each process.

There are various constraints to the strategies for the allocation of frames:

You cannot allocate more than the total number of available frames.

At least a minimum number of frames should be allocated to each process. This constraint is supported by two reasons. The first reason is, as less number of frames are allocated, there is an increase in the page fault ratio, decreasing the performance of the execution of the process. Secondly, there should be enough frames to hold all the different pages that any single instruction can reference.