A key to the performance of the VSWS resident set management policy is the value of Q. Experience has shown that with a fixed value of Q for a process, there are considerable differences in page fault frequencies at various stages of execution. Furthermore, if a single value of Q is used for different processes, dramatically different frequencies of page faults occur. These differences strongly indicate that a mechanism that would dynamically adjust the value of Q during the lifetime of a process would improve the behavior of the algorithm. Suggest a simple mechanism for this purpose.
Answer to relevant QuestionsAssume that a task is divided into four equal-sized segments and that the system builds an eight-entry page descriptor table for each segment. Thus, the system has a combination of segmentation and paging. Assume also that ...Briefly define shortest-remaining-time scheduling. In a non-preemptive uni-processor system, the ready queue contains three jobs at time t immediately after the completion of a job. These jobs arrived at times t1, t2, and t3 with estimated execution times of r1, r2, and r3, ...List and briefly define five different categories of synchronization granularity. Consider a set of five aperiodic tasks with the execution profiles of Table. Develop scheduling diagrams similar to those of Figure for this set of tasks.
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