![]() ![]() The kitchen staff washes the plates and puts them in a rack in the order they were washed. Imagine that a restaurant kitchen has a limited number of plates and the plates are used to serve food to customers. Real Life Example to understand FIFO in OS:Ī real-life example of the FIFO page replacement algorithm can be found in a restaurant kitchen. The algorithm keeps track of all pages in memory in a queue and when a page fault occurs, the page at the front of the queue (the oldest page) is removed and the new page is added to the back of the queue. The term FIFO is an acronym for “First In, First Out”.The FIFO page replacement algorithm is a simple algorithm that replaces the oldest page in memory when a page fault occurs. Here we will discuss FIFO Algorithm in detail. Some algorithms may perform well for certain types of workloads, but poorly for others. The choice of the page replacement algorithm depends on the system’s needs and the characteristics of the workload. 2Q algorithm: This algorithm is a hybrid of LRU and LFU algorithms that tries to overcome the limitations of both algorithms by maintaining two queues.It uses future knowledge of the memory access pattern to determine which page to replace. Optimal: This algorithm replaces the page that will not be used for the longest period of time in the future.It keeps track of the number of times each page has been accessed and when a page fault occurs, the page with the lowest access count is replaced. ![]()
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