Program that implements the fifo and lru page replacement algorithms

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Sorry, your blog cannot share posts by email. FIFO " ;. LRU " ;. LFU " ;. EXIT " ;. Page fault Save Article. Like Article. We use. Python3 implementation of FIFO page. Function to find page faults using FIFO. To represent set of current pages. To store the pages in FIFO manner. Start from initial page. Check if the set can hold.

Insert it into set if not present. Push the current page into. If the set is full then need to perform FIFO. Check if current page is not. Pop the first page from the queue. Remove the indexes page. Increment page faults. This code is contributed by PranchalK. Contains pages[i]. Add pages[i] ;. Different page replacement algorithms suggest different ways to decide which page to replace.

The target for all algorithms is to reduce number of page faults. The idea is based on locality of reference, the least recently used page is not likely Let say the page reference string 7 0 1 2 0 3 0 4 2 3 0 3 2. Initially we have 4 page slots empty. Given memory capacity as number of pages it can hold and a string representing pages to be referred, write a function to find number of page faults.

Let capacity be the number of pages that memory can hold. Let set be the current set of pages in memory. Else a Find the page in the set that was least recently used.

We find it using index array. We basically need to replace the page with minimum index. Return page faults. Below is implementation of above steps. Skip to content. Change Language. Related Articles.

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