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The simplest page-replacement algorithm is a FIFO algorithm. The first-in, first-out (FIFO) page replacement algorithm is a low-overhead algorithm that requires little bookkeeping on the part of the operating system. The idea is obvious from the name – the operating system keeps track of all the pages in memory in a queue, with the most ...
This phenomenon is commonly experienced when using the first-in first-out page replacement algorithm. In FIFO, the page fault may or may not increase as the page frames increase, but in optimal and stack-based algorithms like LRU, as the page frames increase, the page fault decreases. László Bélády demonstrated this in 1969. [1]
While all page replacement algorithms rely on existence of reference locality to function, a major difference among different replacement algorithms is on how this locality is quantified. LIRS uses reuse distance of a page, or the number of distinct pages accessed between two consecutive references of the page, to quantify locality.
LIRS is a page replacement algorithm with better performance than LRU and other, newer replacement algorithms. Reuse distance is a metric for dynamically ranking accessed pages to make a replacement decision. [30] LIRS addresses the limits of LRU by using recency to evaluate inter-reference recency (IRR) to make a replacement decision.
When a page is selected for replacement, the modify bit is examined. If the bit is set, the page has been modified since it was read in from the disk. In this case, the page must be written to the disk. If the dirty bit is not set, however, the page has not been modified since it was read into memory. Therefore, if the copy of the page on the ...
Adaptive Replacement Cache (ARC) is a page replacement algorithm with better performance [1] than LRU (least recently used). This is accomplished by keeping track of both frequently used and recently used pages plus a recent eviction history for both. The algorithm was developed [2] at the IBM Almaden Research Center.
OPT, the theoretically optimal page replacement algorithm, a page replacement algorithm for swapping out pages from memory; Other uses
There are a large number of call-side actions, such as deactivation and truncation, and some ALM actions, such as the discovery of zeros by the page-writing primitive (write_page in page_fault) that cause page-frames to become explicitly free; these actions all aid the replacement algorithm and simplify its task by putting these page frames at ...