A Pragmatic Delineation on Cache Bypass Algorithm in Last-Level Cache (LLC)

Last-level cache is a high level cache memory shared by all core in a multi-core chip to improve the overall efficiency of modern processors. Most of the cache management policies are based on the residency of the cache block, access time, frequency tour, recency and reuse distance to lower down the total miss count. However, in a contemporary multi level cache processor a bypass replacement reduces both miss penalty and processor stall cycles to accelerate the overall performance. This paper has analyzed different bypass replacement approaches. It also gives motivation behind different bypass replacement techniques, used in the last-level cache with inclusive and non-inclusive behavior with improved placement and promotion.