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- W2018284192 abstract "Last-level cache performance has been proved to be crucial to the system performance. Essentially, any cache management policy improves performance by retaining blocks that it believes to have higher values preferentially. Most cache management policies use the access time or reuse distance of a block as its value to minimize total miss count. However, cache miss penalty is variable in modern systems due to i) variable memory access latency and ii) the disparity in latency toleration ability across different misses. Some recently proposed policies thus take into account the miss penalty as the block value. However, only considering miss penalty is not enough. In fact, the value of a block includes not only the penalty on its misses, but also the reduction of processor stall cycles on its hits, i.e., hit benefit. Therefore, we propose a method to compute both miss penalty and hit benefit. Then, the value of a block is calculated by accumulating all the miss penalty and hit benefits of its requests. Using our notion of block value, we propose Value based Insertion Policy (VIP) which aims to reserve more blocks with higher values in the cache. VIP keeps track of a small number of incoming and victim block pairs to learn the relationship between the value of the incoming block and that of the victim. On a miss, if the value of the incoming block is learned to be lower than that of the victim block in the past, VIP will predict that the incoming block is valueless and insert it with a high eviction priority. The evaluation shows that VIP can improve cache performance significantly in both single-core and multi-core environment while requiring a low storage overhead." @default.
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- W2018284192 date "2014-06-10" @default.
- W2018284192 modified "2023-09-23" @default.
- W2018284192 title "Block value based insertion policy for high performance last-level caches" @default.
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- W2018284192 doi "https://doi.org/10.1145/2597652.2597653" @default.
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