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28 * Authors: Daniel Carvalho
33 * Declaration of a Bimodal Interval Prediction replacement policy.
34 * Has a probability of when placing new entries, placing them as MRU.
36 * Although both LRU and LIP can be seen as specific cases of BIP
37 * where the bimodal throtle parameter are 1 and 0, respectively, we
38 * decide not to inherit from it, and do the other way around (inherit
39 * from LRU) for efficiency reasons.
41 * In the original paper they use btp = 1/32 ~= 3%.
44 #ifndef __MEM_CACHE_REPLACEMENT_POLICIES_BIP_RP_HH__
45 #define __MEM_CACHE_REPLACEMENT_POLICIES_BIP_RP_HH__
47 #include "mem/cache/replacement_policies/lru_rp.hh"
51 class BIPRP : public LRURP
55 * Bimodal throtle parameter. Value in the range [0,100] used to decide
56 * if a new entry is inserted at the MRU or LRU position.
61 /** Convenience typedef. */
62 typedef BIPRPParams Params;
65 * Construct and initiliaze this replacement policy.
67 BIPRP(const Params *p);
75 * Reset replacement data for an entry. Used when an entry is inserted.
76 * Uses the bimodal throtle parameter to decide whether the new entry
77 * should be inserted as MRU, or LRU.
79 * @param replacement_data Replacement data to be reset.
81 void reset(const std::shared_ptr<ReplacementData>& replacement_data) const
85 #endif // __MEM_CACHE_REPLACEMENT_POLICIES_BIP_RP_HH__