xref: /gem5/src/mem/cache/replacement_policies/ReplacementPolicies.py

# Copyright (c) 2018 Inria
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# Authors: Daniel Carvalho

from m5.params import *
from m5.proxy import *
from m5.SimObject import SimObject

class BaseReplacementPolicy(SimObject):
    type = 'BaseReplacementPolicy'
    abstract = True
    cxx_header = "mem/cache/replacement_policies/base.hh"

class FIFORP(BaseReplacementPolicy):
    type = 'FIFORP'
    cxx_class = 'FIFORP'
    cxx_header = "mem/cache/replacement_policies/fifo_rp.hh"

class SecondChanceRP(FIFORP):
    type = 'SecondChanceRP'
    cxx_class = 'SecondChanceRP'
    cxx_header = "mem/cache/replacement_policies/second_chance_rp.hh"

class LFURP(BaseReplacementPolicy):
    type = 'LFURP'
    cxx_class = 'LFURP'
    cxx_header = "mem/cache/replacement_policies/lfu_rp.hh"

class LRURP(BaseReplacementPolicy):
    type = 'LRURP'
    cxx_class = 'LRURP'
    cxx_header = "mem/cache/replacement_policies/lru_rp.hh"

class BIPRP(LRURP):
    type = 'BIPRP'
    cxx_class = 'BIPRP'
    cxx_header = "mem/cache/replacement_policies/bip_rp.hh"
    btp = Param.Percent(3, "Percentage of blocks to be inserted as MRU")

class LIPRP(BIPRP):
    btp = 0

class MRURP(BaseReplacementPolicy):
    type = 'MRURP'
    cxx_class = 'MRURP'
    cxx_header = "mem/cache/replacement_policies/mru_rp.hh"

class RandomRP(BaseReplacementPolicy):
    type = 'RandomRP'
    cxx_class = 'RandomRP'
    cxx_header = "mem/cache/replacement_policies/random_rp.hh"

class BRRIPRP(BaseReplacementPolicy):
    type = 'BRRIPRP'
    cxx_class = 'BRRIPRP'
    cxx_header = "mem/cache/replacement_policies/brrip_rp.hh"
    num_bits = Param.Int(2, "Number of bits per RRPV")
    hit_priority = Param.Bool(False,
        "Prioritize evicting blocks that havent had a hit recently")
    btp = Param.Percent(3,
        "Percentage of blocks to be inserted with long RRPV")

class RRIPRP(BRRIPRP):
    btp = 100

class NRURP(BRRIPRP):
    btp = 100
    num_bits = 1

class TreePLRURP(BaseReplacementPolicy):
    type = 'TreePLRURP'
    cxx_class = 'TreePLRURP'
    cxx_header = "mem/cache/replacement_policies/tree_plru_rp.hh"
    num_leaves = Param.Int(Parent.assoc, "Number of leaves in each tree")