ReplacementPolicies.py revision 12685 
1# Copyright (c) 2018 Inria
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27# Authors: Daniel Carvalho
28
29from m5.params import *
30from m5.proxy import *
31from m5.SimObject import SimObject
32
33class BaseReplacementPolicy(SimObject):
34    type = 'BaseReplacementPolicy'
35    abstract = True
36    cxx_header = "mem/cache/replacement_policies/base.hh"
37
38class FIFORP(BaseReplacementPolicy):
39    type = 'FIFORP'
40    cxx_class = 'FIFORP'
41    cxx_header = "mem/cache/replacement_policies/fifo_rp.hh"
42
43class SecondChanceRP(FIFORP):
44    type = 'SecondChanceRP'
45    cxx_class = 'SecondChanceRP'
46    cxx_header = "mem/cache/replacement_policies/second_chance_rp.hh"
47
48class LFURP(BaseReplacementPolicy):
49    type = 'LFURP'
50    cxx_class = 'LFURP'
51    cxx_header = "mem/cache/replacement_policies/lfu_rp.hh"
52
53class LRURP(BaseReplacementPolicy):
54    type = 'LRURP'
55    cxx_class = 'LRURP'
56    cxx_header = "mem/cache/replacement_policies/lru_rp.hh"
57
58class BIPRP(LRURP):
59    type = 'BIPRP'
60    cxx_class = 'BIPRP'
61    cxx_header = "mem/cache/replacement_policies/bip_rp.hh"
62    btp = Param.Percent(3, "Percentage of blocks to be inserted as MRU")
63
64class LIPRP(BIPRP):
65    btp = 0
66
67class MRURP(BaseReplacementPolicy):
68    type = 'MRURP'
69    cxx_class = 'MRURP'
70    cxx_header = "mem/cache/replacement_policies/mru_rp.hh"
71
72class RandomRP(BaseReplacementPolicy):
73    type = 'RandomRP'
74    cxx_class = 'RandomRP'
75    cxx_header = "mem/cache/replacement_policies/random_rp.hh"
76
77class BRRIPRP(BaseReplacementPolicy):
78    type = 'BRRIPRP'
79    cxx_class = 'BRRIPRP'
80    cxx_header = "mem/cache/replacement_policies/brrip_rp.hh"
81    max_RRPV = Param.Int(3, "Maximum RRPV possible")
82    hit_priority = Param.Bool(False,
83        "Prioritize evicting blocks that havent had a hit recently")
84    btp = Param.Percent(3,
85        "Percentage of blocks to be inserted with long RRPV")
86
87class RRIPRP(BRRIPRP):
88    btp = 0
89
90class NRURP(BRRIPRP):
91    btp = 0
92    max_RRPV = 1
93