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configs: caches.py: Allow simulation of cache replacement policies

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The current cache configuration script does not allow specifying
cache replacement policies for testing. Add parser options to
support this.
This commit is contained in:
Sanchayan Maity 2017-01-24 10:28:38 +05:30
parent 2e1e1aedc7
commit 6e058b9eb3
1 changed files with 25 additions and 2 deletions
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25
configs/learning_gem5/part1/caches.py
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@ -88,16 +88,39 @@ class L1DCache(L1Cache):
# Set the default size # Set the default size
size = '64kB' size = '64kB'
assoc = 8
SimpleOpts.add_option('--l1d_size', SimpleOpts.add_option('--l1d_size',
help="L1 data cache size. Default: %s" % size) help="L1 data cache size. Default: %s" % size)
SimpleOpts.add_option('--l1d_assoc',
help="L1 data cache associativity. Default: %s" % assoc)
SimpleOpts.add_option('--replacement_policy',
help="L1 cache replacement policy. [NMRU,LRU,Random]")
def __init__(self, opts=None): def __init__(self, opts=None):
super(L1DCache, self).__init__(opts) super(L1DCache, self).__init__(opts)
if not opts or not opts.l1d_size: if not opts:
return return
if opts.l1d_size:
self.size = opts.l1d_size self.size = opts.l1d_size
if opts.l1d_assoc:
self.size = opts.l1d_assoc
if opts.replacement_policy == "NMRU":
from m5.objects import NMRU
self.tags = NMRU()
elif opts.replacement_policy == "Random":
from m5.objects import RandomRepl
self.tags = RandomRepl()
elif opts.replacement_policy == "LRU":
from m5.objects import LRU
self.tags = LRU()
elif opts.replacement_policy:
fatal("Unsupported replacement policy: %s" %
opts.replacement_policy)
def connectCPU(self, cpu): def connectCPU(self, cpu):
"""Connect this cache's port to a CPU dcache port""" """Connect this cache's port to a CPU dcache port"""
self.cpu_side = cpu.dcache_port self.cpu_side = cpu.dcache_port