gem5/tests/configs/o3-timing-mp.py
Mrinmoy Ghosh 6fc0094337 Cache: add a response latency to the caches
In the current caches the hit latency is paid twice on a miss. This patch lets
a configurable response latency be set of the cache for the backward path.
2012-09-25 11:49:41 -05:00

94 lines
3.1 KiB
Python

# Copyright (c) 2006-2007 The Regents of The University of Michigan
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# Authors: Ron Dreslinski
import m5
from m5.objects import *
m5.util.addToPath('../configs/common')
# --------------------
# Base L1 Cache
# ====================
class L1(BaseCache):
hit_latency = '1ns'
response_latency = '1ns'
block_size = 64
mshrs = 4
tgts_per_mshr = 20
is_top_level = True
# ----------------------
# Base L2 Cache
# ----------------------
class L2(BaseCache):
block_size = 64
hit_latency = '10ns'
response_latency = '10ns'
mshrs = 92
tgts_per_mshr = 16
write_buffers = 8
nb_cores = 4
cpus = [ DerivO3CPU(cpu_id=i) for i in xrange(nb_cores) ]
# system simulated
system = System(cpu = cpus, physmem = SimpleMemory(), membus = CoherentBus())
# l2cache & bus
system.toL2Bus = CoherentBus()
system.l2c = L2(size='4MB', assoc=8)
system.l2c.cpu_side = system.toL2Bus.master
# connect l2c to membus
system.l2c.mem_side = system.membus.slave
# add L1 caches
for cpu in cpus:
cpu.addPrivateSplitL1Caches(L1(size = '32kB', assoc = 1),
L1(size = '32kB', assoc = 4))
# create the interrupt controller
cpu.createInterruptController()
# connect cpu level-1 caches to shared level-2 cache
cpu.connectAllPorts(system.toL2Bus, system.membus)
cpu.clock = '2GHz'
# connect memory to membus
system.physmem.port = system.membus.master
# connect system port to membus
system.system_port = system.membus.slave
# -----------------------
# run simulation
# -----------------------
root = Root( full_system = False, system = system )
root.system.mem_mode = 'timing'
#root.trace.flags="Bus Cache"
#root.trace.flags = "BusAddrRanges"