gem5/tests/configs/memtest.py

# Copyright (c) 2006-2007 The Regents of The University of Michigan
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# Authors: Ron Dreslinski

import m5
from m5.objects import *

# --------------------
# Base L1 Cache
# ====================

class L1(BaseCache):
    hit_latency = 2
    response_latency = 2
    block_size = 64
    mshrs = 12
    tgts_per_mshr = 8
    is_top_level = True

# ----------------------
# Base L2 Cache
# ----------------------

class L2(BaseCache):
    block_size = 64
    hit_latency = 20
    response_latency = 20
    mshrs = 92
    tgts_per_mshr = 16
    write_buffers = 8

#MAX CORES IS 8 with the fals sharing method
nb_cores = 8
cpus = [ MemTest(clock = '2GHz') for i in xrange(nb_cores) ]

# system simulated
system = System(cpu = cpus, funcmem = SimpleMemory(in_addr_map = False),
                funcbus = NoncoherentBus(),
                physmem = SimpleMemory(),
                membus = CoherentBus(clock="1GHz", width=16))

# l2cache & bus
system.toL2Bus = CoherentBus(clock="2GHz", width=16)
system.l2c = L2(clock = '2GHz', size='64kB', 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.l1c = L1(size = '32kB', assoc = 4)
    cpu.l1c.cpu_side = cpu.test
    cpu.l1c.mem_side = system.toL2Bus.slave
    system.funcbus.slave = cpu.functional

system.system_port = system.membus.slave

# connect reference memory to funcbus
system.funcmem.port = system.funcbus.master

# connect memory to membus
system.physmem.port = system.membus.master


# -----------------------
# run simulation
# -----------------------

root = Root( full_system = False, system = system )
root.system.mem_mode = 'timing'
#root.trace.flags="Cache CachePort MemoryAccess"
#root.trace.cycle=1