gem5/tests/configs/memtest.py

# Copyright (c) 2006 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):
    latency = 1
    block_size = 64
    mshrs = 12
    tgts_per_mshr = 8
    protocol = CoherenceProtocol(protocol='moesi')

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

class L2(BaseCache):
    block_size = 64
    latency = 10
    mshrs = 92
    tgts_per_mshr = 16
    write_buffers = 8

#MAX CORES IS 8 with the fals sharing method
nb_cores = 8
cpus = [ MemTest(atomic=False, max_loads=1e12, percent_uncacheable=10, progress_interval=1000) for i in xrange(nb_cores) ]

# system simulated
system = System(cpu = cpus, funcmem = PhysicalMemory(),
                physmem = PhysicalMemory(), membus = Bus(clock="500GHz", width=16))

# l2cache & bus
system.toL2Bus = Bus(clock="500GHz", width=16)
system.l2c = L2(size='64kB', assoc=8)
system.l2c.cpu_side = system.toL2Bus.port

# connect l2c to membus
system.l2c.mem_side = system.membus.port

which_port = 0
# 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.port
    if  which_port == 0:
         system.funcmem.port = cpu.functional
         which_port = 1
    else:
         system.funcmem.functional = cpu.functional


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


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

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