gem5/tests/configs/memtest-ruby.py
Andreas Hansson 072a91ee51 Configs: Set the memtest clock to a reasonable value
This patch changes the memtest clock from 1THz (the default) to 2GHz,
similar to the CPUs in the other regressions. This is useful as the
caches will adopt the same clock as the CPU. The bus clock rate is
scaled accordingly, and the L1-L2 bus is kept at the CPU clock while
the memory bus is at half that frequency.

A separate patch updates the affected stats.
2012-10-15 08:09:57 -04:00

120 lines
4 KiB
Python

# Copyright (c) 2006-2007 The Regents of The University of Michigan
# Copyright (c) 2010 Advanced Micro Devices, Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
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# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# Authors: Ron Dreslinski
import m5
from m5.objects import *
from m5.defines import buildEnv
from m5.util import addToPath
import os, optparse, sys
# Get paths we might need
config_path = os.path.dirname(os.path.abspath(__file__))
config_root = os.path.dirname(config_path)
m5_root = os.path.dirname(config_root)
addToPath(config_root+'/configs/common')
addToPath(config_root+'/configs/ruby')
addToPath(config_root+'/configs/topologies')
import Ruby
import Options
parser = optparse.OptionParser()
Options.addCommonOptions(parser)
# Add the ruby specific and protocol specific options
Ruby.define_options(parser)
(options, args) = parser.parse_args()
#
# Set the default cache size and associativity to be very small to encourage
# races between requests and writebacks.
#
options.l1d_size="256B"
options.l1i_size="256B"
options.l2_size="512B"
options.l3_size="1kB"
options.l1d_assoc=2
options.l1i_assoc=2
options.l2_assoc=2
options.l3_assoc=2
#MAX CORES IS 8 with the fals sharing method
nb_cores = 8
# ruby does not support atomic, functional, or uncacheable accesses
cpus = [ MemTest(clock = '2GHz', atomic=False, percent_functional=50,
percent_uncacheable=0, suppress_func_warnings=True) \
for i in xrange(nb_cores) ]
# overwrite options.num_cpus with the nb_cores value
options.num_cpus = nb_cores
# system simulated
system = System(cpu = cpus,
funcmem = SimpleMemory(in_addr_map = False),
funcbus = NoncoherentBus(),
physmem = SimpleMemory())
Ruby.create_system(options, system)
assert(len(cpus) == len(system.ruby._cpu_ruby_ports))
for (i, ruby_port) in enumerate(system.ruby._cpu_ruby_ports):
#
# Tie the cpu test and functional ports to the ruby cpu ports and
# physmem, respectively
#
cpus[i].test = ruby_port.slave
cpus[i].functional = system.funcbus.slave
#
# Since the memtester is incredibly bursty, increase the deadlock
# threshold to 1 million cycles
#
ruby_port.deadlock_threshold = 1000000
#
# Ruby doesn't need the backing image of memory when running with
# the tester.
#
ruby_port.access_phys_mem = False
# connect reference memory to funcbus
system.funcmem.port = system.funcbus.master
# -----------------------
# run simulation
# -----------------------
root = Root(full_system = False, system = system)
root.system.mem_mode = 'timing'
# Not much point in this being higher than the L1 latency
m5.ticks.setGlobalFrequency('1ns')