gem5/configs/example/etrace_replay.py

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# Authors: Radhika Jagtap

# Basic elastic traces replay script that configures a Trace CPU

import optparse

from m5.util import addToPath, fatal

addToPath('../common')

import Options
import Simulation
import CacheConfig
import MemConfig
from Caches import *

parser = optparse.OptionParser()
Options.addCommonOptions(parser)

if '--ruby' in sys.argv:
    print "This script does not support Ruby configuration, mainly"\
    " because Trace CPU has been tested only with classic memory system"
    sys.exit(1)

(options, args) = parser.parse_args()

if args:
    print "Error: script doesn't take any positional arguments"
    sys.exit(1)

numThreads = 1

if options.cpu_type != "trace":
    fatal("This is a script for elastic trace replay simulation, use "\
            "--cpu-type=trace\n");

if options.num_cpus > 1:
    fatal("This script does not support multi-processor trace replay.\n")

# In this case FutureClass will be None as there is not fast forwarding or
# switching
(CPUClass, test_mem_mode, FutureClass) = Simulation.setCPUClass(options)
CPUClass.numThreads = numThreads

system = System(cpu = CPUClass(cpu_id=0),
                mem_mode = test_mem_mode,
                mem_ranges = [AddrRange(options.mem_size)],
                cache_line_size = options.cacheline_size)

# Create a top-level voltage domain
system.voltage_domain = VoltageDomain(voltage = options.sys_voltage)

# Create a source clock for the system. This is used as the clock period for
# xbar and memory
system.clk_domain = SrcClockDomain(clock =  options.sys_clock,
                                   voltage_domain = system.voltage_domain)

# Create a CPU voltage domain
system.cpu_voltage_domain = VoltageDomain()

# Create a separate clock domain for the CPUs. In case of Trace CPUs this clock
# is actually used only by the caches connected to the CPU.
system.cpu_clk_domain = SrcClockDomain(clock = options.cpu_clock,
                                       voltage_domain =
                                       system.cpu_voltage_domain)

# All cpus belong to a common cpu_clk_domain, therefore running at a common
# frequency.
for cpu in system.cpu:
    cpu.clk_domain = system.cpu_clk_domain

# Assign input trace files to the Trace CPU
system.cpu.instTraceFile=options.inst_trace_file
system.cpu.dataTraceFile=options.data_trace_file

# Configure the classic memory system options
MemClass = Simulation.setMemClass(options)
system.membus = SystemXBar()
system.system_port = system.membus.slave
CacheConfig.config_cache(options, system)
MemConfig.config_mem(options, system)

root = Root(full_system = False, system = system)
Simulation.run(options, root, system, FutureClass)