Пример #1
0
def main():
    parser = argparse.ArgumentParser(epilog=__doc__)

    parser.add_argument("commands_to_run", metavar="command(s)", nargs='*',
                        help="Command(s) to run")
    parser.add_argument("--cpu", type=str, choices=cpu_types.keys(),
                        default="atomic",
                        help="CPU model to use")
    parser.add_argument("--cpu-freq", type=str, default="4GHz")
    parser.add_argument("--num-cores", type=int, default=1,
                        help="Number of CPU cores")
    parser.add_argument("--mem-type", default="DDR3_1600_8x8",
                        choices=MemConfig.mem_names(),
                        help = "type of memory to use")
    parser.add_argument("--mem-channels", type=int, default=2,
                        help = "number of memory channels")
    parser.add_argument("--mem-ranks", type=int, default=None,
                        help = "number of memory ranks per channel")
    parser.add_argument("--mem-size", action="store", type=str,
                        default="2GB",
                        help="Specify the physical memory size")

    args = parser.parse_args()

    # Create a single root node for gem5's object hierarchy. There can
    # only exist one root node in the simulator at any given
    # time. Tell gem5 that we want to use syscall emulation mode
    # instead of full system mode.
    root = Root(full_system=False)

    # Populate the root node with a system. A system corresponds to a
    # single node with shared memory.
    root.system = create(args)

    # Instantiate the C++ object hierarchy. After this point,
    # SimObjects can't be instantiated anymore.
    m5.instantiate()

    # Start the simulator. This gives control to the C++ world and
    # starts the simulator. The returned event tells the simulation
    # script why the simulator exited.
    event = m5.simulate()

    # Print the reason for the simulation exit. Some exit codes are
    # requests for service (e.g., checkpoints) from the simulation
    # script. We'll just ignore them here and exit.
    print(event.getCause(), " @ ", m5.curTick())
    sys.exit(event.getCode())
Пример #2
0
def main():
    parser = argparse.ArgumentParser(epilog=__doc__)

    parser.add_argument("--dtb", type=str, default=None,
                        help="DTB file to load")
    parser.add_argument("--kernel", type=str, default=default_kernel,
                        help="Linux kernel")
    parser.add_argument("--disk-image", type=str,
                        default=default_disk,
                        help="Disk to instantiate")
    parser.add_argument("--script", type=str, default="",
                        help = "Linux bootscript")
    parser.add_argument("--cpu", type=str, choices=cpu_types.keys(),
                        default="atomic",
                        help="CPU model to use")
    parser.add_argument("--cpu-freq", type=str, default="4GHz")
    parser.add_argument("--num-cores", type=int, default=1,
                        help="Number of CPU cores")
    parser.add_argument("--mem-type", default="DDR3_1600_8x8",
                        choices=MemConfig.mem_names(),
                        help = "type of memory to use")
    parser.add_argument("--mem-channels", type=int, default=1,
                        help = "number of memory channels")
    parser.add_argument("--mem-ranks", type=int, default=None,
                        help = "number of memory ranks per channel")
    parser.add_argument("--mem-size", action="store", type=str,
                        default="2GB",
                        help="Specify the physical memory size")
    parser.add_argument("--checkpoint", action="store_true")
    parser.add_argument("--restore", type=str, default=None)


    args = parser.parse_args()

    root = Root(full_system=True)
    root.system = create(args)

    if args.restore is not None:
        m5.instantiate(args.restore)
    else:
        m5.instantiate()

    run(args)
Пример #3
0
        try:
            import google.protobuf
        except:
            print("Please install the Python protobuf module")
            exit(-1)

        import packet_pb2
    else:
        print("Failed to import packet proto definitions")
        exit(-1)

parser = optparse.OptionParser()

parser.add_option("--mem-type", type="choice", default="DDR3_1600_8x8",
                  choices=MemConfig.mem_names(),
                  help = "type of memory to use")
parser.add_option("--mem-size", action="store", type="string",
                  default="16MB",
                  help="Specify the memory size")
parser.add_option("--reuse-trace", action="store_true",
                  help="Prevent generation of traces and reuse existing")

(options, args) = parser.parse_args()

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

# start by creating the system itself, using a multi-layer 2.0 GHz
# crossbar, delivering 64 bytes / 3 cycles (one header cycle) which
Пример #4
0
def addNoISAOptions(parser):
    parser.add_option("-n", "--num-cpus", type="int", default=1)
    parser.add_option("--sys-voltage", action="store", type="string",
                      default='1.0V',
                      help = """Top-level voltage for blocks running at system
                      power supply""")
    parser.add_option("--sys-clock", action="store", type="string",
                      default='1GHz',
                      help = """Top-level clock for blocks running at system
                      speed""")

    # Memory Options
    parser.add_option("--list-mem-types",
                      action="callback", callback=_listMemTypes,
                      help="List available memory types")
    parser.add_option("--mem-type", type="choice", default="DDR3_1600_8x8",
                      choices=MemConfig.mem_names(),
                      help = "type of memory to use")
    parser.add_option("--mem-channels", type="int", default=1,
                      help = "number of memory channels")
    parser.add_option("--mem-ranks", type="int", default=None,
                      help = "number of memory ranks per channel")
    parser.add_option("--mem-size", action="store", type="string",
                      default="512MB",
                      help="Specify the physical memory size (single memory)")


    parser.add_option("--memchecker", action="store_true")

    # Cache Options
    parser.add_option("--external-memory-system", type="string",
                      help="use external ports of this port_type for caches")
    parser.add_option("--tlm-memory", type="string",
                      help="use external port for SystemC TLM cosimulation")
    parser.add_option("--caches", action="store_true")
    parser.add_option("--l2cache", action="store_true")
    parser.add_option("--num-dirs", type="int", default=1)
    parser.add_option("--num-l2caches", type="int", default=1)
    parser.add_option("--num-l3caches", type="int", default=1)
    parser.add_option("--l1d_size", type="string", default="64kB")
    parser.add_option("--l1i_size", type="string", default="32kB")
    parser.add_option("--l2_size", type="string", default="2MB")
    parser.add_option("--l3_size", type="string", default="16MB")
    parser.add_option("--l1d_assoc", type="int", default=2)
    parser.add_option("--l1i_assoc", type="int", default=2)
    parser.add_option("--l2_assoc", type="int", default=8)
    parser.add_option("--l3_assoc", type="int", default=16)
    parser.add_option("--cacheline_size", type="int", default=64)

    # Enable Ruby
    parser.add_option("--ruby", action="store_true")

    # Run duration options
    parser.add_option("-m", "--abs-max-tick", type="int", default=m5.MaxTick,
                      metavar="TICKS", help="Run to absolute simulated tick "
                      "specified including ticks from a restored checkpoint")
    parser.add_option("--rel-max-tick", type="int", default=None,
                      metavar="TICKS", help="Simulate for specified number of"
                      " ticks relative to the simulation start tick (e.g. if "
                      "restoring a checkpoint)")
    parser.add_option("--maxtime", type="float", default=None,
                      help="Run to the specified absolute simulated time in "
                      "seconds")
Пример #5
0
def addNoISAOptions(parser):
    parser.add_option("-n", "--num-cpus", type="int", default=1)
    parser.add_option("--sys-voltage", action="store", type="string",
                      default='1.0V',
                      help = """Top-level voltage for blocks running at system
                      power supply""")
    parser.add_option("--sys-clock", action="store", type="string",
                      default='1GHz',
                      help = """Top-level clock for blocks running at system
                      speed""")

    # Memory Options
    parser.add_option("--list-mem-types",
                      action="callback", callback=_listMemTypes,
                      help="List available memory types")
    parser.add_option("--mem-type", type="choice", default="DDR3_1600_x64",
                      choices=MemConfig.mem_names(),
                      help = "type of memory to use")
    parser.add_option("--mem-channels", type="int", default=1,
                      help = "number of memory channels")
    parser.add_option("--mem-ranks", type="int", default=None,
                      help = "number of memory ranks per channel")
    parser.add_option("--mem-size", action="store", type="string",
                      default="512MB",
                      help="Specify the physical memory size (single memory)")
    parser.add_option("--memchecker", action="store_true")

    # Cache Options
    parser.add_option("--external-memory-system", type="string",
                      help="use external ports of this port_type for caches")
    parser.add_option("--tlm-memory", type="string",
                      help="use external port for SystemC TLM cosimulation")
    parser.add_option("--caches", action="store_true")
    parser.add_option("--l2cache", action="store_true")
    parser.add_option("--num-dirs", type="int", default=1)
    parser.add_option("--num-l2caches", type="int", default=1)
    parser.add_option("--num-l3caches", type="int", default=1)
    parser.add_option("--l1d_size", type="string", default="64kB")
    parser.add_option("--l1i_size", type="string", default="32kB")
    parser.add_option("--l2_size", type="string", default="2MB")
    parser.add_option("--l3_size", type="string", default="16MB")
    parser.add_option("--l1d_assoc", type="int", default=2)
    parser.add_option("--l1i_assoc", type="int", default=2)
    parser.add_option("--l2_assoc", type="int", default=8)
    parser.add_option("--l3_assoc", type="int", default=16)
    parser.add_option("--cacheline_size", type="int", default=64)

    # Enable Ruby
    parser.add_option("--ruby", action="store_true")

    # Run duration options
    parser.add_option("-m", "--abs-max-tick", type="int", default=m5.MaxTick,
                      metavar="TICKS", help="Run to absolute simulated tick "
                      "specified including ticks from a restored checkpoint")
    parser.add_option("--rel-max-tick", type="int", default=None,
                      metavar="TICKS", help="Simulate for specified number of"
                      " ticks relative to the simulation start tick (e.g. if "
                      "restoring a checkpoint)")
    parser.add_option("--maxtime", type="float", default=None,
                      help="Run to the specified absolute simulated time in "
                      "seconds")
Пример #6
0
import subprocess

import m5
from m5.objects import *
from m5.util import addToPath

addToPath("../")

from common import MemConfig
from common import HMC

parser = optparse.OptionParser()

# Use a HMC_2500_x32 by default
parser.add_option(
    "--mem-type", type="choice", default="HMC_2500_x32", choices=MemConfig.mem_names(), help="type of memory to use"
)

parser.add_option("--ranks", "-r", type="int", default=1, help="Number of ranks to iterate across")

parser.add_option("--rd_perc", type="int", default=100, help="Percentage of read commands")

parser.add_option(
    "--mode",
    type="choice",
    default="DRAM",
    choices=["DRAM", "DRAM_ROTATE", "RANDOM"],
    help="DRAM: Random traffic; \
                          DRAM_ROTATE: Traffic rotating across banks and ranks",
)
Пример #7
0
def addNoISAOptions(parser):
    parser.add_option("-n", "--num-cpus", type="int", default=1)
    parser.add_option("--sys-voltage",
                      action="store",
                      type="string",
                      default='1.0V',
                      help="""Top-level voltage for blocks running at system
                      power supply""")
    parser.add_option("--sys-clock",
                      action="store",
                      type="string",
                      default='1GHz',
                      help="""Top-level clock for blocks running at system
                      speed""")

    # Memory Options
    parser.add_option("--list-mem-types",
                      action="callback",
                      callback=_listMemTypes,
                      help="List available memory types")
    parser.add_option("--mem-type",
                      type="choice",
                      default="DDR3_1600_8x8",
                      choices=MemConfig.mem_names(),
                      help="type of memory to use")
    parser.add_option("--mem-channels",
                      type="int",
                      default=1,
                      help="number of memory channels")
    parser.add_option("--mem-ranks",
                      type="int",
                      default=None,
                      help="number of memory ranks per channel")
    parser.add_option("--mem-size",
                      action="store",
                      type="string",
                      default="512MB",
                      help="Specify the physical memory size (single memory)")

    parser.add_option("--memchecker", action="store_true")

    # Cache Options
    parser.add_option("--external-memory-system",
                      type="string",
                      help="use external ports of this port_type for caches")
    parser.add_option("--tlm-memory",
                      type="string",
                      help="use external port for SystemC TLM cosimulation")
    parser.add_option("--caches", action="store_true")
    parser.add_option("--l2cache", action="store_true")
    parser.add_option("--num-dirs", type="int", default=1)
    parser.add_option("--num-l2caches", type="int", default=1)
    parser.add_option("--num-l3caches", type="int", default=1)
    parser.add_option("--l1d_size", type="string", default="64kB")
    parser.add_option("--l1i_size", type="string", default="32kB")
    parser.add_option("--l2_size", type="string", default="2MB")
    parser.add_option("--l3_size", type="string", default="16MB")
    parser.add_option("--l1d_assoc", type="int", default=2)
    parser.add_option("--l1i_assoc", type="int", default=2)
    parser.add_option("--l2_assoc", type="int", default=8)
    parser.add_option("--l3_assoc", type="int", default=16)
    parser.add_option("--cacheline_size", type="int", default=64)

    # SPM Options
    parser.add_option("--spm_pageshift", type="int", default=9)
    parser.add_option("--spm_size", type="string", default="1kB")
    parser.add_option("--spm_assoc", type="int", default=2)
    parser.add_option("--th", type="int", default=16)
    parser.add_option("--timeGap", type="int", default=1000000)
    parser.add_option("--accessFre", type="int", default=16)
    parser.add_option("--accessTh", type="int", default=328)
    parser.add_option("--myPlan", type="int", default=0)
    parser.add_option("--eCache", type="int", default=8)
    parser.add_option("--eSPM", type="int", default=6)
    parser.add_option("--eDRAM", type="int", default=345)

    # Enable Ruby
    parser.add_option("--ruby", action="store_true")

    # Run duration options
    parser.add_option("-m",
                      "--abs-max-tick",
                      type="int",
                      default=m5.MaxTick,
                      metavar="TICKS",
                      help="Run to absolute simulated tick "
                      "specified including ticks from a restored checkpoint")
    parser.add_option("--rel-max-tick",
                      type="int",
                      default=None,
                      metavar="TICKS",
                      help="Simulate for specified number of"
                      " ticks relative to the simulation start tick (e.g. if "
                      "restoring a checkpoint)")
    parser.add_option("--maxtime",
                      type="float",
                      default=None,
                      help="Run to the specified absolute simulated time in "
                      "seconds")
    parser.add_option(
        "-P",
        "--param",
        action="append",
        default=[],
        help="Set a SimObject parameter relative to the root node. "
        "An extended Python multi range slicing syntax can be used "
        "for arrays. For example: "
        "'system.cpu[0,1,3:8:2].max_insts_all_threads = 42' "
        "sets max_insts_all_threads for cpus 0, 1, 3, 5 and 7 "
        "Direct parameters of the root object are not accessible, "
        "only parameters of its children.")
Пример #8
0
# this script is helpful to sweep the efficiency of a specific memory
# controller configuration, by varying the number of banks accessed,
# and the sequential stride size (how many bytes per activate), and
# observe what bus utilisation (bandwidth) is achieved

parser = optparse.OptionParser()

dram_generators = {
    "DRAM" : lambda x: x.createDram,
    "DRAM_ROTATE" : lambda x: x.createDramRot,
}

# Use a single-channel DDR3-1600 x64 (8x8 topology) by default
parser.add_option("--mem-type", type="choice", default="DDR3_1600_8x8",
                  choices=MemConfig.mem_names(),
                  help = "type of memory to use")

parser.add_option("--mem-ranks", "-r", type="int", default=1,
                  help = "Number of ranks to iterate across")

parser.add_option("--rd_perc", type="int", default=100,
                  help = "Percentage of read commands")

parser.add_option("--mode", type="choice", default="DRAM",
                  choices=dram_generators.keys(),
                  help = "DRAM: Random traffic; \
                          DRAM_ROTATE: Traffic rotating across banks and ranks")

parser.add_option("--addr_map", type="int", default=1,
                  help = "0: RoCoRaBaCh; 1: RoRaBaCoCh/RoRaBaChCo")
Пример #9
0
def main():
    parser = argparse.ArgumentParser(epilog=__doc__)

    parser.add_argument("--kernel",
                        type=str,
                        default=None,
                        help="Binary to run")
    parser.add_argument("--disk-image",
                        type=str,
                        default=None,
                        help="Disk to instantiate")
    parser.add_argument("--readfile",
                        type=str,
                        default="",
                        help="File to return with the m5 readfile command")
    parser.add_argument("--cpu",
                        type=str,
                        choices=cpu_types.keys(),
                        default="atomic",
                        help="CPU model to use")
    parser.add_argument("--cpu-freq", type=str, default="4GHz")
    parser.add_argument("--num-cores",
                        type=int,
                        default=1,
                        help="Number of CPU cores")
    parser.add_argument("--mem-type",
                        default="DDR3_1600_8x8",
                        choices=MemConfig.mem_names(),
                        help="type of memory to use")
    parser.add_argument("--mem-channels",
                        type=int,
                        default=1,
                        help="number of memory channels")
    parser.add_argument("--mem-ranks",
                        type=int,
                        default=None,
                        help="number of memory ranks per channel")
    parser.add_argument("--mem-size",
                        action="store",
                        type=str,
                        default="2GB",
                        help="Specify the physical memory size")
    parser.add_argument("--checkpoint", action="store_true")
    parser.add_argument("--restore", type=str, default=None)
    parser.add_argument("--dtb-gen",
                        action="store_true",
                        help="Doesn't run simulation, it generates a DTB only")

    args = parser.parse_args()

    root = Root(full_system=True)
    root.system = create(args)

    if args.restore is not None:
        m5.instantiate(args.restore)
    else:
        m5.instantiate()

    if args.dtb_gen:
        # No run, autogenerate DTB and exit
        root.system.generateDtb(m5.options.outdir, 'system.dtb')
    else:
        run(args)
Пример #10
0
def addNoISAOptions(parser):
    parser.add_option("-n", "--num-cpus", type="int", default=1)
    parser.add_option("--sys-voltage", action="store", type="string",
                      default='1.0V',
                      help = """Top-level voltage for blocks running at system
                      power supply""")
    parser.add_option("--sys-clock", action="store", type="string",
                      default='1GHz',
                      help = """Top-level clock for blocks running at system
                      speed""")

    # Memory Options
    parser.add_option("--list-mem-types",
                      action="callback", callback=_listMemTypes,
                      help="List available memory types")
    parser.add_option("--mem-type", type="choice", default="DDR3_1600_8x8",
                      choices=MemConfig.mem_names(),
                      help = "type of memory to use")
    parser.add_option("--mem-channels", type="int", default=1,
                      help = "number of memory channels")
    parser.add_option("--mem-ranks", type="int", default=None,
                      help = "number of memory ranks per channel")
    parser.add_option("--mem-size", action="store", type="string",
                      default="512MB",
                      help="Specify the physical memory size (single memory)")


    parser.add_option("--memchecker", action="store_true")
    parser.add_option("--membus-width", type="int", default=16, help="System membus Width")
    parser.add_option("--membus-frontend_latency", type="int", default=3, help="System membus frontend latency")
    parser.add_option("--membus-forward_latency", type="int", default=4, help="System membus forward latency")
    parser.add_option("--membus-response_latency", type="int", default=2, help="System membus response latency")
    parser.add_option("--membus-snoop_response_latency", type="int", default=4, help="System membus snoop response latency")

    # Cache Options
    parser.add_option("--external-memory-system", type="string",
                      help="use external ports of this port_type for caches")
    parser.add_option("--tlm-memory", type="string",
                      help="use external port for SystemC TLM cosimulation")
    parser.add_option("--caches", action="store_true")
    parser.add_option("--l2cache", action="store_true")
    parser.add_option("--num-dirs", type="int", default=1)
    parser.add_option("--num-l2caches", type="int", default=1)
    parser.add_option("--num-l3caches", type="int", default=1)
    parser.add_option("--l1d_size", type="string", default="64kB")
    parser.add_option("--l1i_size", type="string", default="32kB")
    parser.add_option("--l2_size", type="string", default="2MB")
    parser.add_option("--l3_size", type="string", default="16MB")
    parser.add_option("--l1d_assoc", type="int", default=2)
    parser.add_option("--l1i_assoc", type="int", default=2)
    parser.add_option("--l2_assoc", type="int", default=8)
    parser.add_option("--l2_cluster_size", type="int", default=256, help="Number of CPUs to cluster for each l2 size")
    parser.add_option("--l3_assoc", type="int", default=16)
    parser.add_option("--cacheline_size", type="int", default=64)
    parser.add_option("--l2bus-width", type="int", default=32, help="L2 Bus Width")

    # DerivO3CPU Options
    parser.add_option("--fetchToDecodeDelay", type="int", default=1, help="Fetch to decode delay")
    parser.add_option("--decodeToRenameDelay", type="int", default=1, help="Decode to rename delay")
    parser.add_option("--renameToIEWDelay", type="int", default=2, help="Rename to IEW delay")
    parser.add_option("--iewToCommitDelay", type="int", default=1, help="Issue/Execute/Writeback to commit")
    parser.add_option("--issueToExecuteDelay", type="int", default=1, help="Issue to execute delay")
    parser.add_option("--renameToROBDelay", type="int", default=1, help="Rename to reorder buffer delay") 
    parser.add_option("--fetchWidth", type="int", default=5, help="Fetch width")
    parser.add_option("--decodeWidth", type="int", default=5, help="Decode width")
    parser.add_option("--renameWidth", type="int", default=5, help="Rename width")
    parser.add_option("--dispatchWidth", type="int", default=5, help="Dispatch width")
    parser.add_option("--issueWidth", type="int", default=5, help="issue width")
    parser.add_option("--wbWidth", type="int", default=5, help="Writeback width")
    parser.add_option("--commitWidth", type="int", default=5, help="Commit width")
    parser.add_option("--squashWidth", type="int", default=5, help="Squash width")
    parser.add_option("--numPhysIntRegs", type="int", default=256, help="Number of physical integer registers")    
    parser.add_option("--numPhysFloatRegs", type="int", default=256, help="Number of physical floating registers")
    parser.add_option("--numPhysVecRegs", type="int", default=256, help="Number of physical vector registers")
    parser.add_option("--numROBEntries", type="int", default=128, help="Number of reorder buffer entries")
   


    # Enable Ruby
    parser.add_option("--ruby", action="store_true")

    # Run duration options
    parser.add_option("-m", "--abs-max-tick", type="int", default=m5.MaxTick,
                      metavar="TICKS", help="Run to absolute simulated tick "
                      "specified including ticks from a restored checkpoint")
    parser.add_option("--rel-max-tick", type="int", default=None,
                      metavar="TICKS", help="Simulate for specified number of"
                      " ticks relative to the simulation start tick (e.g. if "
                      "restoring a checkpoint)")
    parser.add_option("--maxtime", type="float", default=None,
                      help="Run to the specified absolute simulated time in "
                      "seconds")
Пример #11
0
def addNoISAOptions(parser):
    parser.add_option("-n", "--num-cpus", type="int", default=1)
    parser.add_option("--sys-voltage", action="store", type="string",
                      default='1.0V',
                      help = """Top-level voltage for blocks running at system
                      power supply""")
    parser.add_option("--sys-clock", action="store", type="string",
                      default='1GHz',
                      help = """Top-level clock for blocks running at system
                      speed""")

    # Memory Options
    parser.add_option("--list-mem-types",
                      action="callback", callback=_listMemTypes,
                      help="List available memory types")
    parser.add_option("--mem-type", type="choice", default="DDR3_1600_8x8",
                      choices=MemConfig.mem_names(),
                      help = "type of memory to use")
    parser.add_option("--mem-channels", type="int", default=1,
                      help = "number of memory channels")
    parser.add_option("--mem-ranks", type="int", default=None,
                      help = "number of memory ranks per channel")
    parser.add_option("--mem-size", action="store", type="string",
                      default="512MB",
                      help="Specify the physical memory size (single memory)")


    parser.add_option("--memchecker", action="store_true")

    # Cache Options
    parser.add_option("--external-memory-system", type="string",
                      help="use external ports of this port_type for caches")
    parser.add_option("--tlm-memory", type="string",
                      help="use external port for SystemC TLM cosimulation")
    parser.add_option("--caches", action="store_true")
    parser.add_option("--l2cache", action="store_true")
    parser.add_option("--num-dirs", type="int", default=1)
    parser.add_option("--num-l2caches", type="int", default=1)
    parser.add_option("--num-l3caches", type="int", default=1)
    parser.add_option("--l1d_size", type="string", default="64kB")
    parser.add_option("--l1i_size", type="string", default="32kB")
    parser.add_option("--l2_size", type="string", default="2MB")
    parser.add_option("--l3_size", type="string", default="16MB")
    parser.add_option("--l1d_assoc", type="int", default=2)
    parser.add_option("--l1i_assoc", type="int", default=2)
    parser.add_option("--l2_assoc", type="int", default=8)
    parser.add_option("--l3_assoc", type="int", default=16)
    parser.add_option("--cacheline_size", type="int", default=64)

    # Enable Ruby
    parser.add_option("--ruby", action="store_true")

    # Run duration options
    parser.add_option("-m", "--abs-max-tick", type="int", default=m5.MaxTick,
                      metavar="TICKS", help="Run to absolute simulated tick "
                      "specified including ticks from a restored checkpoint")
    parser.add_option("--rel-max-tick", type="int", default=None,
                      metavar="TICKS", help="Simulate for specified number of"
                      " ticks relative to the simulation start tick (e.g. if "
                      "restoring a checkpoint)")
    parser.add_option("--maxtime", type="float", default=None,
                      help="Run to the specified absolute simulated time in "
                      "seconds")
    parser.add_option("-P", "--param", action="append", default=[],
        help="Set a SimObject parameter relative to the root node. "
             "An extended Python multi range slicing syntax can be used "
             "for arrays. For example: "
             "'system.cpu[0,1,3:8:2].max_insts_all_threads = 42' "
             "sets max_insts_all_threads for cpus 0, 1, 3, 5 and 7 "
             "Direct parameters of the root object are not accessible, "
             "only parameters of its children.")