gem5/configs/ruby/Ruby.py

# Copyright (c) 2012 ARM Limited
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#
# The license below extends only to copyright in the software and shall
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# to a hardware implementation of the functionality of the software
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# unmodified and in its entirety in all distributions of the software,
# modified or unmodified, in source code or in binary form.
#
# Copyright (c) 2006-2007 The Regents of The University of Michigan
# Copyright (c) 2009 Advanced Micro Devices, Inc.
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#
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# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
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# neither the name of the copyright holders nor the names of its
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# this software without specific prior written permission.
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# Authors: Brad Beckmann

import math
import m5
from m5.objects import *
from m5.defines import buildEnv

def define_options(parser):
    # ruby network options
    parser.add_option("--topology", type="string", default="Crossbar",
                 help="check src/mem/ruby/network/topologies for complete set")
    parser.add_option("--mesh-rows", type="int", default=1,
                      help="the number of rows in the mesh topology")
    parser.add_option("--garnet-network", type="string", default=None,
                      help="'fixed'|'flexible'")
    parser.add_option("--network-fault-model", action="store_true", default=False,
                      help="enable network fault model: see src/mem/ruby/network/fault_model/")

    # ruby mapping options
    parser.add_option("--numa-high-bit", type="int", default=0,
                      help="high order address bit to use for numa mapping. " \
                           "0 = highest bit, not specified = lowest bit")

    # ruby sparse memory options
    parser.add_option("--use-map", action="store_true", default=False)
    parser.add_option("--map-levels", type="int", default=4)

    parser.add_option("--recycle-latency", type="int", default=10,
                      help="Recycle latency for ruby controller input buffers")

    parser.add_option("--random_seed", type="int", default=1234,
                      help="Used for seeding the random number generator")

    parser.add_option("--ruby_stats", type="string", default="ruby.stats")

    protocol = buildEnv['PROTOCOL']
    exec "import %s" % protocol
    eval("%s.define_options(parser)" % protocol)

def create_system(options, system, piobus = None, dma_devices = []):

    system.ruby = RubySystem(clock = options.clock,
                             stats_filename = options.ruby_stats,
                             no_mem_vec = options.use_map)
    ruby = system.ruby

    protocol = buildEnv['PROTOCOL']
    exec "import %s" % protocol
    try:
        (cpu_sequencers, dir_cntrls, all_cntrls) = \
             eval("%s.create_system(options, system, piobus, \
                                    dma_devices, ruby)" \
                  % protocol)
    except:
        print "Error: could not create sytem for ruby protocol %s" % protocol
        raise

    # Create a port proxy for connecting the system port. This is
    # independent of the protocol and kept in the protocol-agnostic
    # part (i.e. here).
    sys_port_proxy = RubyPortProxy(version = 0,
                                   physMemPort = system.physmem.port,
                                   physmem = system.physmem,
                                   ruby_system = ruby)
    # Give the system port proxy a SimObject parent without creating a
    # full-fledged controller
    system.sys_port_proxy = sys_port_proxy

    #
    # Set the network classes based on the command line options
    #
    if options.garnet_network == "fixed":
        class NetworkClass(GarnetNetwork_d): pass
        class IntLinkClass(GarnetIntLink_d): pass
        class ExtLinkClass(GarnetExtLink_d): pass
        class RouterClass(GarnetRouter_d): pass
    elif options.garnet_network == "flexible":
        class NetworkClass(GarnetNetwork): pass
        class IntLinkClass(GarnetIntLink): pass
        class ExtLinkClass(GarnetExtLink): pass
        class RouterClass(GarnetRouter): pass
    else:
        class NetworkClass(SimpleNetwork): pass
        class IntLinkClass(SimpleIntLink): pass
        class ExtLinkClass(SimpleExtLink): pass
        class RouterClass(BasicRouter): pass
    
    #
    # Important: the topology must be created before the network and after the
    # controllers.
    #
    exec "import %s" % options.topology
    try:
        net_topology = eval("%s.makeTopology(all_cntrls, options, \
                                             IntLinkClass, ExtLinkClass, \
                                             RouterClass)" \
                            % options.topology)
    except:
        print "Error: could not create topology %s" % options.topology
        raise

    if options.network_fault_model:
        assert(options.garnet_network == "fixed")
        fault_model = FaultModel()
        network = NetworkClass(ruby_system = ruby, topology = net_topology,\
                               enable_fault_model=True, fault_model = fault_model)
    else:
        network = NetworkClass(ruby_system = ruby, topology = net_topology)

    #
    # Loop through the directory controlers.
    # Determine the total memory size of the ruby system and verify it is equal
    # to physmem.  However, if Ruby memory is using sparse memory in SE 
    # mode, then the system should not back-up the memory state with
    # the Memory Vector and thus the memory size bytes should stay at 0.
    # Also set the numa bits to the appropriate values.
    #
    total_mem_size = MemorySize('0B')

    dir_bits = int(math.log(options.num_dirs, 2))

    if options.numa_high_bit:
        numa_bit = options.numa_high_bit
    else:
        # if not specified, use the lowest bits above the block offest
        if dir_bits > 0:
            # add 5 because bits 0-5 are the block offset
            numa_bit = dir_bits + 5
        else:
            numa_bit = 6
        
    for dir_cntrl in dir_cntrls:
        total_mem_size.value += dir_cntrl.directory.size.value
        dir_cntrl.directory.numa_high_bit = numa_bit
        
    physmem_size = long(system.physmem.range.second) - \
                     long(system.physmem.range.first) + 1
    assert(total_mem_size.value == physmem_size)

    ruby_profiler = RubyProfiler(ruby_system = ruby,
                                 num_of_sequencers = len(cpu_sequencers))
    ruby.network = network
    ruby.profiler = ruby_profiler
    ruby.mem_size = total_mem_size
    ruby._cpu_ruby_ports = cpu_sequencers
    ruby._sys_port_proxy = sys_port_proxy
    ruby.random_seed    = options.random_seed