dbe8892b76
Revamped version of garnet with more optimized single-cycle routers, more configurability, and cleaner code.
118 lines
5.3 KiB
Python
118 lines
5.3 KiB
Python
# Copyright (c) 2016 Georgia Institute of Technology
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met: redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer;
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# redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution;
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# neither the name of the copyright holders nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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# Authors: Tushar Krishna
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import math
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import m5
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from m5.objects import *
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from m5.defines import buildEnv
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from m5.util import addToPath, fatal
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def define_options(parser):
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# By default, ruby uses the simple timing cpu
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parser.set_defaults(cpu_type="timing")
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parser.add_option("--topology", type="string", default="Crossbar",
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help="check configs/topologies for complete set")
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parser.add_option("--mesh-rows", type="int", default=0,
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help="the number of rows in the mesh topology")
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parser.add_option("--network", type="choice", default="simple",
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choices=['simple', 'garnet2.0'],
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help="'simple'|'garnet2.0'")
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parser.add_option("--router-latency", action="store", type="int",
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default=1,
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help="""number of pipeline stages in the garnet router.
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Has to be >= 1.
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Can be over-ridden on a per router basis
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in the topology file.""")
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parser.add_option("--link-latency", action="store", type="int", default=1,
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help="""latency of each link the simple/garnet networks.
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Has to be >= 1.
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Can be over-ridden on a per link basis
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in the topology file.""")
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parser.add_option("--link-width-bits", action="store", type="int",
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default=128,
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help="width in bits for all links inside garnet.")
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parser.add_option("--vcs-per-vnet", action="store", type="int", default=4,
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help="""number of virtual channels per virtual network
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inside garnet network.""")
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parser.add_option("--routing-algorithm", action="store", type="int",
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default=0,
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help="""routing algorithm in network.
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0: weight-based table
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1: XY (for Mesh. see garnet2.0/RoutingUnit.cc)
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2: Custom (see garnet2.0/RoutingUnit.cc""")
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parser.add_option("--network-fault-model", action="store_true",
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default=False,
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help="""enable network fault model:
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see src/mem/ruby/network/fault_model/""")
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def create_network(options, ruby):
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# Set the network classes based on the command line options
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if options.network == "garnet2.0":
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NetworkClass = GarnetNetwork
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IntLinkClass = GarnetIntLink
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ExtLinkClass = GarnetExtLink
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RouterClass = GarnetRouter
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InterfaceClass = GarnetNetworkInterface
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else:
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NetworkClass = SimpleNetwork
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IntLinkClass = SimpleIntLink
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ExtLinkClass = SimpleExtLink
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RouterClass = Switch
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InterfaceClass = None
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# Instantiate the network object
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# so that the controllers can connect to it.
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network = NetworkClass(ruby_system = ruby, topology = options.topology,
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routers = [], ext_links = [], int_links = [], netifs = [])
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return (network, IntLinkClass, ExtLinkClass, RouterClass, InterfaceClass)
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def init_network(options, network, InterfaceClass):
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if options.network == "garnet2.0":
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network.num_rows = options.mesh_rows
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network.vcs_per_vnet = options.vcs_per_vnet
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network.ni_flit_size = options.link_width_bits / 8
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network.routing_algorithm = options.routing_algorithm
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if options.network == "simple":
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network.setup_buffers()
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if InterfaceClass != None:
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netifs = [InterfaceClass(id=i) \
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for (i,n) in enumerate(network.ext_links)]
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network.netifs = netifs
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if options.network_fault_model:
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assert(options.network == "garnet2.0")
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network.enable_fault_model = True
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network.fault_model = FaultModel()
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