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gem5/configs/network/Network.py
Srikant Bharadwaj 7957b1c43b mem-garnet: Upgrade garnet version to 3.0 
This version of garnet includes HeteroGarnet which
supports heterogenous interconnect systems, flexible
router and link configurations, and better debugging
resources.
This patch changes the garnet directory structure
to not include the version number. The user will be
informed about the garnet version being used.

Change-Id: Id4763421528305193ae0cd10c159b385a9513553
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/34259
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
2020-09-11 05:38:09 +00:00

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# Copyright (c) 2016 Georgia Institute of Technology
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# 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.
from __future__ import print_function
from __future__ import absolute_import
import math
import m5
from m5.objects import *
from m5.defines import buildEnv
from m5.util import addToPath, fatal, warn
def define_options(parser):
# By default, ruby uses the simple timing cpu
parser.set_defaults(cpu_type="TimingSimpleCPU")
parser.add_option("--topology", type="string", default="Crossbar",
help="check configs/topologies for complete set")
parser.add_option("--mesh-rows", type="int", default=0,
help="the number of rows in the mesh topology")
parser.add_option("--network", type="choice", default="simple",
choices=['simple', 'garnet'],
help="""'simple'|'garnet' (garnet2.0 will be
deprecated.)""")
parser.add_option("--router-latency", action="store", type="int",
default=1,
help="""number of pipeline stages in the garnet router.
Has to be >= 1.
Can be over-ridden on a per router basis
in the topology file.""")
parser.add_option("--link-latency", action="store", type="int", default=1,
help="""latency of each link the simple/garnet networks.
Has to be >= 1.
Can be over-ridden on a per link basis
in the topology file.""")
parser.add_option("--link-width-bits", action="store", type="int",
default=128,
help="width in bits for all links inside garnet.")
parser.add_option("--vcs-per-vnet", action="store", type="int", default=4,
help="""number of virtual channels per virtual network
inside garnet network.""")
parser.add_option("--routing-algorithm", action="store", type="int",
default=0,
help="""routing algorithm in network.
0: weight-based table
1: XY (for Mesh. see garnet/RoutingUnit.cc)
2: Custom (see garnet/RoutingUnit.cc""")
parser.add_option("--network-fault-model", action="store_true",
default=False,
help="""enable network fault model:
see src/mem/ruby/network/fault_model/""")
parser.add_option("--garnet-deadlock-threshold", action="store",
type="int", default=50000,
help="network-level deadlock threshold.")
def create_network(options, ruby):
# Allow legacy users to use garnet through garnet2.0 option
# until next gem5 release.
if options.network == "garnet2.0":
warn("Usage of option 'garnet2.0' will be depracated. " \
"Please use 'garnet' for using the latest garnet " \
"version. Current version: 3.0")
options.network = "garnet"
# Set the network classes based on the command line options
if options.network == "garnet":
NetworkClass = GarnetNetwork
IntLinkClass = GarnetIntLink
ExtLinkClass = GarnetExtLink
RouterClass = GarnetRouter
InterfaceClass = GarnetNetworkInterface
else:
NetworkClass = SimpleNetwork
IntLinkClass = SimpleIntLink
ExtLinkClass = SimpleExtLink
RouterClass = Switch
InterfaceClass = None
# Instantiate the network object
# so that the controllers can connect to it.
network = NetworkClass(ruby_system = ruby, topology = options.topology,
routers = [], ext_links = [], int_links = [], netifs = [])
return (network, IntLinkClass, ExtLinkClass, RouterClass, InterfaceClass)
def init_network(options, network, InterfaceClass):
if options.network == "garnet":
network.num_rows = options.mesh_rows
network.vcs_per_vnet = options.vcs_per_vnet
network.ni_flit_size = options.link_width_bits / 8
network.routing_algorithm = options.routing_algorithm
network.garnet_deadlock_threshold = options.garnet_deadlock_threshold
# Create Bridges and connect them to the corresponding links
for intLink in network.int_links:
intLink.src_net_bridge = NetworkBridge(
link = intLink.network_link,
vtype = 'OBJECT_LINK',
width = intLink.src_node.width)
intLink.src_cred_bridge = NetworkBridge(
link = intLink.credit_link,
vtype = 'LINK_OBJECT',
width = intLink.src_node.width)
intLink.dst_net_bridge = NetworkBridge(
link = intLink.network_link,
vtype = 'LINK_OBJECT',
width = intLink.dst_node.width)
intLink.dst_cred_bridge = NetworkBridge(
link = intLink.credit_link,
vtype = 'OBJECT_LINK',
width = intLink.dst_node.width)
for extLink in network.ext_links:
ext_net_bridges = []
ext_net_bridges.append(NetworkBridge(link =
extLink.network_links[0],
vtype = 'OBJECT_LINK',
width = extLink.width))
ext_net_bridges.append(NetworkBridge(link =
extLink.network_links[1],
vtype = 'LINK_OBJECT',
width = extLink.width))
extLink.ext_net_bridge = ext_net_bridges
ext_credit_bridges = []
ext_credit_bridges.append(NetworkBridge(link =
extLink.credit_links[0],
vtype = 'LINK_OBJECT',
width = extLink.width))
ext_credit_bridges.append(NetworkBridge(link =
extLink.credit_links[1],
vtype = 'OBJECT_LINK',
width = extLink.width))
extLink.ext_cred_bridge = ext_credit_bridges
int_net_bridges = []
int_net_bridges.append(NetworkBridge(link =
extLink.network_links[0],
vtype = 'LINK_OBJECT',
width = extLink.int_node.width))
int_net_bridges.append(NetworkBridge(link =
extLink.network_links[1],
vtype = 'OBJECT_LINK',
width = extLink.int_node.width))
extLink.int_net_bridge = int_net_bridges
int_cred_bridges = []
int_cred_bridges.append(NetworkBridge(link =
extLink.credit_links[0],
vtype = 'OBJECT_LINK',
width = extLink.int_node.width))
int_cred_bridges.append(NetworkBridge(link =
extLink.credit_links[1],
vtype = 'LINK_OBJECT',
width = extLink.int_node.width))
extLink.int_cred_bridge = int_cred_bridges
if options.network == "simple":
network.setup_buffers()
if InterfaceClass != None:
netifs = [InterfaceClass(id=i) \
for (i,n) in enumerate(network.ext_links)]
network.netifs = netifs
if options.network_fault_model:
assert(options.network == "garnet")
network.enable_fault_model = True
network.fault_model = FaultModel()
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