b9c7b8190c
This patch detects garnet network deadlock by monitoring network interfaces. If a network interface continuously fails to allocate virtual channels for a message, a possible deadlock is detected.
122 lines
5.6 KiB
Python
122 lines
5.6 KiB
Python
# 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.
|
|
#
|
|
# Authors: Tushar Krishna
|
|
|
|
import math
|
|
import m5
|
|
from m5.objects import *
|
|
from m5.defines import buildEnv
|
|
from m5.util import addToPath, fatal
|
|
|
|
def define_options(parser):
|
|
# By default, ruby uses the simple timing cpu
|
|
parser.set_defaults(cpu_type="timing")
|
|
|
|
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', 'garnet2.0'],
|
|
help="'simple'|'garnet2.0'")
|
|
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 garnet2.0/RoutingUnit.cc)
|
|
2: Custom (see garnet2.0/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):
|
|
|
|
# Set the network classes based on the command line options
|
|
if options.network == "garnet2.0":
|
|
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 == "garnet2.0":
|
|
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
|
|
|
|
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 == "garnet2.0")
|
|
network.enable_fault_model = True
|
|
network.fault_model = FaultModel()
|