--- /dev/null
+# Copyright (c) 2015 The University of Illinois Urbana Champaign
+# 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: Mohammad Alian
+
+# This is an example of an n port network switch to work in dist-gem5.
+# Users can extend this to have different different topologies
+
+import optparse
+import sys
+
+import m5
+from m5.defines import buildEnv
+from m5.objects import *
+from m5.util import addToPath, fatal
+
+addToPath('../common')
+
+import Simulation
+import Options
+
+def build_switch(options):
+ # instantiate an EtherSwitch
+ switch = EtherSwitch()
+ # instantiate distEtherLinks to connect switch ports
+ # to other gem5 instances
+ switch.portlink = [DistEtherLink(speed = options.ethernet_linkspeed,
+ delay = options.ethernet_linkdelay,
+ dist_rank = options.dist_rank,
+ dist_size = options.dist_size,
+ server_name = options.dist_server_name,
+ server_port = options.dist_server_port,
+ sync_start = options.dist_sync_start,
+ sync_repeat = options.dist_sync_repeat,
+ is_switch = True,
+ num_nodes = options.dist_size)
+ for i in xrange(options.dist_size)]
+
+ for (i, link) in enumerate(switch.portlink):
+ link.int0 = switch.interface[i]
+
+ return switch
+# Add options
+parser = optparse.OptionParser()
+Options.addCommonOptions(parser)
+Options.addFSOptions(parser)
+(options, args) = parser.parse_args()
+
+system = build_switch(options)
+root = Root(full_system = True, system = system)
+Simulation.run(options, root, None, None)
+
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