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authorBrad Beckmann <Brad.Beckmann@amd.com>2012-07-10 22:51:53 -0700
committerBrad Beckmann <Brad.Beckmann@amd.com>2012-07-10 22:51:53 -0700
commit11b725c19da4d08ae471678f6da867c67e3c15b5 (patch)
tree58bd0ebd09b404f0e860531bda80195f234d0bf2 /configs/topologies/Mesh.py
parent745274cbd4851b3bf725b24138c1fd13746492ec (diff)
downloadgem5-11b725c19da4d08ae471678f6da867c67e3c15b5.tar.xz
ruby: changes how Topologies are created
Instead of just passing a list of controllers to the makeTopology function in src/mem/ruby/network/topologies/<Topo>.py we pass in a function pointer which knows how to make the topology, possibly with some extra state set in the configs/ruby/<protocol>.py file. Thus, we can move all of the files from network/topologies to configs/topologies. A new class BaseTopology is added which all topologies in configs/topologies must inheirit from and follow its API. --HG-- rename : src/mem/ruby/network/topologies/Crossbar.py => configs/topologies/Crossbar.py rename : src/mem/ruby/network/topologies/Mesh.py => configs/topologies/Mesh.py rename : src/mem/ruby/network/topologies/MeshDirCorners.py => configs/topologies/MeshDirCorners.py rename : src/mem/ruby/network/topologies/Pt2Pt.py => configs/topologies/Pt2Pt.py rename : src/mem/ruby/network/topologies/Torus.py => configs/topologies/Torus.py
Diffstat (limited to 'configs/topologies/Mesh.py')
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diff --git a/configs/topologies/Mesh.py b/configs/topologies/Mesh.py
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+# Copyright (c) 2010 Advanced Micro Devices, Inc.
+# 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: Brad Beckmann
+
+from m5.params import *
+from m5.objects import *
+
+from BaseTopology import BaseTopology
+
+class Mesh(BaseTopology):
+ description='Mesh'
+
+ def __init__(self, controllers):
+ self.nodes = controllers
+
+ # Makes a generic mesh assuming an equal number of cache and directory cntrls
+
+ def makeTopology(self, options, IntLink, ExtLink, Router):
+ nodes = self.nodes
+
+ num_routers = options.num_cpus
+ num_rows = options.mesh_rows
+
+ # There must be an evenly divisible number of cntrls to routers
+ # Also, obviously the number or rows must be <= the number of routers
+ cntrls_per_router, remainder = divmod(len(nodes), num_routers)
+ assert(num_rows <= num_routers)
+ num_columns = int(num_routers / num_rows)
+ assert(num_columns * num_rows == num_routers)
+
+ # Create the routers in the mesh
+ routers = [Router(router_id=i) for i in range(num_routers)]
+
+ # link counter to set unique link ids
+ link_count = 0
+
+ # Add all but the remainder nodes to the list of nodes to be uniformly
+ # distributed across the network.
+ network_nodes = []
+ remainder_nodes = []
+ for node_index in xrange(len(nodes)):
+ if node_index < (len(nodes) - remainder):
+ network_nodes.append(nodes[node_index])
+ else:
+ remainder_nodes.append(nodes[node_index])
+
+ # Connect each node to the appropriate router
+ ext_links = []
+ for (i, n) in enumerate(network_nodes):
+ cntrl_level, router_id = divmod(i, num_routers)
+ assert(cntrl_level < cntrls_per_router)
+ ext_links.append(ExtLink(link_id=link_count, ext_node=n,
+ int_node=routers[router_id]))
+ link_count += 1
+
+ # Connect the remainding nodes to router 0. These should only be
+ # DMA nodes.
+ for (i, node) in enumerate(remainder_nodes):
+ assert(node.type == 'DMA_Controller')
+ assert(i < remainder)
+ ext_links.append(ExtLink(link_id=link_count, ext_node=node,
+ int_node=routers[0]))
+ link_count += 1
+
+ # Create the mesh links. First row (east-west) links then column
+ # (north-south) links
+ int_links = []
+ for row in xrange(num_rows):
+ for col in xrange(num_columns):
+ if (col + 1 < num_columns):
+ east_id = col + (row * num_columns)
+ west_id = (col + 1) + (row * num_columns)
+ int_links.append(IntLink(link_id=link_count,
+ node_a=routers[east_id],
+ node_b=routers[west_id],
+ weight=1))
+ link_count += 1
+
+ for col in xrange(num_columns):
+ for row in xrange(num_rows):
+ if (row + 1 < num_rows):
+ north_id = col + (row * num_columns)
+ south_id = col + ((row + 1) * num_columns)
+ int_links.append(IntLink(link_id=link_count,
+ node_a=routers[north_id],
+ node_b=routers[south_id],
+ weight=2))
+ link_count += 1
+
+ return routers, int_links, ext_links