ruby: Added a mesh network with directories at the corners
The patch creates a specific mesh network where directories are at the corners. The patch is a good example of how to create an arbitrary network, similar to the old file specified network, while leveraging scripts and loops when possible.
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@ -31,6 +31,8 @@ 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
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addToPath('../ruby/networks')
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from MeshDirCorners import *
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protocol = buildEnv['PROTOCOL']
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@ -60,6 +62,14 @@ def create_system(options, physmem, piobus = None, dma_devices = []):
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len(cpu_sequencers),
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options.mesh_rows)
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elif options.topology == "mesh_dir_corner":
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#
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# The uniform mesh topology assumes one router per cpu
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#
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net_topology = makeMeshDirCorners(all_cntrls,
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len(cpu_sequencers),
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options.mesh_rows)
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if options.garnet_network == "fixed":
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network = GarnetNetwork_d(topology = net_topology)
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elif options.garnet_network == "flexible":
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118
configs/ruby/networks/MeshDirCorners.py
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118
configs/ruby/networks/MeshDirCorners.py
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@ -0,0 +1,118 @@
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# Copyright (c) 2010 Advanced Micro Devices, Inc.
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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: Brad Beckmann
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from m5.params import *
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from m5.objects import *
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#
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# This file contains a special network creation function. This networks is not
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# general and will only work with specific system configurations. The network
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# specified is similar to GEMS old file specified network.
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#
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def makeMeshDirCorners(nodes, num_routers, num_rows):
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#
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# First determine which nodes are cache cntrls vs. dirs vs. dma
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#
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cache_nodes = []
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dir_nodes = []
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dma_nodes = []
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for node in nodes:
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if node.type == 'L1Cache_Controller' or \
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node.type == 'L2Cache_Controller':
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cache_nodes.append(node)
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elif node.type == 'Directory_Controller':
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dir_nodes.append(node)
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elif node.type == 'DMA_Controller':
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dma_nodes.append(node)
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#
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# Obviously the number or rows must be <= the number of routers and evenly
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# divisible. Also the number of caches must be a multiple of the number of
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# routers and the number of directories must be four.
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#
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assert(num_rows <= num_routers)
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num_columns = int(num_routers / num_rows)
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assert(num_columns * num_rows == num_routers)
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caches_per_router, remainder = divmod(len(cache_nodes), num_routers)
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assert(remainder == 0)
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assert(len(dir_nodes) == 4)
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#
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# Connect each cache controller to the appropriate router
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#
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ext_links = []
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for (i, n) in enumerate(cache_nodes):
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cntrl_level, router_id = divmod(i, num_routers)
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assert(cntrl_level < caches_per_router)
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ext_links.append(ExtLink(ext_node=n, int_node=router_id))
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#
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# Connect the dir nodes to the corners.
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#
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ext_links.append(ExtLink(ext_node=dir_nodes[0], int_node=0))
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ext_links.append(ExtLink(ext_node=dir_nodes[1], int_node=(num_columns - 1)))
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ext_links.append(ExtLink(ext_node=dir_nodes[2],
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int_node=(num_routers - num_columns)))
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ext_links.append(ExtLink(ext_node=dir_nodes[3], int_node=(num_routers - 1)))
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#
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# Connect the dma nodes to router 0. These should only be DMA nodes.
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#
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for (i, node) in enumerate(dma_nodes):
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assert(node.type == 'DMA_Controller')
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ext_links.append(ExtLink(ext_node=node, int_node=0))
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#
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# Create the mesh links. First row (east-west) links then column
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# (north-south) links
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#
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int_links = []
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for row in xrange(num_rows):
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for col in xrange(num_columns):
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if (col + 1 < num_columns):
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east_id = col + (row * num_columns)
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west_id = (col + 1) + (row * num_columns)
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int_links.append(IntLink(node_a=east_id,
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node_b=west_id,
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weight=1))
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for col in xrange(num_columns):
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for row in xrange(num_rows):
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if (row + 1 < num_rows):
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north_id = col + (row * num_columns)
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south_id = col + ((row + 1) * num_columns)
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int_links.append(IntLink(node_a=north_id,
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node_b=south_id,
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weight=2))
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return Topology(ext_links=ext_links,
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int_links=int_links,
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num_int_nodes=num_routers)
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