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.
This commit is contained in:
Brad Beckmann 2010-03-21 21:22:20 -07:00
parent 391b4e64e6
commit 1765badda2
2 changed files with 128 additions and 0 deletions

View file

@ -31,6 +31,8 @@ import m5
from m5.objects import *
from m5.defines import buildEnv
from m5.util import addToPath
addToPath('../ruby/networks')
from MeshDirCorners import *
protocol = buildEnv['PROTOCOL']
@ -60,6 +62,14 @@ def create_system(options, physmem, piobus = None, dma_devices = []):
len(cpu_sequencers),
options.mesh_rows)
elif options.topology == "mesh_dir_corner":
#
# The uniform mesh topology assumes one router per cpu
#
net_topology = makeMeshDirCorners(all_cntrls,
len(cpu_sequencers),
options.mesh_rows)
if options.garnet_network == "fixed":
network = GarnetNetwork_d(topology = net_topology)
elif options.garnet_network == "flexible":

View file

@ -0,0 +1,118 @@
# 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 *
#
# This file contains a special network creation function. This networks is not
# general and will only work with specific system configurations. The network
# specified is similar to GEMS old file specified network.
#
def makeMeshDirCorners(nodes, num_routers, num_rows):
#
# First determine which nodes are cache cntrls vs. dirs vs. dma
#
cache_nodes = []
dir_nodes = []
dma_nodes = []
for node in nodes:
if node.type == 'L1Cache_Controller' or \
node.type == 'L2Cache_Controller':
cache_nodes.append(node)
elif node.type == 'Directory_Controller':
dir_nodes.append(node)
elif node.type == 'DMA_Controller':
dma_nodes.append(node)
#
# Obviously the number or rows must be <= the number of routers and evenly
# divisible. Also the number of caches must be a multiple of the number of
# routers and the number of directories must be four.
#
assert(num_rows <= num_routers)
num_columns = int(num_routers / num_rows)
assert(num_columns * num_rows == num_routers)
caches_per_router, remainder = divmod(len(cache_nodes), num_routers)
assert(remainder == 0)
assert(len(dir_nodes) == 4)
#
# Connect each cache controller to the appropriate router
#
ext_links = []
for (i, n) in enumerate(cache_nodes):
cntrl_level, router_id = divmod(i, num_routers)
assert(cntrl_level < caches_per_router)
ext_links.append(ExtLink(ext_node=n, int_node=router_id))
#
# Connect the dir nodes to the corners.
#
ext_links.append(ExtLink(ext_node=dir_nodes[0], int_node=0))
ext_links.append(ExtLink(ext_node=dir_nodes[1], int_node=(num_columns - 1)))
ext_links.append(ExtLink(ext_node=dir_nodes[2],
int_node=(num_routers - num_columns)))
ext_links.append(ExtLink(ext_node=dir_nodes[3], int_node=(num_routers - 1)))
#
# Connect the dma nodes to router 0. These should only be DMA nodes.
#
for (i, node) in enumerate(dma_nodes):
assert(node.type == 'DMA_Controller')
ext_links.append(ExtLink(ext_node=node, int_node=0))
#
# 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(node_a=east_id,
node_b=west_id,
weight=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(node_a=north_id,
node_b=south_id,
weight=2))
return Topology(ext_links=ext_links,
int_links=int_links,
num_int_nodes=num_routers)