MeshDirCorners_XY.py revision 13731:67cd980cb20f
1# Copyright (c) 2010 Advanced Micro Devices, Inc. 2# All rights reserved. 3# 4# Redistribution and use in source and binary forms, with or without 5# modification, are permitted provided that the following conditions are 6# met: redistributions of source code must retain the above copyright 7# notice, this list of conditions and the following disclaimer; 8# redistributions in binary form must reproduce the above copyright 9# notice, this list of conditions and the following disclaimer in the 10# documentation and/or other materials provided with the distribution; 11# neither the name of the copyright holders nor the names of its 12# contributors may be used to endorse or promote products derived from 13# this software without specific prior written permission. 14# 15# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 18# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 19# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 21# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26# 27# Authors: Brad Beckmann 28 29from m5.params import * 30from m5.objects import * 31 32from BaseTopology import SimpleTopology 33 34# Creates a Mesh topology with 4 directories, one at each corner. 35# One L1 (and L2, depending on the protocol) are connected to each router. 36# XY routing is enforced (using link weights) to guarantee deadlock freedom. 37 38class MeshDirCorners_XY(SimpleTopology): 39 description='MeshDirCorners_XY' 40 41 def __init__(self, controllers): 42 self.nodes = controllers 43 44 def makeTopology(self, options, network, IntLink, ExtLink, Router): 45 nodes = self.nodes 46 47 num_routers = options.num_cpus 48 num_rows = options.mesh_rows 49 50 # default values for link latency and router latency. 51 # Can be over-ridden on a per link/router basis 52 link_latency = options.link_latency # used by simple and garnet 53 router_latency = options.router_latency # only used by garnet 54 55 56 # First determine which nodes are cache cntrls vs. dirs vs. dma 57 cache_nodes = [] 58 dir_nodes = [] 59 dma_nodes = [] 60 for node in nodes: 61 if node.type == 'L1Cache_Controller' or \ 62 node.type == 'L2Cache_Controller': 63 cache_nodes.append(node) 64 elif node.type == 'Directory_Controller': 65 dir_nodes.append(node) 66 elif node.type == 'DMA_Controller': 67 dma_nodes.append(node) 68 69 # Obviously the number or rows must be <= the number of routers 70 # and evenly divisible. Also the number of caches must be a 71 # multiple of the number of routers and the number of directories 72 # must be four. 73 assert(num_rows > 0 and num_rows <= num_routers) 74 num_columns = int(num_routers / num_rows) 75 assert(num_columns * num_rows == num_routers) 76 caches_per_router, remainder = divmod(len(cache_nodes), num_routers) 77 assert(remainder == 0) 78 assert(len(dir_nodes) == 4) 79 80 # Create the routers in the mesh 81 routers = [Router(router_id=i, latency = router_latency) \ 82 for i in range(num_routers)] 83 network.routers = routers 84 85 # link counter to set unique link ids 86 link_count = 0 87 88 # Connect each cache controller to the appropriate router 89 ext_links = [] 90 for (i, n) in enumerate(cache_nodes): 91 cntrl_level, router_id = divmod(i, num_routers) 92 assert(cntrl_level < caches_per_router) 93 ext_links.append(ExtLink(link_id=link_count, ext_node=n, 94 int_node=routers[router_id], 95 latency = link_latency)) 96 link_count += 1 97 98 # Connect the dir nodes to the corners. 99 ext_links.append(ExtLink(link_id=link_count, ext_node=dir_nodes[0], 100 int_node=routers[0], 101 latency = link_latency)) 102 link_count += 1 103 ext_links.append(ExtLink(link_id=link_count, ext_node=dir_nodes[1], 104 int_node=routers[num_columns - 1], 105 latency = link_latency)) 106 link_count += 1 107 ext_links.append(ExtLink(link_id=link_count, ext_node=dir_nodes[2], 108 int_node=routers[num_routers - num_columns], 109 latency = link_latency)) 110 link_count += 1 111 ext_links.append(ExtLink(link_id=link_count, ext_node=dir_nodes[3], 112 int_node=routers[num_routers - 1], 113 latency = link_latency)) 114 link_count += 1 115 116 # Connect the dma nodes to router 0. These should only be DMA nodes. 117 for (i, node) in enumerate(dma_nodes): 118 assert(node.type == 'DMA_Controller') 119 ext_links.append(ExtLink(link_id=link_count, ext_node=node, 120 int_node=routers[0], 121 latency = link_latency)) 122 123 network.ext_links = ext_links 124 125 # Create the mesh links. 126 int_links = [] 127 128 # East output to West input links (weight = 1) 129 for row in range(num_rows): 130 for col in range(num_columns): 131 if (col + 1 < num_columns): 132 east_out = col + (row * num_columns) 133 west_in = (col + 1) + (row * num_columns) 134 int_links.append(IntLink(link_id=link_count, 135 src_node=routers[east_out], 136 dst_node=routers[west_in], 137 src_outport="East", 138 dst_inport="West", 139 latency = link_latency, 140 weight=1)) 141 link_count += 1 142 143 # West output to East input links (weight = 1) 144 for row in range(num_rows): 145 for col in range(num_columns): 146 if (col + 1 < num_columns): 147 east_in = col + (row * num_columns) 148 west_out = (col + 1) + (row * num_columns) 149 int_links.append(IntLink(link_id=link_count, 150 src_node=routers[west_out], 151 dst_node=routers[east_in], 152 src_outport="West", 153 dst_inport="East", 154 latency = link_latency, 155 weight=1)) 156 link_count += 1 157 158 # North output to South input links (weight = 2) 159 for col in range(num_columns): 160 for row in range(num_rows): 161 if (row + 1 < num_rows): 162 north_out = col + (row * num_columns) 163 south_in = col + ((row + 1) * num_columns) 164 int_links.append(IntLink(link_id=link_count, 165 src_node=routers[north_out], 166 dst_node=routers[south_in], 167 src_outport="North", 168 dst_inport="South", 169 latency = link_latency, 170 weight=2)) 171 link_count += 1 172 173 # South output to North input links (weight = 2) 174 for col in range(num_columns): 175 for row in range(num_rows): 176 if (row + 1 < num_rows): 177 north_in = col + (row * num_columns) 178 south_out = col + ((row + 1) * num_columns) 179 int_links.append(IntLink(link_id=link_count, 180 src_node=routers[south_out], 181 dst_node=routers[north_in], 182 src_outport="South", 183 dst_inport="North", 184 latency = link_latency, 185 weight=2)) 186 link_count += 1 187 188 189 network.int_links = int_links 190