configs/topologies/Pt2Pt.py

   1 # Copyright (c) 2011 Advanced Micro Devices, Inc.
   2 #               2011 Massachusetts Institute of Technology
   3 # All rights reserved.
   4 #
   5 # Redistribution and use in source and binary forms, with or without
   6 # modification, are permitted provided that the following conditions are
   7 # met: redistributions of source code must retain the above copyright
   8 # notice, this list of conditions and the following disclaimer;
   9 # redistributions in binary form must reproduce the above copyright
  10 # notice, this list of conditions and the following disclaimer in the
  11 # documentation and/or other materials provided with the distribution;
  12 # neither the name of the copyright holders nor the names of its
  13 # contributors may be used to endorse or promote products derived from
  14 # this software without specific prior written permission.
  15 #
  16 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  17 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  18 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  19 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  20 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  21 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  22 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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  25 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  26 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27
  28 from __future__ import print_function
  29 from __future__ import absolute_import
  30
  31 from m5.params import *
  32 from m5.objects import *
  33
  34 from topologies.BaseTopology import SimpleTopology
  35
  36 class Pt2Pt(SimpleTopology):
  37     description='Pt2Pt'
  38
  39     def __init__(self, controllers):
  40         self.nodes = controllers
  41
  42     def makeTopology(self, options, network, IntLink, ExtLink, Router):
  43         nodes = self.nodes
  44
  45         # default values for link latency and router latency.
  46         # Can be over-ridden on a per link/router basis
  47         link_latency = options.link_latency # used by simple and garnet
  48         router_latency = options.router_latency # only used by garnet
  49
  50         # Create an individual router for each controller,
  51         # and connect all to all.
  52         # Since this is a high-radix router, router_latency should
  53         # accordingly be set to a higher value than the default
  54         # (which is 1 for mesh routers)
  55         routers = [Router(router_id=i, latency = router_latency) \
  56             for i in range(len(nodes))]
  57         network.routers = routers
  58
  59         ext_links = [ExtLink(link_id=i, ext_node=n, int_node=routers[i],
  60                      latency = link_latency)
  61                     for (i, n) in enumerate(nodes)]
  62         network.ext_links = ext_links
  63
  64         link_count = len(nodes)
  65         int_links = []
  66         for i in range(len(nodes)):
  67             for j in range(len(nodes)):
  68                 if (i != j):
  69                     link_count += 1
  70                     int_links.append(IntLink(link_id=link_count,
  71                                              src_node=routers[i],
  72                                              dst_node=routers[j],
  73                                              latency = link_latency))
  74
  75         network.int_links = int_links