gem5/configs/topologies/Cluster.py
Nilay Vaish e9ae8b7d29 ruby: network: correct naming of routers
The routers are created before the network class. This results in the routers
becoming children of the first link they are connected to and they get generic
names like int_node and node_b. This patch creates the network object first
and passes it to the topology creation function. Now the routers are children
of the network object and names are much more sensible.
2013-09-06 16:21:33 -05:00

113 lines
4.7 KiB
Python

# Copyright (c) 2012 Advanced Micro Devices, Inc.
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# Authors: Jason Power
from BaseTopology import BaseTopology
class Cluster(BaseTopology):
""" A cluster is a group of nodes which are all one hop from eachother
Clusters can also contain other clusters
When creating this kind of topology, return a single cluster (usually
the root cluster) from create_system in configs/ruby/<protocol>.py
"""
_num_int_links = 0
_num_ext_links = 0
_num_routers = 0
# Below methods for auto counting
@classmethod
def num_int_links(cls):
cls._num_int_links += 1
return cls._num_int_links - 1
@classmethod
def num_ext_links(cls):
cls._num_ext_links += 1
return cls._num_ext_links - 1
@classmethod
def num_routers(cls):
cls._num_routers += 1
return cls._num_routers - 1
def __init__(self, intBW=0, extBW=0, intLatency=0, extLatency=0):
""" internalBandwidth is bandwidth of all links within the cluster
externalBandwidth is bandwidth from this cluster to any cluster
connecting to it.
internal/externalLatency are similar
**** When creating a cluster with sub-clusters, the sub-cluster
external bandwidth overrides the internal bandwidth of the
super cluster
"""
self.nodes = []
self.router = None # created in makeTopology
self.intBW = intBW
self.extBW = extBW
self.intLatency = intLatency
self.extLatency = extLatency
def add(self, node):
self.nodes.append(node)
def makeTopology(self, options, network, IntLink, ExtLink, Router):
""" Recursively make all of the links and routers
"""
# make a router to connect all of the nodes
self.router = Router(router_id=self.num_routers())
network.routers.append(self.router)
for node in self.nodes:
if type(node) == Cluster:
node.makeTopology(options, network, IntLink, ExtLink, Router)
# connect this cluster to the router
link = IntLink(link_id=self.num_int_links(), node_a=self.router, node_b=node.router)
if node.extBW:
link.bandwidth_factor = node.extBW
elif self.intBW: # if there is an interanl b/w for this node and no ext b/w to override
link.bandwidth_factor = self.intBW
if node.extLatency:
link.latency = node.extLatency
elif self.intLatency:
link.latency = self.intLatency
network.int_links.append(link)
else:
# node is just a controller connect it to the router via a ext_link
link = ExtLink(link_id=self.num_ext_links(), ext_node=node, int_node=self.router)
if self.intBW:
link.bandwidth_factor = self.intBW
if self.intLatency:
link.latency = self.intLatency
network.ext_links.append(link)
def __len__(self):
return len([i for i in self.nodes if type(i) != Cluster]) + \
sum([len(i) for i in self.nodes if type(i) == Cluster])