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# Copyright (c) 2012 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: Jason Power
from __future__ import print_function
from __future__ import absolute_import
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_out = IntLink(link_id=self.num_int_links(), src_node=self.router,
dst_node=node.router)
link_in = IntLink(link_id=self.num_int_links(), src_node=node.router,
dst_node=self.router)
if node.extBW:
link_out.bandwidth_factor = node.extBW
link_in.bandwidth_factor = node.extBW
# if there is an internal b/w for this node
# and no ext b/w to override
elif self.intBW:
link_out.bandwidth_factor = self.intBW
link_in.bandwidth_factor = self.intBW
if node.extLatency:
link_out.latency = node.extLatency
link_in.latency = node.extLatency
elif self.intLatency:
link_out.latency = self.intLatency
link_in.latency = self.intLatency
network.int_links.append(link_out)
network.int_links.append(link_in)
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])
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