From 9cbf4688b25514987bb714624b4cdaf51bce8085 Mon Sep 17 00:00:00 2001
From: cody burkard <cody@onlab.us>
Date: Sat, 27 Sep 2014 02:56:40 -0700
Subject: [PATCH] add 1ms delay to all links to exaggerate TCP bandwidth
decrease across an increasing number of links
---
examples/linearbandwidth.py | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)
diff --git a/examples/linearbandwidth.py b/examples/linearbandwidth.py
index 90ca2ed0..24776101 100755
--- a/examples/linearbandwidth.py
+++ b/examples/linearbandwidth.py
@@ -24,10 +24,12 @@
"""
from mininet.net import Mininet
-from mininet.node import OVSKernelSwitch, Controller
+from mininet.node import UserSwitch, OVSKernelSwitch, Controller
from mininet.topo import Topo
from mininet.log import lg
from mininet.util import irange
+from mininet.link import TCLink
+from functools import partial
import sys
flush = sys.stdout.flush
@@ -67,15 +69,23 @@ def linearBandwidthTest( lengths ):
switchCount = max( lengths )
hostCount = switchCount + 1
- switches = { 'Open vSwitch kernel': OVSKernelSwitch }
+ switches = { 'reference user': UserSwitch,
+ 'Open vSwitch kernel': OVSKernelSwitch }
topo = LinearTestTopo( hostCount )
for datapath in switches.keys():
+ # we can remove this later when/if the userswitch is fixed
+ if switches[ datapath ] is UserSwitch:
+ print "*** Skipping User Switch due to poor performance"
+ continue
print "*** testing", datapath, "datapath"
Switch = switches[ datapath ]
results[ datapath ] = []
- net = Mininet( topo=topo, switch=Switch, controller=Controller, waitConnected=True )
+ link = partial( TCLink, delay='1ms' )
+ net = Mininet( topo=topo, switch=Switch,
+ controller=Controller, waitConnected=True,
+ link=link )
net.start()
print "*** testing basic connectivity"
for n in lengths:
--
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