lantz
b7c412073a
Ubuntu 20.04 fixes:
- fixes sshd test
- speeds up examples/{treeping64,tree1024}.py
- debugging hacks/output for testLinkChange
- removes cfs from examples/popen.py
- improves nat in nodelib (netplan fixes?)
- makes some tests executable
- waits for switches to connect in tests to
avoid race conditions
-- adds mn -w option and wait CLI command
Changes:
- REMOVES default "-v" argument for Controller()
and adds verbose(=False) option; avoiding logging
makes it faster
- CHANGES waitConnected to wait for 5 seconds
as documented; we may wish to implement an argument
to -w to set this timeout
Issues?
- There may still be an issue with the ovs-netplan-clean
service causing the boot to hang ;-(
61 lines
2.0 KiB
Python
Executable File
61 lines
2.0 KiB
Python
Executable File
#!/usr/bin/python
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"""
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limit.py: example of using link and CPU limits
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"""
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from mininet.net import Mininet
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from mininet.link import TCIntf
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from mininet.node import CPULimitedHost
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from mininet.topolib import TreeTopo
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from mininet.util import custom, quietRun
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from mininet.log import setLogLevel, info
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def testLinkLimit( net, bw ):
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"Run bandwidth limit test"
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info( '*** Testing network %.2f Mbps bandwidth limit\n' % bw )
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net.iperf()
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def limit( bw=10, cpu=.1 ):
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"""Example/test of link and CPU bandwidth limits
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bw: interface bandwidth limit in Mbps
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cpu: cpu limit as fraction of overall CPU time"""
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intf = custom( TCIntf, bw=bw )
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myTopo = TreeTopo( depth=1, fanout=2 )
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for sched in 'rt', 'cfs':
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info( '*** Testing with', sched, 'bandwidth limiting\n' )
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if sched == 'rt':
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release = quietRun( 'uname -r' ).strip('\r\n')
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output = quietRun( 'grep CONFIG_RT_GROUP_SCHED /boot/config-%s'
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% release )
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if output == '# CONFIG_RT_GROUP_SCHED is not set\n':
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info( '*** RT Scheduler is not enabled in your kernel. '
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'Skipping this test\n' )
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continue
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host = custom( CPULimitedHost, sched=sched, cpu=cpu )
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net = Mininet( topo=myTopo, intf=intf, host=host, waitConnected=True )
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net.start()
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testLinkLimit( net, bw=bw )
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net.runCpuLimitTest( cpu=cpu )
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net.stop()
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def verySimpleLimit( bw=150 ):
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"Absurdly simple limiting test"
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intf = custom( TCIntf, bw=bw )
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net = Mininet( intf=intf, waitConnected=True )
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h1, h2 = net.addHost( 'h1' ), net.addHost( 'h2' )
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net.addLink( h1, h2 )
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net.start()
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net.pingAll()
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net.iperf()
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h1.cmdPrint( 'tc -s qdisc ls dev', h1.defaultIntf() )
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h2.cmdPrint( 'tc -d class show dev', h2.defaultIntf() )
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h1.cmdPrint( 'tc -s qdisc ls dev', h1.defaultIntf() )
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h2.cmdPrint( 'tc -d class show dev', h2.defaultIntf() )
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net.stop()
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if __name__ == '__main__':
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setLogLevel( 'info' )
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limit()
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