Repository navigation
Expand file tree
/
Copy pathlimit.py
More file actions
executable file
·60 lines (53 loc) · 1.99 KB
/
Copy pathlimit.py
File metadata and controls
executable file
·60 lines (53 loc) · 1.99 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
7984
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
#!/usr/bin/python
"""
limit.py: example of using link and CPU limits
"""
from mininet.net import Mininet
from mininet.link import TCIntf
from mininet.node import CPULimitedHost
from mininet.topolib import TreeTopo
from mininet.util import custom, quietRun
from mininet.log import setLogLevel, info
def testLinkLimit( net, bw ):
"Run bandwidth limit test"
info( '*** Testing network %.2f Mbps bandwidth limit\n' % bw )
net.iperf()
def limit( bw=10, cpu=.1 ):
"""Example/test of link and CPU bandwidth limits
bw: interface bandwidth limit in Mbps
cpu: cpu limit as fraction of overall CPU time"""
intf = custom( TCIntf, bw=bw )
myTopo = TreeTopo( depth=1, fanout=2 )
for sched in 'rt', 'cfs':
info( '*** Testing with', sched, 'bandwidth limiting\n' )
if sched == 'rt':
release = quietRun( 'uname -r' ).strip('\r\n')
output = quietRun( 'grep CONFIG_RT_GROUP_SCHED /boot/config-%s'
% release )
if output == '# CONFIG_RT_GROUP_SCHED is not set\n':
info( '*** RT Scheduler is not enabled in your kernel. '
'Skipping this test\n' )
continue
host = custom( CPULimitedHost, sched=sched, cpu=cpu )
net = Mininet( topo=myTopo, intf=intf, host=host )
net.start()
testLinkLimit( net, bw=bw )
net.runCpuLimitTest( cpu=cpu )
net.stop()
def verySimpleLimit( bw=150 ):
"Absurdly simple limiting test"
intf = custom( TCIntf, bw=bw )
net = Mininet( intf=intf )
h1, h2 = net.addHost( 'h1' ), net.addHost( 'h2' )
net.addLink( h1, h2 )
net.start()
net.pingAll()
net.iperf()
h1.cmdPrint( 'tc -s qdisc ls dev', h1.defaultIntf() )
h2.cmdPrint( 'tc -d class show dev', h2.defaultIntf() )
h1.cmdPrint( 'tc -s qdisc ls dev', h1.defaultIntf() )
h2.cmdPrint( 'tc -d class show dev', h2.defaultIntf() )
net.stop()
if __name__ == '__main__':
setLogLevel( 'info' )
limit()