Bob Lantz
b2e1907c3a
With a 1 ms delay, the performance tests periodically fails under nested virtualization, which is how we are testing it. Increasing the delay should make the effect (lower TCP data rates as latency increases, due to TCP's congestion control algorithm) more pronounced and robust.
50 lines
1.6 KiB
Python
Executable File
50 lines
1.6 KiB
Python
Executable File
#!/usr/bin/env python
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"""
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Test for linearbandwidth.py
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"""
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import unittest
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import pexpect
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import sys
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class testLinearBandwidth( unittest.TestCase ):
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@unittest.skipIf( '-quick' in sys.argv, 'long test' )
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def testLinearBandwidth( self ):
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"Verify that bandwidth is monotonically decreasing as # of hops increases"
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p = pexpect.spawn( 'python -m mininet.examples.linearbandwidth' )
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count = 0
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opts = [ '\*\*\* Linear network results',
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'(\d+)\s+([\d\.]+) (.bits)',
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pexpect.EOF ]
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while True:
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index = p.expect( opts, timeout=600 )
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if index == 0:
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count += 1
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elif index == 1:
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n = int( p.match.group( 1 ) )
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bw = float( p.match.group( 2 ) )
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unit = p.match.group( 3 )
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if unit[ 0 ] == 'K':
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bw *= 10 ** 3
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elif unit[ 0 ] == 'M':
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bw *= 10 ** 6
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elif unit[ 0 ] == 'G':
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bw *= 10 ** 9
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# check that we have a previous result to compare to
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if n != 1:
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info = ( 'bw: %.2e bits/s across %d switches, '
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'previous: %.2e bits/s across %d switches' %
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( bw, n, previous_bw, previous_n ) )
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self.assertTrue( bw < previous_bw, info )
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previous_bw, previous_n = bw, n
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else:
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break
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# verify that we received results from at least one switch
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self.assertTrue( count > 0 )
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if __name__ == '__main__':
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unittest.main()
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