def testAuto(num_sw=16, num_port=48, num_group=4, num_tries=10000, control_threshold=0.9):
"""Run an automatic test with given parameters.
Generate group randomly, and send traffic randomly with control_threshold
@param num_sw: Number of switches in the datacenter
@param num_port: Number of ports of each switch
@param num_group: Number of groups in the datacenter
@param num_tries: Number of random tests
@param control_threshold: How many percent flows are cross-group
"""
dc = DC(Flat(num_sw=num_sw, num_port=num_port))
dc.genGroupRandom(num_group=num_group)
dc.testShuffleTraffic(num_tries, control_threshold)
dc.showInfo()
dc.showStat()
