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#! @PYTHON@
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
ovs test utility that allows to do tests between remote hosts
"""
import twisted
import xmlrpclib
import time
import socket
import math
from ovstest import args, rpcserver
def bandwidth_to_string(bwidth):
"""Convert bandwidth from long to string and add units"""
bwidth = bwidth * 8 # Convert back to bits/second
if bwidth >= 10000000:
return str(int(bwidth / 1000000)) + "Mbps"
elif bwidth > 10000:
return str(int(bwidth / 1000)) + "Kbps"
else:
return str(int(bwidth)) + "bps"
def collect_information(node):
"""Print information about hosts that will do testing"""
print "Node %s:%u " % (node[0], node[1])
server1 = xmlrpclib.Server("http://%s:%u/" % (node[0], node[1]))
interface_name = server1.get_interface(node[2])
uname = server1.uname()
mtu = 1500
if interface_name == "":
print ("Could not find interface that has %s IP address."
"Make sure that you specified correct Test IP." % (node[2]))
else:
mtu = server1.get_interface_mtu(interface_name)
driver = server1.get_driver(interface_name)
print "Will be using %s(%s) with MTU %u" % (interface_name, node[2],
mtu)
if driver == "":
print "Install ethtool on this host to get NIC driver information"
else:
print "On this host %s has %s." % (interface_name, driver)
if uname == "":
print "Unable to retrieve kernel information. Is this Linux?"
else:
print "Running kernel %s." % uname
print "\n"
return mtu
def do_udp_tests(receiver, sender, tbwidth, duration, sender_mtu):
"""Schedule UDP tests between receiver and sender"""
server1 = xmlrpclib.Server("http://%s:%u/" % (receiver[0], receiver[1]))
server2 = xmlrpclib.Server("http://%s:%u/" % (sender[0], sender[1]))
udpformat = '{0:>15} {1:>15} {2:>15} {3:>15} {4:>15}'
print ("UDP test from %s:%u to %s:%u with target bandwidth %s" %
(sender[0], sender[1], receiver[0], receiver[1],
bandwidth_to_string(tbwidth)))
print udpformat.format("Datagram Size", "Snt Datagrams", "Rcv Datagrams",
"Datagram Loss", "Bandwidth")
for size in [8, sender_mtu - 100, sender_mtu - 28, sender_mtu]:
listen_handle = -1
send_handle = -1
try:
packetcnt = (tbwidth * duration) / size
listen_handle = server1.create_udp_listener(receiver[3])
if listen_handle == -1:
print ("Server could not open UDP listening socket on port"
" %u. Try to restart the server.\n" % receiver[3])
return
send_handle = server2.create_udp_sender(
(receiver[2], receiver[3]),
packetcnt, size, duration)
#Using sleep here because there is no other synchronization source
#that would notify us when all sent packets were received
time.sleep(duration + 1)
rcv_packets = server1.get_udp_listener_results(listen_handle)
snt_packets = server2.get_udp_sender_results(send_handle)
loss = math.ceil(((snt_packets - rcv_packets) * 10000.0) /
snt_packets) / 100
bwidth = (rcv_packets * size) / duration
print udpformat.format(size, snt_packets, rcv_packets,
'%.2f%%' % loss, bandwidth_to_string(bwidth))
finally:
if listen_handle != -1:
server1.close_udp_listener(listen_handle)
if send_handle != -1:
server2.close_udp_sender(send_handle)
print "\n"
def do_tcp_tests(receiver, sender, duration):
"""Schedule TCP tests between receiver and sender"""
server1 = xmlrpclib.Server("http://%s:%u/" % (receiver[0], receiver[1]))
server2 = xmlrpclib.Server("http://%s:%u/" % (sender[0], sender[1]))
tcpformat = '{0:>15} {1:>15} {2:>15}'
print "TCP test from %s:%u to %s:%u (full speed)" % (sender[0], sender[1],
receiver[0], receiver[1])
print tcpformat.format("Snt Bytes", "Rcv Bytes", "Bandwidth")
listen_handle = -1
send_handle = -1
try:
listen_handle = server1.create_tcp_listener(receiver[3])
if listen_handle == -1:
print ("Server was unable to open TCP listening socket on port"
" %u. Try to restart the server.\n" % receiver[3])
return
send_handle = server2.create_tcp_sender(receiver[2], receiver[3],
duration)
time.sleep(duration + 1)
rcv_bytes = long(server1.get_tcp_listener_results(listen_handle))
snt_bytes = long(server2.get_tcp_sender_results(send_handle))
bwidth = rcv_bytes / duration
print tcpformat.format(snt_bytes, rcv_bytes,
bandwidth_to_string(bwidth))
finally:
if listen_handle != -1:
server1.close_tcp_listener(listen_handle)
if send_handle != -1:
server2.close_tcp_sender(send_handle)
print "\n"
if __name__ == '__main__':
try:
ovs_args = args.ovs_initialize_args()
if ovs_args.port is not None: # Start in server mode
print "Starting RPC server"
try:
rpcserver.start_rpc_server(ovs_args.port)
except twisted.internet.error.CannotListenError:
print "Couldn't start XMLRPC server on port %u" % ovs_args.port
elif ovs_args.servers is not None: # Run in client mode
node1 = ovs_args.servers[0]
node2 = ovs_args.servers[1]
bandwidth = ovs_args.targetBandwidth
mtu_node1 = collect_information(node1)
mtu_node2 = collect_information(node2)
do_udp_tests(node1, node2, bandwidth, 5, mtu_node1)
do_udp_tests(node2, node1, bandwidth, 5, mtu_node2)
do_tcp_tests(node1, node2, 5)
do_tcp_tests(node2, node1, 5)
except KeyboardInterrupt:
pass
except socket.error:
print "Couldn't establish XMLRPC control channel"
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