1 # Copyright (c) 2016 Cisco and/or its affiliates.
2 # Licensed under the Apache License, Version 2.0 (the "License");
3 # you may not use this file except in compliance with the License.
4 # You may obtain a copy of the License at:
6 # http://www.apache.org/licenses/LICENSE-2.0
8 # Unless required by applicable law or agreed to in writing, software
9 # distributed under the License is distributed on an "AS IS" BASIS,
10 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11 # See the License for the specific language governing permissions and
12 # limitations under the License.
14 """Performance testing traffic generator library."""
16 from robot.api import logger
18 from resources.libraries.python.ssh import SSH
19 from resources.libraries.python.topology import NodeType
20 from resources.libraries.python.topology import NodeSubTypeTG
22 __all__ = ['TrafficGenerator']
24 class TrafficGenerator(object):
25 """Traffic Generator"""
34 def initialize_traffic_generator(node, interface1, interface2):
36 :param node: Traffic generator node
37 :param interface1: PCI address of first interface
38 :param interface2: PCI address of second interface
45 trex_path = "/opt/trex-core-1.91"
47 if node['type'] != NodeType.TG:
48 raise Exception('Node type is not a TG')
49 if node['subtype'] == NodeSubTypeTG.TREX:
53 (ret, stdout, stderr) = ssh.exec_command(
54 "sh -c 'cd {0}/scripts/ && "
58 (ret, stdout, stderr) = ssh.exec_command(
59 "sh -c 'cd {0}/scripts/ && "
60 "sudo nohup ./t-rex-64 -i -c 4 --iom 0 > /dev/null 2>&1 &'"
65 def teardown_traffic_generator(node):
67 :param node: Traffic generator node
72 if node['type'] != NodeType.TG:
73 raise Exception('Node type is not a TG')
74 if node['subtype'] == NodeSubTypeTG.TREX:
77 (ret, stdout, stderr) = ssh.exec_command(
78 "sh -c 'sudo pkill t-rex'")
80 def send_traffic_on(self, nodes_info, duration, rate,
81 framesize, traffic_type):
82 """Send traffic from all configured interfaces on TG
83 :param nodes_info: Dictionary containing information on all nodes
85 :param duration: Duration of test traffic generation in seconds
86 :param rate: Offered load per interface (e.g. 1%, 3gbps, 4mpps, ...)
87 :param framesize: Frame size (L2) in Bytes
88 :param traffic_type: Traffic profile
89 :type nodes_info: dict
93 :type traffic_type: str
98 node = nodes_info["TG"]
100 if node['type'] != NodeType.TG:
101 raise Exception('Node type is not a TG')
103 if node['subtype'] is None:
104 raise Exception('TG subtype not defined')
109 if node['subtype'] == NodeSubTypeTG.TREX:
110 if traffic_type in ["3-node-xconnect", "3-node-bridge"]:
111 (ret, stdout, stderr) = ssh.exec_command(
112 "sh -c '/tmp/openvpp-testing/resources/tools/t-rex-stateless.py "
113 "-d {0} -r {1} -s {2} "
114 "--p1_src_start_ip 10.10.10.1 "
115 "--p1_src_end_ip 10.10.10.254 "
116 "--p1_dst_start_ip 20.20.20.1 "
117 "--p2_src_start_ip 20.20.20.1 "
118 "--p2_src_end_ip 20.20.20.254 "
119 "--p2_dst_start_ip 10.10.10.1'".\
120 format(duration, rate, framesize), timeout=int(duration)+60)
121 elif traffic_type in ["3-node-IPv4"]:
122 (ret, stdout, stderr) = ssh.exec_command(
123 "sh -c '/tmp/openvpp-testing/resources/tools/t-rex-stateless.py "
124 "-d {0} -r {1} -s {2} "
125 "--p1_src_start_ip 10.10.10.2 "
126 "--p1_src_end_ip 10.10.10.254 "
127 "--p1_dst_start_ip 20.20.20.2 "
128 "--p2_src_start_ip 20.20.20.2 "
129 "--p2_src_end_ip 20.20.20.254 "
130 "--p2_dst_start_ip 10.10.10.2'".\
131 format(duration, rate, framesize),\
132 timeout=int(duration)+60)
134 raise NotImplementedError('Unsupported traffic type')
137 raise NotImplementedError("TG subtype not supported")
143 for line in stdout.splitlines():
147 logger.info('TrafficGen result: {0}'.format(self._result))
149 self._loss = self._result.split(', ')[3].split('=')[1]
153 def no_traffic_loss_occured(self):
154 """Fail is loss occured in traffic run
158 if self._loss is None:
159 raise Exception('The traffic generation has not been issued')
160 if self._loss != '0':
161 raise Exception('Traffic loss occured: {0}'.format(self._loss))