Yardstick Test Case Description TC002ΒΆ

Network Latency
metric RTT, Round Trip Time
test purpose To do a basic verification that network latency is within acceptable boundaries when packets travel between hosts located on same or different compute blades. The purpose is also to be able to spot trends. Test results, graphs and similar shall be stored for comparison reasons and product evolution understanding between different OPNFV versions and/or configurations.

file: opnfv_yardstick_tc002.yaml

Packet size 100 bytes. Total test duration 600 seconds. One ping each 10 seconds. SLA RTT is set to maximum 10 ms.

test tool


Ping is normally part of any Linux distribution, hence it doesn’t need to be installed. It is also part of the Yardstick Docker image. (For example also a Cirros image can be downloaded from cirros-image, it includes ping)


Ping man page


applicability Test case can be configured with different packet sizes, burst sizes, ping intervals and test duration. SLA is optional. The SLA in this test case serves as an example. Considerably lower RTT is expected, and also normal to achieve in balanced L2 environments. However, to cover most configurations, both bare metal and fully virtualized ones, this value should be possible to achieve and acceptable for black box testing. Many real time applications start to suffer badly if the RTT time is higher than this. Some may suffer bad also close to this RTT, while others may not suffer at all. It is a compromise that may have to be tuned for different configuration purposes.
pre-test conditions

The test case image needs to be installed into Glance with ping included in it.

No POD specific requirements have been identified.

test sequence description and expected result
step 1

The hosts are installed, as server and client. Ping is invoked and logs are produced and stored.

Result: Logs are stored.

test verdict Test should not PASS if any RTT is above the optional SLA value, or if there is a test case execution problem.