Yardstick Test Case Description TC011ΒΆ

Packet delay variation between VMs
test case id OPNFV_YARDSTICK_TC011_Packet delay variation between VMs
metric jitter: packet delay variation (ms)
test purpose Measure the packet delay variation sending the packets from one VM to the other.

File: opnfv_yardstick_tc011.yaml

  • options: protocol: udp # The protocol used by iperf3 tools bandwidth: 20m # It will send the given number of packets

    without pausing

  • runner: duration: 30 # Total test duration 30 seconds.

  • SLA (optional): jitter: 10 (ms) # The maximum amount of jitter that is


test tool


iPerf3 is a tool for active measurements of the maximum achievable bandwidth on IP networks. It supports tuning of various parameters related to timing, buffers and protocols. The UDP protocols can be used to measure jitter delay.

(iperf3 is not always part of a Linux distribution, hence it needs to be installed. It is part of the Yardstick Docker image. As an example see the /yardstick/tools/ directory for how to generate a Linux image with pktgen included.)





Test can be configured with different

  • bandwidth: Test case can be configured with different


  • duration: The test duration can be configured

  • jitter: SLA is optional. The SLA in this test case

    serves as an example.

pre-test conditions

The test case image needs to be installed into Glance with iperf3 included in the image.

No POD specific requirements have been identified.

test sequence description and expected result
step 1

The hosts are installed, as server and client. iperf3 is invoked and logs are produced and stored.

Result: Logs are stored.

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