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I am new to dpdk-pktgen and dpdk in general. My scenario is to test throughput of openvswitch-dpdk at different rates of transmission. I am using dpdk-pktgen version 22.04.1 inside a docker container. Pktgen is using the dpdkvhostuser ports that I created for OVS. I want to change the rate I want to transmit traffic, like at 1 Mpps or 5 Gbits/s suppose. However I am unable to understand with the pktgen CLI commands available, on how to do that. If anyone knows please could you kindly give me a detailed explanation on it.

Thanks!

Rohan Bose
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  • @RahonBose, the answer to the query is shared. Please read and try the same out. If it has helped Accept and upvote to close the question too. – Vipin Varghese Aug 05 '22 at 01:05

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I always recommend pktgen document to understand how to use Pktgen CLI. As per Pktgen

  1. set <portlist> rate <percent> - Packet rate in percentage - controls the rate.
  2. set <portlist> burst <value> - number of packets in a burst - controls the numbers of packets per burst.

So for the question I want to change the rate I want to transmit traffic, like at 1 Mpps or 5 Gbits/s suppose; one needs to use set [port] rate [% of actual link speed] and set [port] burst [1-128] to control the TX packets per second.

Example: if one needs to send 1Gbps over VHOST-USER Interface, the easiest cli configuration is to use set all burst 10. now to have precise Packets one might need to use packets per burst set all burst 1.

Vipin Varghese
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