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Made this due to iperf not being available for IBM i and the need to do some measurement of network throughput. Makes it possible to measure network throughput between two IBM i hosts (on same or different frames) or to/from Linux, AIX, Windows or any other platform that runs Java. To get best speed you need to use TCP and large packet sizes. The iperf tool defaults to 128K for TCP and 8K for UDP.
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README.md

jnetperf

Small utility to measure (single threaded) network performance between two hosts.

Requirements

You need Java (JRE) version 8 or later to run jnetperf.

Usage Instructions

  • Install the jnetperf package (.deb, .rpm or .jar) from downloads or compile from source.
  • Run /opt/jnetperf/bin/jperf, if installed from package, or as java -jar /path/to/jnetperf.jar
Usage: jnetperf [-hV] [-l=SIZE] [-n=NUM] [-p=PORT] (-c=SERVER | -s)
For more information visit https://git.data.coop/nellemann/jnetperf
  -c, --connect=SERVER   Connect to remote server.
  -h, --help             Show this help message and exit.
  -l, --pkt-len=SIZE     Datagram size in bytes, max 65507 [default: 65507].
  -n, --pkt-num=NUM      Number of packets to send [default: 150000].
  -p, --port=PORT        Network port [default: 4445].
  -s, --server           Run server and wait for client.
  -V, --version          Print version information and exit.

Examples

On host A run jnetperf as a server waiting for a connection from a client:

java -jar jnetperf-x.y.z-all.jar -s

On host B run jnetperf as a client connecting to the server and sending data:

java -jar jnetperf-x.y.z-all.jar -c server-ip

Development Information

You need Java (JDK) version 8 or later to build jnetperf.

Build & Test

Use the gradle build tool, which will download all required dependencies:

./gradlew clean build