iperf v3.15 releases: TCP, UDP, and SCTP network bandwidth measurement tool

iperf3: A TCP, UDP, and SCTP network bandwidth measurement tool

iperf is a tool for active measurements of the maximum achievable bandwidth on IP networks. It supports the tuning of various parameters related to timing, protocols, and buffers. For each test, it reports the measured throughput/bitrate, loss, and other parameters.

This version sometimes referred to as iperf3, is a redesign of an original version developed at NLANR/DAST. iperf3 is a new implementation from scratch, with the goal of a smaller, simpler code base, and a library version of the functionality that can be used in other programs. iperf3 also has a number of features found in other tools such as nuttcp and netperf but were missing from the original iperf. These include, for example, a zero-copy mode and optional JSON output. Note that iperf3 is not backwards compatible with the original iperf.

Primary development for iperf3 takes place on CentOS Linux, FreeBSD, and macOS. At this time, these are the only officially supported platforms, however, there have been some reports of success with OpenBSD, NetBSD, Android, Solaris, and other Linux distributions.

iperf3 is principally developed by ESnet / Lawrence Berkeley National Laboratory. It is released under a three-clause BSD license.

Changelog v3.15

• Notable user-visible changes
  • Several bugs that could allow the iperf3 server to hang waiting
    for input on the control connection has been fixed. ESnet thanks
    Jorge Sancho Larraz from Canonical for reporting this issue. For
    more information, see:
    https://downloads.es.net/pub/iperf/esnet-secadv-2023-0002.txt.asc
  • A bug that caused garbled output with UDP tests on 32-bit hosts
    has been fixed (PR #1554, PR #1556). This bug was introduced in
    iperf-3.14.
  • A bug in counting UDP messages has been fixed (PR #1367, PR
    #1380).

Install

git clone https://github.com/esnet/iperf.git

./configure; make; make install

Use

Copyright (c) 2014-2018 The Regents of the University of California, through Lawrence Berkeley National Laboratory (subject to receipt of any required approvals from the U.S. Dept. of Energy)