iperf v3.8.1 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.
- Notable user-visible changes
- Profiled libraries and binaries are no longer built by default (#950).
- A minimal Dockerfile has been added (#824).
- A bug with burst mode and unlimited rate has been fixed (#898).
- Configuring with the –enable-static-bin flag will now cause a statically-linked iperf3 binary to be built (#989).
- Configuring with the –without-sctp flag will now prevent SCTP from being auto-detected (#1008). This flag allows building a static binary (see above item) on a CentOS system with SCTP installed, because no static SCTP libraries are available.
- Clock skew between the iperf3 client and server will no longer skew the computation of jitter during UDP tests (#842 / #990).
- A possible buffer overflow in the authentication feature has been fixed. This was only relevant when configuration authentication using the libiperf3 API, and did not affect command-line usage. Various other improvements and fixes in this area were also made (#996).
- Notable developer-visible changes
- The embedded version of cJSON has been updated to 1.3.17 (#978).
- Some server authentication functions have been added to the API (#911).
- API access has been added to the connection timeout parameter (#1001).
- Tests for some authentication functions have been added.
- Various compiler errors and warnings have been fixed.
git clone https://github.com/esnet/iperf.git
./configure; make; make install
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)