iperf v3.7 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
- Support for simultaneous bidirectional tests with the –bidir flag (#201/#780).
- Use POSIX standard clock_gettime(3) interface for timekeeping where available (#253/#738).
- Passwords for authentication can be provided via environment variable (#815).
- Specifying –repeating-payload and –reverse now works (#867).
- Failed authentication doesn’t count for –one-off (#864/#877).
- Several memory leaks related to authenticated use were fixed (#881/#888).
- The delay for tearing down the control connection for the default timed tests has been increased, to more gracefully handle high-delay paths (#751/#859).
- Notable developer-visible changes
- Various improvements to the libiperf APIs (#767, #775, #869, #870, #871)
- Fixed build behavior when OpenSSL is absent (#854).
- Portability fixes (#821/#874).
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)