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iperf is a tool for active measurements of the maximum achievable bandwidth on IP networks. It supports tuning of various parameters related to timing, protocols, and buffers. For each test it reports the bandwidth, 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 incorporates 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.
Publication Date:
OSTI Identifier:
Report Number(s):
IPERF; 003510WKSTN00
R&D Project: KJ0504000; 2014-152
DOE Contract Number:
Software Revision:
Software Package Number:
Software Package Contents:
Open Source Software package available from Lawrence Berkeley National Laboratory at the following URL:
Software CPU:
Open Source:
Source Code Available:
Research Org:
Lawrence Berkeley National Laboratory
Sponsoring Org:
United States Department of Energy
Contributing Orgs:
Bruce Mah, Jon Dugan, Brian Tierney, Jef Poskanzer, Seth Elliot
Country of Publication:
United States

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