iPerf3 3.22 Network Bandwidth Measurement Tool

New version: iPerf3 3.22 by ar51an - the download link below points directly to the developer.

iPerf3 is a specialized utility for actively measuring maximum achievable bandwidth on IP networks. Supporting TCP, UDP, and SCTP protocols, it is an essential tool for network engineers, system administrators, and developers assessing network performance. Users can tune parameters related to timing, protocols, and buffers to simulate specific traffic conditions. For each test, iPerf3 reports detailed metrics including throughput, bitrate, and packet loss, offering a comprehensive view of network health.

Key Features

• Active bandwidth measurement over TCP, UDP, and SCTP protocols.
• Reports measured throughput, bitrate, loss, and other relevant parameters.
• Allows tuning of timing, protocol, and buffer parameters for precise testing.
• Supports Global Segmentation Offload (GSO) and Global Receive Offload (GRO) on Linux.
• Provides human-readable TCP window information and additional TCP statistics in JSON output on macOS.
• Offers improved error reporting from the server to the client for better diagnostics.
• Supports the --bind-dev option on macOS systems.
• Utilizes a BSD-3-Clause license for open-source distribution.

What's New in Version 3.21

• Added support for GSO and GRO under Linux environments.
• Enabled --bind-dev option support on macOS.
• Implemented tcp_info structure support on macOS for better TCP statistics.
• Improved server error condition reporting to clients.
• Increased the maximum value for the --set-mss option to 32K.
• Changed child thread cancellation type to PTHREAD_CANCEL_DEFERRED to fix hangs.
• Fixed a race condition that caused crashes when closing sockets.
• Corrected erroneous reporting of zero UDP packet loss in lossy tests.
• Prevented division by zero errors and improved the security posture of the service file.