This is the Windows app named IPerf2 whose latest release can be downloaded as iperf-2.1.7-win.exe. It can be run online in the free hosting provider OnWorks for workstations.
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A network traffic tool for measuring TCP and UDP performance with metrics around both throughput and latency. The goals include maintaining an active iperf code base across a broad set of platforms and operating systems. This is a multi-threaded design which scales with the number of CPUs or cores within a system.
About iperf 2 and iperf3: Read about the differences between these programs at https://iperf2.sourceforge.io/IperfCompare.html
Man page: https://iperf2.sourceforge.io/iperf-manpage.html
- TOO MANY TO LIST SEE THE RELEASE NOTES OR THE MAN PAGE!!
- Fix portability, compile and tested with Linux, Win10, Win7, WinXP, MacOS, Android and some set-top box OSs.
- Require -u for UDP (-b no longer defaults to UDP)
- Improved performance
- Enhanced reporting with -e
- Support smaller report intervals (100 us or greater, configure --enable-fastsampling for high precision interval time output)
- Support SO_RCVTIMEOUT for server reports regardless of no packets
- Support SO_SNDTIMEO on send so socket write won't block beyond -t or -i
- Support SO_TIMESTAMP for kernel level packet timestamping
- Support end/end latency in mean/min/max/stdev format (UDP) (-e required) (assumes client and server clocks synched, e.g by Precision Time Protocol to an OCXO oscillator per Spectracom)
- Fixes to bind so OS can auto assign source port
- Add local port to bind support (-B option) using colon as separator (v4) or brackets (v6) e.g. iperf -c 192.168.100.100 -B 192.168.100.10:6001 (v4) or for v6, iperf -V -c 2001:e30:1401:2:d46e:b891:3082:b939 -B [2001:e30:1401:2:d46e:b891:3082:b940]:6001
- Support TCP rate limited streams (via the -b) using simplified token bucket
- Support packets per second (UDP) via pps as units, (e.g. -b 1000pps)
- Display PPS in both client and server reports (UDP) (-e required)
- Support realtime scheduler as a command line option (--realtime or -z, assumes proper user privileges)
- Improve client tx code path so actual tx offered rate will converge to the -b value
- Improve accuracy of microsecond delay calls (in platform independent manner) (Use of Kalman filter to predict delay errors and adjust delays per predicted error)
- Display target loop time in initial client header (UDP)
- Fix final latency report sent from server to client (UDP)
- Include standard deviation in latency output
- Suppress unrealistic latency output using (-/-/-/-)
- Use clock_gettime() in critical sections, if available, replacing gettimeofday() calls
- TCP write and error counts (TCP retries and CWND for linux) (-e required)
- TCP read count, TCP read histogram (8 bins) (-e required)
- TCP RTT and CWND values in client reports (-e required, Linux only, RTT units microseconds)
- Added support for -t on the Server (Listener) so servers/listener can be set to timeout and exit
- Add ipv6 link local support (e.g. iperf -c fe80::d03a:d127:75d2:4112%eno1)
- Default ipv6 UDP payload to 1450 bytes per one ethernet frame per payload
- -V on server will accept both IPv4 and IPv6 traffic flows
- Isochronous traffic support (via --isochronous) and frame bursts with variable bit rate (vbr) traffic and frame ids
- Multicast SSM support for both v4 and v6 using -H or -ssm-host, e.g. iperf -s -B ff1e::1 -u -V -H fc00::4
- Latency histograms for both packets and frames (e.g. --udp-histogram=10u,200000, 0.03, 99.97)
- Ethernet frame length checks with --l2checks on the client (UDP only and requires systems that support AF_PACKET)
- Server (read) -b support for TCP (via token bucket)
- UDP write counters and write error counters (requires -e)
- Python asyncio code to manage multiple iperf sessions (found in the flows directory)
- Support for timed transmit starts per --txstart-time <unix.epoch time>
- Support for client incrementing the destination ip with -P via --incr-dstip
- Support for varying the offered load using a log normal distribution around a mean and standard deviation (per -b <mean>,<stdev>),
- Honor -T (ttl) for both unicast and multicast
- Added network power to TCP client and UDP server enhanced output (netpower = throughput / RTT or throughput / end2end delay on server)
- Add TCP connect time to connected to message
- Add support for SO_MAX_PACING_RATE socket option using --fq-rate <value>
- Add configure support for --enable-fastsampling, allowing 100 microsecond report intervals
- Add support for --trip-time on client, requires -e on both client and server and synchronized clocks
- UDP uses 64 bit sequence numbers (though still interoperates with 2.0.5 which uses 32b seq no.)
This is an application that can also be fetched from https://sourceforge.net/projects/iperf2/. It has been hosted in OnWorks in order to be run online in an easiest way from one of our free Operative Systems.