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Questions tagged [iperf]

Iperf is a network testing tool for performance and tuning that can create TCP and UDP data streams and measure the throughput of a network that is carrying them.

Iperf is a network testing tool for performance and tuning that can create TCP and UDP data streams and measure the throughput of a network that is carrying them.

184 questions
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Using paramiko to check if an SSH can be done

I am trying to do a an automated Ethernet bandwidth test on all the ports of a router. My set up involves connecting from a Windows PC with 1 connection to a router to a Linux PC with 7 connections. I'm using the Paramiko module to SSH into the the…
Sailboarder79
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iperf TCP much faster than UDP, why?

I am wondering why iperf shows much better performance in TCP than UDP. This question is very similar to this one. UDP should be much faster than TCP because there are no acknowledge and congestion detection. I am looking for an explanation. UDP…
nowox
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Use Iperf version 2 in ios

My app requirment is to measure the throuput so want to use iperf 2 in that which is the requirment, but it is not available for objective c. so is it possible use this iperf2 library into my app to measure the tput? if yes then any lead will be…
Avinash Tag
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python popen stdout freezing

I have read through many questions touching live stdout print including the answer from J.F. Sebastian's Python 3 solution to read the stdout. However, while his solution works in this scenario: with Popen(['ping'] + ['169.254.79.191'] + ['-c'] +…
HAL
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IPerf3 execution from Android 7 doesn't work

I creating an Android application that allow to execute some iperf commands. To do that, I got the version 3 of the source code of the IPerf C project and I cross-compile it using those commands : > make clean > ./configure --host=arm-linux…
Red
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iperf3 results in packets per second?

Can iperf3 report measurements also in terms of packets per second, when generating UDP traffic? A typical output with the verbose mode is the following: Test Complete. Summary Results: [ ID] Interval Transfer Bandwidth Jitter …
Ricky Robinson
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Missing UDP packets between docker containers

I'm developing a project where I need to exchange UDP packets between 2 docker containers on the same host. The host is a new dedicated server running ubuntu server 14.04LTS (Dell PowerEdge R410, 32 GB RAM, Intel Xeon CPU E5640 @ 2.67GHz). While…
Miguel Cunha
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difference between iperf tool and Ixchariot

I want to know what is the difference between iperf tool and Ixchariot tool. Both are used for performance testing. I want to know difference and features of both tools. Thanks, Devanathan.D
WIFIuserr
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What is offered load in computer networks?

What does 'offered load' mean in computer networks? I've seen this term being defined as 'the amount of data that all network nodes have to offer', but I'm not sure if I understood it well. Which kind of nodes are we talking about (hosts, switches…
networkcoder
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android Use Linux tools stored at assets folder

I want to use tools from Linux which not available in Android by default such as iw and iperf. I saw Android applications that use this tools (like this). There are two ways to do it. First: get root rights on device and put file of the tool to the…
Dropper
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iperf Server and Client Differences

Forgive me if this is the wrong place - this is my first post. I've set up a network in Mininet - created two nodes with the same bandwidth and delay (Bandwidth: 10Mbps, Delay: 10ms). When using iperf to test this, I perform the following…
Ben Freke
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Bash script average of iperf result

I'm running iperf multiple times via the following command iperf -c 1.1.1.1 -t 60 -w 6400 -f m >> iperf.log sometimes with different arguments. The resulting iperf.log may look like this: [ 3] local 2.2.2.2 port 51129 connected with 1.1.1.1 port…
Lurch
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Iperf3 - Put hour/minutes/seconds at the beginning of each line

I'm currently trying to launch a very long Iperf test on my infrastructure, so I'm developing some powershell script in order to do the tests. To analyses the results, I want to have the hour/minutes/seconds of each new packet sends per lines on my…
Pieo
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Is it possible to check users bandwidth in frontend using iperf

I have frontend in js where you can type in iperf command and then POST it to backend in java. Then use Runtime.getRuntime().exec() to check users bandwidth, is it even possible or it's just not how iperf works. My guessing is it is only possible to…
Grimalkin
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Why does Runtime.getRuntime().exec() emit the exception as No such file or directory

I've built iperf after downloading it. And then, I pushed iperf executable file built at Android project as like app/src/main/jniLibs (including arm64-v8a, armeabi-v7a, x86, and x86_64). I've tried to rename that executable file as like…
Dennis
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