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Iperf 3.10.1 Windows build



So there has been an on going thread about powerline adapters, well the OP finally got some - and I was curious about speed he is seeing, etc.  So told him would post up links to some tools.


This lead me to compiling the latest version of iperf3 I could find for windows ;) Since I couldn't find one.  So figured post it up if anyone is interested.


Got the source from here https://github.com/esnet/iperf

Found a blog post how to compile on windows here http://www.embeddedsystemtesting.com/2014/08/how-to-compile-iperf3-for-windows.html


So few minutes later I end up with a copy of the current iperf3 that works on windows.  Needs a few cygwin dlls, included in the zip.  But other than that unzip and go.


It has lots of new options compared to the older versions


Been a fan of iperf for years, so will prob keep this current when new versions come out since doesn't seem like anyone else is posting up the windows builds, etc.

You can grab all my compiled versions here https://files.budman.pw/

Any questions on its use, just ask -- post up some tests as well!!


edit: updated this on 02/25/17 new build 3.1.6


This version of iperf3 contains two minor fixes. Notably, one of them unbreaks JSON output with UDP tests.


edit2:  5/23/17 Thanks to @Datalink for letting me know site was down.  Back up now, if your having issues flush your dns had to move it to different host.  Added site to my monitoring so next time it goes down will know right away ;)

BTW 3.1.7 just typo's so no reason to compile it

2017-03-06: iperf-3.1.7 released

This version of iperf3 contains two documentation fixes, but is otherwise identical to the prior release.


edit3: 7/6/17 Updated to new 3.2 build


CRC32: 9e4b913c
MD5: ff7fc42f6ba29e9f83c8bb8e0066f722
SHA-1: 68ad3a0f0c2f30c1756f0a5eb39e1062e6beb6f4


CRC32: add96290
MD5: 7a014ff67b1d678f546ead2360820d47
SHA-1: 98ed98ac6d392a4484e5151ab2f714390c99b52e


edi4: 11/18/17 Updated to new 3.3 build


MD5: 49095ccb2442101d2a1ffc6213f3d1b9
SHA-256: 1fea7ae97b8ec5ab1c61ef1afcf7afd491d37ef41061a845f9bb8477425c66db



MD5: b6ad4c094a18196e0798e1a2825bc609
SHA-256: 919978ac0b574d7662d5b0e58174a6107002db96e7592929a9a28938516a2c5f


edit5: 02/16/2018 Updated to new 3.4 build see post in thread


MD5: 3b805d0895e7bb4d005429ed5859dd00
SHA-256: 82a933bbf96731a615ee5ae40bc1e6986ffcdd0b83c7c4e9cd024a996b3c0808

MD5: e4c0d2d8bda22ebbb710a9a65aacddf9
SHA-256: 7a3f83d211d22102d05dcf0eb24f4ff8cd3d9083aada9a27c88ba7ced0a0eccc


edit6: 03/05/2018 Updated to 3.5 build, see post in thread


CRC32: 18962237
MD5: 840a2d5e0f81d8a6dc0d8be854caf61a
SHA-1: 1a18185c79645b082392dcd024b7e53900dc38bd
SHA-256: 94a0ec4e486904a6a8ebe390eca37871f47a097599908c3647d6ad1d0bbdff59


CRC32: 21d8a0eb
MD5: dd79fe69c86e62c780e45e6e0d2ec66d
SHA-1: 2c63c1f9ef35be23170869a6a7eb048241aa2f14
SHA-256: bf4b95a58e54ceda101e33b0b908c581df1ce4a217f233e1092dc3278572de43




CRC32: A9B23E64
MD5: 3530BD3C837EA146C8F98106FA94E395
SHA-1: 7E09239B207739714294A4EA1DA9C69623374740
SHA-256: DE958C4CF72DBC64DCBB42130BD466D9FD367E4519C5C3F78A6675CA87E12B7D


edit8: Updated 7/6/2019 New 3.7 build, see post in thread


CRC32: 13EB9AD9
MD5: 96C2C058B0128BEC346BD0D034D7B31E
SHA-1: 83978F54B7EDDA073CC4E865493AA6544862879A
SHA-256: 93FB4641810C06DE554E97FD4E6B44CEFBD8ECB8EA8CFEA3CC550B823C3E89CE


edit9: Updated 3/11/2020 updated cygwin, guess there was some bug in the cygwindll, see post in thread.


MD5: C3594A08967FD57BF36F757980480F9D
SHA-1: DF6C8B3D18941DABBC5AB21ACB5844A062620092
SHA-256: B1A14F8B2435AAA98D26F8499DF23BF6532B5F0EA2288DA04E0C28333EDBC48E


edit10: Updated 6/9/2020 New 3.8 build, see post in thread


MD5: 38A01DC0D4CC67058B094A96274A6F49
SHA-256: E37B0885EFA60106A3333CDAE878815B2306B434175F2BFBAF2DBF709BAB2049


edit11: updated 6/10/2020 New 3.8.1, see post in thread


CRC32: 69CE7B06
MD5: 1157B038DC04646B074A822A171E77A7
SHA-1: A692D6E5FAD3004A229C92661EC4448004EA269E
SHA-256: CD337C2EEB5ACF02713867990E4F9F0656CC0CAEA850F3B3C289DD79305DF1A1


edit12: updated 8/17/2020 New 3.9, see post in thread


Name: iperf3.9_64.zip
Size: 1542276 bytes (1506 KiB)
SHA256: 15D2D3C2A8B9A69EFD9991FEFE5206E31D6055399F7A4C663C3CB6D77B6770F8


edit13: updated 5/31/2021, see post in thread


SHA256: 098f276552939acec2a9a7d6990e79bac17e45fb951d32ce59c2d764cdcaf15a


edit14: updated 6/4/2021, released a new build


sha256     2cf3ff3671f9f4f57cf01ab8b2d960feb9e087d450f3b58aaf4ab82333262be0

iperf 3.10.1 fixes a problem with the configure script that made it make not work correctly in some circumstances. It is functionally identical to iperf 3.10.

I didn't seem to have any issues with my 3.10 build, but redid to keep with current version numbers.


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Sweet stuff! (y)


I'll start testing my powerline stuff too (TP Link TP6030s - same as the 6010 but with 3 x 1Gbps ports on each device). My Xbox, TV and WDTV will be connected to it so need to make sure it can handle it all! :yes:

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It would be very interesting to get some powerline adapter real world numbers sure..  The one's the OP got show 500mbps, but wireless makers say that new router is 450mbps 2.4, which will all know is a crock of sh_t!


I have noticed couple of things not working on windows with this build, the zerocopy -Z is not supported, that is kind of a given.  But the -J for json output causes a stackdump as well, so don't use those ;)


I keep meaning to grab a set to play with, but then again I run wire if needed ;) I have set them up in a few places..  But no gig, and they easy do 100mbps without any issues..

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Get the TP-Link TL4010 kit, like $30 on Newegg and gave me 10MB/s* copy speeds between my laptop and the NAS connected to a 1Gbps switch. They were also in the same room, same outlet even so not "normal" usage but just wanted to get a general idea of what they are capable of.


* - Note the 4010 one is limited to a 10/100 port so the speeds were limited there. The 6010 pushes ~40MB/s in the same setup with a link rate of 337Mbps. Didn't try to do more testing to see if it could be faster but figured that's pretty good.


I'll do some real testing on the weekend :D

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where do you see a link rate?  40MBps is best you can hope for with that rate..  Simple /8 math gives you ballpark numbers 337/8 = 42.125 ;)

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Yeah, no got that, I was expecting a full 500/600Mbps link rate however since they are right next to each other.


Doesn't matter much I guess, was just a quick test :)


The software for it shows the link rate:


Took this shot from http://www.smallnetbuilder.com/lanwan/lanwan-reviews/32454-tp-link-homeplug-head-to-head




The software is not super useful but It does allow some little tweaks ("QoS" - dunno if it actually works) along with firmware upgrades.




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Well the link rate is good info to know, so software is useful for that and firmware updates.. So looks like the link rate it reports is pretty close to the money then which is good validation with your file copy.

So does the software pick up the other device on the other end of the powerline connection or do you have to plug in on that side to see that one?

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The software on the Network tab will show you details of the other devices you have plugged in. In my case I have 4 so 3 show up on the Network tab. To see the info of the local one you have to plug into it or something connected to it which would show on the Status page. Doesn't show much info though, you can just change the Network name and view the password as seen below:




Here is the advanced tab if you were curious:




So basically I just use it to test/setup and then get rid of the software.

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Updated build

New Version is out iperf3_10 http://software.es.n...3-0-10-released, I have updated the windows build you can find it here


md5 of zip 7DF9AF051A5554DC342DE366710FFC35

using current version of cygwin dll 1.7.33

Quick test shows its working fine, anyone find any problems let me know.


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Cool! I am running on some of the very first home plugs, They work well for me at the minute but I should really upgrade to Gig ones at some point. Been meaning to for a while. I guess I am waiting for the right "deal" .... They work fine for my web browsing but transferring large files around not amazing but do the job.

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I got AV600 ones and I see around 8-12MBytes/sec transfer and they are NETGEAR

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So I just got a pair of these that someone was not using any longer, and they are the netgear AV500 model (XAV5201 - but WTF they only have a 10/100 nic -- how and the F can they get away with the 500mbps label.. I thought it was nonsense when wifi spouts out their nonsense numbers.. If you want to call them 200mbps when you have 100mbps full duplex ;) But 500 come on give me a break.

Figured could do some testing, but kind of pointless with limit of 100mbps interface.. But yeah better than wireless connection.

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So I just got a pair of these that someone was not using any longer, and they are the netgear AV500 model (XAV5201 - but WTF they only have a 10/100 nic -- how and the F can they get away with the 500mbps label.. I thought it was nonsense when wifi spouts out their nonsense numbers.. If you want to call them 200mbps when you have 100mbps full duplex ;) But 500 come on give me a break.

Figured could do some testing, but kind of pointless with limit of 100mbps interface.. But yeah better than wireless connection.

Backplane speed

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Backplane speed my ass - they come in a kit with 2 of them.. Now maybe the 1 that has 4 ports on it ;)

And even if it could do 10 freaking trillion bps doesn't matter when you have 2 of them and connecting with it 100mbps nic..

Come on companies - why not just print actual freaking numbers the users can expect!!

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Yeah I understand wanting to say your the fastest, etc.. How about actually being the fastest with actual real numbers and benchmarks, etc ;)

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yeppers and most can't even come close.. like ac1200 only gets 300Mbps or around 36-42MBytes/sec

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They add up numbers that don't reflect what can be seen by the client.. A 1750AC router for example adds the 2.4 and the 5ghz together, even though no single client can use both together.

Are you connecting at 1200 as you phy data rate reported by the client? If so 300 is bit low.. Other problem with speeds reported these days, which I can understand is the AP numbers - you have 3x3 at the AP, but then you connect with single stream client, your not going to see anywhere close to what it might do if 3x3 client.

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Updated to build 3.11


This maintenance release adds a -1 flag to make the iperf3 execute a single test and exit, needed for an upcoming bwctl release. A few other bugs are also fixed.


D:\iperf3_11>iperf3.exe -v
iperf 3.0.11


Server specific:
  -s, --server              run in server mode
  -D, --daemon              run the server as a daemon
  -1, --one-off             handle one client connection then exit


Updated first post with link to new file.. Also cygstdc++-6.dll does not seem to be needed, so removed it from the zip.


BudMan@i5-w7 /iperf-3.0.11
$ cygcheck iperf3.exe
Found: D:\cygwin\usr\local\bin\iperf3.exe

BudMan@i5-w7 /iperf-3.0.11

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Thank you for compiling iperf3 for Windows!


It's working but I had to jump through some hoops. Specificallly, it won't work if I leave iperf3.exe and the dlls in the same folder, even if I add the path to this folder to the Path environment variable. I had to move the dlls to a different folder, and add it to the Path environment variable also.


Now everything is working great, I just wanted to share in case somebody runs into the same problem.

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Yeah I understand wanting to say your the fastest, etc.. How about actually being the fastest with actual real numbers and benchmarks, etc ;)

Happy Birthday!

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Updated 01/17/15

New Version is out iperf3_10 http://software.es.net/iperf/news.html#iperf-3-0-11-released I have updated the windows build you can find it here


md5 of zip e58f2721f70f43e78a1c9ae8605dd025

using current version of cygwin dll 1.7.33

I pulled out one of the cygwin dlls - doesn't seem to be needed.



First of all grate work thank you!


Little fix to your post, if you hover over the link http://files.budman.pw/iperf3_11.zip you will see it actually redirects to version 3_10 the hyperlink needs to be fixed



Also if you run the command with the Json switch it crashes, for example:

iperf3.exe -s -J
      0 [main] iperf3 3004 cygwin_exception::open_stackdumpfile: Dumping stack trace to iperf3.exe.stackdump

Do you have any idea how we can fix it?


Thank you

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thanks for the input will take a look at my links, and look into that crash..

edit: ok link updated - that was issue with editor on neowin, once I changed to see the code then yeah saw that popup was wrong. Thanks it has been corrected. Now just to take a look at the crash ;)


edit2:  So far have not been able to get this -J working, I get the same crash.  I found some old patches to run compile on windows under cygwin.  I applied them, and seems to still work - but still get crash if -J, what is odd is works under cygwin.  Not just if you try and run with the .dll


I have updated cygwin to latest build, and moved to 64 that got rid of another dll requirement when you run cygcheck..  Need to do some more playing.  Not a huge coder, I can make minor changes, and can follow a long if someone is going over something.  But diving in and looking for something like this from scratch is a bit over my skill set.  But since it works when run inside cygwin, the Exception: STATUS_ACCESS_VIOLATION points me to maybe something in permissions.  Lots of talk of rebase when getting that error..


And just noticed post about having to move the dlls?  Where exactly are you having to put them?  Clearly that is not the case on multiple machines I have run the files on.  Do you have the cygwin dll somewhere else in your path?  Do you have cygwin installed?  Will update any more info I get.. For now guess don't use -J or run it under full cygwin if you need that option on a windows box.  I tried it as well on the linux builds and those are fine for -J.

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I'm trying to compile iperf 3.0.11 using Cygwin x64 (for sure in order to build x64 version of iperf) but got 2 ./configure errors :
checking if gcc supports -fno-rtti -fno-exceptions... ./configure: line 8317: diff: command not found no
nanosleep() required for timing operations.

Of course, I've installed all "Debug" packages (including "coreutils-debuginfo" and "diffutils" which would contains diff and nanosleep) but without success.
Could you help me, please ? Thanks in advance ;)

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      Talking about browsers, it was discovered that the latest version of Firefox allows users to directly change their default browser preference without going through the cumbersome steps to do so, which is a welcome change. It is not clear if this will be mirrored by more apps and browsers going forward, but the Redmond company has received backlash from browser rivals for making the process complicated and less user-friendly.

      Mozilla also announced that it will begin setting Bing as the default search engine on Firefox as part of a test. This will apply to just one percent of desktop users and the test is expected to conclude in early 2022.

      Xbox Game Pass additions, Remote Play on Windows, and more

      This week, Microsoft announced the titles being added for Xbox Game Pass subscribers, which is the second drop for the month. There are 13 games being added, with eight of them being day-one launches. The list includes Aragami 2, Sable, SkateBird, I Am Fish, and many more. Additionally, there are 11 more games that have touch controls enabled when they are streamed through the cloud. There are five titles leaving the service, which happens on September 31.

      If those wanting to run these games on Xbox Series X|S consoles are looking for additional storage and do not want to shell upwards of $200 on an expansion card, a 500GB option might be on its way, at least if a listing spotted in France is to be believed. However, if you have one of those consoles and wish to stream it to your PC, you can now do so using the updated Xbox app on Windows. The app also brings cloud gaming, giving users another way to use the service in addition to doing so from the web.

      Xbox Game Pass Ultimate and Xbox Live Gold members are also receiving a second round of games for the month, with Games with Gold bringing Mulaka for Xbox One and Samurai Shodown II for Xbox 360. Lastly, there are a bunch of discounts as part of Deals with Gold, bringing discounts for titles from the Assassin's Creed, Halo, Forza, and other franchises.

      There doesn’t seem a week that goes by without Halo Infinite news. While minor, this week brought leaked images of Craig the Brute, showing off some visual improvements. This also hints towards the possible arrival of new gameplay that might show off the visual improvements being made.

      Moving on, Call of Duty fans might be interested to learn that Call of Duty 2022 – possible called Call of Duty Modern Warfare 2 – might launch next year. Call of Duty: Vanguard, on the other hand, is slated to launch in November this year.

      Rounding off gaming news is the announcement of a new beta build of Age of Empires IV being made available this weekend. The invites for the beta included almost anyone who wished to try it out. Improvements made thanks to feedback from testers include a further zoom out distance, balance tweaks for English and Chinese civilizations, and a bunch of bug fixes.

      Dev channel
      Microsoft helps bring TEALS computer science curriculum to more schools PSA: Microsoft is ending support for Silverlight next month Xbox is returning to the Tokyo Game Show this year Microsoft’s Brad Smith becomes the vice-chair of the board Teams is getting Customer Lockbox that prevents unauthorized access from Microsoft Commercial Surface customers get more spares for repairs Logging off
      We have been taking a detailed look at the various features and options being added with Windows 11 as part of our Closer Look series. This week, we went through the Default apps settings for the OS, which has been criticized for being less user-friendly by both users and app makers alike. Here is everything you need to know.

      Missed any of the previous columns? Check them all out at this link.

      If you’d like to get a daily digest of news from Neowin, we have a Newsletter you can sign up to either via the ‘Get our newsletter’ widget in the sidebar, or through this link.

    • By anmol112
      Ability to move the Windows 11 taskbar is the most requested feature on Feedback Hub
      by Anmol Mehrotra

      In June, Microsoft announced the Windows 11 update which brought a new UI, features and under the hood changes to the operating system. However, along with the features, the company also removed some features, one of which was the ability to move the taskbar.

      For a long time, Windows has offered an option to move taskbar, allowing users to put the taskbar in one of the four sides of the screen. However, with Windows 11, users will be restricted to having the taskbar at the bottom of the screen as Microsoft has removed the option to move it to the sides or to the top. You can view our deep dive on the Windows 11 taskbar and the changes from Window 10 in our Closer Look article.

      Removing the ability to move the taskbar did not sit well with Windows users and an entry on the Feedback Hub has now gained over 20,000 upvotes with users demanding Microsoft to bring back the ability to move taskbar to the sides or the top. On the Feedback Hub, users note that they don't plan to upgrade to Windows 11 unless Microsoft adds the feature as the location of taskbar is integral to their daily workflow.

      Unfortunately, Microsoft has posted a generic response to the thread which you can read below:

      With Windows 11 slated to roll out from October 5, we don't expect to see the feature back in time. However, we do hope that Microsoft takes the feedback into consideration and adds the feature back at a later stage. You can find the Feedback Hub entry here to give your own upvote or comment.

    • By Usama Jawad96
      Microsoft's PrintNightmare patch breaks printing for some... again
      by Usama Jawad

      PrintNightmare is turning into an actual nightmare not only for Microsoft, but for IT admins as well. Although the Redmond tech giant keeps pushing out patches and claims that all PrintNightmare security holes are now plugged, after every few weeks or so, we learn that this is not really the case. What's worse is that these updates sometimes also break printing for organizations with certain configurations. It appears that this has happened once again, as confirmed by Microsoft in a new advisory.

      A recent Microsoft advisory spotted by WinFuture (via MSPoweruser) notes that August's Patch Tuesday update containing KB5005033 is where the issue originates from. Systems with this update or later installed may have issues with printing, which include:

      Given that administrative credentials are required each time during printing, this effectively breaks the corporate printing process as you can't expect an employee to get direct access to these credentials. The problem affects the following environments:

      The resolution suggested by Microsoft is to ensure that the latest drivers are installed and that this version is the same both on client- and server-side. That said, the company has stated that if this workaround still does not patch the problem, an organization has no option but to contact the OEM of the printer. You can view more details about the issue in the FAQs here, but one thing is certain: The (Print)nightmare continues.