iperf version update in DCE

[Ahmad]

Hi,

I am using Direct Code Execution with MPTCP version 0.89, dce/sim-ns3-3.14.0-branch. In this release, the iperf version is 2.0.5. I want to upgrade it to iperf version 3 to get some additional functionality. Kindly tell me, how can I upgrade it to iperf 3.

Regards,

Ahmad.

[Richard]

Getting iperf3 working with DCE isn't straightforward, I needed to patch both iperf and ns-3.

You can try checking out the dce branch from github.com/RichardWithnell/iperf

If you have any trouble, I can hopefully point you to the correct patches for ns-3-dce, my fork should work but it will be outdated now.

Best,

Richard

[Basharat Ahmad]

Thank you so much Sir. I will try this and will let you know about the status.

Regards,

Ahmad

--
Posting to this group should follow these guidelines https://www.nsnam.org/wiki/Ns-3-users-guidelines-for-posting
---
You received this message because you are subscribed to a topic in the Google Groups "ns-3-users" group.
To unsubscribe from this topic, visit https://groups.google.com/d/topic/ns-3-users/Wqe5dRWL6tM/unsubscribe.
To unsubscribe from this group and all its topics, send an email to ns-3-users+...@googlegroups.com.
To post to this group, send email to ns-3-...@googlegroups.com.
Visit this group at https://groups.google.com/group/ns-3-users.
For more options, visit https://groups.google.com/d/optout.

--

"Children are remarkably honest creatures until we teach them not to be"

Regards,

Basharat Ahmad

[Matt Anonyme]

Thanks for sharing the code. Do you plan to upstream it either Ahmad or richard ? iperf3 support in DCE was requested several times and I believe Hajime would  agree to it :)

[Jianwei Liu]

Hi Ahmad, 

  Have you got any luck in making iperf3 work with DCE? I tried several versions of iperf3. I think one problem I had is the "clock" system call is not implemented in the current DCE. (there is a dce-clock.h, but the function in it is not implemented). I am not sure whether anyone else met the same problem, and how that is solved? I tried to implement it using clock_gettime, but resulted in iperf stuck in a loop. Not sure why, and how to debug that.

Best,

Jianwei

[Richard Withnell]

As far as I can tell the clock function is only useful if you want to check cpu utilization, so I stripped it from the DCE branch. 

I have no plans to upstream at present but I may do so in the future, time permitting. 

[Matt Anonyme]

Would you mind if I were to upstream it (crediting you ofc) ? I don't know when but I need to compare iperf2 and iperf3 so I might get the chance to do so.

[Richard]

It would be great if you could, Matt.

[Jayway Liu]

Hi Richard, 

   I tried your version, it complied with no problem. But, when running it, it shows this error "iperf3: error - unable to create a new stream: No such file or directory" at the server side.  Any idea on how to solve it? Is it related to NS3 dce do not have a /tmp directory? (a related link https://github.com/esnet/iperf/issues/374) 

Thanks,

Jianwei

[Matt Anonyme]

Hi,

you can check out for a working example of iperf3 https://github.com/direct-code-execution/ns-3-dce/pull/43

[Jayway Liu]

Thanks Matt! I tried the example "dce-iperf.cc" in that link. It is still the same mktemp error.  I tried with both Richard's iperf version and this one. 

Did you mean I need to checkout the latest dce from the git repository? 

Also, I tried to install a "Folder Creator App" before installing the iperf DceApplicationHelper. 

I also tried replacing the DceApplicationHelper with this new ApplicationHelper.  But still the same error. 

####################################

#include "folder-create-helper.h"

#include "dce-application.h"

#include "ns3/log.h"

#include "utils.h"

//#include <fstream>

#include <stdlib.h>

#include <unistd.h>

NS_LOG_COMPONENT_DEFINE ("FolderCreateHelper");

namespace ns3 {

FolderCreateHelper::FolderCreateHelper ()

{

}

FolderCreateHelper::~FolderCreateHelper ()

{

    /*

  std::stringstream oss;

  oss << "rm -rf /tmp/iperf3*";

  ::system (oss.str ().c_str ());

  */

}

  

ApplicationContainer

FolderCreateHelper::Install (NodeContainer c)

{

  NS_LOG_FUNCTION (this);

  ApplicationContainer apps;

  for (NodeContainer::Iterator j = c.Begin (); j != c.End (); ++j)

    {

      int nodeId = (*j)->GetId ();

      std::stringstream oss;

      oss << "/tmp";

      UtilsEnsureDirectoryExists (oss.str ());

    }

  return DceApplicationHelper::Install (c);

}

ApplicationContainer 

FolderCreateHelper::InstallInNode (Ptr<Node> node)

{

  NS_LOG_FUNCTION (this);

  ApplicationContainer apps;

      int nodeId = node->GetId ();

      std::stringstream oss;

      oss << "/tmp";

      UtilsEnsureDirectoryExists (oss.str ());

  return DceApplicationHelper::InstallInNode (node);

}

}

###################################################

But, it failed with another error.  The server side is OK now, but the client side has the same problem:

jianwel@jianwei-u14:~/projects/ns3/current/source/ns-3-dce$ cat files-6/var/log/8606/*

iperf3 -c 7.0.0.8 -J -i 5 --time 5 

Start Time: NS3 Time:          5s (          +5000000000.0ns) , REAL Time: 1492464048

      Time: NS3 Time:          5s (          +5000000000.0ns) , REAL Time: 1492464048 --> Starting: /home/jianwel/projects/ns3/new-bake-with-more-module/build/bin/iperf3

      Time: NS3 Time:          5s (          +5130128689.0ns) , REAL Time: 1492464050 --> Exit (1)

{

"start": {

"connected": [],

"version": "iperf 3.1",

"system_info": "NODE_6's OS NODE_6 3 12 6",

"timestamp": {

"time": "Fri, 01 Jan 2010 00:00:05 GMT",

"timesecs": 1262304005

},

"connecting_to": {

"host": "7.0.0.8",

"port": 5201

},

"cookie": "NODE_6.1262304005.000000.1ad5cb71083",

"tcp_mss_default": 524

},

"intervals": [],

"end": {

},

"error": "error - unable to create a new stream: No such file or directory"

}

BTW, is the change in the utils/iperf3_1.patch? where can I find that file?

[Jayway Liu]

I have tried another change. 

changing the folder creation code to

  UtilsEnsureDirectoryExists (UtilsGetAbsRealFilePath (nodeId, "/tmp"));

Now I can see the tmp in files-*

and the iperf3 files under them, 

client iperf3.ooWHll

server iperf3.QuXWUq

but the server side still complains about the same problem

cat files-1/var/log/11483/stdout

iperf 3.1

NODE_1's OS NODE_1 3 12 1

-----------------------------------------------------------

Server listening on 5201

-----------------------------------------------------------

Time: Fri, 01 Jan 2010 00:00:05 GMT

Accepted connection from 10.1.1.1, port 37660

      Cookie: NODE_0.1262304005.000000.7a0217c30e1

      TCP MSS: 1428 (default)

iperf3: error - unable to create a new stream: No such file or directory

iperf 3.1

NODE_1's OS NODE_1 3 12 1

-----------------------------------------------------------

Server listening on 5201

-----------------------------------------------------------

[Jayway Liu]

Problem solved after debugging the IECREATESTREAM error. It is because of the unlink. Then I noticed that part of code was commented out in Richard's version. I used the matt branch of this link this afternoon https://github.com/teto/iperf/tree/matt, which turns out does not work for me.