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Re: Runtime error with NDT CVS


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  • From: Matt Selsky <>
  • To: Richard Carlson <>
  • Cc:
  • Subject: Re: Runtime error with NDT CVS
  • Date: Wed, 19 Jul 2006 11:48:28 -0500

Rich--

With your 3.1.13 tarball...

$ ./web100clt -dddddd -llllll miranda.ctd.anl.gov
Testing network path for configuration and performance problems -- Using IPv4 addresses
read 1 octets '0'
Test port numbers not received, read 2nd packet to get them
Testing will begin using port 3003 and 3002
connecting to 146.137.222.101:3003

Send buffer set to 32768, Receive buffer set to 57344
Checking for Middleboxes . . . . . . . . . . . . . . . . . . CWND limited speed = Inf Kbps
Done

And then nothing. I did an strace on the process and all I see is "read(3, ".


--
Matt

On Jul 18, 2006, at 9:50 AM, Richard Carlson wrote:

Matt;

I just uploaded the ndt-3.1.13.tar.gz tarball to the e2epi.internet2.edu/ndt/downloads page. The web100clt should be compatible with the server running on miranda.ctd.anl.gov It works from my FreeBSD and Linux 2.4.24 test systems.

Let us know what happens.

Rich

At 08:38 PM 7/17/2006,

wrote:
I'm using NDT from SourceForge's CVS (http:// ndt.cvs.sourceforge.net/ndt/ndt/src/web100clt.c?view=log) on FreeBSD 4.11-STABLE and it fails with the following error:

read failed read 'Go' flag

Here is the debug output:

$ ./web100clt -dddddd miranda.ctd.anl.gov
Testing network path for configuration and performance problems -- Using IPv4 addresses
read 1 octets '0'
Test port numbers not received, read 2nd packet to get them
Testing will begin using port 3003 and 3002
connecting to 146.137.222.101:3003

Send buffer set to 32768, Receive buffer set to 57344
Checking for Middleboxes . . . . . . . . . . . . . . . . . . CWND limited speed = Inf Kbps
Done
read failed read 'Go' flag


Is there a better version of NDT that I should be using? I tried the version linked from the E2EPI website (3.1.4b), but that fails with an EPIPE error.

$ ./web100clt -dddddd miranda.ctd.anl.gov
Testing network path for configuration and performance problems
read 1 octets '0'
Test port numbers not received, read 2nd packet to get them
Testing will begin using port 3003 and 3002

Send buffer set to 32768, Receive buffer set to 57344
Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
running 10s outbound test (client to server) . . . . .
Send buffer set to 32768, Receive buffer set to 57344
Broken pipe

Thanks in advance for your help.


--
Matt

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



Richard A. Carlson e-mail:
Network Engineer phone: (734) 352-7043
Internet2 fax: (734) 913-4255
1000 Oakbrook Dr; Suite 300
Ann Arbor, MI 48104




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