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Measuring slow links


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  • From: Isaac González <>
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  • Subject: Measuring slow links
  • Date: Tue, 02 Mar 2010 10:09:28 +0100

Hi,

I've a setup with ndt 3.6.0 version , i've some problems measuring low speed links. For instance:

Measuring a SDSL 2MB (2MB Upload / 2MB Download) the java applet completes correctly and the results seems to be good enough.
Measuring a ADSL 128kbps Download / 32kbps Upload I'm not able to get correct results in upload speed. The java applet gives an error in S2C stage (Server Failed while receiving data.)
Is there some workaround to fix this? Anyone can help me? Do I need to setup some paremeters?

My tcp buffers are this one:

net.core.rmem_max = 33554432
net.core.wmem_max = 33554432
net.core.rmem_default = 131072
net.core.wmem_default = 131072
net.ipv4.tcp_rmem = 4096 131072 16777216
net.ipv4.tcp_wmem = 4096 131072 1677721

Please let me know if you need some debug info.

Thanks in advance.


  • Measuring slow links, Isaac González, 03/02/2010

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