Skip to Content.
Sympa Menu

ndt-users - Re: Linux Tcp Tuning and Slow testing speed

Subject: ndt-users list created

List archive

Re: Linux Tcp Tuning and Slow testing speed


Chronological Thread 
  • From: Richard Carlson <>
  • To: ,
  • Subject: Re: Linux Tcp Tuning and Slow testing speed
  • Date: Wed, 19 Oct 2005 13:21:02 -0400

Hi Dale;

I found a bug in the 3.1.4 (and earlier) code. I sent out a patch to this list last week, and a few minutes ago I created a new release that includes this patch. You should download and install the 3.1.4b tarball from the e2epi web site.

There is also an issue with the Linux 2.6.13 kernel so I'm recommending the 2.6.12 series kernel for now. If you are running the 2.6.13 kernel then download and build the 2.6.12 kernel.

Lastly, I updated the INSTALL file to contain some server tuning tips. You can copy section 9. d into your /etc/sysctl.conf file and then run /sbin/sysctl -p to get the changes installed.

Rich
At 09:29 AM 10/19/2005,

wrote:
Hello list,

I'm running ndt 3.1.4 and it seems that at times the server takes more than a minute or two to print the results. Is this normal? From a client on the same switch, it almost always completes in 20s.

I've read that tuning the Linux TCP stack parameters can help this (and make ndt more accurate), but I just can't seem to find a list of what parameters need tuned and to what values.

Thanks for any pointers,

Dale

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



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



Archive powered by MHonArc 2.6.16.

Top of Page