perfSONAR User Q&A and Other Discussion

[Jason Zurawski <>]

Hey Pol;

If you are hitting a a wall, it sounds like an OS tuning lever may have been altered.  This was reported last week with regards to the txqueuelen:

https://lists.internet2.edu/sympa/arc/perfsonar-user/2016-03/msg00130.html

Other likely suspects to inspect could be the /etc/sysctl.conf file.  If your NIC requires a custom driver (e.g. its newer hardware from mellonox, or anyone else that can't use the standards from RHEL) it may be worth checking that out too. 

Thanks;

-jason

Pol Llovet wrote:

Hi all,

I wanted to ask for advice on checking the setup/tuning for a re-installed perfsonar  setup.  I was previously getting reasonable results on our DMZ ps node (enough to show that the WAN was having trouble), but the system required a reinstall.  Afterwards, I am getting sub-100Mbps bwctl for the 10GbE interface (upwards of 10x slower than before the reinstall). No matter where I am testing to, the numbers are way off. It looks like something is not right, but I am not sure where to start looking.  This is a fairly fresh install of  the latest PS toolkit.

Any advice would be appreciated.

thanks!

-- 

Pol LLovet

Assc. Director of Research CI

Montana State University

XSEDE Campus Champion

http://montana.edu/rci

o: 406-994-3416

m: 406-646-6747