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10GB configured Flex10/532m gives only 4GB thruput in Linux - Ideas?

 
vcblades
Frequent Advisor

10GB configured Flex10/532m gives only 4GB thruput in Linux - Ideas?

I am trying to measure the thruput using iperf and is saying that I get only 4GB out of the 10GB flex10 NIC ( though i set it to custom 10GB for that port) Any ideas on how to test this and are there any performance tweaks that needs to be taken care of? TCP windowsize etc to achieve ~10GB thruput. I tested only a single instance and measured while transfering a 10GB~20GB file from server A to server B and am getting only 4GB in linux/flex10/NC532m ..still need to test on multiple instances and see why we are not getting atleast 10GB Thanks for all your responses - will be looking at this thread closely but may not be able to respond immediately - just drop your thoughts - Thanks
2 REPLIES
vcblades
Frequent Advisor

10GB configured Flex10/532m gives only 4GB thruput in Linux - Ideas?

http://www.redhat.com/promo/summit/2008/downloads/pdf/Thursday/Mark_Wagner.pdf Good Luck If any would like to add for windows that wold be great... - Thanks.
asentaja
Occasional Visitor

10GB configured Flex10/532m gives only 4GB thruput in Linux - Ideas?

Hi. Have You think about Jumbo Frames in Your enviroment? FInd some information and test if You can..