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Ping Pong throughput test results issues

    Question

  • Hello there !

    I'm experiencing some issue runing the ping pong test in a Microsoft HPC 2012R2. The throughput results I got, are much lower than expected. Using a 10G ethernet adapter, the throughput is around 5,6Gbit/s, Running the nttcp test the result is almost 10Gbit/s ( 1181 Mb/s).

    Can somebody let me know for the difference between the above tests ?

    I wonder what will happened if I add a second 10G ethernet adapter and implement teaming. I assume that the bandwidth will be increased. Is it correct ?

    I've already have an open case in Microsoft but I need a quick answer if possible.

    Thanks & Regards

    Sakis

    Friday, November 3, 2017 5:38 PM

All replies

  • Hi Sakis,

    Please check this link for detailed explanation of MPI Ping Pong tests. Note if there is any job running on the nodes, the test throughput could be impacted.

    As for NIC teaming, when configured properly, the MPI througput should be increased. Check this post.

    Regards,

    Yutong Sun

    Thursday, November 16, 2017 2:19 PM