1 Reply Latest reply on Mar 20, 2017 10:52 AM by Intel Corporation

    Memory Bandwidth on HPC system

    MinhChung

      Hi all,

      I am having a problem with the performance of our system (256GB RAM, CPU E5-2680 v3 @ 2.50GHz, Xeon Phi 7200q). When I check the performance with Linpack tool, the result is not stable, sometimes it is dropped.

      I debugged the tool and figured out the problem caused by Memory Bandwidth on NUMA model.

       

      Node 19
      Numa node01
      058516.3886.2
      128470717.6

      This is the result of one in our compute nodes. The bandwidth (MB/s) of memory on NUMA node 1 is very bad.

       

      Can you give me some cases that you have experienced with this problem? Or, you can give me some recommends about the reasons which can be the cause of this problem.

      Thank you!

       

      Message was edited by: Minh Chung