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Wrong nomber of core on a computenode RRS feed

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    hi,
    I have 16 DELL R410 bi-sockets (8 cores each node)
    i see 16 cores on one of them in the HPC Manager. I have re-image the node, but I still see 16 core on it.

    Any idea ?
    Tuesday, February 23, 2010 4:41 PM

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    OK,
    Thanks for this usefull doc.
    • Marked as answer by jfsardon Tuesday, February 23, 2010 9:08 PM
    Tuesday, February 23, 2010 8:18 PM

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    Hello there
    Sounds like you have Logical Processors (AKA Hyperthreading) enabled in the BIOS on that node. To check this out / switch it off go into the BIOS and disable Processor Settings / Logical Processor. 
    Of course depending on your workloads you may want Logical Processors to be enabled. It's worth checking out Dell's recommended BIOS settings for HPC nodes: http://i.dell.com/sites/content/business/solutions/whitepapers/en/documents/HPC_Dell_11G_BIOS_Options.pdf there's some interesting stuff in there...
    Dan
    • Proposed as answer by DanAdams Wednesday, February 24, 2010 10:09 AM
    Tuesday, February 23, 2010 5:32 PM
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    OK,
    Thanks for this usefull doc.
    • Marked as answer by jfsardon Tuesday, February 23, 2010 9:08 PM
    Tuesday, February 23, 2010 8:18 PM