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Thread: SES and Spectre/Meltdown performance hit

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  1. SES and Spectre/Meltdown performance hit

    Has anyone benchmarked SES 4 or 5 to see what the mitigation from SUSE does to performance yet? Ugh and the thread title should be "and" rather than "amd".

    thanks,
    Andrew
    Last edited by malcolmlewis; 09-Jan-2018 at 02:10. Reason: Fixed typo in thread title.

  2. Re: SES and Spectre/Meltdown performance hit

    Hi Andrew,.

    the ceph-users mailing list has one actual test result (http://lists.ceph.com/pipermail/ceph...ry/023717.html), stating

    CPU bound test (HPL) showed a 2% hit.
    i/o bound test (fio) showed 30%.
    While those tests were likely not run on SES, but some other variant of Ceph, I believe SES cluster nodes would show similar numbers due to the low-level nature of the work-around.

    Regards,
    J
    From the times when today's "old school" was "new school"

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  3. Re: SES and Spectre/Meltdown performance hit

    Thanks for the reply Jens. I lurk on ceph-users too but it's easy to miss one email.

    Andrew

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