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Thread: Hyperthreading - should it be enabled?

  1. #1
    sternfan is offline Special Member
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    Question Hyperthreading - should it be enabled?

    Hi All,

    Doing some work on upgrading our Zimbra box... Does zimbra support hyperthreading? Are there any issues with it? Using FC4 - will probably be upgrading to FC5.

    Thanks,
    Rob

  2. #2
    dijichi2 is offline OpenSource Builder & Moderator
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    Default

    Hyperthreading works at a much lower level - as long as you have a vaguely recent 2.6 kernel it will take advantage of it. I can't see any reason not to enable it.

  3. #3
    JoshuaPrismon is offline Zimlet Guru & Moderator
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    Quote Originally Posted by sternfan View Post
    Hi All,

    Doing some work on upgrading our Zimbra box... Does zimbra support hyperthreading? Are there any issues with it? Using FC4 - will probably be upgrading to FC5.

    Thanks,
    Rob
    Yes. Use Hyperthreading. The "fake" CPU does a good enabling some basic optimizations for lots of independent processes (which Zimbra falls into it). In my experience it makes about a 10% different with a SMP Friendly workload.

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