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Thread: New Low-Latency Ubuntu Server Build Proposed

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  1. #1
    Join Date
    Jan 2007
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    Default New Low-Latency Ubuntu Server Build Proposed

    Phoronix: New Low-Latency Ubuntu Server Build Proposed

    Canonical's Tim Gardner is seeking comments regarding a new build of Ubuntu Server that he is proposing. Canonical is considering another build of Ubuntu Server (there is already Ubuntu Server 32-bit and 64-bit along with specialized builds for cloud computing with Amazon EC2 and UEC), but this one would be specialized for just 64-bit platforms that have low-latency requirements and on power consumptive systems...

    http://www.phoronix.com/vr.php?view=Nzg5Mw

  2. #2
    Join Date
    Sep 2006
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    714

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    WTH is with all this special Ubuntu versions?

    If you want a low latency version then just offer a low-latency kernel that is a optional install and setup a group for realtime rights that a person can add a account to.

    Does not seem a significant amount of difference from a normal server to justify a new variant.

    Redhat is successful with working with companies that have special requirements like this. Figure out how they deal with it and see if it's worth copying.


    I can do everything described above, and a lot more, just by taking a base Debian install and installing packages and reading the documentation provided by those packages.

  3. #3
    Join Date
    May 2007
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    Third Rock from the Sun
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    Default

    Quote Originally Posted by drag View Post
    WTH is with all this special Ubuntu versions?

    If you want a low latency version then just offer a low-latency kernel that is a optional install and setup a group for realtime rights that a person can add a account to.

    Does not seem a significant amount of difference from a normal server to justify a new variant.

    Redhat is successful with working with companies that have special requirements like this. Figure out how they deal with it and see if it's worth copying.


    I can do everything described above, and a lot more, just by taking a base Debian install and installing packages and reading the documentation provided by those packages.
    Ya I don't see the need for a special ubuntu version as well. Why not just have a different kernel config package. Sounds like a lot of extra work for nothing. In openSUSE 11.2 we did just such a kernel package for a low latency desktop kernel.

  4. #4
    Join Date
    Oct 2007
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    I've moved on to Debian for my main OS. I still support Ubuntu, but some of their ideas leave me scratching my head. :\

  5. #5
    Join Date
    Mar 2009
    Location
    Portland
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    32

    Default bit misguided

    Disabling C states? Why? The kernel has a perfectly fine API to control the latency via a file in /dev, and with that you only disable the C states that are needed, and only for the duration you care about latency.

    Also, as of 2.6.32, the cpuidle code should be a lot better about reducing the average latency you get in practice..

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