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Thread: Dell Mini 9 / Ubuntu 9.04 Showing 2 Processors...Maybe due to hyper-threading?

  1. #1
    Join Date
    Oct 2007
    Beans
    10
    Distro
    Ubuntu 7.10 Gutsy Gibbon

    Dell Mini 9 / Ubuntu 9.04 Showing 2 Processors...Maybe due to hyper-threading?

    Okay so I've searched all over the net and all over the Ubuntu forums however I am not able to figure out what is going on with my Dell Mini 9.

    I installed Ubuntu 9.04 Beta on my Mini and when I check the system monitor it shows my Mini as having two processors when I am pretty sure the N270 for laptops only has a single core and not dual cores. A friend of mine said it was showing two due to hyper-threading, but I did not think hyper-threading was even enabled by default.

    So does anyone have any experience with the Mini 9 + Ubuntu 9.04 and if so do you have any idea what is going on? Is this hyper-threading? Do I actually have a dual core atom processor? Any help would be greatly appreciated. Thanks.

  2. #2
    Join Date
    Aug 2006
    Beans
    3

    Re: Dell Mini 9 / Ubuntu 9.04 Showing 2 Processors...Maybe due to hyper-threading?

    Yup, you're 100% right.

    From memory the Dell has a hyperthreading atom? My Aspire One runs an Atom too, and the two processors that appear in /proc/cpuinfo are due to the hyperthreading.

  3. #3
    Join Date
    Apr 2009
    Location
    Ireland
    Beans
    115
    Distro
    Ubuntu 9.04 Jaunty Jackalope

    Re: Dell Mini 9 / Ubuntu 9.04 Showing 2 Processors...Maybe due to hyper-threading?

    Yes, that's correct. I'm almost certain that all Atoms have hyper-threading so you'll see 2 processors for your one physical atom cpu.

  4. #4
    Join Date
    Jan 2007
    Beans
    209

    Re: Dell Mini 9 / Ubuntu 9.04 Showing 2 Processors...Maybe due to hyper-threading?

    I have a dual core 330 and it shows up as 4 processors.

    So let me add a question...If processor one is 40% busy, processor two is 20%, processor three is 10% busy and four is 10% busy then how busy are my processors? Is core one 60% busy or 30% busy? Is core two 20% busy or 10% busy?

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