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Hyper Threading

  • November 23, 2005 at 12:33 am

    #111522

    Hi,

     What is the difference between processors that contain HTT and multiple-core processors?

     

    from

    Killer

  • November 24, 2005 at 4:46 am

    #605669

    Big difference, and if it is a server environment you are looking at then HT switched on has been shown to to reduce a processors efficiency under load. With out getting into the nitty gritty HT capitilises on the fact that the P4 architecute has such a long pipeline - so stuffs the next bit information to process in before the the bit it is following has finished - problem here that if the prediction of the first calculation is wrong then it then has to scrap the second bit through the pipe and start again. 

    Dual core is literally that - two independant procsseing units in a single chip each able to work independantly hence simultaneously processing threads on different cores.

  • November 24, 2005 at 12:04 pm

    #605749

    For details on hyper threading, multi-core and multi processors see:

    http://www.intel.com/cd/ids/developer/asmo-na/eng/200677.htm?page=2

  • November 25, 2005 at 9:13 pm

    #605925

    Hi,

     

     

    Processors enabled with HTT share more resources (for example, execution resources) on the same physical processor than do multiple-core processors. For example, multiple-core processors have separate execution units and first-level memory caches.

     

    from

    Killer

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