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Intel Hyperthreading In Reality

Posted by ryuzaki0 on from the make-go-faster dept.

A reader writes: "Looks like GamePC has got the first look at Intel's new Xeon processor, which has the new super-fantastico Hyperthreading technology, which tricks your OS into thinking one CPU is two CPUs, two CPUs is four. Looks neat in theory, benchies included."

1 of 285 comments (clear)

  1. Yup correct by esses · · Score: 2, Insightful

    I was trying to simplify things... I probably went a bit too far.

    The regsiter level contentions are alleivated with Out of order execution (more ore less).

    A good example of where hyperthreading helps is the front side bus. Procesors tend to spend over 80% of their time executing out of cache. Thus the front side bus is sitting idle (or performing simple snoops).

    If one thread is going to be memory intensive (video streaming for example... or texture manipulation), or even I/O intensive and thus results in a lot of transactions along the FSB... it can occur at the same time as a second thread that's FPU intensive

    (asuming the I/O intensive one isn't FPU intensive as well).