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back to article Facebook: No 'definite plans' to ARM data centers

Facebook's first custom-built data center – the Prineville, Oregon facility that it just "open sourced" – uses standard x86 chips from Intel and AMD. But there's little doubt the social networking giant is exploring the use of so-called massively multicore servers packed with hundreds of low-power ARM chips, or even silicon from …

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  1. John Smith 19 Gold badge
    Happy

    Amdahls law

    In amongst the orgy of lets lets-see-how-many-cores-we-can-stuff-on-a-chip I wondered when *someone* would recall that.

    Something to keep in mind.

    Simple example. You have 48 cores on a chip.

    Have you got 48 *address* buses to match them?

    Interleave *48* address requests with *minimal* (I don't believe that many execution paths could interleave perfectly) gaps?

    48 (or 96 or more) memory planes to match them?

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    1. John Sturdy
      Reply Icon
      Joke

      That explains it

      You mean "what were they smoking when they designed that?"?

      I was wondering what TFA meant by "new-age chip maker Tilera".

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