Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!cs.utexas.edu!swrinde!ucsd!ucbvax!van-bc!rsoft!mindlink!a186
From: a186@mindlink.UUCP (Harvey Taylor)
Newsgroups: comp.sys.amiga
Subject: Re: Bus Speeds doc & question
Message-ID: <1889@mindlink.UUCP>
Date: 24 May 90 15:42:59 GMT
Organization: MIND LINK! - British Columbia, Canada
Lines: 39

In <1990May23.021804.12469@uncecs.edu>, urjlew@uncecs.edu (Rostyk Lewyckyj)

writes:
    [table deleted]
>(with no apologies, I have shortened the above table to close
>competitors of the AMIGA)

    Pity. This group seems to need the perspective.

>                             Now on with my tangent :-)
  [...]
>By the above figures, if they mean anything, Zorro III is being rated
>slower than the NuBus and MCA. Personally I doubt some of these
>numbers, although I have seen those for MCA in comp.arch.

    I doubt them too. How are they generated?

  [...]
>In any case whatever the bus speed may be what matters in the end is
>benchmarked thruput on the job stream of your choice. So far posted
>repeatable head to head comparison benchmark results are sadly lacking
>in the network mcbyc computer wars.

    Anybody done this?

  [...]
>What fraction of the time will the cpu be idle waiting for operands
>from memory when doing A + B ? and what fraction of the time will
>the bus be idle waiting on the cpu for A * B or  A/B ?

    Is it not the case that whenever the Execution Unit is tied up
 with a many cycle op such as MULT that the Bus Controller will take
 the opportunity to start refilling the caches?

 "Accurate reckoning - the entrance into the knowledge of all existing
        things and all obscure secrets." -Ahmes the scribe, ca.1700 BC
      Harvey Taylor      Meta Media Productions
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               a186@mindlink.UUCP