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AMD vs. Intel Floating Point

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  • Milton Brown
    The prime number group, might be interested in these timings. Milton L. Brown ... From: Jens-Peer Kuska To:
    Message 1 of 1 , Jun 22, 2001
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      The prime number group, might be interested in
      these timings.

      Milton L. Brown
      ----- Original Message -----
      From: "Jens-Peer Kuska" <kuska@...-leipzig.de>
      To: <mathgroup@...>
      Sent: Thursday, June 21, 2001 11:20 PM
      Subject: [mg29486] Re: AMD vs. Intel Floating Point


      > Hi,
      >
      > a) the Mathematica speed comparsion from
      >
      > http://fampm201.tu-graz.ac.at/karl/timings40.html
      >
      > is posted regular in this news group
      > b) on the www-site of *this* news group
      >
      > http://smc.vnet.net/mathgroup.html
      >
      > the second head line is a link to various speed
      > comparsions found at
      >
      > http://smc.vnet.net/mathbench.html
      >
      > and it is quite natural to assume, that a poster to a
      > news-group has visited the newsgroup hompage and
      > is able to read and understand the headings on a page
      > that begins with:
      >
      > -----------------------------------------------------------
      > >Designed by S. Christensen.
      > >
      > >MathGroup
      > >
      > >The Email Group for Mathematica Users
      > >
      > >Comparison of Mathematica on Various Computers
      > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      > >
      > >MathGroup is now linked to the moderated newsgroup
      > >
      > >comp.soft-sys.math.mathematica
      > >
      > > on the Internet. Contact your local system administrator
      > > to find out how to read this new group.
      > -----------------------------------------------------------
      >
      > *and* it is quite natural to assume that a poster to the news group
      > has read the group rules (on the same page) one of it say:
      >
      > >PLEASE SEARCH THE ARCHIVES BEFORE YOU ASK WHAT MIGHT BE A COMMON
      QUESTION.
      > >See the links above for this.
      >
      > It must be also sayed, that the Mathematica speed depends in the
      > most (symbolic) applications not on the floating point power
      > of the CPU. The most actions performed by Mathematica are pointer
      > operations with it's internal data structures. I would assume that
      > 80-90 % of Mathematica's CPU load are pure interger operations.
      > High precision calculations, symbolic operations, operations with
      > integers, rationals ... all that don't use the floating point hardware.
      >
      > It depends shaply on the application how much floating point operations
      > are used. But when a Mathematica function has such a huge floating
      > point
      > load it is always better to write a MathLink program.
      >
      > Regards
      > Jens
      >
      >
      >
      > Morfeas79a wrote:
      > >
      > > Kofi
      > > as it is well known the AMD processors up untill the model of K6-3D
      > > have serious problems in their floating point operations - this can be
      > > observed by running programs with great CPU load like SETI@home, the
      > > time for a AMD computer to finish one work unit is about twice as big
      > > as this in an Intel computer running on the same MHz. The problem has
      > > been solved in later models. Of course all this is not known to
      > > Mr.Kuska who thinks that 90% of the questions sent in this newsgroup
      > > are of trivial nature or in anycase foolish.
      > >
      > > Regards
      > > Jim
      >
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