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Re: Parallel processing

  • To: mathgroup at
  • Subject: [mg100267] Re: Parallel processing
  • From: Michael Weyrauch <michael.weyrauch at>
  • Date: Fri, 29 May 2009 21:01:14 -0400 (EDT)
  • References: <gvlq9j$isl$> <gvn71i$ers$>
  • Reply-to: michael.weyrauch at

Well, I know (from experience) that linear algebra routines were
paralellized already prior to version 7. So, when I used NDSolve
to solve large systems of coupled ordinary differential equations,
which makes heavy use of such routines, the calculation actually
used (magically, because I did not have to do anything for that)
parallel processing even in version 5.2 and 6.

David Bailey schrieb:
> dh wrote:
>> Hello,
>> I am running version 7.01 on a quad core CPU. I am doing some heavy 
>> calculations but was too lazy to use any special commands for 
>> parallelization.
>> However, to my surprise, when I check the performance I see that all 4 
>> kernels a busy calculating.
>> Does anybody have any info about this automatic parallelization of 
>> Mathematica?
>> Daniel
> Prior to 7.0 there was talk that certain cpu-intensive algorithms would 
> make use of multiple cores where appropriate - presumable they still do. 
> Where does your program spend its time?
> David Bailey

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