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MathGroup Archive 2009

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Parallel processing downgrade

  • To: mathgroup at smc.vnet.net
  • Subject: [mg98824] Parallel processing downgrade
  • From: mark mcclure <mcmcclur at unca.edu>
  • Date: Mon, 20 Apr 2009 01:32:06 -0400 (EDT)

The change from Mathematica 7.0.0 to 7.0.1 seems to be a
downgrade in the area of parallel processing.  Try
LaunchKernels[8] in both.  Back in good old 7.0.0 you
get:
{KernelObject[1, "local"], KernelObject[2, "local"],
 KernelObject[3, "local"], KernelObject[4, "local"],
 KernelObject[5, "local"], KernelObject[6, "local"],
 KernelObject[7, "local"], KernelObject[8, "local"]}

Eight kernels - cool!

In 7.0.1, you get

{KernelObject[1, "local"], KernelObject[2, "local"],
 KernelObject[3, "local"], KernelObject[4, "local"],
 $Failed, $Failed, $Failed, $Failed}

A little disappointing.

The results are independent of how many processors your
computer has.

Mark McClure


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