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Re: ParallelMap in FindMinimum getting slower

• To: mathgroup at smc.vnet.net
• Subject: [mg121981] Re: ParallelMap in FindMinimum getting slower
• From: Oliver Ruebenkoenig <ruebenko at wolfram.com>
• Date: Sat, 8 Oct 2011 05:31:47 -0400 (EDT)
• Delivered-to: l-mathgroup@mail-archive0.wolfram.com
• References: <201110070848.EAA07424@smc.vnet.net>

On Fri, 7 Oct 2011, Rafael Reiter wrote:

> Hi everyone,
>
> I use ParallelMap with Mathematica on Linux to solve 100 eigenvalue
> problems on 4 kernels. This operation ist repeated very often by
> FindMinimum, and over the course of time the performance drops
> significantly. Using top, you can see that the CPU used by the master
> kernel increases, and the CPU used by the slave kernels decreases from
> 70 to appr. 20 percent. Has anyone else experienced this phenomenon?
>
> Best wishes,
> Rafael
>
>

Can you send the example?

Oliver

• References:
  • ParallelMap in FindMinimum getting slower
    • From: Rafael Reiter <mail@zonk.at>