My parallel computing code (R2013b) is very slow

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Sebastiano delre 2014-7-21

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回答： Sebastiano delre 2014-7-21

Hi! I am trying to use parallel computing and parfor loops with my R2013b MatLab version. I can already use parfor cycles but they are slow, a bit slower that the corresponding for cycle. Why is that? When I write parpool in the command window, I get: undefined function or variable 'parpool' Thank you for your help, Sebastiano.

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Answer 1

Shashank Prasanna 2014-7-21

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在 MATLAB Online 中打开

If you have Parallel Computing Toolbox installed you shouldn't see the error message. Confirm you have Parallel Computing Toolbox installed by typing the following on the command line:

>> ver

If you are using an earlier of MATLAB, replace parpool with matlabpool

Take a look at the release notes for 13b:

http://www.mathworks.com/help/distcomp/release-notes.html#bt0lecr-1