Using multiple CPU each with multicore, MATLAB only uses one of the CPUS

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Moh 2014-6-22

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评论： Tyler Warner 2018-5-22

Hi,

I am trying to run a MATLAB code with a computer system that has two cpus and each have 12 cores. But when I use fft or fft2 command it only uses 50% of computing power, i.e. only one cpu or only 12 cores. When I use parallel processing toolbox similar thing is shown. When I use "matlabpool open" also it says 12 workers not 24 workers. How can I use the potential 24 cores that are in two cpus on my machine for vector operation or parallel processing in MATLAB? Any help or information is greatly appreciated.

Thanks, Moh.

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回答（1 个）

Shashank Prasanna 2014-6-23

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In MATLAB 2014a, there are no limits to how many workers you can use on a single machine, however it is recommended that you use number of workers = number of cores.

Sounds like you have two CPUs with 12 cores each - in this case where each cpu is a node, you may need to use MDCS that can talk to a scheduler to distribute jobs across multiple machines.

These differences are explained here: http://www.mathworks.com/discovery/matlab-multicore.html