How do you assign the number of cores via an ssh script?

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Alessandro Maria Laspina 2020-12-26

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评论： Raymond Norris 2021-1-2

采纳的回答： Alessandro Maria Laspina

Hello,

i have a batch script file that is run on an ssh with the following format:

nohup matlab -nodesktop -nosplash -nodisplay <script_file.m>& output_script_file.txt &

I want to set the number of cores for the job to 6, seeing as the script_file.m uses a parfor loop. I know feature('numcores') will display the number of cores available, but I want to specifically assign the number of cores. Is this done through the batch script file, and if so how? If not, how can I assign the number of cores to a job on an ssh?

Thanks.

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Alessandro Maria Laspina 2020-12-27

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编辑：Alessandro Maria Laspina 2020-12-28

I've tried running Walter Roberson's answer, but for some reason i've had to include maxNumCompThreads(6) in the script file at the start.

Also the > gave me an error as well.

This seemed to work:

nohup matlab -nodesktop -nosplash -nodisplay -batch <script_file> & output_script_file.txt &

EDIT:

As Walter Roberson wrote, > and & should not have a space, so it is:

nohup matlab -nodesktop -nosplash -nodisplay <script_file.m>& output_file.txt &

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Walter Roberson 2020-12-27

If I recall correctly, you are not permitted to have a space between the > and the &

Alessandro Maria Laspina 2020-12-28

Indeed! Thank you for pointing it out.

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Walter Roberson 2020-12-26

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https://www.mathworks.com/help/matlab/ref/maxnumcompthreads.html

However you could also consider modifying the cluster profile to limit the cores in it.

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Alessandro Maria Laspina 2020-12-27

Had to change the syntax a bit for it to work. Thanks for the help!

Raymond Norris 2021-1-2

在 MATLAB Online 中打开

Also consider using the -logfile switch

nohup matlab -batch 'maxNumCompThreads(6);script_file' -logfile output_script_file.txt &

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