Using all cores with parfor

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Matlab2010 on 19 Nov 2013
Answered: Sean de Wolski on 19 Nov 2013
I have 2013A on a win7 64 bit quod core machine. I do not have the parallel computing toolbox.
I use a parfor loop to carry out a calculation. Each calculation takes 30 mins and is just processing data held in memory. There is no I/O.
I look at windows task manager and see the average CPU load is 40% and only one core seems to be being heavily used. I know when coding in perl I can multi-thread the code to ensure each of the cores is maxed out, giving 100% usage in total.
I dont think I can set matlabpool without the PC toolbox.
How can I improve the situation?

Accepted Answer

Sean de Wolski
Sean de Wolski on 19 Nov 2013
And because you don't have the Parallel Computing Toolbox, parfor will run serially anyway. There is more overhead with parfor so I would recommend against using it if you don't have Parallel Computing Toolbox.
You can contact the friendly account manager for your organization to get a trial of the Parallel Computing Toolbox if it interests you.

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