Parfor iterations and number of cores

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Jaya
Jaya 2021-11-8
评论： Jaya 2021-11-8
I am using parfor for the first time. I run a piece of code 'multiple' times and get an output y each time. Finally, I take average of all such y to get the avg_y. So, I decided to use parfor for the 'multiple' times.
My laptop is quad core and my question is that can't I run the parfor more than 4 times? As I want to run the parfor loop code 10 times and then average the y values....

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Matt J
Matt J 2021-11-8
编辑：Matt J 2021-11-8
The number of loop iterations isn't limited by the number of cores you have. However, if you have 4 cores, the loop iterations cannot be split into more than 4 parallel groups. So, for example, if you have 40 loop iterations, each core must do 10 of them.
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Jaya
Jaya 2021-11-8
Thanks. I did that later. Actually I asked another question related to this but the reverse case. Can you please take a look at that also? Link is https://www.mathworks.com/matlabcentral/answers/1581179-specifying-more-cores-than-needed-for-parfor-any-speedup

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