Segmentation Violation with Parallel Toolbox on

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Leonardo Urbano 2015-5-18

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/217336-segmentation-violation-with-parallel-toolbox-on

评论： Rob 2017-5-11

Hi everyone,

I am writing to ask you help with handling of Parallel Matlab Toolbox. I have created a main script that calls another one with a library of .m files that, in sequence, will be executed step-by-step (So that: Script1 -> Script2 -> .m files in sequence). Once finished, .m file passes calculated data to Script2 that calls next .m file and so on till end. If I try to execute the script without Parallel it works perfectly but if I want to speed up the process and include Parallel function spmd it returns an error of Segmentation Violation and forces Matlab closing. All the .m files that I wrote with spmd have in common that spmd function is above a for loop so that it could be split between my 2 CPU Cores and take less time. Strange thing (at least for me) is that if I run only the .m file, without being called from other 2 scripts, it works! Another thing that I have noticed is that when it crashes it doesn't activate parpool while, again, if I run .m file from its own it starts automatically parpool and finishes calculations. I have also tried to start parpool at the beginning of the main script but it crashes anyway.

My PC configuration is:

Matlab 2014b
Macbook Pro 2013 Retina
CPU: Intel Core i5 Dual Core 2.5 Ghz 64bit
OS: OS X 10.10.3 Yosemite
Java Version: Version 8 Update 45 (1.8.0_45-b14)

Anyone has some ideas?

Thank you in advance!

Leo

* UPDATE *

After some trials I have discovered and cleared that main problem is when there is a Parallel process inside a script being called with "run" command. Anyone can suggest me how to handle it (without take "run" off)?