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To expand on what others have said, you need to take a look at what your program is doing. The important thing to figure out is if there are actions the script does that can be done without knowing if other actions have been completed. In other words, are there actions that can be completely independently of each other? Can you divide-and-conquer the problem a-la the binary search algorithm?

A few rules of thumb:

If you're modifying files in place, this is generally not a good candidate for SMP^*. This is because you might overwrite changes you made in processA with changes made in processB. However, if you can split the files you're modifying in place, modify them separately, then recombine them, then you have a good candidate for SMP.
If you're loading a datafile into a database, this is generally a good candidate for SMP. Just split the file into N pieces and launch N copies of your loading program where N is generally twice the number of processors you have. So, if you have 4 processors, split the datafile into 8 pieces and launch a copy of your loading program for each piece.
If you're building a report from some data, this is generally not a good candidate for SMP by a human. (Databases will handle SMP for you.)

*: SMP = Symmetric Multi Processing - using more than one processor at one time.

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In reply to Re: Taking advantage of multi-processor architecture by dragonchild
in thread Taking advantage of multi-processor architecture by bedanta

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