I have one very stupid question, but I want to be sure that I am right. If you have 2 interconnected virtual machines running and let them compute some problem in parallel (using message passing interface - MPI), is it really a parallel computation? I mean, when the host machine has only one core and both VMs use the same memory and resources (though separated), can you talk about parallel computation? I'm asking because I did some tests with with such a setup, but I have noticed no improvement in speed, comparing to computation on one VM. Does anyone have some experience with it? Thanks.
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