title: MPI Memory Allocation
body: <p>When writing code in C/C++ using MPI, if memory is allocated before MPI_Init is called, how do each of the processes view that memory?  From a test program, I can see that sometimes it's OK and others it isn't.  Does the standard define this?  I can't tell if the memory allocation is copied over to the other processes during MPI_Init, of if I just got lucky because all the processes are 'currently' on a single (multi-core) CPU.</p>