Hi, If you are running regular programs under an OS, two different processes will never access the same physical memory unless explicitly asked to the OS through mechanisms like mmap. In particular, malloc will return virtual addresses that are mapped to physical addresses that are specific to your process, i.e., the same virtual memory address in two different processes is mapped to different physical memory locations.
If you are running without an OS, that is in bare metal mode, then you are on your own and you must take care of what the OS was previously doing for you, memory management being one of these things. Can you ellaborate on the experiments you are conducting ? What program, what platform, etc. Regards, Gabriel
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