I come across a question-'How big an address space should I allocate for each ARM A53 core in a mobile processor?' What is the answer for this? Does it refer to memory management in SoC?
Answers to this kind of question would mostly come from knowing the memory behavior of the software you're going to run on it. My advice would be to start with monitoring, then use eg. twice what seems to be a normal level. Without monitoring, you will never get past guessing. Which is quite okay for the initial values, btw.