IZ1 and UD2-MM Usage of RAM

How is RAM used by processes in UD2-MM and IZ1 (also known as ARM or SoC devices)?

A total of 1024 MB main memory is divided as follows:

• ~128 MB is used for graphics
• ~362 MB is used for internal processes such as communication between DSP and ARM processor
• ~534 MB is available for user processes