Embedded Systems Design, 2nd Edition

238 Embedded systems design

Given this performance difference, it is important that the

memory resources are carefully allocated. In the example, task A

requires the best performance and the system needs fast task

switching. This means that both the task A code and data, along

with the RTOS and the system stack, are allocated to the internal

memory where it will get the best performance. All other task code

and data are stored externally because all the internal memory is

used.

The third example shows a dynamic allocation system

where tasks can request additional memory as and when they

need it. The first map shows the initial state with the basic memory ...