High-Performance Embedded Computing

6.4 Services and Middleware for 361

■ Homogeneous multiprocessor with shared memory—In this case, we can

copy the task’s activation record from the old PE to the new PE and restart

the PE.

■ Heterogeneous multiprocessor with shared memory—We have to assume

that we have versions of the code available that will run on both new and old

PEs. In this case, we cannot simply copy the activation record from one type

of processor to another type. In certain cases, there may be a straightforward

transformation between the activation record information of the two PEs. In

general, we must use specialized code in the processes that will save the task

state in me