384 Power Systems Enterprise Servers with PowerVM Virtualization and RAS
Address translation
Applications that are running on AIX, 32-bit or 64-bit, have their own address space starting
from address 0 to the highest possible address. Shared segments, such as the shared library
segment, are mapped into the address space of the application.
When an application accesses memory, the effective address that is used by the application
is translated into a real memory address. The effective-to-real-address translation is done by
the processor, which maintains an effective-to-real-address (ERAT) translation table. When a
processor does not have the necessary information for the address translation, it tries to walk
the page frame table and access the ...