Operating Systems - David Vernon

Memory Management
Virtual Memory
– In most paging schemes, the page tables are
kept in memory (rather than in registers)
– This means that a single logical memory
access may require several additional
memory accesses (to the page tables and to
the final physical page frame)
– This applies both to instruction fetches and
data movements
– The impact on the execution performance
can be very Copyright significant © 2007 David Vernon (www.vernon.eu) (e.g. 25% of full capacity)