Effective dram interleaving for asymmetric size channels or ranks while supporting improved partial array self-refresh

Abstract

Various embodiments include methods and devices for portion interleaving for asymmetric size memory portions. Embodiments may include determining an asymmetric memory portion assignment for an interleave unit, determining a consumed address space offset for consumed address space of a memory, modifying an address of the interleave unit using the consumed address space offset, and assigning the interleave unit to an interleave granule in the asymmetric memory portion using the modified address in a compact manner before assigning another interleave unit to another interleave granule. Embodiments may include receiving an address of memory access request in a memory, mapping the address to an interleave granule in an asymmetric memory portion, assigning consecutive interleave units to the interleave granule while the interleave granule has unused space before assigning another interleave unit to another interleave granule, and implementing the memory access request at the mapped address.