Method and system for efficiently swapping pieces into and out of DRAM

摘要

A system and method for managing swaps of pieces of an address mapping table is disclosed. The method may include a controller of a storage device receiving a stream of requests for accesses to the mapping table, analyzing the stream of requests to determine at least one characteristic of the stream of requests, and determining whether to copy a piece of the mapping table stored in non-volatile memory into the volatile memory based on the determined at least one characteristic. The system may include a storage device with a controller configured to perform the method noted above.

主权项

1. In a processor, a method for managing which pieces of a mapping table to store in a volatile memory of a storage device, the method comprising:
receiving a stream of internal requests for accesses to the mapping table; determining a hit rate indicative of a number of times in which the stream of internal requests uses at least a part of the mapping table; determining, based on the hit rate, randomness of the stream of internal requests; and determining whether to copy a piece of the mapping table stored in non-volatile memory into the volatile memory based on the randomness, wherein the stream of internal requests is indicative of internal movement of data within the storage device.