MEMORY ACCESSING METHOD, STORAGE-CLASS MEMORY, AND COMPUTER SYSTEM

摘要

A memory accessing method, a storage-class memory (50), and a computer system (100). The computer system (100) comprises a memory controller (20) and a hybrid memory. The hybrid memory comprises a dynamic random access memory (DRAM) (40) and the storage-class memory (SCM) (50). The memory controller (20) is used for sending a first access instruction to the DRAM (40) and the SCM (50). When the SCM (50) determines that a first storage unit set of the DRAM (40) pointed by a first address in the received first access instruction comprises a storage unit of which the retention time is shorter than a refresh period of the DRAM (40), the SCM (50) can acquire a second address having a mapping relationship with the first address. Furthermore, the SCM (50) converts, according to the second address, the first access instruction into a second access instruction for accessing the SCM (50), so as to access the SCM (50). The computer system (100) can ensure the correctness of data on the basis of reducing refresh power consumption of the DRAM (40).