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

摘要

Embodiments of the present invention provide a memory access method, a storage-class memory, and a computer system. The computer system includes a memory controller and a hybrid memory, and the hybrid memory includes a dynamic random access memory DRAM and a storage-class memory SCM. The memory controller is configured to send a first access instruction to the DRAM and the SCM. When determining that a first memory cell set that is of the DRAM and to which a first address in the received first access instruction points includes a memory cell whose retention time is shorter than a refresh cycle of the DRAM, the SCM may obtain a second address having a mapping relationship with the first address. Further, the SCM converts, according to the second address, the first access instruction into a second access instruction for accessing the SCM, to implement access to the SCM. The computer system provided in the embodiments of the present invention can ensure correctness of data while reducing power consumption for DRAM refresh.