A first memory access request is obtained, where the first memory access request is used to request to access a first sub-row in a memory. A to-be-scheduled queue of the memory is searched for a second memory access request, where the to-be-scheduled queue of the memory includes multiple memory access requests, the second memory access request is used to request to access a second sub-row in the memory. The first sub-row and the second sub-row are located in a same row in the memory. The first memory access request and the second memory access request are combined to generate a first activation instruction, where the first activation instruction is used to instruct to activate the first sub-row and the second sub-row in the memory. The first activation instruction is sent to the memory.