Data access method, apparatus, and system

A method comprising:

• receiving a data copy instruction comprising first source storage addresses, a target data type, and a destination storage address, wherein the first source storage addresses correspond to memory controllers and comprise second source storage addresses corresponding to a first target memory controller of the memory controllers;
• sending, to the first target memory controller, a data request comprising the second source storage addresses and the target data type;
• receiving, from the first target memory controller, a first memory block comprising first data indicated by the second source storage addresses and the target data type, wherein the first memory block is based on a second length of a first cache line in a first memory of the first target memory controller, and wherein a first length of the first memory block is equal to the second length;
• and
• caching the first memory block based on the destination storage address.

A system comprising:

• a processing subsystem configured to:
• receive a data copy instruction comprising first source storage addresses, a target data type, and a destination storage address, wherein the first source storage addresses comprise second source storage addresses;
• send a data request comprising the second source storage addresses and the target data type;
• receive a second memory block comprising first data indicated by the second source storage addresses and the target data type;
• and
• cache the second memory block based on the destination storage address;
• and
• memory controllers corresponding to the first source storage addresses and comprising a first target memory controller, wherein the first target memory controller comprises a first memory, corresponds to the second source storage addresses, and is configured to:
• receive the data request from the processing subsystem;
• read, from the first memory, first memory blocks indicated by the second source storage addresses and the target data type, wherein a first length of the first memory blocks is a first granularity for accessing the first memory;
• extract the first data from the first memory blocks;
• determine a second length of a first cache line in the first memory;
• combine the first data based on the second length to obtain the second memory block, wherein a third length of the second memory block is equal to the second length;
• and
• send the second memory block to the processing subsystem.