System and method for refreshing dynamic random access memory

A dynamic random access memory (DRAM) refresh method, comprising:

• selecting, by a refresh circuit, from a plurality of banks of a DRAM, a candidate bank for refreshing, and triggering, by the refresh circuit, the refresh of the candidate bank,
• wherein when a first set of banks of the plurality of banks is idle and a plurality of accesses are targeted to a second set of banks of the plurality of banks, the DRAM refresh method further comprises (i) determining, by the refresh circuit, a count of accesses targeted to each of the second set of banks, (ii) determining, by the refresh circuit, a plurality of bank-pair distances, with each bank-pair distance indicating a distance between one of the first set of banks and one of the second set of banks, and (iii) selecting, by the refresh circuit, the candidate bank based on the count of accesses targeted to each of the second set of banks and the plurality of bank-pair distances, and
• wherein when at least one access is targeted to each of the plurality of banks, the DRAM refresh method further comprises (i) determining, by the refresh circuit, a count of data accesses targeted to each bank of the plurality of banks, with a type of each data access being same as that scheduled for execution on the DRAM, (ii) determining, by the refresh circuit, a count of parity accesses targeted to each bank of the plurality of banks, and (iii) selecting, by the refresh circuit, the candidate bank based on at least one of a group consisting of the count of data accesses and the count of parity accesses targeted to each bank of the plurality of banks.