Techniques for probabilistic dynamic random access memory row repair

摘要

Examples are disclosed for probabilistic dynamic random access memory (DRAM) row repair. In some examples, using a row hammer limit for DRAM and a maximum activation rate for the DRAM a probabilistic row hammer detection value may be determined. The probabilistic row hammer detection value may then be used such that a probability is acceptably low that a given activation to an aggressor row of the DRAM causes the row hammer limit to be exceeded before a scheduled row refresh is performed on one or more victim rows associated with the aggressor row. Other examples are described and claimed.

主权项

1. An apparatus comprising:
logic for a memory controller, at least a portion of the logic in hardware, the logic to:
receive information to indicate a row hammer limit for dynamic random access memory (DRAM) having a given activate rate to rows for the DRAM;determine a row hammer detection value that selects an activation to an aggressor row of the DRAM rows that causes a pseudo targeted row refresh (pTRR) to one or more victim rows of the DRAM rows associated with the aggressor row based on a first probability that the activation causes the row hammer limit to be exceeded for the aggressor row before a scheduled row refresh is performed on the one or more victim rows;cause a random number to be generated following a first activation to a first aggressor row;decrement the random number for each subsequent activation to any aggressor rows until the random number is decremented to zero;select the first activation to the first aggressor row based on the first activation being the subsequent activation that caused the random number to be decremented to zero; andcause a first pTRR to be sent to one or more victim rows associated with the first aggressor row.