Row hammer telemetry

A method comprising:

• receiving, at a memory controller of a memory sub-system, signaling indicative of an amount of row activations directed to a row of a memory device of the memory sub-system over a first time period and a second time period;
• incrementing over the first time period:
• a row counter in a first data structure;
• and
• a refresh counter from a first value to a second value, wherein the second value represents quantities of directed refresh management (dRFM) commands issued by the first data structure via a respective channel to memory banks of the memory device;
• incrementing over the second time period:
• a row counter in a second data structure;
• and
• the refresh counter from the second value to a third value, wherein the third value represents the respective quantity of dRFM commands issued by the first data structure and a quantity of dRFM commands issued by the second data structure via the respective channel to the memory banks of the memory device;
• determining a value of the refresh counter exceeds a refresh threshold;
• and
• responsive to the determination that the refresh threshold is exceeded, correlating the determination that the refresh threshold is exceeded to an error in the memory sub-system.

An apparatus, comprising:

• a number of memory devices;
• and
• a memory controller coupled to one or more of the number of memory devices, the memory controller including a row hammer detector and being configured to:
• increment for a first time period:
• a row counter in a first data structure;
• and
• a first refresh counter to represent a quantity of directed refresh management (dRFM) commands issued by the first data structure to a memory bank during the first time period;
• increment for a second time period:
• a row counter in a second data structure;
• and
• a second refresh counter to represent a quantity of dRFM commands issued by the second data structure to the memory bank during the second time period;
• determine that an incremented value of the first refresh counter or an incremented value of the second refresh counter exceeds a refresh threshold;
• and
• responsive to the determination that the refresh threshold is exceeded, correlate the determination that the refresh threshold is exceeded to an error in the number of memory devices.