18204786. ROW HAMMER MITIGATION USING HIERARCHICAL DETECTORS simplified abstract (Micron Technology, Inc.)
ROW HAMMER MITIGATION USING HIERARCHICAL DETECTORS
Organization Name
Inventor(s)
Edmund J. Gieske of Cedar Park TX (US)
Cagdas Dirik of Indianola WA (US)
Robert M. Walker of Raleigh NC (US)
ROW HAMMER MITIGATION USING HIERARCHICAL DETECTORS - A simplified explanation of the abstract
This abstract first appeared for US patent application 18204786 titled 'ROW HAMMER MITIGATION USING HIERARCHICAL DETECTORS
Simplified Explanation
The abstract describes an apparatus that includes memory devices and a controller. The controller has row hammer detection circuitry that receives signaling for a row activation command with a row address. It increments a row counter corresponding to the row address stored in a data structure and determines if the incremented row counter exceeds a row hammer threshold. If it does, the controller issues a row hammer mitigation command to mitigate row hammer.
- The apparatus includes memory devices and a controller.
- The controller has row hammer detection circuitry.
- The row hammer detection circuitry receives signaling for a row activation command with a row address.
- The row counter corresponding to the row address is incremented and stored in a data structure.
- The incremented row counter is compared to a row hammer threshold.
- If the incremented row counter exceeds the threshold, a row hammer mitigation command is issued.
Potential Applications
- This technology can be applied in computer systems that use memory devices.
- It can be used in servers, data centers, and other computing environments where memory performance and reliability are crucial.
Problems Solved
- Row hammer is a phenomenon where repeated accesses to a row of memory cells can cause bit flips in adjacent rows, leading to data corruption and system instability.
- This technology solves the problem of row hammer by detecting and mitigating the effects of repeated row activations.
Benefits
- By detecting and mitigating row hammer, this technology improves the reliability and stability of memory systems.
- It helps prevent data corruption and system crashes caused by row hammer.
- The mitigation commands issued by the controller can help extend the lifespan of memory devices by reducing the wear and tear caused by row hammer.
Original Abstract Submitted
An apparatus can include a number of memory devices and a controller coupled to one or more of the number of memory devices. The controller can include row hammer detection circuitry configured to receive signaling indicative of a row activation command having a row address, increment a row counter corresponding to the row address stored in a stored in a data structure in a register or storage device, determine whether the incremented row counter is greater than a row hammer threshold, and issue a row hammer mitigation command to mitigate row hammer.
