Memory Controller Temperature Compensation for DRAM Timing
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Solution Overview
Problem
Dynamic random access memory (DRAM) performance is degraded due to increased write recovery time at lower temperatures, leading to higher bit error rates and reduced memory bandwidth, making it challenging to maintain optimal timing parameters across varying temperatures.
Innovation Solution
An information handling system that includes a processor and a memory system configured to determine the temperature and initiate remedial actions to maintain the temperature above a minimum threshold, using self-heating systems and temperature sensors to optimize timing parameters and prevent performance degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If write recovery parameter is increased to reduce bit error rate, then reliability is improved, but memory bandwidth deteriorates
Solution Approach 1:
The patent implements dynamic adjustment of write recovery timing parameters based on real-time temperature sensing. The memory controller monitors temperature and adjusts timing parameters dynamically, allowing optimal performance across varying thermal conditions without sacrificing reliability or bandwidth permanently.
Solution Approach 2:
The system changes timing parameters as a function of operating temperature. At different temperature ranges, different write recovery parameter values are applied, optimizing both reliability and bandwidth for each thermal condition rather than using a fixed conservative value.
2Reliability
If write recovery parameter is increased to ensure full charge, then reliability is improved, but write latency increases
Solution Approach 1:
The patent implements dynamic adjustment of write recovery timing parameters based on real-time temperature sensing. The memory controller monitors temperature and adjusts timing parameters dynamically, allowing optimal performance across varying thermal conditions without sacrificing reliability or bandwidth permanently.
Solution Approach 2:
The system changes timing parameters as a function of operating temperature. At different temperature ranges, different write recovery parameter values are applied, optimizing both reliability and bandwidth for each thermal condition rather than using a fixed conservative value.
3Productivity
If temperature-based timing parameters are implemented, then performance at high temperature is improved, but write latency triples at low temperature
Solution Approach 1:
Instead of reducing timing parameters at low temperature (which would cause write failures), the patent inverts the approach by using temperature-compensated timing that maintains appropriate margins across all temperatures. The system adjusts timing based on temperature in a way that prevents both write failures and excessive latency variation.
Solution Approach 2:
The system changes timing parameters as a function of operating temperature. At different temperature ranges, different write recovery parameter values are applied, optimizing both reliability and bandwidth for each thermal condition rather than using a fixed conservative value.
4Reliability
If variable memory latency is introduced for temperature compensation, then reliability is improved, but program performance deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the memory controller monitors temperature and dynamically adjusts timing parameters to maintain consistent performance. This feedback loop compensates for temperature variations automatically, preventing both write failures and timing-related program issues.
Solution Approach 2:
The system changes timing parameters as a function of operating temperature. At different temperature ranges, different write recovery parameter values are applied, optimizing both reliability and bandwidth for each thermal condition rather than using a fixed conservative value.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively maintains optimal memory performance by ensuring that timing parameters remain efficient, reducing write latency and bandwidth issues associated with temperature fluctuations, thereby enhancing overall memory device performance.
Implementation Method 1
initiate one or more remedial actions to increase the temperature above the minimum threshold temperature
Implementation Method 2
determine a temperature associated with the memory system
Data Source
AI summary
In accordance with embodiments of the present disclosure, a memory system may include one or more memory modules and a memory controller communicatively coupled to one or more memory modules. The memory controller may be configured to determine a temperature associated with the memory system and determine if the temperature is below a minimum threshold temperature, wherein the minimum threshold temperature is a predetermined margin greater than a critical temperature below which one or more timing parameters of the memory system are of greater durations than they are when the temperature is above the critical temperature, and further wherein the predetermined margin is zero or greater. The memory controller may also be configured to initiate one or more remedial actions to increase the temperature above the minimum threshold temperature if the temperature is below the minimum threshold temperature.