Memory Controller Throughput-Based Completion Signal Delay
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Solution Overview
Problem
Memory systems face inefficiencies due to frequent throttling operations, which lead to performance degradation and increased temperatures, as they often output completion signals prematurely, causing overload and necessitating throttling to prevent overheating.
Innovation Solution
A memory controller that adjusts the output of completion signals based on internal throughput, comparing current and requested throughputs to determine when to delay or send the signal, thereby reducing the frequency of throttling operations and maintaining performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the memory controller outputs completion signals promptly without considering internal throughput, then the host can quickly receive acknowledgments and continue operations, but the memory system becomes overloaded and requires frequent throttling operations causing performance degradation and temperature increase
Solution Approach 1:
The memory controller dynamically adjusts the completion signal output timing based on real-time internal throughput conditions. When throughput is high, the controller delays completion signal output to prevent overload; when throughput is low, it outputs signals promptly. This dynamic adaptation resolves the contradiction between fast signal output and sustained productivity.
Solution Approach 2:
The memory controller implements a feedback mechanism by monitoring its internal throughput and using this information to control completion signal output timing. The controller continuously adjusts signal output based on feedback about system load, preventing overload while maintaining optimal performance. This feedback loop eliminates the need for frequent throttling operations.
2Temperature
If the memory controller frequently performs throttling operations to prevent overheating, then the system temperature is controlled, but performance degradation occurs due to reduced operational efficiency
Solution Approach 1:
The memory controller performs preliminary action by proactively delaying completion signal output before the system becomes overloaded. This preventive approach avoids the need for reactive throttling operations that cause performance degradation. By anticipating potential overload conditions and adjusting signal output accordingly, the controller maintains both temperature control and performance.
3Productivity
If the memory controller delays completion signal output to match internal throughput capacity, then throttling operations are reduced and performance is maintained, but the host may experience waiting time increases
Solution Approach 1:
The delay in completion signal output is not fixed but dynamically adjusted based on internal throughput conditions. The controller only delays signals when necessary to match processing capacity, and outputs signals promptly when capacity is available. This dynamic approach minimizes host waiting time while maintaining system productivity.
Data Source
AI summary
There are provided a memory controller and a memory system having the same. The memory controller includes: a command generator configured to generate a command in response to a request received from a host; a throttling manager configured to activate or inactivate a delay signal by comparing a current throughput of data that is being currently processed in a memory system and a request throughput of data that is to be processed in the memory system; and a completion signal output circuit configured to delay an output of a completion signal with respect to the request when the delay signal is activated, and outputs the completion signal when the delay signal is inactivated.