Memory Access Scheduler for Bank Pre-Opening
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Solution Overview
Problem
In multi-bank memory systems, existing technologies face inefficiencies in managing memory access times and power consumption due to the need to constantly open and close banks and bank pages, leading to overhead and suboptimal bus utilization.
Innovation Solution
A memory access scheduler component predicts access patterns and pre-opens banks and bank pages before they are needed, reducing overhead and improving bus usage by issuing activation requests ahead of time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If banks are opened and closed on demand for each memory access, then memory access flexibility is improved, but overhead and access time increase
Solution Approach 1:
The memory controller predicts future memory access patterns and pre-opens bank pages before they are actually needed. By analyzing historical access patterns, the controller proactively activates banks in advance, eliminating the latency that would otherwise occur when banks need to be opened on-demand for each access operation.
Solution Approach 2:
The system dynamically adjusts bank management strategies based on observed access patterns. The memory controller continuously monitors and adapts its predictions, switching between different bank opening strategies based on the specific access pattern being exhibited, thereby optimizing performance for different workloads.
2Speed
If banks are frequently opened and closed, then memory access responsiveness is improved, but power consumption increases
Solution Approach 1:
By pre-opening banks based on predicted access patterns, the system avoids the need to frequently open and close banks in response to each access request. This reduces the number of bank state transitions, thereby lowering power consumption while maintaining responsive access times.
Solution Approach 2:
The memory controller maintains banks in an active state longer by predicting future accesses, thereby reducing the frequency of bank opening/closing operations. This continuous utilization strategy reduces the overhead associated with repeated bank activation, lowering overall power consumption.
3Loss of time
If memory accesses are processed immediately upon request, then response time is improved, but bus utilization decreases
Solution Approach 1:
The memory controller issues bank activation requests in advance based on predicted access patterns, allowing bus operations to be better scheduled and utilized. By proactively managing bank states, the controller can batch operations and improve bus utilization without compromising the timing of actual data accesses.
Data Source
AI summary
Systems and methods are provided that facilitate memory storage in a multi-bank memory device. The system contains a memory controller and a memory array communicatively coupled to the memory controller. The memory controller sends commands to the memory array and the memory array updates or retrieves data contained therein based upon the command. If the memory controller detects a pattern of memory requests, the memory controller can issue a preemptive activation request to the memory array. Accordingly, memory access overhead is reduced.