Memory Command Execution With Parallel EDC and Delayed Writes
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Solution Overview
Problem
Conventional memory systems face bottlenecks in data throughput due to the sequential execution of commands following error detection and correction (EDC) operations, which can lead to reduced performance and increased latency, especially at high clock speeds.
Innovation Solution
Implementing a method where commands are decoded and executed in parallel with EDC operations, allowing immediate execution of non-write operations and delaying write operations until EDC verification is complete, thereby reducing command execution latency and maintaining data integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If commands are executed sequentially after EDC operations, then data integrity is ensured, but data throughput is reduced and command execution latency increases
Solution Approach 1:
The patent dynamically adjusts the execution timing of commands based on their type. Non-write commands are executed immediately without waiting for EDC verification, while write commands are delayed until EDC verification completes. This dynamic approach optimizes throughput for read operations while maintaining data integrity for write operations.
Solution Approach 2:
The patent segments command handling into two distinct paths: one for non-write commands that bypass EDC verification for immediate execution, and another for write commands that wait for EDC verification. This segmentation allows different handling strategies for different command types, improving overall system throughput while maintaining necessary reliability.
2Reliability
If write operations are delayed until EDC verification is complete, then data integrity is maintained, but command execution latency increases
Solution Approach 1:
The patent applies different quality requirements to different command types. Write commands require full EDC verification before execution to ensure data integrity, while non-write commands can be executed immediately without such verification. This localized application of verification requirements minimizes unnecessary delays while maintaining integrity where critical.
3Productivity
If parallel decoding and execution of commands is implemented, then data throughput is enhanced, but the complexity of command handling increases
Solution Approach 1:
The patent uses dynamic control logic that determines execution timing based on command type. The system automatically adjusts whether to wait for EDC verification or execute immediately based on whether the command is a write or non-write operation, managing complexity through adaptive control rather than rigid sequential processing.
Solution Approach 2:
The patent introduces a command analysis mechanism that acts as an intermediary between command reception and execution. This intermediary analyzes the command type and routes it to the appropriate execution path, managing the complexity of parallel handling through structured decision logic that simplifies the overall control flow.
Data Source
AI summary
A memory system including a memory controller and a memory and a related method are disclosed. The method includes communicating a command and error detection/correction (EDC) data associated with the command from the memory controller to the memory, decoding the command and executing an EDC operation related to the EDC data in parallel, and if the command is a write command, delaying execution of a write operation indicated by the write command until completion of the EDC operation, else immediately executing an operation indicated by the command without regard to completion of the EDC operation.