Signal Processing Interface Block Transaction Abort Mechanism
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Solution Overview
Problem
Modern signal processing systems face challenges in rapidly aborting a high number of transactions to enable the execution of new tasks in real-time, leading to system performance impacts due to high buffering capacity and multiple outstanding transactions.
Innovation Solution
Implementing a method that pipelines the processing of 'old' tasks by aborting low-priority transactions and executing 'new' tasks, using a dedicated filtering unit to discard pending transactions marked as aborted, and reassigning identifiers to new tasks, allowing for efficient execution of new transactions upon receiving an abort signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the system maintains high buffering capacity and multiple outstanding transactions to improve throughput, then productivity increases, but the ability to rapidly abort transactions and switch to new tasks deteriorates
Solution Approach 1:
The system pre-allocates identifier registers and maintains abort status flags ready in advance. When an abort signal arrives, the interface block can immediately mark transactions as aborted using pre-prepared identifier registers, eliminating the need for sequential processing and enabling instant task switching while maintaining high buffering capacity
Solution Approach 2:
The transaction management is segmented into independent identifier registers, each capable of being independently marked as aborted. This segmentation allows selective abortion of specific transactions without affecting others, enabling rapid task switching while maintaining overall system throughput through parallel transaction handling
2Productivity
If the system processes a high number of pending transactions to improve resource utilization, then productivity increases, but the complexity of managing and aborting these transactions increases
Solution Approach 1:
Each identifier register is self-contained with its own abort status flag and filtering capability. The filtering unit automatically compares incoming transaction identifiers against the abort status flags and discards aborted transactions without requiring complex centralized management logic, reducing overall system complexity while handling numerous pending transactions
Solution Approach 2:
The filtering unit acts as an intermediary between the identifier registers and the transaction processing pipeline. It automatically intercepts and filters out aborted transactions based on identifier comparison, shielding the complex transaction management from the main processing flow and simplifying the overall system architecture
3Productivity
If the system maintains pipeline fullness to improve throughput, then productivity increases, but the ability to discard old tasks and execute new tasks in real-time deteriorates
Solution Approach 1:
The system maintains identifier registers and abort status flags in a ready state within the pipeline, allowing immediate task switching when abort signals arrive. This preliminary preparation enables real-time adaptability without emptying the pipeline, as the filtering mechanism is already in place to handle aborted transactions
Solution Approach 2:
The pipeline maintains dynamic flexibility through individually controllable identifier registers and abort flags. Each transaction identifier can be independently marked for abortion, allowing the pipeline to dynamically adjust and discard specific old tasks while continuing to process other transactions, maintaining fullness and throughput while enabling real-time task switching
Data Source
AI summary
Current tasks being executed in a set of modules of a signal processing system managed via an interface block are aborted so as to permit the execution of new tasks by pipelining eliminating transactions of said current tasks and executing transactions of the new tasks. Upon arrival of a signal to abort the current tasks, data and/or memory accesses present in said interface block are discarded.