Interrupt Routing Structure Bypass Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing queued interrupt models in computer systems introduce additional latency for certain interrupts, and existing methods to bypass these models are complex, require extensive code changes, or limit the interrupts' usefulness for other purposes.
Innovation Solution
A method that registers an interrupt handler within an interrupt routing structure and executes it directly when a queuing bypass flag is set, bypassing the interrupt queueing mechanism, allowing for efficient handling of high-priority interrupts without queuing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If interrupts are queued prior to servicing, then interrupt handling is organized and managed, but additional latency is introduced
Solution Approach 1:
The interrupt handling system dynamically adapts its behavior based on the state of the bypass flag. When the bypass flag is clear, interrupts are queued normally for organized handling. When the bypass flag is set, the system dynamically switches to direct execution mode, eliminating the queueing delay and reducing latency for time-critical interrupts.
Solution Approach 2:
The bypass flag acts as a parameter that changes the operational mode of the interrupt handling system. By setting or clearing this flag, the system transitions between two states: queued handling (for normal organization) and direct execution (for low-latency requirements), thus resolving the contradiction between organization and speed.
2Loss of time
If existing methods are used to bypass interrupt queueing, then latency is reduced, but extensive code changes are required
Solution Approach 1:
The bypass functionality is extracted as a separate, independent mechanism controlled by the bypass flag. This allows the bypass capability to be added without modifying the core interrupt queueing code, minimizing code changes while still achieving latency reduction when needed.
Solution Approach 2:
The bypass flag serves as an intermediary that mediates between the interrupt source and the handling mechanism. It provides a simple interface to switch between queued and direct execution modes without requiring complex modifications to existing code, thus reducing latency while maintaining code simplicity.
3Loss of time
If existing methods are used to bypass interrupt queueing, then direct execution is achieved, but interrupt usefulness for other purposes is limited
Solution Approach 1:
The bypass flag mechanism provides multi-functionality: it enables both normal queued interrupt handling and direct execution modes within the same system. This universal approach allows interrupts to serve multiple purposes - time-critical operations can use direct execution while other operations benefit from organized queueing, thus maintaining versatility while achieving latency reduction when needed.
Data Source
AI summary
Within an interrupt routing structure, an interrupt handler is registered, the registering comprising storing a pointer to the interrupt handler in the interrupt routing structure. Responsive to determining that a received interrupt comprises a queuing bypass flag in a set state, the interrupt handler is executed, the executing bypassing an interrupt queueing mechanism.