Critical Register State Extraction for Faster Live Migration
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Solution Overview
Problem
Integrated circuits face inefficiencies in managing and transferring register states during debugging, retiming, and live migration due to the need to exhaustively monitor or transfer all register states, which is time-consuming and inefficient.
Innovation Solution
Implementing access circuitry that selectively extracts and loads critical register states using synthesis directives, multiplexing circuits, scan chain circuitry, memory-mapped interfaces, debugging fabric, finite state machines, or external memory to target only critical registers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all register states are monitored and transferred during live migration, then complete state preservation is achieved, but processing time and efficiency deteriorate significantly
Solution Approach 1:
The patent extracts only the critical register states from the complete register set and transfers these selected states during live migration. The extraction mechanism identifies and transfers only essential state information rather than all register contents, thereby reducing transfer time while maintaining necessary state preservation for functional continuity.
Solution Approach 2:
The patent segments register states into critical and non-critical categories. By dividing the complete register state space into essential and non-essential portions, the system can selectively transfer only the critical segment during migration operations, significantly reducing processing time while maintaining reliability for state preservation.
2Reliability
If all register states are transferred during live migration, then complete state transfer is achieved, but routing complexity and processing overhead increase
Solution Approach 1:
The patent extracts only critical register states for transfer during live migration. By identifying and extracting only the essential state information rather than all register contents, the routing infrastructure handles a reduced subset of data, thereby lowering routing complexity and processing overhead while maintaining necessary state transfer completeness.
Solution Approach 2:
The patent segments the register state transfer process into identification of critical registers, extraction of critical states, and selective transfer. This segmentation allows the routing system to operate on a divided and managed subset of data rather than the complete register state space, reducing overall routing complexity.
3Measurement precision
If exhaustive monitoring of all register states is performed during debugging, then complete debugging coverage is achieved, but time consumption increases significantly
Solution Approach 1:
The patent extracts only critical register states for monitoring during debugging operations. Instead of exhaustively monitoring all register states, the system identifies and monitors only the essential critical registers, thereby reducing debugging time while maintaining adequate debugging coverage for identifying and resolving issues.
Solution Approach 2:
The patent segments register monitoring into critical and non-critical categories. By focusing monitoring resources on the critical segment of registers that actually impact system behavior, the debugging process achieves sufficient coverage without the time penalty of exhaustive monitoring of all registers.
Data Source
AI summary
Integrated circuits may include registers that store register states. Only a subset of the registers may store critical register states. The subset of registers may be specially demarcated, such as using synthesis directions in the hardware description, and may be coupled to dedicated extraction/loading circuitry. The extraction/loading circuitry may be implemented using soft or hard logic or can leverage existing programming or debugging circuitry on a programmable integrated circuit. The extraction/loading mechanism may also be implemented using multiplexers and associated control circuitry, scan chain circuitry, a memory-mapped interface, a tool-instantiated or user-instantiated finite state machine, or external memory interface logic. Accessing critical register states in this way can help improve efficiency with live migration events, debugging, retiming, and other integrated circuit operations.