Dynamic Register Block Routing for Processor Latency Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In modern data processing systems, the imbalance in utilization of register blocks or banks within a processor can lead to stalls and increased latency, as some blocks become overloaded while others remain underutilized.
Innovation Solution
A method is introduced to dynamically balance the utilization of register blocks by calculating the utilization rate of each block and routing instructions to write their results to blocks with lower utilization, thereby preventing overloading and improving processor performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If instructions are routed to register blocks without considering utilization rate, then routing is simple and fast, but register blocks become imbalanced leading to stalls and increased latency
Solution Approach 1:
The system dynamically adjusts instruction routing decisions based on real-time register block utilization rates. The routing mechanism transitions from static to dynamic by continuously monitoring utilization metrics and adapting routing paths accordingly, allowing the system to respond to changing workload conditions and prevent register block overflow stalls
Solution Approach 2:
The system implements a feedback mechanism where utilization rates of register blocks are continuously monitored and fed back to the routing logic. This feedback loop enables the routing mechanism to make informed decisions about instruction destination selection, preventing overload of specific register blocks by redirecting instructions to underutilized blocks when detected
2Loss of time
If instructions are routed to balance register block utilization, then latency is reduced and performance improves, but routing complexity increases
Solution Approach 1:
The register file is segmented into multiple independent register blocks, each with its own utilization tracking. This segmentation allows the routing mechanism to make granular decisions about instruction destination selection, managing complexity by treating each block independently rather than managing the entire register file as a single unit
Solution Approach 2:
The system performs preliminary calculation of utilization rates before making routing decisions. By pre-computing utilization metrics and having routing logic ready to query these pre-calculated values, the system avoids complex real-time analysis during instruction routing, thereby reducing actual routing complexity while maintaining load balancing effectiveness
Data Source
AI summary
A system, processor, programming product and/or method for assigning instructions to destination register file blocks, and/or routing instructions, includes: providing a processing pipeline having two or more execution units configured to process instructions; providing a register file having register file entries configured to hold data, where the register file is subdivided into a plurality of register blocks and each register block has two or more register file entries; calculating a utilization rate for one or more register blocks; and assigning and/or routing an instruction to write its results to a register block based upon the utilization rate for that register block. Preferably the execution unit is configured to write its results to a single specific destination (rename) register block.