Bandwidth Control Circuit for FPGA Bus Arbitration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current bandwidth arbitration and allocation methods for computers using Field Programmable Gate Arrays (FPGAs) and other programmable logic devices are inadequate, leading to suboptimal performance due to bus conflicts and inefficient resource utilization, especially when multiple accelerators operate simultaneously.
Innovation Solution
A bandwidth control circuit with monitoring and management units that dynamically adjust bus usage by tracking operating periods and average bandwidth usage of each circuit block, allowing for optimal allocation and limitation of bandwidth to ensure efficient resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If fixed bandwidth allocation is used for accelerators, then arbitration is simple, but bus bandwidth utilization becomes inefficient when multiple accelerators operate simultaneously
Solution Approach 1:
The patent implements dynamic bandwidth allocation by introducing a bandwidth monitor that continuously measures actual bus usage of each accelerator and a bandwidth limiter that adjusts allocation in real-time based on monitored data, replacing static fixed allocation with adaptive dynamic control to optimize bus bandwidth utilization
Solution Approach 2:
The system establishes a feedback loop where the bandwidth monitor continuously observes accelerator bus usage and feeds this information to the bandwidth limiter, which then adjusts bandwidth allocation accordingly, creating a closed-loop control system that adapts to changing workload conditions
2Ease of operation
If bandwidth is allocated based on predetermined properties, then allocation is straightforward, but it cannot adapt to changing application requirements and bottlenecks
Solution Approach 1:
The system performs preliminary bandwidth allocation based on accelerator properties, then continuously monitors actual usage and dynamically adjusts allocation when bottlenecks are detected, combining initial straightforward allocation with subsequent adaptive optimization
Solution Approach 2:
The bandwidth monitor and limiter enable the system to self-adjust bandwidth allocation by automatically detecting bottlenecks through monitoring and reallocating resources without external intervention, allowing the system to adapt to changing requirements autonomously
3Speed
If priority is given to a specified accelerator, then processing time bottleneck is resolved, but other applications may suffer from unnecessary bandwidth limitation
Solution Approach 1:
The bandwidth limiter applies differentiated bandwidth allocation to different accelerators based on real-time monitoring data, giving priority bandwidth to specific accelerators that are identified as bottlenecks while maintaining adequate bandwidth for others, rather than applying uniform limitation
Solution Approach 2:
The system dynamically changes bandwidth allocation parameters based on monitored performance data, adjusting the bandwidth limits of individual accelerators according to their actual usage patterns and system bottleneck conditions, allowing flexible optimization of both speed and throughput
Data Source
AI summary
A bandwidth control circuit includes bandwidth control units and a management unit to control each of the bandwidth control units. Each bandwidth control unit includes: a bandwidth monitor unit to monitor a bus usage bandwidth of each of the plurality of the circuit blocks; an operating period observation unit to monitor a start and an end of an operating period of each of the plurality of the circuit blocks; and a limit unit to be enabled to limit the bus usage bandwidth of each of the plurality of the circuit blocks. The management unit limits the bus usage bandwidth, corresponding to a bus average usage bandwidth and the operating period of each of the plurality of the circuit blocks.