PCIe Function Throughput Control via Dynamic Delay
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Solution Overview
Problem
Existing PCIe devices lack a mechanism to dynamically adjust and limit performance for each function, leading to potential bottlenecks and inefficiencies in throughput management.
Innovation Solution
A PCIe device with a throughput calculator, analysis information generator, delay time generator, command lookup table storage, and command fetcher that calculates and manages throughput limits for each function, generating delay times to control command fetch operations based on performance thresholds, ensuring optimal resource allocation and utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If throughput management is implemented for each function, then system efficiency is improved, but device complexity increases
Solution Approach 1:
The patent segments the PCIe device into multiple independent functions (Function 0, Function 1, etc.), each with dedicated throughput calculators, analysis information generators, and command fetchers. This segmentation allows independent throughput management for each function while maintaining overall system efficiency, resolving the contradiction by organizing complexity into manageable modular units.
Solution Approach 2:
The patent implements dynamic throughput adjustment by continuously calculating actual throughput, comparing it with limit information, and dynamically generating delay times based on throughput analysis. This dynamic control mechanism allows the system to adapt throughput management to real-time conditions, improving efficiency without requiring static complex configuration for all scenarios.
2Productivity
If delay time is generated for each function, then throughput optimization is improved, but processing time increases
Solution Approach 1:
The patent applies partial action by generating delay times only for functions that exceed their throughput limits, rather than applying uniform delays to all functions. The throughput calculator identifies which functions need throttling, and the delay time generator applies delays selectively. This approach optimizes throughput for functions that need it while minimizing processing time overhead for functions operating within their limits.
Solution Approach 2:
The patent implements a feedback loop where the throughput calculator continuously monitors actual throughput, compares it with limit information, and feeds this analysis back to the delay time generator. This feedback mechanism ensures that delay times are generated based on real-time throughput conditions, optimizing throughput control while avoiding unnecessary delays when throughput is already within acceptable ranges.
3Measurement precision
If throughput limit comparison is performed for each function, then performance control precision is improved, but computational load increases
Solution Approach 1:
The patent divides the throughput management task into separate throughput calculators for each function, with each calculator responsible for a specific function's throughput calculation and comparison. This segmentation distributes the computational load across multiple independent units rather than requiring one complex centralized processor, reducing the computational burden on any single component while maintaining precise per-function control.
Solution Approach 2:
Each function's throughput calculator autonomously performs its own throughput calculation, comparison with limit information, and triggers delay time generation independently without requiring centralized coordination. This self-service approach reduces the overall computational coordination overhead while maintaining precise performance control for each function, as each unit manages its own resource allocation decisions.
Data Source
AI summary
A PCIe device and a method of operating the same are provided. The PCIe device may include a throughput calculator configured to calculate a throughput of each of a plurality of functions, a throughput analysis information generator configured to generate throughput analysis information indicating a result of a comparison between a throughput limit and the calculated throughput, a delay time information generator configured to generate a delay time for delaying a command fetch operation for each function based on the throughput analysis information, a command lookup table storage configured to store command-related information and a delay time of a function corresponding to a target command, the command-related information including information related to the target command to be fetched from a host, and a command fetcher configured to fetch the target command based on the command-related information and the delay time of the corresponding function.