Dynamic Interrupt Rate Adjustment for Packet Processing Efficiency
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Solution Overview
Problem
Existing methods for determining interrupt rates in operating systems are narrowly tailored for specific computing capacities and fail to adapt to different hosts, leading to suboptimal CPU utilization and throughput in varying environments.
Innovation Solution
The approach involves polling device drivers for statistical data to dynamically determine and adjust the interrupt rate based on current computing capacity, leveraging packet processing efficiency to throttle interrupts and optimize CPU utilization across different hardware environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed interrupt rate is used based on specific computing capacity, then CPU overhead is reduced for that specific host, but the system cannot adapt to different hosts with different computing capacities
Solution Approach 1:
The patent implements dynamic interrupt rate adjustment by continuously monitoring packet processing efficiency and adapting the interrupt rate based on current system conditions. The interrupt rate is no longer fixed but dynamically modified based on measured performance metrics, allowing the system to adapt to different hosts and workloads automatically
Solution Approach 2:
The system employs feedback mechanisms by measuring packet processing efficiency and using this information to adjust the interrupt rate. The measured efficiency feeds back into the interrupt rate determination logic, creating a closed-loop control system that automatically optimizes performance based on actual system conditions
2Productivity
If interrupt rate is increased to improve throughput, then data throughput improves, but CPU overhead increases
Solution Approach 1:
The patent changes the parameter of interrupt rate based on measured packet processing efficiency. By adjusting this critical parameter dynamically, the system optimizes the balance between throughput and CPU overhead, achieving high productivity when efficiency is low and reducing overhead when efficiency is high
Solution Approach 2:
The system dynamically adjusts the interrupt rate based on real-time measurements of packet processing efficiency. This dynamic adaptation allows the system to respond to changing workload conditions, maintaining optimal throughput while minimizing CPU overhead across varying operating conditions
3Use of energy by moving object
If interrupt rate is decreased to reduce CPU overhead, then CPU utilization improves, but data throughput may be compromised
Solution Approach 1:
The system adjusts the interrupt rate parameter based on measured packet processing efficiency to optimize the trade-off between CPU overhead and throughput. When processing efficiency is high, a lower interrupt rate maintains throughput while reducing overhead; when efficiency is low, the interrupt rate increases to preserve throughput
Solution Approach 2:
The dynamic adjustment of interrupt rate based on real-time efficiency measurements enables the system to maintain optimal performance across different operating conditions, automatically balancing CPU overhead reduction with throughput preservation
Data Source
AI summary
Interrupt rate determination can include instructions to determine a quantity of instances of packet processing by an operating system during a first period of time, each instance corresponding to a particular interrupt request sent by a device, determine a quantity of bytes processed during the first period of time by the operating system, determine a speed of the device, determine a first interrupt rate to assign to the device for a second period of time based on the quantity of instances, the quantity of bytes processed, and the speed of the device during the first period of time, and set the interrupt rate to the device.