Dynamic CPU Core Assignment for Storage I/O Latency

The patent implements dynamic core assignment where the system continuously monitors CPU core utilization and adjusts task distribution in real-time. Background tasks are dynamically migrated between cores based on current load conditions, and host I/O tasks are selectively assigned to cores with lower background task counts. This dynamic adaptation resolves the contradiction by allowing high background processing throughput when cores are available, while automatically reducing background task concentration on cores handling host I/O, thus preventing latency increases.

The patent segments the core selection process into two independent but coordinated components: background task assignment and host I/O task assignment. Background tasks are assigned to available cores without restriction, while host I/O tasks are assigned to cores based on a separate criterion (selecting cores running fewer background tasks). This segmentation allows the system to maintain flexibility in background task distribution while ensuring host I/O tasks receive preferential treatment, resolving the contradiction between resource contention reduction and system flexibility.

The patent applies local quality by creating different assignment rules for different task types on different cores. Instead of uniform treatment, host I/O tasks are selectively assigned to cores with favorable conditions (fewer background tasks), while background tasks are assigned more freely. This local differentiation ensures that specific cores become temporarily dedicated to host I/O processing when needed, maintaining high reliability without preventing overall high CPU utilization across the system.