Linux Patch Improves NVMe Performance by 15% with CPU Cluster-Aware Handling
Intel Linux engineers have developed a pending patch aimed at significantly improving NVMe storage performance on high core count processors. The optimization targets situations where multiple CPUs share NVMe Interrupt Request (IRQ) lines, leading to potential performance penalties if IRQ affinity and the CPU's cluster do not align optimally. By implementing CPU cluster-aware handling for NVMe IRQs, the patch addresses these inefficiencies. Early testing with the pending patch has demonstrated a reported 15% performance improvement, which is crucial for systems leveraging modern multi-core architectures to maximize I/O throughput and overall system responsiveness.