QLogic 2600 Series Hyper-V Virtual Server Engine - Manual (Page 10)

Testing with Iometer showed the performance of competitive products was identical at real-world 4k, 8k, and 16k block sizes.
However, the QLogic QLE2672 used up to 23 percent less CPU processing power to do the same work.
Performance with Gen 5 Fibre Channel
QLE2672
Testing by QLogic shows the QLE2672 Gen 5 Fibre Channel Adapter
delivers high IOPS with Microsoft Windows Server 2012 and
requires significantly less CPU utilization than competitive products.
Real-World Performance and CPU Efficiency
When used with a high-efficiency Gen 5 Fibre Channel Adapter, Hyper-V with VHDX can provide even larger
performance advantages. In testing performed by QLogic, the QLogic QLE2672 Gen 5 Fibre Channel Adapter
delivered the same IOPS performance using real-world 4KB and 8KB block sizes for dual-port adapters as the
nearest competitor—with 23 percent less CPU utilization. This frees CPU cycles for VMs and their
workloads, which is critical for Tier-1 applications or in dense VM environments.
CPU % - Dual Port, 100% Reads IOPS - Dual Port, 100% Reads
IOPS Performance and CPU Utilization with Gen 5 Fibre Channel Adapters