What are the recommendations for 10 Gigabit network adapter tuning parameters? - Red Hat Customer Portal

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Issue

What are the recommendations for 10 Gigabit network adapter tuning parameters?
10Gbit NIC with MTU of 9000. Testing using iperf between two systems only results in 6-7 gigabits/s transfer speed.
What are the expected and recommended tuning parameters to configure to achieve 10Gbps connection wirespeed for streaming bulk transfers?

Environment

Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 5
10 Gigabit Ethernet network interface adapters (10GbE)

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