Hi,

I am facing issue with performance of 10 Gigabit Ethernet.

Environment 2 hosts each:
- 2 * Intel(R) Xeon(R) CPU E5-2690 v2
- Intel 82599ES 10Gb Ethernet
- 128GB RAM

System:
- Centos 6.5 delivered by fuel 6.0

iperf during test of network performance over single stream report
2,5-3Gbps (when using 4+ connection, cumulative transfer can hit over
9Gbps)

For comparison, same test was run on official Centos 6.5 with result at
minimum 9,3 Gbps

In both cases default MTU 1500 was set.

>From my analyses it looks like something is limiting i/o performance per
stream.

Are you aware of this issue, and can you comment on it?

This is critical for our deployment.

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