Thank you for contacting Intel.
I'll help you further check on this and will update you on our findings.
Really tanks Sandy_Intel.
Meanwhile this issue is solved, I will implement this strategy:
That is supposed to double the speed at least ~300MB/s.
My final expectation is that it reaches ~1000MB/s at least.
I'm waiting, anxiously, to see the answer.
Thanks for sharing your setup here.
The network performance depends on the whole system configuration - hardware, software and settings. With this, we would like to refer you to our website for some suggestions on network adapter performance tuning. You may also check out the Linux documentations under "Related Topics".