Jetson AGX , ConnextX-6 Dx, DPDK performance issue

I would like to understand what is the maximum performance is expected in Jetson AGX, ConnextX-6 DX and DPDK setup.
ConnextX-6 DX is installed in to PCIe slot.
Right now I got 40Gbps, when traffic is: one directional, packet size 8K, no memory copy.
In a case two ConnextX ports are receiving and two DPDK tasks(one per port) assigned to different LCOREs the performance is divided 20Gb/20Gb per LCORE.
There are no interrupts during the test.
It sounds as DRAM paging issue(hugepage…).

Could someone provide directives how to improve the performance?

Thanks in advance

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