pcie endpoint vnet speed too low

I have tested pcie vnet function. Two xavier can communicate by vnet.
The software version is L4T JAX and TX2 R32.2.1 Sources.
But I find the speed is about 12MB/ses.
I want to know how to improve the speed of this communication.
If we can not improve the speed ,do you have any other method of high speed communication like pcie or type C between two xavier?

Thank you!

Hi Jason_888,

Have you maximized the Xavier performance first?

sudo nvpmodel -m 0
sudo jetson_clocks