F1.4xlarge P2P bandwidth

Hi,

I'm new to AWS FPGA development. I notice that AWS F1.4xlarge (and F1.16xlarge) instances support effective P2P communication between FPGAs, without the help of the host. But the example from Xilinx (https://github.com/Xilinx/Vitis_Accel_Examples/tree/f61637e9263ecc1be3df34182ea6c53a0ca10447/performance/p2p_fpga2fpga_bandwidth) seems not able to work on AWS F1 instances.

I have read the code at https://github.com/awslabs/aws-fpga-app-notes/tree/master/Using-PCIe-Peer2Peer. But how can I evaluate the bandwidth of P2P communication bandwidth concisely? In the code provided, the program just uses sleep(1) to wait until the write is finished. Are there some signals that are triggered when the write is finished?

The result I hope to obtain is a table like the one at https://github.com/awslabs/aws-fpga-app-notes/tree/master/Using-PCIe-Write-Combining. Could you please provide the corresponding script or any useful advice?

Thanks a lot.