Data transfer using f1.x4large

Hi Venkat,

Have you gone through this https://github.com/awslabs/aws-fpga-app-notes/tree/master/Using-PCIe-Peer2Peer for peer-to-peer transfers? The app note also provides recommendations no how to get best performance.

It's a bit unclear to me that you want "... data transfer happens without driver involvement." Are you referring to the DMA driver? Could you elaborate more?

Thanks,

• Chen

Hi Chen,

Thanks for the response.
I have gone through the Using-PCIe_Peer2Peer app note.

Yes, In my question, I was referring to the 'DMA driver' which I don't want to use.

In conventional FPGA implementation, either I would have connected FPGA1 to FPGA2 and then displayed the counters.

If I would like to achieve the same, with using f1.4xlarge instance.
Could you please let me know how to achieve this?

Regards,
Venkat

Hi venkub,

Thank you for the clarification. I need to point out that direct FPGA-to-FPGA connection are not supported by F1. For inter-card communication, you need to use peer-2-peer transaction through PCIe. The link I shared should have all the details needed for BAR4 address exposure, accessing, etc. You don't need to use DMA diver for all that. Please let me know if that answers your questions.

• Chen

Thanks for the response.