10-27-2020 01:49 AM
10-27-2020 09:24 AM
See if the discussion here is relevant to you - https://forums.xilinx.com/t5/Alveo-Accelerator-Cards/U50-XDMA-direct-access/td-p/1156053
We recommend qdma for lower latency, we recommend the ethernet ports for consistent latency as there is high overhead for PCIe. It doesn't look like there is a QDMA shell coming for the U280, you should contact your xilinx marketing or sales rep to see if there are any Ethernet enabled shells.
We recommend transferring data directly to PL ram (instead of offchip on the accelerator card) for reducing latency even further.