U200 packet receiving performance test

[beer-belly]

U200 packet receiving performance test

[alexforencich]

Can you provide any more information about the host system?

[beer-belly]

Thank you very much for your answer.
CPU:Intel(R) Xeon(R) CPU E5-2609 v3 @ 1.90GHz physical id is : 2 processor is : 12
mem: 128G DDR3

I added counters in rx_engine.v

[alexforencich]

First, your PCIe link is only gen 3 x8, so there is no way you're going to break 50-60 Gbps. I would say hitting 40 Gbps reliably is quite reasonable. If you want to do any better, you'll need to figure out how to get the card into a true x16 slot, possibly you need to pull the GPU and put the FPGA in that slot, and leave the other x16 slot empty. Also, those are very old CPUs. I have had issues with some of the older Xeon CPUs not going over 50 Gbps, even with a x16 link. I have not been able to figure out why, but it's not a Corundum problem as the Mellanox NICs I tested had the same problem. Only thing I can think of is that it's some limitation of the CPU uncore. Try a commercial NIC and see what kind of performance you get. Or try with a more recent CPU.