Hi all,
I have a latency problem with the Exanic-X25.
When I use Exanic-X25 SmartNIC 10G Firmware (provided by the Cisco), I got about 950ns latency.
When I compile FDK "native_nic_example" with evaluation license for different versions, I got the following latencies.
-FDK version 2.9.0 about 1150ns
-FDK version 2.10.1 about 1230ns
-FDK version 2.11.0 about 1150ns
Vivado version 2022.2 is used for all compilation. PCLe logic frequency is 500Mhz. I haven't tried any other firmware provided by the Cisco since firmware name suggest 25G, which is not supported by the network.
Also FDK says free version has 35ns extra latency with respect to full version.
My questions are,
1. What might be the reason for the huge latency between firmware provided Cisco and the FDK compiled? (I have some theory, different IP versions due to different Vivado version, wrong config etc, but I couldn't really figure it out)
2. Even I get the license for full version, can I reduce the latency as much as firmware provided by the Cisco by compiling the FDK?
3. Is there any config setting for compilation 10G or 25G that I am missing in FDK?
4. Does 25G firmware support 10G network?
Thanks for advance
