Hi all, I measured a roundtrip latency (using Spirent traffic generator) of sending 64B packets over a 10GbE to DPDK, and DPDK does nothing but simply forward back to the incoming port (l3fwd without any lookup code, i.e., dstport = port_id).
However, to my surprise, the average latency was around 150 usec. (The packet drop rate was only 0.001%, i.e., 283 packets/sec dropped) Another test I did was to measure the latency due to sending only a single 64B packet, and the latency I measured is ranging anywhere from 40 usec to 100 usec. I do not understand why this is so slow. Can someone explain the reasoning behind this phenomenon? Thank you so much!
