[dpdk-users] Can dpdk-pdump capture high speed traffic?

[Stephen Hemminger]

On Tue, 30 Jun 2020 15:33:53 +0800
"Licj" <272465698 at qq.com> wrote:

> I have two machines directly connected with Mellanox 56g nice.
> 
> I am running pktgen-dpdk on one machine, and testpmd&dpdk-pdump on the other machine. One is for packet sending and the other is for recving.
> 
> 
> The pktgen and testpmd both show 50Gbps traffic. But the pcap file only show several hundreds Mbps.

The current packet capture has multiple context switches and packet copies.
Also, it is limited by the speed of filesystem writes.