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List:       dpdk-users
Subject:    Re: [dpdk-users] Can dpdk-pdump capture high speed traffic?
From:       Stephen Hemminger <stephen () networkplumber ! org>
Date:       2020-06-30 15:04:11
Message-ID: 20200630080411.72ac077c () hermes ! lan
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On Tue, 30 Jun 2020 15:33:53 +0800
"Licj" <272465698@qq.com> wrote:

> I have two machines directly connected with Mellanox 56g nice.
> 
> I am running pktgen-dpdk on one machine, and testpmd&amp;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.


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