On Fri, 6 May 2022 07:46:39 +0000 Mikael R Carlsson <[email protected]> wrote:
> Hi! > > I am using a Intel E810-XXVDA4 and DPDK version 19.11. During troubleshooting > we have captures outgoing traffic with dpdk-pdump: > > dpdk-pdump -- --pdump 'port=1,queue=*,tx-dev=/tmp/tx.pcap > > I have opened the pcap-file in wireshark and I can see that some packets are > delayed. However, system behavior indicates that the delays I see in the pcap > file are not correct, they are too big. My questions is, how is the timestamp > on packets in the pcap from dpdk-pdump created, like NIC HW generated, CPU > time at disk write etc. or something else? Are there any run-time or > build-time options to change the source of the timestamps? > > / Mikael > > > The timestamp for packet capture in DPDK is done when packet is queued to the device. It is not possible with current driver architecture to get timestamp when/after the packet was transmitted.
