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From: Mikael R Carlsson <Mikael.R.Carlsson@tietoevry.com>
To: "users@dpdk.org" <users@dpdk.org>
Subject: Configure timestamp source for dpdk-pdump on E810 and DPDK 19.11
Thread-Topic: Configure timestamp source for dpdk-pdump on E810 and DPDK 19.11
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Date: Fri, 6 May 2022 07:46:39 +0000
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Hi!

I am using a Intel E810-XXVDA4 and DPDK version 19.11. During troubleshooti=
ng we have captures outgoing traffic with dpdk-pdump:

dpdk-pdump -- --pdump 'port=3D1,queue=3D*,tx-dev=3D/tmp/tx.pcap

I have opened the pcap-file in wireshark and I can see that some packets ar=
e 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 ti=
mestamp on packets in the pcap from dpdk-pdump created, like NIC HW generat=
ed, CPU time at disk write etc. or something else? Are there any run-time o=
r build-time options to change the source of the timestamps?

  / Mikael




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<p class=3D"MsoNormal"><span lang=3D"SV">Hi!<o:p></o:p></span></p>
<p>I am using a Intel E810-XXVDA4 and DPDK version 19.11. During troublesho=
oting we have captures outgoing traffic with dpdk-pdump:<o:p></o:p></p>
<p><code><span style=3D"font-size:10.0pt">dpdk-pdump -- --pdump 'port=3D1,q=
ueue=3D*,tx-dev=3D/tmp/tx.pcap</span></code><o:p></o:p></p>
<p>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 t=
he 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?<o:p></o:p></p>
<p>&nbsp; / Mikael<o:p></o:p></p>
<p><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
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