https://bugs.dpdk.org/show_bug.cgi?id=2075
Bug ID: 2075
Summary: pdump fails on hairpin queue
Product: DPDK
Version: 26.11
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: Normal
Component: core
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Message from Haan on Slack reported issue with dpdk-dumpcap with hairpin queue
Hello all,
I found a problem with dpdk-dumpcap that makes it fail to capture, it happens
if a DPDK program has a port that has a haripin queue, the first run fails with
Unknown error -22 , every later run on the same port fails with File exists.
Steps to reproduce:
1. Start testpmd with one hairpin queue per port:
dpdk-testpmd -l 0-1 -a <PCI_ADDR> -- -i --rxq=1 --txq=1 --hairpinq=1
testpmd> start
2. In another shell, run dumpcap:
dpdk-dumpcap -i 0 -w /tmp/zzz.pcap
Result:
File: zzz.pcap
PDUMP: pdump_prepare_client_request(): client request for pdump enable/disable
failed
EAL: Error - exiting with code: 1
Packet dump enable on 0:0000:01:00.0 failed Unknown error -22
3. Run the same dumpcap command again:
Result:
File: zzz.pcap
PDUMP: pdump_prepare_client_request(): client request for pdump enable/disable
failed
EAL: Error - exiting with code: 1
Packet dump enable on 0:0000:01:00.0 failed File exists
Any idea how can I use it to capture even if there's a haripin queue?
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