https://bugs.dpdk.org/show_bug.cgi?id=1602
Bug ID: 1602
Summary: igc: hardware timestamp is always zero with
RTE_ETH_RX_OFFLOAD_TIMESTAMP
Product: DPDK
Version: 23.11
Hardware: x86
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: Normal
Component: ethdev
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Created attachment 298
--> https://bugs.dpdk.org/attachment.cgi?id=298&action=edit
Patch for rxtx_callbacks example to show hardware timestamp
I tried to use RTE_ETH_RX_OFFLOAD_TIMESTAMP with timestamp dynfield to get a
hardware timestamp on every packet. But it is always zero despite
RTE_ETH_RX_OFFLOAD_TIMESTAMP is supported for igc and enabled.
I encountered this problem in my own project. But this problem could be
reproduced with PktGen-DPDK and the rxtx_callbacks example.
My setup contains two ports (02:00.0 and 03:00.0) connected together on the
same machine:
I am generating traffic with pktgen-dpdk on port 02:00.0:
sudo env LD_LIBRARY_PATH=/opt/dpdk24/lib ./usr/local/bin/pktgen -l 0,1 -n 4 -b
03:00.0 --file-prefix pktgen -- -P -m "[1].0" -s 0:traces/small_flows.pcap
And receiving them on port 03:00.0:
sudo ./examples/dpdk-rxtx_callbacks -c 2 -n 3 -b 02:00.0 -- -t
The rxtx_callbacks examples is modified with the attached patch to show hw ts
in rx callbacks.
But for all the timestamps I get are zeros.
I am using uio_pci_generic with Intel Corporation Ethernet Controller I226-V
(rev 04).
I am aware that there's some problem with hardware timestamp for igc and has
applied this patch to my dpdk installation:
https://lore.kernel.org/dpdk-dev/[email protected]/#t
Please kindly ask if more information is needed to debug it. Thanks!
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