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<body><table border="1" cellspacing="0" cellpadding="8" class="bz_new_table">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_UNCONFIRMED "
title="UNCONFIRMED - igc: hardware timestamp is always zero with RTE_ETH_RX_OFFLOAD_TIMESTAMP"
href="https://bugs.dpdk.org/show_bug.cgi?id=1602">1602</a>
</td>
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<tr>
<th>Summary</th>
<td>igc: hardware timestamp is always zero with RTE_ETH_RX_OFFLOAD_TIMESTAMP
</td>
</tr>
<tr>
<th>Product</th>
<td>DPDK
</td>
</tr>
<tr>
<th>Version</th>
<td>23.11
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>UNCONFIRMED
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>Normal
</td>
</tr>
<tr>
<th>Component</th>
<td>ethdev
</td>
</tr>
<tr>
<th>Assignee</th>
<td>dev@dpdk.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>rpf@mail.ustc.edu.cn
</td>
</tr>
<tr>
<th>Target Milestone</th>
<td>---
</td>
</tr></table>
<p>
<div class="bz_comment_block">
<pre class="bz_comment_text">Created <span class=""><a href="attachment.cgi?id=298&action=diff" name="attach_298" title="Patch for rxtx_callbacks example to show hardware timestamp">attachment 298</a> <a href="attachment.cgi?id=298&action=edit" title="Patch for rxtx_callbacks example to show hardware timestamp">[details]</a></span>
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:
<a href="https://lore.kernel.org/dpdk-dev/00f78eba-8eff-4c67-8ecf-3bef5f25b9f6@allegro-packets.com/#t">https://lore.kernel.org/dpdk-dev/00f78eba-8eff-4c67-8ecf-3bef5f25b9f6@allegro-packets.com/#t</a>
Please kindly ask if more information is needed to debug it. Thanks!
</pre>
</div>
</p>
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