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<base href="https://bugs.dpdk.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_UNCONFIRMED "
title="UNCONFIRMED - Update for mbuf fast release TX offload not enabled by default in testpmd"
href="https://bugs.dpdk.org/show_bug.cgi?id=1769">1769</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Update for mbuf fast release TX offload not enabled by default in testpmd
</td>
</tr>
<tr>
<th>Product</th>
<td>DTS
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</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>tests
</td>
</tr>
<tr>
<th>Assignee</th>
<td>dts@dpdk.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>mb@smartsharesystems.com
</td>
</tr>
<tr>
<th>Target Milestone</th>
<td>---
</td>
</tr></table>
<p>
<div class="bz_comment_block">
<pre class="bz_comment_text">The patch "[v3,3/3] ethdev: Reject conflicting TX offloads configuration" [1]
applied to next-net is causing CI failures.
Specifically, the test_txoffload_queue test case in the rxtx_offload_test_plan
test plan fails.
The patch 3/3 depends on "[v3,1/3] testpmd: Do not enable mbuf fast release TX
offload by default" [2], which has not yet been applied to next-net, and a
modification of the test plan related to this patch 1/3.
The required modifications to the "rxtx_offload_test_plan.rst" test plan are
described below.
## Are notes describing the modification, and should be omitted.
[1]:
<a href="https://patchwork.dpdk.org/project/dpdk/patch/20250803194218.683318-3-mb@smartsharesystems.com/">https://patchwork.dpdk.org/project/dpdk/patch/20250803194218.683318-3-mb@smartsharesystems.com/</a>
[2]:
<a href="https://patchwork.dpdk.org/project/dpdk/patch/20250803194218.683318-1-mb@smartsharesystems.com/">https://patchwork.dpdk.org/project/dpdk/patch/20250803194218.683318-1-mb@smartsharesystems.com/</a>
Test case: Intel® Ethernet 700 Series Tx offload per-queue setting
==================================================================
1. Start testpmd and get the tx_offload capability and configuration::
./<build_target>/app/dpdk-testpmd -c f -n 4 -- -i --rxq=4 --txq=4
testpmd> show port 0 tx_offload capabilities
Tx Offloading Capabilities of port 0 :
Per Queue : MBUF_FAST_FREE
## MBUF_FAST_FREE is also supported per port (unrelated change)
- Per Port : VLAN_INSERT IPV4_CKSUM UDP_CKSUM TCP_CKSUM SCTP_CKSUM
TCP_TSO OUTER_IPV4_CKSUM QINQ_INSERT VXLAN_TNL_TSO GRE_TNL_TSO IPIP_TNL_TSO
GENEVE_TNL_TSO MULTI_SEGS
+ Per Port : VLAN_INSERT IPV4_CKSUM UDP_CKSUM TCP_CKSUM SCTP_CKSUM
TCP_TSO OUTER_IPV4_CKSUM QINQ_INSERT VXLAN_TNL_TSO GRE_TNL_TSO IPIP_TNL_TSO
GENEVE_TNL_TSO MULTI_SEGS MBUF_FAST_FREE
testpmd> show port 0 tx_offload configuration
Tx Offloading Configuration of port 0 :
## The updated testpmd does not enable MBUF_FAST_FREE per default
- Port : MBUF_FAST_FREE
+ Port :
Queue[ 0] :
Queue[ 1] :
Queue[ 2] :
Queue[ 3] :
## This is now the default state, so this test item has been moved to the end.
-2. Disable mbuf_fast_free per_port::
-
- testpmd> port stop 0
- testpmd> port config 0 tx_offload mbuf_fast_free off
- testpmd> port start 0
- testpmd> show port 0 tx_offload configuration
- Tx Offloading Configuration of port 0 :
- Port :
- Queue[ 0] :
- Queue[ 1] :
- Queue[ 2] :
- Queue[ 3] :
-
## Renumbered.
-3. Enable mbuf_fast_free per_queue::
+2. Enable mbuf_fast_free per_queue::
## With the above test item moved, the port has not yet been started. No need
to stop it.
- testpmd> port stop 0
testpmd> port 0 txq 0 tx_offload mbuf_fast_free on
testpmd> port 0 txq 1 tx_offload mbuf_fast_free on
testpmd> port 0 txq 2 tx_offload mbuf_fast_free on
testpmd> port 0 txq 3 tx_offload mbuf_fast_free on
testpmd> port start 0
testpmd> show port 0 tx_offload configuration
Tx Offloading Configuration of port 0 :
Port :
Queue[ 0] : MBUF_FAST_FREE
Queue[ 1] : MBUF_FAST_FREE
Queue[ 2] : MBUF_FAST_FREE
Queue[ 3] : MBUF_FAST_FREE
testpmd> start
The port fwd can be started normally.
## Renumbered.
-4. Disable mbuf_fast_free per_queue::
+3. Disable mbuf_fast_free per_queue::
testpmd> port stop 0
testpmd> port 0 txq 0 tx_offload mbuf_fast_free off
testpmd> port 0 txq 1 tx_offload mbuf_fast_free off
testpmd> port 0 txq 2 tx_offload mbuf_fast_free off
testpmd> port 0 txq 3 tx_offload mbuf_fast_free off
testpmd> port start 0
testpmd> show port 0 tx_offload configuration
Tx Offloading Configuration of port 0 :
Port :
Queue[ 0] :
Queue[ 1] :
Queue[ 2] :
Queue[ 3] :
## Renumbered.
-5. Enable mbuf_fast_free per_port::
+4. Enable mbuf_fast_free per_port::
testpmd> port stop 0
testpmd> port config 0 tx_offload mbuf_fast_free on
testpmd> port start 0
testpmd> show port 0 tx_offload configuration
Tx Offloading Configuration of port 0 :
Port : MBUF_FAST_FREE
Queue[ 0] : MBUF_FAST_FREE
Queue[ 1] : MBUF_FAST_FREE
Queue[ 2] : MBUF_FAST_FREE
Queue[ 3] : MBUF_FAST_FREE
testpmd> start
The port fwd can be started normally.
## Test item moved from above to here, and renumbered.
+5. Disable mbuf_fast_free per_port::
+
+ testpmd> port stop 0
+ testpmd> port config 0 tx_offload mbuf_fast_free off
+ testpmd> port start 0
+ testpmd> show port 0 tx_offload configuration
+ Tx Offloading Configuration of port 0 :
+ Port :
+ Queue[ 0] :
+ Queue[ 1] :
+ Queue[ 2] :
+ Queue[ 3] :
+
Note 1: there is no tx_offload per_queue parameter in ixgbe driver,
so this case is just only for i40e.
</pre>
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