Test-Label: intel-Testing
Test-Status: SUCCESS
_Testing PASS_

DPDK git repo: dpdk
commit 3e3c7f3fa5ac3f2748a4463d87e73eb28024b401
Author: Hengqi Chen <hengqi.chen@gmail.com>
Date:   Mon Jun 9 07:23:47 2025 +0000

    net/virtio: fix check of threshold for Tx freeing
    
    Like most drivers, make the fast path of virtio_xmit_cleanup() behave as
    described by the comments of rte_eth_txconf::tx_free_thresh ([0]):
        Start freeing Tx buffers if there are
        less free descriptors than this value.
    
    The rationale behind this change is that:
      * vq->vq_nentries is set during device probe
        with the queue size specified by vhost backend,
        this value does not reflect the real nb_tx_desc
      * the real available tx desc is set to vq->vq_free_cnt
        via the nb_tx_desc param of rte_eth_tx_queue_setup() API
      * so `nb_used > vq->vq_nentries - vq->vq_free_thresh` could never be true
        if say nb_tx_desc=2048, vq->vq_nentries=4096, vq->vq_free_thresh=32,
        see bug report 1716 ([1]) for details.
    
    [0]: https://github.com/DPDK/dpdk/commit/72514b5d5543
    [1]: https://bugs.dpdk.org/show_bug.cgi?id=1716
    
    Bugzilla ID: 1716
    Fixes: 72514b5d5543 ("ethdev: fix check of threshold for Tx freeing")
    Cc: stable@dpdk.org
    
    Signed-off-by: Baoyuan Li <updoing@sina.com>
    Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com>
    Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>

Testing Summary : 18 Case Done, 18 Successful, 0 Failures      

TestPlan:
	pf_smoke: http://git.dpdk.org/tools/dts/tree/test_plans/pf_smoke_test_plan.rst
	vf_smoke: http://git.dpdk.org/tools/dts/tree/test_plans/vf_smoke_test_plan.rst
	virtio_smoke: http://git.dpdk.org/tools/dts/tree/test_plans/virtio_smoke_test_plan.rst

TestSuite:
	pf_smoke: http://git.dpdk.org/tools/dts/tree/tests/TestSuite_pf_smoke.py
	vf_smoke: http://git.dpdk.org/tools/dts/tree/tests/TestSuite_vf_smoke.py
	virtio_smoke: http://git.dpdk.org/tools/dts/tree/tests/TestSuite_virtio_smoke.py


OS : Ubuntu 22.04.2 LTS       
Kernel : 5.15.0-60-generic         
GCC : 11.3.0-1ubuntu1~22.04        
NIC : Ethernet Controller E810-C for SFP         
Target : x86_64-native-linuxapp-gcc      

	Test result details:
	+-------------+---------------------------+-------+
	| suite       | case                      | status|
	+-------------+---------------------------+-------+
	| asan_smoke  | test_rxtx_with_ASan_enable| passed|
	| pf_smoke    | test_pf_jumbo_frames      | passed|
	| pf_smoke    | test_pf_rss               | passed|
	| pf_smoke    | test_pf_tx_rx_queue       | passed|
	| vf_smoke    | test_vf_jumbo_frames      | passed|
	| vf_smoke    | test_vf_rss               | passed|
	| vf_smoke    | test_vf_tx_rx_queue       | passed|
	| virtio_smoke| test_virtio_loopback      | passed|
	| virtio_smoke| test_virtio_pvp           | passed|
	+-------------+---------------------------+-------+


OS : Ubuntu 22.04.2 LTS       
Kernel : 5.15.0-60-generic         
GCC : 11.3.0-1ubuntu1~22.04        
NIC : Ethernet Controller XL710 for 40GbE QSFP+         
Target : x86_64-native-linuxapp-gcc      

	Test result details:
	+-------------+---------------------------+-------+
	| suite       | case                      | status|
	+-------------+---------------------------+-------+
	| asan_smoke  | test_rxtx_with_ASan_enable| passed|
	| pf_smoke    | test_pf_jumbo_frames      | passed|
	| pf_smoke    | test_pf_rss               | passed|
	| pf_smoke    | test_pf_tx_rx_queue       | passed|
	| vf_smoke    | test_vf_rss               | passed|
	| vf_smoke    | test_vf_tx_rx_queue       | passed|
	| vf_smoke    | test_vf_jumbo_frames      | n/a   |
	| virtio_smoke| test_virtio_loopback      | passed|
	| virtio_smoke| test_virtio_pvp           | passed|
	+-------------+---------------------------+-------+


DPDK STV team