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--16808588960.47b2EC.626079
Date: Fri, 7 Apr 2023 11:14:56 +0200
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https://bugs.dpdk.org/show_bug.cgi?id=3D1212

            Bug ID: 1212
           Summary: [dpdk-21.11.8]pvp_qemu_multi_paths_port_restart:perf_p
                    vp_qemu_vector_rx_mac: performance drop about 23.5%
                    when send small packets
           Product: DPDK
           Version: 20.11
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: vhost/virtio
          Assignee: dev@dpdk.org
          Reporter: weix.ling@intel.com
  Target Milestone: ---

[Environment]

DPDK version: Use make showversion or for a non-released version: git remot=
e -v
&& git show-ref --heads
 20.11.8-rc1
Other software versions: QEMU-7.0.0.
OS: Ubuntu 22.04.1 LTS/Linux 5.15.45-051545-generic
Compiler: gcc version 11.3.0 (Ubuntu 11.3.0-1ubuntu1~22.04)
Hardware platform: Intel(R) Xeon(R) Platinum 8280M CPU @ 2.70GHz
NIC hardware: Intel Ethernet Controller XL710 for 40GbE QSFP+ 1583
NIC firmware: i40e-2.22.18/9.20 0x8000d893 1.3353.0

[Test Setup]
Steps to reproduce
List the steps to reproduce the issue.

1.Bind 1 NIC port to vfio-pci

dpdk-devbind.py --force --bind=3Dvfio-pci 0000:af:00.0

2.Start vhost-user:

x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 28,29,30 -n 4 -a 0000:af:00.=
0=20
--file-prefix=3Dvhost_2352949_20230407162534  --vdev
'net_vhost0,iface=3Dvhost-net,queues=3D1' -- -i --nb-cores=3D1 --txd=3D1024=
 --rxd=3D1024

testpmd>set fwd mac
testpmd>start

3.Start VM0 with QEMU-7.0.0

taskset -c 20,21,22,23,24,25,26,27 /home/QEMU/qemu-7.0.0/bin/qemu-system-x8=
6_64
 -name vm0 -enable-kvm -pidfile /tmp/.vm0.pid -daemonize -monitor
unix:/tmp/vm0_monitor.sock,server,nowait -netdev
user,id=3Dnttsip1,hostfwd=3Dtcp:10.239.252.220:6000-:22 -device
e1000,netdev=3Dnttsip1  -chardev socket,id=3Dchar0,path=3D./vhost-net -netd=
ev
type=3Dvhost-user,id=3Dnetdev0,chardev=3Dchar0,vhostforce -device
virtio-net-pci,netdev=3Dnetdev0,mac=3D52:54:00:00:00:01,disable-modern=3Dtr=
ue,mrg_rxbuf=3Doff,rx_queue_size=3D1024,tx_queue_size=3D1024
-cpu host -smp 8 -m 16384 -object
memory-backend-file,id=3Dmem,size=3D16384M,mem-path=3D/mnt/huge,share=3Don =
-numa
node,memdev=3Dmem -mem-prealloc -chardev
socket,path=3D/tmp/vm0_qga0.sock,server,nowait,id=3Dvm0_qga0 -device virtio=
-serial
-device virtserialport,chardev=3Dvm0_qga0,name=3Dorg.qemu.guest_agent.0 -vn=
c :4
-drive file=3D/home/image/ubuntu2004.img

4.SSH VM0 and bind virtio-net to vfio-pci:

echo 0 > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages
echo 1024 >
/sys/devices/system/node/node0/hugepages/hugepages-2048kB/nr_hugepages
mkdir -p /mnt/huge
mount -t hugetlbfs nodev /mnt/hugemodprobe vfio-pci
echo 1 > /sys/module/vfio/parameters/enable_unsafe_noiommu_mode
dpdk-devbind.py --force --bind=3Dvfio-pci 0000:00:04.0

5.Start testpmd in VM0:

x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0x3 -n 3 -- -i --nb-cores=3D1
--txd=3D1024 --rxd=3D1024

testpmd>set fwd mac
testpmd>start

6.Use pktgen to send packets, and record the throughput.

Show the output from the previous commands.

+--------------+----------------------+------------------+------------+----=
------------+
| FrameSize(B) |         Mode         | Throughput(Mpps) | % linerate |=20=
=20=20=20
Cycle      |
+=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D+=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D+=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D+=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D+=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D+
| 64           | virtio0.95 vector_rx | 4.314            | 7.247      | Bef=
ore
Restart |
+--------------+----------------------+------------------+------------+----=
------------+
| 128          | virtio0.95 vector_rx | 4.244            | 12.563     | Bef=
ore
Restart |
+--------------+----------------------+------------------+------------+----=
------------+
| 256          | virtio0.95 vector_rx | 4.576            | 25.262     | Bef=
ore
Restart |
+--------------+----------------------+------------------+------------+----=
------------+
| 512          | virtio0.95 vector_rx | 3.435            | 36.544     | Bef=
ore
Restart |
+--------------+----------------------+------------------+------------+----=
------------+
| 1024         | virtio0.95 vector_rx | 2.695            | 56.268     | Bef=
ore
Restart |
+--------------+----------------------+------------------+------------+----=
------------+
| 1280         | virtio0.95 vector_rx | 2.490            | 64.731     | Bef=
ore
Restart |
+--------------+----------------------+------------------+------------+----=
------------+
| 1518         | virtio0.95 vector_rx | 2.248            | 69.140     | Bef=
ore
Restart |
+--------------+----------------------+------------------+------------+----=
------------+=20

[Expected Result]
Explain what is the expected result in text or as an example output:

+--------------+----------------------+------------------+------------+----=
------------+
| FrameSize(B) |         Mode         | Throughput(Mpps) | % linerate |=20=
=20=20=20
Cycle      |
+=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D+=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D+=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D+=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D+=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D+
| 64           | virtio0.95 vector_rx | 5.642            | 9.478      | Bef=
ore
Restart |
+--------------+----------------------+------------------+------------+----=
------------+
| 128          | virtio0.95 vector_rx | 5.493            | 16.259     | Bef=
ore
Restart |
+--------------+----------------------+------------------+------------+----=
------------+
| 256          | virtio0.95 vector_rx | 5.004            | 27.620     | Bef=
ore
Restart |
+--------------+----------------------+------------------+------------+----=
------------+
| 512          | virtio0.95 vector_rx | 3.343            | 35.565     | Bef=
ore
Restart |
+--------------+----------------------+------------------+------------+----=
------------+
| 1024         | virtio0.95 vector_rx | 2.664            | 55.629     | Bef=
ore
Restart |
+--------------+----------------------+------------------+------------+----=
------------+
| 1280         | virtio0.95 vector_rx | 2.500            | 64.990     | Bef=
ore
Restart |
+--------------+----------------------+------------------+------------+----=
------------+
| 1518         | virtio0.95 vector_rx | 2.309            | 71.028     | Bef=
ore
Restart |
+--------------+----------------------+------------------+------------+----=
------------+=20
Regression
Is this issue a regression: (Y/N) Y

Version the regression was introduced: Specify git id if known.

Bad commit id:

commit abfe2cb0b40b3ceeb44df642c9d28a06bdfc9fb4 (HEAD)
Author: Luca Boccassi <bluca@debian.org>
Date:   Mon Nov 28 14:11:25 2022 +0000

    Revert "mempool: fix get objects from mempool with cache"

    As requested by the author

    This reverts commit 26cb4c81b552594292f7c744afb904f01700dfe8.

--=20
You are receiving this mail because:
You are the assignee for the bug.=

--16808588960.47b2EC.626079
Date: Fri, 7 Apr 2023 11:14:56 +0200
MIME-Version: 1.0
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://bugs.dpdk.org/
Auto-Submitted: auto-generated
X-Auto-Response-Suppress: All

<html>
    <head>
      <base href=3D"https://bugs.dpdk.org/">
    </head>
    <body><table border=3D"1" cellspacing=3D"0" cellpadding=3D"8" class=3D"=
bz_new_table">
        <tr>
          <th>Bug ID</th>
          <td><a class=3D"bz_bug_link=20
          bz_status_UNCONFIRMED "
   title=3D"UNCONFIRMED - [dpdk-21.11.8]pvp_qemu_multi_paths_port_restart:p=
erf_pvp_qemu_vector_rx_mac: performance drop about 23.5% when send small pa=
ckets"
   href=3D"https://bugs.dpdk.org/show_bug.cgi?id=3D1212">1212</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[dpdk-21.11.8]pvp_qemu_multi_paths_port_restart:perf_pvp_qemu=
_vector_rx_mac: performance drop about 23.5% when send small packets
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>DPDK
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>20.11
          </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>vhost/virtio
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>dev&#64;dpdk.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>weix.ling&#64;intel.com
          </td>
        </tr>

        <tr>
          <th>Target Milestone</th>
          <td>---
          </td>
        </tr></table>
      <p>
        <div class=3D"bz_comment_block">
          <pre class=3D"bz_comment_text">[Environment]

DPDK version: Use make showversion or for a non-released version: git remot=
e -v
&amp;&amp; git show-ref --heads
 20.11.8-rc1
Other software versions: QEMU-7.0.0.
OS: Ubuntu 22.04.1 LTS/Linux 5.15.45-051545-generic
Compiler: gcc version 11.3.0 (Ubuntu 11.3.0-1ubuntu1~22.04)
Hardware platform: Intel(R) Xeon(R) Platinum 8280M CPU &#64; 2.70GHz
NIC hardware: Intel Ethernet Controller XL710 for 40GbE QSFP+ 1583
NIC firmware: i40e-2.22.18/9.20 0x8000d893 1.3353.0

[Test Setup]
Steps to reproduce
List the steps to reproduce the issue.

1.Bind 1 NIC port to vfio-pci

dpdk-devbind.py --force --bind=3Dvfio-pci 0000:af:00.0

2.Start vhost-user:

x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 28,29,30 -n 4 -a 0000:af:00.=
0=20
--file-prefix=3Dvhost_2352949_20230407162534  --vdev
'net_vhost0,iface=3Dvhost-net,queues=3D1' -- -i --nb-cores=3D1 --txd=3D1024=
 --rxd=3D1024

testpmd&gt;set fwd mac
testpmd&gt;start

3.Start VM0 with QEMU-7.0.0

taskset -c 20,21,22,23,24,25,26,27 /home/QEMU/qemu-7.0.0/bin/qemu-system-x8=
6_64
 -name vm0 -enable-kvm -pidfile /tmp/.vm0.pid -daemonize -monitor
unix:/tmp/vm0_monitor.sock,server,nowait -netdev
user,id=3Dnttsip1,hostfwd=3Dtcp:10.239.252.220:6000-:22 -device
e1000,netdev=3Dnttsip1  -chardev socket,id=3Dchar0,path=3D./vhost-net -netd=
ev
type=3Dvhost-user,id=3Dnetdev0,chardev=3Dchar0,vhostforce -device
virtio-net-pci,netdev=3Dnetdev0,mac=3D52:54:00:00:00:01,disable-modern=3Dtr=
ue,mrg_rxbuf=3Doff,rx_queue_size=3D1024,tx_queue_size=3D1024
-cpu host -smp 8 -m 16384 -object
memory-backend-file,id=3Dmem,size=3D16384M,mem-path=3D/mnt/huge,share=3Don =
-numa
node,memdev=3Dmem -mem-prealloc -chardev
socket,path=3D/tmp/vm0_qga0.sock,server,nowait,id=3Dvm0_qga0 -device virtio=
-serial
-device virtserialport,chardev=3Dvm0_qga0,name=3Dorg.qemu.guest_agent.0 -vn=
c :4
-drive file=3D/home/image/ubuntu2004.img

4.SSH VM0 and bind virtio-net to vfio-pci:

echo 0 &gt; /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages
echo 1024 &gt;
/sys/devices/system/node/node0/hugepages/hugepages-2048kB/nr_hugepages
mkdir -p /mnt/huge
mount -t hugetlbfs nodev /mnt/hugemodprobe vfio-pci
echo 1 &gt; /sys/module/vfio/parameters/enable_unsafe_noiommu_mode
dpdk-devbind.py --force --bind=3Dvfio-pci 0000:00:04.0

5.Start testpmd in VM0:

x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0x3 -n 3 -- -i --nb-cores=3D1
--txd=3D1024 --rxd=3D1024

testpmd&gt;set fwd mac
testpmd&gt;start

6.Use pktgen to send packets, and record the throughput.

Show the output from the previous commands.

+--------------+----------------------+------------------+------------+----=
------------+
| FrameSize(B) |         Mode         | Throughput(Mpps) | % linerate |=20=
=20=20=20
Cycle      |
+=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D+=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D+=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D+=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D+=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D+
| 64           | virtio0.95 vector_rx | 4.314            | 7.247      | Bef=
ore
Restart |
+--------------+----------------------+------------------+------------+----=
------------+
| 128          | virtio0.95 vector_rx | 4.244            | 12.563     | Bef=
ore
Restart |
+--------------+----------------------+------------------+------------+----=
------------+
| 256          | virtio0.95 vector_rx | 4.576            | 25.262     | Bef=
ore
Restart |
+--------------+----------------------+------------------+------------+----=
------------+
| 512          | virtio0.95 vector_rx | 3.435            | 36.544     | Bef=
ore
Restart |
+--------------+----------------------+------------------+------------+----=
------------+
| 1024         | virtio0.95 vector_rx | 2.695            | 56.268     | Bef=
ore
Restart |
+--------------+----------------------+------------------+------------+----=
------------+
| 1280         | virtio0.95 vector_rx | 2.490            | 64.731     | Bef=
ore
Restart |
+--------------+----------------------+------------------+------------+----=
------------+
| 1518         | virtio0.95 vector_rx | 2.248            | 69.140     | Bef=
ore
Restart |
+--------------+----------------------+------------------+------------+----=
------------+=20

[Expected Result]
Explain what is the expected result in text or as an example output:

+--------------+----------------------+------------------+------------+----=
------------+
| FrameSize(B) |         Mode         | Throughput(Mpps) | % linerate |=20=
=20=20=20
Cycle      |
+=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D+=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D+=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D+=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D+=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D+
| 64           | virtio0.95 vector_rx | 5.642            | 9.478      | Bef=
ore
Restart |
+--------------+----------------------+------------------+------------+----=
------------+
| 128          | virtio0.95 vector_rx | 5.493            | 16.259     | Bef=
ore
Restart |
+--------------+----------------------+------------------+------------+----=
------------+
| 256          | virtio0.95 vector_rx | 5.004            | 27.620     | Bef=
ore
Restart |
+--------------+----------------------+------------------+------------+----=
------------+
| 512          | virtio0.95 vector_rx | 3.343            | 35.565     | Bef=
ore
Restart |
+--------------+----------------------+------------------+------------+----=
------------+
| 1024         | virtio0.95 vector_rx | 2.664            | 55.629     | Bef=
ore
Restart |
+--------------+----------------------+------------------+------------+----=
------------+
| 1280         | virtio0.95 vector_rx | 2.500            | 64.990     | Bef=
ore
Restart |
+--------------+----------------------+------------------+------------+----=
------------+
| 1518         | virtio0.95 vector_rx | 2.309            | 71.028     | Bef=
ore
Restart |
+--------------+----------------------+------------------+------------+----=
------------+=20
Regression
Is this issue a regression: (Y/N) Y

Version the regression was introduced: Specify git id if known.

Bad commit id:

commit abfe2cb0b40b3ceeb44df642c9d28a06bdfc9fb4 (HEAD)
Author: Luca Boccassi &lt;<a href=3D"mailto:bluca&#64;debian.org">bluca&#64=
;debian.org</a>&gt;
Date:   Mon Nov 28 14:11:25 2022 +0000

    Revert &quot;mempool: fix get objects from mempool with cache&quot;

    As requested by the author

    This reverts commit 26cb4c81b552594292f7c744afb904f01700dfe8.
          </pre>
        </div>
      </p>


      <hr>
      <span>You are receiving this mail because:</span>

      <ul>
          <li>You are the assignee for the bug.</li>
      </ul>
      <div itemscope itemtype=3D"http://schema.org/EmailMessage">
        <div itemprop=3D"action" itemscope itemtype=3D"http://schema.org/Vi=
ewAction">
=20=20=20=20=20=20=20=20=20=20
          <link itemprop=3D"url" href=3D"https://bugs.dpdk.org/show_bug.cgi=
?id=3D1212">
          <meta itemprop=3D"name" content=3D"View bug">
        </div>
        <meta itemprop=3D"description" content=3D"Bugzilla bug update notif=
ication">
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--16808588960.47b2EC.626079--