From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id A078A4681E; Thu, 29 May 2025 10:18:39 +0200 (CEST) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 026CE427B0; Thu, 29 May 2025 10:16:30 +0200 (CEST) Received: from inbox.dpdk.org (inbox.dpdk.org [95.142.172.178]) by mails.dpdk.org (Postfix) with ESMTP id 489CC427BD for ; Thu, 29 May 2025 10:16:29 +0200 (CEST) Received: by inbox.dpdk.org (Postfix, from userid 33) id 3C51F4681F; Thu, 29 May 2025 10:16:29 +0200 (CEST) From: bugzilla@dpdk.org To: dev@dpdk.org Subject: [DPDK/ethdev Bug 1716] virtio_xmit_cleanup failed when vm rx/tx queues from 1024 to 4096 Date: Thu, 29 May 2025 08:16:28 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: DPDK X-Bugzilla-Component: ethdev X-Bugzilla-Version: 22.11 X-Bugzilla-Keywords: X-Bugzilla-Severity: major X-Bugzilla-Who: updoing@sina.com X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: Normal X-Bugzilla-Assigned-To: dev@dpdk.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter target_milestone attachments.created Message-ID: Content-Type: multipart/alternative; boundary=17485065890.7Cdf6.3889295 Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://bugs.dpdk.org/ Auto-Submitted: auto-generated X-Auto-Response-Suppress: All MIME-Version: 1.0 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org --17485065890.7Cdf6.3889295 Date: Thu, 29 May 2025 10:16:28 +0200 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.dpdk.org/ Auto-Submitted: auto-generated X-Auto-Response-Suppress: All https://bugs.dpdk.org/show_bug.cgi?id=3D1716 Bug ID: 1716 Summary: virtio_xmit_cleanup failed when vm rx/tx queues from 1024 to 4096 Product: DPDK Version: 22.11 Hardware: Other OS: All Status: UNCONFIRMED Severity: major Priority: Normal Component: ethdev Assignee: dev@dpdk.org Reporter: updoing@sina.com Target Milestone: --- Created attachment 319 --> https://bugs.dpdk.org/attachment.cgi?id=3D319&action=3Dedit viritio patch In a virtual machine scenario running a DPDK application with virtio driver= s, when the host machine adjusted the guest VM's transmit/receive queue size f= rom 1024 to 4096, the DPDK application's allocated 2048 mbufs became insufficie= nt. After this adjustment, the condition vq->vq_nentries - vq->vq_free_thresh w= as never triggered, resulting in the cleanup operation not occurring. virtio_dev_rx_queue_setup the third param nb_desc is not used when vq->vq_free_cnt great then nb_desc. vq->vq_free_cnt is assigned a value thr= ough vq->n_nentries when virtio driver has inited. i40e driver vq has a nb_rx_de= sc value, our dpdk app nb_desc setup 2048, malloc 2048 mbufs, so our dpdk app rx/tx burst is failed on the line. --=20 You are receiving this mail because: You are the assignee for the bug.= --17485065890.7Cdf6.3889295 Date: Thu, 29 May 2025 10:16:29 +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
Bug ID 1716
Summary virtio_xmit_cleanup failed when vm rx/tx queues from 1024 to = 4096
Product DPDK
Version 22.11
Hardware Other
OS All
Status UNCONFIRMED
Severity major
Priority Normal
Component ethdev
Assignee dev@dpdk.org
Reporter updoing@sina.com
Target Milestone --- 

Created attachment 319 [details]
viritio patch

In a virtual machine scenario running a DPDK application with virtio driver=
s,
when the host machine adjusted the guest VM's transmit/receive queue size f=
rom
1024 to 4096, the DPDK application's allocated 2048 mbufs became insufficie=
nt.
After this adjustment, the condition vq->vq_nentries - vq->vq_free_th=
resh was
never triggered, resulting in the cleanup operation not occurring.

virtio_dev_rx_queue_setup the third param nb_desc is not used when
vq->vq_free_cnt great then nb_desc. vq->vq_free_cnt is assigned a val=
ue through
vq->n_nentries when virtio driver has inited. i40e driver vq has a nb_rx=
_desc
value, our dpdk app nb_desc setup 2048, malloc 2048 mbufs, so our dpdk app
rx/tx burst is failed on the line.

You are receiving this mail because:
  • You are the assignee for the bug.
=20=20=20=20=20=20=20=20=20=20
= --17485065890.7Cdf6.3889295--