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From: bugzilla@dpdk.org
To: dev@dpdk.org
Subject: [DPDK/ethdev Bug 1865] net/pcap: support for multiple queues is broken
Date: Thu, 08 Jan 2026 18:22:02 +0000
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X-Bugzilla-Component: ethdev
X-Bugzilla-Version: 25.11
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X-Bugzilla-Who: stephen@networkplumber.org
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http://bugs.dpdk.org/show_bug.cgi?id=3D1865

            Bug ID: 1865
           Summary: net/pcap: support for multiple queues is broken
           Product: DPDK
           Version: 25.11
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: major
          Priority: Normal
         Component: ethdev
          Assignee: dev@dpdk.org
          Reporter: stephen@networkplumber.org
  Target Milestone: ---

When use using pcap PMD the driver advertises support for 16 queues.
But this is not correct. Each queue is a separate instance of pcap handle w=
hich
is a then handled as separate file descriptor.

The result is that on transmit each queue overwrites the other in the file.=
 And
can result in truncated or corrupt file. On receive each queue reads all the
packets in the file, there is no RSS or distribution.

Driver should just not report multi-queue or it needs to do locking.

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