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net/pcap: support for multiple queues is broken

DPDK/ethdev Bug 1865 [email protected] 1 participant 1 message Jan 8

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http://bugs.dpdk.org/show_bug.cgi?id=1865

            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: [email protected]
          Reporter: [email protected]

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 which 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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