[dpdk-dev] [Bug 597] PCAP PMD reports incorrect TX stats when sending jumbo frames

[bugzilla at dpdk.org]

https://bugs.dpdk.org/show_bug.cgi?id=597

            Bug ID: 597
           Summary: PCAP PMD reports incorrect TX stats when sending jumbo
                    frames
           Product: DPDK
           Version: unspecified
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: minor
          Priority: Normal
         Component: ethdev
          Assignee: dev at dpdk.org
          Reporter: cian.ferriter at intel.com
  Target Milestone: ---

When the PCAP PMD TXes jumbo frames to a file, the wrong tx bytes size is
reported.

In the below example, 2 packets are in the RX PCAP file. The RX-bytes are
reported correctly since each packet is 65535 Bytes.

Port statistics ====================================
  ######################## NIC statistics for port 0  ########################
  RX-packets: 2          RX-missed: 0          RX-bytes:  131070
  RX-errors: 0
  RX-nombuf:  0
  TX-packets: 2          TX-errors: 0          TX-bytes:  32256

  Throughput (since last show)
  Rx-pps:            1          Rx-bps:      1048400
  Tx-pps:            1          Tx-bps:       258008
  ############################################################################

TX_bytes is wrong. It's value is set by "RTE_ETHER_MAX_JUMBO_FRAME_LEN" which
is 16128.

#define RTE_ETHER_MAX_JUMBO_FRAME_LEN \
    0x3F00 /**< Maximum Jumbo frame length, including CRC. */

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