[DPDK/ethdev Bug 1732] E830 Tx packet pacing support causing seg fault on E810

[DPDK/ethdev Bug 1732] E830 Tx packet pacing support causing seg fault on E810

[bugzilla]

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https://bugs.dpdk.org/show_bug.cgi?id=1732

            Bug ID: 1732
           Summary: E830 Tx packet pacing support causing seg fault on
                    E810
           Product: DPDK
           Version: 25.03
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: ethdev
          Assignee: dev@dpdk.org
          Reporter: mmahajan@iol.unh.edu
  Target Milestone: ---

Hello,

A new patch was committed to dpdk-next-net-intel a few days ago, and since then
our Intel E810 100G forwarding performance test has not been running because
testpmd is segfaulting on startup.

The patch that introduced the issue is: "net/intel: add Tx packet pacing
support for E830" (commit ID: fd8ef1fc471f7eef6b103ece65f00de655f13ed4). It was
authored by Soumyadeep Hore and merged into dpdk-next-net-intel on 2025-06-23.


EAL:
build/app/dpdk-testpmd \
  -l 4-5 -n 4 \
  --file-prefix=dpdk_179921_20250626115614 \
  -a 0000:4b:00.0 -a 0000:4b:00.1 \
  -- -i \
  --portmask=0x3 \
  --rxq=1 \
  --txq=1 \
  --port-topology=loop \
  --txd=512 \
  --rxd=512 \
  --nb-cores=1
EAL: Detected CPU lcores: 128
EAL: Detected NUMA nodes: 2
EAL: Detected static linkage of DPDK
EAL: Multi-process socket /var/run/dpdk/dpdk_179921_20250626115614/mp_socket
EAL: Selected IOVA mode 'VA'
EAL: VFIO support initialized
EAL: Using IOMMU type 1 (Type 1)
ICE_INIT: ice_load_pkg_type(): Active package is: 1.3.39.1, ICE OS Default
Package (double VLAN mode)
ICE_INIT: ice_load_pkg_type(): Active package is: 1.3.39.1, ICE OS Default
Package (double VLAN mode)
Interactive-mode selected
testpmd: create a new mbuf pool <mb_pool_0>: n=155456, size=2176, socket=0
testpmd: preferred mempool ops selected: ring_mp_mc
Configuring Port 0 (socket 0)
Segmentation fault (core dumped)


NIC info:
Intel Corporation Ethernet Controller E810-C for QSFP

ethtool:
driver: ice
version: 5.15.0-142-generic
firmware-version: 4.80 0x80020543 1.3805.0
bus-info: 0000:4b:00.0

Ice version: 1.3.39.1

OS: Ubuntu VERSION="22.04.3 LTS (Jammy Jellyfish)"
Arch: x86
CPU: Intel(R) Xeon(R) Platinum 8360Y CPU @ 2.40GHz

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[DPDK/ethdev Bug 1732] E830 Tx packet pacing support causing seg fault on E810

[bugzilla]

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https://bugs.dpdk.org/show_bug.cgi?id=1732

Patrick Robb (probb@iol.unh.edu) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |probb@iol.unh.edu
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |FIXED

--- Comment #1 from Patrick Robb (probb@iol.unh.edu) ---
Bruce pushed a fix to next-net-intel/for-next-net, which has been manually
tested and there is no more segfault when starting testpmd on this system/NIC.
Closing this ticket.

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