[DPDK/ethdev Bug 2031] cn10k: NPA_POOL_ERR_INT_RANGE on Pool 1 during mbuf pool creation in testpmd

[DPDK/ethdev Bug 2031] cn10k: NPA_POOL_ERR_INT_RANGE on Pool 1 during mbuf pool creation in testpmd

[bugzilla]

https://bugs.dpdk.org/show_bug.cgi?id=2031

            Bug ID: 2031
           Summary: cn10k: NPA_POOL_ERR_INT_RANGE on Pool 1 during mbuf
                    pool creation in testpmd
           Product: DPDK
           Version: 24.11
          Hardware: ARM
                OS: Linux
            Status: UNCONFIRMED
          Severity: critical
          Priority: Normal
         Component: ethdev
          Assignee: dev@dpdk.org
          Reporter: amiyaranjan.mohakud@gmail.com
  Target Milestone: ---

Created attachment 390
  --> https://bugs.dpdk.org/attachment.cgi?id=390&action=edit
testpmd-cn10k-mempool-issue.txt

Environment:
------------

  - SoC: Marvell Octeon CN10K (cn10kb_a0)
  - Kernel: 6.12.68
  - DPDK: 24.11.2
  - IOVA mode: PA
  - VFIO: no-iommu mode
  - Hugepages: 1024 x 2MB (2048 MB total)
  - Mempool ops: cn10k_mempool_ops

Description:
--------------
testpmd creates mbuf pool mb_pool_0 (n=203456, size=2304) using
cn10k_mempool_ops. During pool populate, Pool 1 triggers NPA_POOL_ERR_INT_RANGE
repeatedly, followed by Err_intr=0x1000:

  testpmd: create a new mbuf pool <mb_pool_0>: n=203456, size=2304, socket=0
  testpmd: preferred mempool ops selected: cn10k_mempool_ops

  CNXK: npa_q_irq():150 queue_intr=0x1 qintx=1
  CNXK: npa_q_irq():165 Pool=1 NPA_POOL_ERR_INT_RANGE
    (repeats 4 times during mbuf pool populate)

  Configuring Port 0 (socket 0)
  CNXK: npa_err_irq():18 Err_intr=0x1000
  CNXK: npa_err_irq():18 Err_intr=0x1000

  Pool 1 context at time of error:
  ptr_start:    0x24808d200
  ptr_end:      0x267200000
  buf_size:     20 (units of 128 bytes = 2560 bytes)
  buf_offset:   1
  count:        decreasing across dumps (0x31aa6 → 0x31a91 → 0x31a79 → 0)
  op_pc:        increasing (0x1a → 0x2f → 0x47 → 0x31ac0)
  stack_pages:  0 (remains zero across all dumps)

Notable observations:
----------------------
  - stack_pages remains 0 throughout, even as op_pc increases — suggesting
buffers are being freed but the stack is not being updated
  - count decreases to 0 by the final dump, indicating the pool is fully
drained
  - The address range [0x24808d200, 0x267200000) spans ~512 MB, but the mempool
requests ~203K buffers of 2304 bytes (~447 MB)


Expected Result
-------------------
No NPA pool range errors. Pool 1 should initialize and populate without
triggering NPA_POOL_ERR_INT_RANGE or npa_err_irq interrupts.

-- 
You are receiving this mail because:
You are the assignee for the bug.