.. SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
.. include:: <isonum.txt>

================
Ethtool counters
================

:Copyright: |copy| 2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved.

Contents
========

- `Overview`_
- `Groups`_
- `Types`_
- `Descriptions`_

Overview
========

There are several counter groups based on where the counter is being counted. In
addition, each group of counters may have different counter types.

These counter groups are based on which component in a networking setup,
illustrated below, that they describe::

                                                  ----------------------------------------
                                                  |                                      |
    ----------------------------------------    ---------------------------------------- |
    |              Hypervisor              |    |                  VM                  | |
    |                                      |    |                                      | |
    | -------------------  --------------- |    | -------------------  --------------- | |
    | | Ethernet driver |  | RDMA driver | |    | | Ethernet driver |  | RDMA driver | | |
    | -------------------  --------------- |    | -------------------  --------------- | |
    |           |                 |        |    |           |                 |        | |
    |           -------------------        |    |           -------------------        | |
    |                   |                  |    |                   |                  |--
    ----------------------------------------    ----------------------------------------
                        |                                           |
            -------------               -----------------------------
            |                           |
         ------                      ------ ------ ------         ------      ------      ------
    -----| PF |----------------------| VF |-| VF |-| VF |-----  --| PF |--- --| PF |--- --| PF |---
    |    ------                      ------ ------ ------    |  | ------  | | ------  | | ------  |
    |                                                        |  |         | |         | |         |
    |                                                        |  |         | |         | |         |
    |                                                        |  |         | |         | |         |
    | eSwitch                                                |  | eSwitch | | eSwitch | | eSwitch |
    ----------------------------------------------------------  ----------- ----------- -----------
               -------------------------------------------------------------------------------
               |                                                                             |
               |                                                                             |
               | Uplink (no counters)                                                        |
               -------------------------------------------------------------------------------
                       ---------------------------------------------------------------
                       |                                                             |
                       |                                                             |
                       | MPFS (no counters)                                          |
                       ---------------------------------------------------------------
                                                     |
                                                     |
                                                     | Port

Groups
======

Ring
  Software counters populated by the driver stack.

Netdev
  An aggregation of software ring counters.

vPort counters
  Traffic counters and drops due to steering or no buffers. May indicate issues
  with NIC. These counters include Ethernet traffic counters (including Raw
  Ethernet) and RDMA/RoCE traffic counters.

Physical port counters
  Counters that collect statistics about the PFs and VFs. May indicate issues
  with NIC, link, or network. This measuring point holds information on
  standardized counters like IEEE 802.3, RFC2863, RFC 2819, RFC 3635 and
  additional counters like flow control, FEC and more. Physical port counters
  are not exposed to virtual machines.

Priority Port Counters
  A set of the physical port counters, per priority per port.

Types
=====

Counters are divided into three types.

Traffic Informative Counters
  Counters which count traffic. These counters can be used for load estimation
  or for general debug.

Traffic Acceleration Counters
  Counters which count traffic that was accelerated by Mellanox driver or by
  hardware. The counters are an additional layer to the informative counter set,
  and the same traffic is counted in both informative and acceleration counters.

.. [#accel] Traffic acceleration counter.

Error Counters
  Increment of these counters might indicate a problem. Each of these counters
  has an explanation and correction action.

Statistic can be fetched via the `ip link` or `ethtool` commands. `ethtool`
provides more detailed information.::

    ip –s link show <if-name>
    ethtool -S <if-name>

Descriptions
============

XSK, PTP, and QoS counters that are similar to counters defined previously will
not be separately listed. For example, `ptp_tx[i]_packets` will not be
explicitly documented since `tx[i]_packets` describes the behavior of both
counters, except `ptp_tx[i]_packets` is only counted when precision time
protocol is used.

Ring / Netdev Counter
----------------------------
The following counters are available per ring or software port.

These counters provide information on the amount of traffic that was accelerated
by the NIC. The counters are counting the accelerated traffic in addition to the
standard counters which counts it (i.e. accelerated traffic is counted twice).

The counter names in the table below refers to both ring and port counters. The
notation for ring counters includes the [i] index without the braces. The
notation for port counters doesn't include the [i]. A counter name
`rx[i]_packets` will be printed as `rx0_packets` for ring 0 and `rx_packets` for
the software port.

.. flat-table:: Ring / Software Port Counter Table
   :widths: 2 3 1

   * - Counter
     - Description
     - Type

   * - `rx[i]_packets`
     - The number of packets received on ring i.
     - Informative

   * - `rx[i]_bytes`
     - The number of bytes received on ring i.
     - Informative

   * - `tx[i]_packets`
     - The number of packets transmitted on ring i.
     - Informative

   * - `tx[i]_bytes`
     - The number of bytes transmitted on ring i.
     - Informative

   * - `tx[i]_recover`
     - The number of times the SQ was recovered.
     - Error

   * - `tx[i]_cqes`
     - Number of CQEs events on SQ issued on ring i.
     - Informative

   * - `tx[i]_cqe_err`
     - The number of error CQEs encountered on the SQ for ring i.
     - Error

   * - `tx[i]_tso_packets`
     - The number of TSO packets transmitted on ring i [#accel]_.
     - Acceleration

   * - `tx[i]_tso_bytes`
     - The number of TSO bytes transmitted on ring i [#accel]_.
     - Acceleration

   * - `tx[i]_tso_inner_packets`
     - The number of TSO packets which are indicated to be carry internal
       encapsulation transmitted on ring i [#accel]_.
     - Acceleration

   * - `tx[i]_tso_inner_bytes`
     - The number of TSO bytes which are indicated to be carry internal
       encapsulation transmitted on ring i [#accel]_.
     - Acceleration

   * - `rx[i]_gro_packets`
     - Number of received packets processed using hardware-accelerated GRO. The
       number of hardware GRO offloaded packets received on ring i.
     - Acceleration

   * - `rx[i]_gro_bytes`
     - Number of received bytes processed using hardware-accelerated GRO. The
       number of hardware GRO offloaded bytes received on ring i.
     - Acceleration

   * - `rx[i]_gro_skbs`
     - The number of receive SKBs constructed while performing
       hardware-accelerated GRO.
     - Informative

   * - `rx[i]_gro_match_packets`
     - Number of received packets processed using hardware-accelerated GRO that
       met the flow table match criteria.
     - Informative

   * - `rx[i]_gro_large_hds`
     - Number of receive packets using hardware-accelerated GRO that have large
       headers that require additional memory to be allocated.
     - Informative

   * - `rx[i]_lro_packets`
     - The number of LRO packets received on ring i [#accel]_.
     - Acceleration

   * - `rx[i]_lro_bytes`
     - The number of LRO bytes received on ring i [#accel]_.
     - Acceleration

   * - `rx[i]_ecn_mark`
     - The number of received packets where the ECN mark was turned on.
     - Informative

   * - `rx_oversize_pkts_buffer`
     - The number of dropped received packets due to length which arrived to RQ
       and exceed software buffer size allocated by the device for incoming
       traffic. It might imply that the device MTU is larger than the software
       buffers size.
     - Error

   * - `rx_oversize_pkts_sw_drop`
     - Number of received packets dropped in software because the CQE data is
       larger than the MTU size.
     - Error

   * - `rx[i]_csum_unnecessary`
     - Packets received with a `CHECKSUM_UNNECESSARY` on ring i [#accel]_.
     - Acceleration

   * - `rx[i]_csum_unnecessary_inner`
     - Packets received with inner encapsulation with a `CHECKSUM_UNNECESSARY`
       on ring i [#accel]_.
     - Acceleration

   * - `rx[i]_csum_none`
     - Packets received with a `CHECKSUM_NONE` on ring i [#accel]_.
     - Acceleration

   * - `rx[i]_csum_complete`
     - Packets received with a `CHECKSUM_COMPLETE` on ring i [#accel]_.
     - Acceleration

   * - `rx[i]_csum_complete_tail`
     - Number of received packets that had checksum calculation computed,
       potentially needed padding, and were able to do so with
       `CHECKSUM_PARTIAL`.
     - Informative

   * - `rx[i]_csum_complete_tail_slow`
     - Number of received packets that need padding larger than eight bytes for
       the checksum.
     - Informative

   * - `tx[i]_csum_partial`
     - Packets transmitted with a `CHECKSUM_PARTIAL` on ring i [#accel]_.
     - Acceleration

   * - `tx[i]_csum_partial_inner`
     - Packets transmitted with inner encapsulation with a `CHECKSUM_PARTIAL` on
       ring i [#accel]_.
     - Acceleration

   * - `tx[i]_csum_none`
     - Packets transmitted with no hardware checksum acceleration on ring i.
     - Informative

   * - `tx[i]_stopped` / `tx_queue_stopped` [#ring_global]_
     - Events where SQ was full on ring i. If this counter is increased, check
       the amount of buffers allocated for transmission.
     - Informative

   * - `tx[i]_wake` / `tx_queue_wake` [#ring_global]_
     - Events where SQ was full and has become not full on ring i.
     - Informative

   * - `tx[i]_dropped` / `tx_queue_dropped` [#ring_global]_
     - Packets transmitted that were dropped due to DMA mapping failure on
       ring i. If this counter is increased, check the amount of buffers
       allocated for transmission.
     - Error

   * - `tx[i]_nop`
     - The number of nop WQEs (empty WQEs) inserted to the SQ (related to
       ring i) due to the reach of the end of the cyclic buffer. When reaching
       near to the end of cyclic buffer the driver may add those empty WQEs to
       avoid handling a state the a WQE start in the end of the queue and ends
       in the beginning of the queue. This is a normal condition.
     - Informative

   * - `tx[i]_added_vlan_packets`
     - The number of packets sent where vlan tag insertion was offloaded to the
       hardware.
     - Acceleration

   * - `rx[i]_removed_vlan_packets`
     - The number of packets received where vlan tag stripping was offloaded to
       the hardware.
     - Acceleration

   * - `rx[i]_wqe_err`
     - The number of wrong opcodes received on ring i.
     - Error

   * - `rx[i]_mpwqe_frag`
     - The number of WQEs that failed to allocate compound page and hence
       fragmented MPWQE’s (Multi Packet WQEs) were used on ring i. If this
       counter raise, it may suggest that there is no enough memory for large
       pages, the driver allocated fragmented pages. This is not abnormal
       condition.
     - Informative

   * - `rx[i]_mpwqe_filler_cqes`
     - The number of filler CQEs events that were issued on ring i.
     - Informative

   * - `rx[i]_mpwqe_filler_strides`
     - The number of strides consumed by filler CQEs on ring i.
     - Informative

   * - `tx[i]_mpwqe_blks`
     - The number of send blocks processed from Multi-Packet WQEs (mpwqe).
     - Informative

   * - `tx[i]_mpwqe_pkts`
     - The number of send packets processed from Multi-Packet WQEs (mpwqe).
     - Informative

   * - `rx[i]_cqe_compress_blks`
     - The number of receive blocks with CQE compression on ring i [#accel]_.
     - Acceleration

   * - `rx[i]_cqe_compress_pkts`
     - The number of receive packets with CQE compression on ring i [#accel]_.
     - Acceleration

   * - `rx[i]_arfs_err`
     - Number of flow rules that failed to be added to the flow table.
     - Error

   * - `rx[i]_recover`
     - The number of times the RQ was recovered.
     - Error

   * - `tx[i]_xmit_more`
     - The number of packets sent with `xmit_more` indication set on the skbuff
       (no doorbell).
     - Acceleration

   * - `ch[i]_poll`
     - The number of invocations of NAPI poll of channel i.
     - Informative

   * - `ch[i]_arm`
     - The number of times the NAPI poll function completed and armed the
       completion queues on channel i.
     - Informative

   * - `ch[i]_aff_change`
     - The number of times the NAPI poll function explicitly stopped execution
       on a CPU due to a change in affinity, on channel i.
     - Informative

   * - `ch[i]_events`
     - The number of hard interrupt events on the completion queues of channel i.
     - Informative

   * - `ch[i]_eq_rearm`
     - The number of times the EQ was recovered.
     - Error

   * - `ch[i]_force_irq`
     - Number of times NAPI is triggered by XSK wakeups by posting a NOP to
       ICOSQ.
     - Acceleration

   * - `rx[i]_congst_umr`
     - The number of times an outstanding UMR request is delayed due to
       congestion, on ring i.
     - Informative

   * - `rx_pp_alloc_fast`
     - Number of successful fast path allocations.
     - Informative

   * - `rx_pp_alloc_slow`
     - Number of slow path order-0 allocations.
     - Informative

   * - `rx_pp_alloc_slow_high_order`
     - Number of slow path high order allocations.
     - Informative

   * - `rx_pp_alloc_empty`
     - Counter is incremented when ptr ring is empty, so a slow path allocation
       was forced.
     - Informative

   * - `rx_pp_alloc_refill`
     - Counter is incremented when an allocation which triggered a refill of the
       cache.
     - Informative

   * - `rx_pp_alloc_waive`
     - Counter is incremented when pages obtained from the ptr ring that cannot
       be added to the cache due to a NUMA mismatch.
     - Informative

   * - `rx_pp_recycle_cached`
     - Counter is incremented when recycling placed page in the page pool cache.
     - Informative

   * - `rx_pp_recycle_cache_full`
     - Counter is incremented when page pool cache was full.
     - Informative

   * - `rx_pp_recycle_ring`
     - Counter is incremented when page placed into the ptr ring.
     - Informative

   * - `rx_pp_recycle_ring_full`
     - Counter is incremented when page released from page pool because the ptr
       ring was full.
     - Informative

   * - `rx_pp_recycle_released_ref`
     - Counter is incremented when page released (and not recycled) because
       refcnt > 1.
     - Informative

   * - `rx[i]_xsk_buff_alloc_err`
     - The number of times allocating an skb or XSK buffer failed in the XSK RQ
       context.
     - Error

   * - `rx[i]_xsk_arfs_err`
     - aRFS (accelerated Receive Flow Steering) does not occur in the XSK RQ
       context, so this counter should never increment.
     - Error

   * - `rx[i]_xdp_tx_xmit`
     - The number of packets forwarded back to the port due to XDP program
       `XDP_TX` action (bouncing). these packets are not counted by other
       software counters. These packets are counted by physical port and vPort
       counters.
     - Informative

   * - `rx[i]_xdp_tx_mpwqe`
     - Number of multi-packet WQEs transmitted by the netdev and `XDP_TX`-ed by
       the netdev during the RQ context.
     - Acceleration

   * - `rx[i]_xdp_tx_inlnw`
     - Number of WQE data segments transmitted where the data could be inlined
       in the WQE and then `XDP_TX`-ed during the RQ context.
     - Acceleration

   * - `rx[i]_xdp_tx_nops`
     - Number of NOP WQEBBs (WQE building blocks) received posted to the XDP SQ.
     - Acceleration

   * - `rx[i]_xdp_tx_full`
     - The number of packets that should have been forwarded back to the port
       due to `XDP_TX` action but were dropped due to full tx queue. These packets
       are not counted by other software counters. These packets are counted by
       physical port and vPort counters. You may open more rx queues and spread
       traffic rx over all queues and/or increase rx ring size.
     - Error

   * - `rx[i]_xdp_tx_err`
     - The number of times an `XDP_TX` error such as frame too long and frame
       too short occurred on `XDP_TX` ring of RX ring.
     - Error

   * - `rx[i]_xdp_tx_cqes` / `rx_xdp_tx_cqe` [#ring_global]_
     - The number of completions received on the CQ of the `XDP_TX` ring.
     - Informative

   * - `rx[i]_xdp_drop`
     - The number of packets dropped due to XDP program `XDP_DROP` action. these
       packets are not counted by other software counters. These packets are
       counted by physical port and vPort counters.
     - Informative

   * - `rx[i]_xdp_redirect`
     - The number of times an XDP redirect action was triggered on ring i.
     - Acceleration

   * - `tx[i]_xdp_xmit`
     - The number of packets redirected to the interface(due to XDP redirect).
       These packets are not counted by other software counters. These packets
       are counted by physical port and vPort counters.
     - Informative

   * - `tx[i]_xdp_full`
     - The number of packets redirected to the interface(due to XDP redirect),
       but were dropped due to full tx queue. these packets are not counted by
       other software counters. you may enlarge tx queues.
     - Informative

   * - `tx[i]_xdp_mpwqe`
     - Number of multi-packet WQEs offloaded onto the NIC that were
       `XDP_REDIRECT`-ed from other netdevs.
     - Acceleration

   * - `tx[i]_xdp_inlnw`
     - Number of WQE data segments where the data could be inlined in the WQE
       where the data segments were `XDP_REDIRECT`-ed from other netdevs.
     - Acceleration

   * - `tx[i]_xdp_nops`
     - Number of NOP WQEBBs (WQE building blocks) posted to the SQ that were
       `XDP_REDIRECT`-ed from other netdevs.
     - Acceleration

   * - `tx[i]_xdp_err`
     - The number of packets redirected to the interface(due to XDP redirect)
       but were dropped due to error such as frame too long and frame too short.
     - Error

   * - `tx[i]_xdp_cqes`
     - The number of completions received for packets redirected to the
       interface(due to XDP redirect) on the CQ.
     - Informative

   * - `tx[i]_xsk_xmit`
     - The number of packets transmitted using XSK zerocopy functionality.
     - Acceleration

   * - `tx[i]_xsk_mpwqe`
     - Number of multi-packet WQEs offloaded onto the NIC that were
       `XDP_REDIRECT`-ed from other netdevs.
     - Acceleration

   * - `tx[i]_xsk_inlnw`
     - Number of WQE data segments where the data could be inlined in the WQE
       that are transmitted using XSK zerocopy.
     - Acceleration

   * - `tx[i]_xsk_full`
     - Number of times doorbell is rung in XSK zerocopy mode when SQ is full.
     - Error

   * - `tx[i]_xsk_err`
     - Number of errors that occurred in XSK zerocopy mode such as if the data
       size is larger than the MTU size.
     - Error

   * - `tx[i]_xsk_cqes`
     - Number of CQEs processed in XSK zerocopy mode.
     - Acceleration

   * - `tx_tls_ctx`
     - Number of TLS TX HW offload contexts added to device for encryption.
     - Acceleration

   * - `tx_tls_del`
     - Number of TLS TX HW offload contexts removed from device (connection
       closed).
     - Acceleration

   * - `tx_tls_pool_alloc`
     - Number of times a unit of work is successfully allocated in the TLS HW
       offload pool.
     - Acceleration

   * - `tx_tls_pool_free`
     - Number of times a unit of work is freed in the TLS HW offload pool.
     - Acceleration

   * - `rx_tls_ctx`
     - Number of TLS RX HW offload contexts added to device for decryption.
     - Acceleration

   * - `rx_tls_del`
     - Number of TLS RX HW offload contexts deleted from device (connection has
       finished).
     - Acceleration

   * - `rx[i]_tls_decrypted_packets`
     - Number of successfully decrypted RX packets which were part of a TLS
       stream.
     - Acceleration

   * - `rx[i]_tls_decrypted_bytes`
     - Number of TLS payload bytes in RX packets which were successfully
       decrypted.
     - Acceleration

   * - `rx[i]_tls_resync_req_pkt`
     - Number of received TLS packets with a resync request.
     - Acceleration

   * - `rx[i]_tls_resync_req_start`
     - Number of times the TLS async resync request was started.
     - Acceleration

   * - `rx[i]_tls_resync_req_end`
     - Number of times the TLS async resync request properly ended with
       providing the HW tracked tcp-seq.
     - Acceleration

   * - `rx[i]_tls_resync_req_skip`
     - Number of times the TLS async resync request procedure was started but
       not properly ended.
     - Error

   * - `rx[i]_tls_resync_res_ok`
     - Number of times the TLS resync response call to the driver was
       successfully handled.
     - Acceleration

   * - `rx[i]_tls_resync_res_retry`
     - Number of times the TLS resync response call to the driver was
       reattempted when ICOSQ is full.
     - Error

   * - `rx[i]_tls_resync_res_skip`
     - Number of times the TLS resync response call to the driver was terminated
       unsuccessfully.
     - Error

   * - `rx[i]_tls_err`
     - Number of times when CQE TLS offload was problematic.
     - Error

   * - `tx[i]_tls_encrypted_packets`
     - The number of send packets that are TLS encrypted by the kernel.
     - Acceleration

   * - `tx[i]_tls_encrypted_bytes`
     - The number of send bytes that are TLS encrypted by the kernel.
     - Acceleration

   * - `tx[i]_tls_ooo`
     - Number of times out of order TLS SQE fragments were handled on ring i.
     - Acceleration

   * - `tx[i]_tls_dump_packets`
     - Number of TLS decrypted packets copied over from NIC over DMA.
     - Acceleration

   * - `tx[i]_tls_dump_bytes`
     - Number of TLS decrypted bytes copied over from NIC over DMA.
     - Acceleration

   * - `tx[i]_tls_resync_bytes`
     - Number of TLS bytes requested to be resynchronized in order to be
       decrypted.
     - Acceleration

   * - `tx[i]_tls_skip_no_sync_data`
     - Number of TLS send data that can safely be skipped / do not need to be
       decrypted.
     - Acceleration

   * - `tx[i]_tls_drop_no_sync_data`
     - Number of TLS send data that were dropped due to retransmission of TLS
       data.
     - Acceleration

   * - `ptp_cq[i]_abort`
     - Number of times a CQE has to be skipped in precision time protocol due to
       a skew between the port timestamp and CQE timestamp being greater than
       128 seconds.
     - Error

   * - `ptp_cq[i]_abort_abs_diff_ns`
     - Accumulation of time differences between the port timestamp and CQE
       timestamp when the difference is greater than 128 seconds in precision
       time protocol.
     - Error

.. [#ring_global] The corresponding ring and global counters do not share the
                  same name (i.e. do not follow the common naming scheme).

vPort Counters
--------------
Counters on the NIC port that is connected to a eSwitch.

.. flat-table:: vPort Counter Table
   :widths: 2 3 1

   * - Counter
     - Description
     - Type

   * - `rx_vport_unicast_packets`
     - Unicast packets received, steered to a port including Raw Ethernet
       QP/DPDK traffic, excluding RDMA traffic.
     - Informative

   * - `rx_vport_unicast_bytes`
     - Unicast bytes received, steered to a port including Raw Ethernet QP/DPDK
       traffic, excluding RDMA traffic.
     - Informative

   * - `tx_vport_unicast_packets`
     - Unicast packets transmitted, steered from a port including Raw Ethernet
       QP/DPDK traffic, excluding RDMA traffic.
     - Informative

   * - `tx_vport_unicast_bytes`
     - Unicast bytes transmitted, steered from a port including Raw Ethernet
       QP/DPDK traffic, excluding RDMA traffic.
     - Informative

   * - `rx_vport_multicast_packets`
     - Multicast packets received, steered to a port including Raw Ethernet
       QP/DPDK traffic, excluding RDMA traffic.
     - Informative

   * - `rx_vport_multicast_bytes`
     - Multicast bytes received, steered to a port including Raw Ethernet
       QP/DPDK traffic, excluding RDMA traffic.
     - Informative

   * - `tx_vport_multicast_packets`
     - Multicast packets transmitted, steered from a port including Raw Ethernet
       QP/DPDK traffic, excluding RDMA traffic.
     - Informative

   * - `tx_vport_multicast_bytes`
     - Multicast bytes transmitted, steered from a port including Raw Ethernet
       QP/DPDK traffic, excluding RDMA traffic.
     - Informative

   * - `rx_vport_broadcast_packets`
     - Broadcast packets received, steered to a port including Raw Ethernet
       QP/DPDK traffic, excluding RDMA traffic.
     - Informative

   * - `rx_vport_broadcast_bytes`
     - Broadcast bytes received, steered to a port including Raw Ethernet
       QP/DPDK traffic, excluding RDMA traffic.
     - Informative

   * - `tx_vport_broadcast_packets`
     - Broadcast packets transmitted, steered from a port including Raw Ethernet
       QP/DPDK traffic, excluding RDMA traffic.
     - Informative

   * - `tx_vport_broadcast_bytes`
     - Broadcast bytes transmitted, steered from a port including Raw Ethernet
       QP/DPDK traffic, excluding RDMA traffic.
     - Informative

   * - `rx_vport_rdma_unicast_packets`
     - RDMA unicast packets received, steered to a port (counters counts
       RoCE/UD/RC traffic) [#accel]_.
     - Acceleration

   * - `rx_vport_rdma_unicast_bytes`
     - RDMA unicast bytes received, steered to a port (counters counts
       RoCE/UD/RC traffic) [#accel]_.
     - Acceleration

   * - `tx_vport_rdma_unicast_packets`
     - RDMA unicast packets transmitted, steered from a port (counters counts
       RoCE/UD/RC traffic) [#accel]_.
     - Acceleration

   * - `tx_vport_rdma_unicast_bytes`
     - RDMA unicast bytes transmitted, steered from a port (counters counts
       RoCE/UD/RC traffic) [#accel]_.
     - Acceleration

   * - `rx_vport_rdma_multicast_packets`
     - RDMA multicast packets received, steered to a port (counters counts
       RoCE/UD/RC traffic) [#accel]_.
     - Acceleration

   * - `rx_vport_rdma_multicast_bytes`
     - RDMA multicast bytes received, steered to a port (counters counts
       RoCE/UD/RC traffic) [#accel]_.
     - Acceleration

   * - `tx_vport_rdma_multicast_packets`
     - RDMA multicast packets transmitted, steered from a port (counters counts
       RoCE/UD/RC traffic) [#accel]_.
     - Acceleration

   * - `tx_vport_rdma_multicast_bytes`
     - RDMA multicast bytes transmitted, steered from a port (counters counts
       RoCE/UD/RC traffic) [#accel]_.
     - Acceleration

   * - `rx_steer_missed_packets`
     - Number of packets that was received by the NIC, however was discarded
       because it did not match any flow in the NIC flow table.
     - Error

   * - `rx_packets`
     - Representor only: packets received, that were handled by the hypervisor.
     - Informative

   * - `rx_bytes`
     - Representor only: bytes received, that were handled by the hypervisor.
     - Informative

   * - `tx_packets`
     - Representor only: packets transmitted, that were handled by the
       hypervisor.
     - Informative

   * - `tx_bytes`
     - Representor only: bytes transmitted, that were handled by the hypervisor.
     - Informative

   * - `dev_internal_queue_oob`
     - The number of dropped packets due to lack of receive WQEs for an internal
       device RQ.
     - Error

Physical Port Counters
----------------------
The physical port counters are the counters on the external port connecting the
adapter to the network. This measuring point holds information on standardized
counters like IEEE 802.3, RFC2863, RFC 2819, RFC 3635 and additional counters
like flow control, FEC and more.

.. flat-table:: Physical Port Counter Table
   :widths: 2 3 1

   * - Counter
     - Description
     - Type

   * - `rx_packets_phy`
     - The number of packets received on the physical port. This counter doesn’t
       include packets that were discarded due to FCS, frame size and similar
       errors.
     - Informative

   * - `tx_packets_phy`
     - The number of packets transmitted on the physical port.
     - Informative

   * - `rx_bytes_phy`
     - The number of bytes received on the physical port, including Ethernet
       header and FCS.
     - Informative

   * - `tx_bytes_phy`
     - The number of bytes transmitted on the physical port.
     - Informative

   * - `rx_multicast_phy`
     - The number of multicast packets received on the physical port.
     - Informative

   * - `tx_multicast_phy`
     - The number of multicast packets transmitted on the physical port.
     - Informative

   * - `rx_broadcast_phy`
     - The number of broadcast packets received on the physical port.
     - Informative

   * - `tx_broadcast_phy`
     - The number of broadcast packets transmitted on the physical port.
     - Informative

   * - `rx_crc_errors_phy`
     - The number of dropped received packets due to FCS (Frame Check Sequence)
       error on the physical port. If this counter is increased in high rate,
       check the link quality using `rx_symbol_error_phy` and
       `rx_corrected_bits_phy` counters below.
     - Error

   * - `rx_in_range_len_errors_phy`
     - The number of received packets dropped due to length/type errors on a
       physical port.
     - Error

   * - `rx_out_of_range_len_phy`
     - The number of received packets dropped due to length greater than allowed
       on a physical port. If this counter is increasing, it implies that the
       peer connected to the adapter has a larger MTU configured. Using same MTU
       configuration shall resolve this issue.
     - Error

   * - `rx_oversize_pkts_phy`
     - The number of dropped received packets due to length which exceed MTU
       size on a physical port. If this counter is increasing, it implies that
       the peer connected to the adapter has a larger MTU configured. Using same
       MTU configuration shall resolve this issue.
     - Error

   * - `rx_symbol_err_phy`
     - The number of received packets dropped due to physical coding errors
       (symbol errors) on a physical port.
     - Error

   * - `rx_mac_control_phy`
     - The number of MAC control packets received on the physical port.
     - Informative

   * - `tx_mac_control_phy`
     - The number of MAC control packets transmitted on the physical port.
     - Informative

   * - `rx_pause_ctrl_phy`
     - The number of link layer pause packets received on a physical port. If
       this counter is increasing, it implies that the network is congested and
       cannot absorb the traffic coming from to the adapter.
     - Informative

   * - `tx_pause_ctrl_phy`
     - The number of link layer pause packets transmitted on a physical port. If
       this counter is increasing, it implies that the NIC is congested and
       cannot absorb the traffic coming from the network.
     - Informative

   * - `rx_unsupported_op_phy`
     - The number of MAC control packets received with unsupported opcode on a
       physical port.
     - Error

   * - `rx_discards_phy`
     - The number of received packets dropped due to lack of buffers on a
       physical port. If this counter is increasing, it implies that the adapter
       is congested and cannot absorb the traffic coming from the network.
     - Error

   * - `tx_discards_phy`
     - The number of packets which were discarded on transmission, even no
       errors were detected. the drop might occur due to link in down state,
       head of line drop, pause from the network, etc.
     - Error

   * - `tx_errors_phy`
     - The number of transmitted packets dropped due to a length which exceed
       MTU size on a physical port.
     - Error

   * - `rx_undersize_pkts_phy`
     - The number of received packets dropped due to length which is shorter
       than 64 bytes on a physical port. If this counter is increasing, it
       implies that the peer connected to the adapter has a non-standard MTU
       configured or malformed packet had arrived.
     - Error

   * - `rx_fragments_phy`
     - The number of received packets dropped due to a length which is shorter
       than 64 bytes and has FCS error on a physical port. If this counter is
       increasing, it implies that the peer connected to the adapter has a
       non-standard MTU configured.
     - Error

   * - `rx_jabbers_phy`
     - The number of received packets d due to a length which is longer than 64
       bytes and had FCS error on a physical port.
     - Error

   * - `rx_64_bytes_phy`
     - The number of packets received on the physical port with size of 64 bytes.
     - Informative

   * - `rx_65_to_127_bytes_phy`
     - The number of packets received on the physical port with size of 65 to
       127 bytes.
     - Informative

   * - `rx_128_to_255_bytes_phy`
     - The number of packets received on the physical port with size of 128 to
       255 bytes.
     - Informative

   * - `rx_256_to_511_bytes_phy`
     - The number of packets received on the physical port with size of 256 to
       512 bytes.
     - Informative

   * - `rx_512_to_1023_bytes_phy`
     - The number of packets received on the physical port with size of 512 to
       1023 bytes.
     - Informative

   * - `rx_1024_to_1518_bytes_phy`
     - The number of packets received on the physical port with size of 1024 to
       1518 bytes.
     - Informative

   * - `rx_1519_to_2047_bytes_phy`
     - The number of packets received on the physical port with size of 1519 to
       2047 bytes.
     - Informative

   * - `rx_2048_to_4095_bytes_phy`
     - The number of packets received on the physical port with size of 2048 to
       4095 bytes.
     - Informative

   * - `rx_4096_to_8191_bytes_phy`
     - The number of packets received on the physical port with size of 4096 to
       8191 bytes.
     - Informative

   * - `rx_8192_to_10239_bytes_phy`
     - The number of packets received on the physical port with size of 8192 to
       10239 bytes.
     - Informative

   * - `link_down_events_phy`
     - The number of times where the link operative state changed to down. In
       case this counter is increasing it may imply on port flapping. You may
       need to replace the cable/transceiver.
     - Error

   * - `rx_out_of_buffer`
     - Number of times receive queue had no software buffers allocated for the
       adapter's incoming traffic.
     - Error

   * - `module_bus_stuck`
     - The number of times that module's I\ :sup:`2`\C bus (data or clock)
       short-wire was detected. You may need to replace the cable/transceiver.
     - Error

   * - `module_high_temp`
     - The number of times that the module temperature was too high. If this
       issue persist, you may need to check the ambient temperature or replace
       the cable/transceiver module.
     - Error

   * - `module_bad_shorted`
     - The number of times that the module cables were shorted. You may need to
       replace the cable/transceiver module.
     - Error

   * - `module_unplug`
     - The number of times that module was ejected.
     - Informative

   * - `rx_buffer_passed_thres_phy`
     - The number of events where the port receive buffer was over 85% full.
     - Informative

   * - `tx_pause_storm_warning_events`
     - The number of times the device was sending pauses for a long period of
       time.
     - Informative

   * - `tx_pause_storm_error_events`
     - The number of times the device was sending pauses for a long period of
       time, reaching time out and disabling transmission of pause frames. on
       the period where pause frames were disabled, drop could have been
       occurred.
     - Error

   * - `rx[i]_buff_alloc_err`
     - Failed to allocate a buffer to received packet (or SKB) on ring i.
     - Error

   * - `rx_bits_phy`
     - This counter provides information on the total amount of traffic that
       could have been received and can be used as a guideline to measure the
       ratio of errored traffic in `rx_pcs_symbol_err_phy` and
       `rx_corrected_bits_phy`.
     - Informative

   * - `rx_pcs_symbol_err_phy`
     - This counter counts the number of symbol errors that wasn’t corrected by
       FEC correction algorithm or that FEC algorithm was not active on this
       interface. If this counter is increasing, it implies that the link
       between the NIC and the network is suffering from high BER, and that
       traffic is lost. You may need to replace the cable/transceiver. The error
       rate is the number of `rx_pcs_symbol_err_phy` divided by the number of
       `rx_bits_phy` on a specific time frame.
     - Error

   * - `rx_corrected_bits_phy`
     - The number of corrected bits on this port according to active FEC
       (RS/FC). If this counter is increasing, it implies that the link between
       the NIC and the network is suffering from high BER. The corrected bit
       rate is the number of `rx_corrected_bits_phy` divided by the number of
       `rx_bits_phy` on a specific time frame.
     - Error

   * - `rx_err_lane_[l]_phy`
     - This counter counts the number of physical raw errors per lane l index.
       The counter counts errors before FEC corrections. If this counter is
       increasing, it implies that the link between the NIC and the network is
       suffering from high BER, and that traffic might be lost. You may need to
       replace the cable/transceiver. Please check in accordance with
       `rx_corrected_bits_phy`.
     - Error

   * - `rx_global_pause`
     - The number of pause packets received on the physical port. If this
       counter is increasing, it implies that the network is congested and
       cannot absorb the traffic coming from the adapter. Note: This counter is
       only enabled when global pause mode is enabled.
     - Informative

   * - `rx_global_pause_duration`
     - The duration of pause received (in microSec) on the physical port. The
       counter represents the time the port did not send any traffic. If this
       counter is increasing, it implies that the network is congested and
       cannot absorb the traffic coming from the adapter. Note: This counter is
       only enabled when global pause mode is enabled.
     - Informative

   * - `tx_global_pause`
     - The number of pause packets transmitted on a physical port. If this
       counter is increasing, it implies that the adapter is congested and
       cannot absorb the traffic coming from the network. Note: This counter is
       only enabled when global pause mode is enabled.
     - Informative

   * - `tx_global_pause_duration`
     - The duration of pause transmitter (in microSec) on the physical port.
       Note: This counter is only enabled when global pause mode is enabled.
     - Informative

   * - `rx_global_pause_transition`
     - The number of times a transition from Xoff to Xon on the physical port
       has occurred. Note: This counter is only enabled when global pause mode
       is enabled.
     - Informative

   * - `rx_if_down_packets`
     - The number of received packets that were dropped due to interface down.
     - Informative

Priority Port Counters
----------------------
The following counters are physical port counters that are counted per L2
priority (0-7).

**Note:** `p` in the counter name represents the priority.

.. flat-table:: Priority Port Counter Table
   :widths: 2 3 1

   * - Counter
     - Description
     - Type

   * - `rx_prio[p]_bytes`
     - The number of bytes received with priority p on the physical port.
     - Informative

   * - `rx_prio[p]_packets`
     - The number of packets received with priority p on the physical port.
     - Informative

   * - `tx_prio[p]_bytes`
     - The number of bytes transmitted on priority p on the physical port.
     - Informative

   * - `tx_prio[p]_packets`
     - The number of packets transmitted on priority p on the physical port.
     - Informative

   * - `rx_prio[p]_pause`
     - The number of pause packets received with priority p on a physical port.
       If this counter is increasing, it implies that the network is congested
       and cannot absorb the traffic coming from the adapter. Note: This counter
       is available only if PFC was enabled on priority p.
     - Informative

   * - `rx_prio[p]_pause_duration`
     - The duration of pause received (in microSec) on priority p on the
       physical port. The counter represents the time the port did not send any
       traffic on this priority. If this counter is increasing, it implies that
       the network is congested and cannot absorb the traffic coming from the
       adapter. Note: This counter is available only if PFC was enabled on
       priority p.
     - Informative

   * - `rx_prio[p]_pause_transition`
     - The number of times a transition from Xoff to Xon on priority p on the
       physical port has occurred. Note: This counter is available only if PFC
       was enabled on priority p.
     - Informative

   * - `tx_prio[p]_pause`
     - The number of pause packets transmitted on priority p on a physical port.
       If this counter is increasing, it implies that the adapter is congested
       and cannot absorb the traffic coming from the network. Note: This counter
       is available only if PFC was enabled on priority p.
     - Informative

   * - `tx_prio[p]_pause_duration`
     - The duration of pause transmitter (in microSec) on priority p on the
       physical port. Note: This counter is available only if PFC was enabled on
       priority p.
     - Informative

   * - `rx_prio[p]_buf_discard`
     - The number of packets discarded by device due to lack of per host receive
       buffers.
     - Informative

   * - `rx_prio[p]_cong_discard`
     - The number of packets discarded by device due to per host congestion.
     - Informative

   * - `rx_prio[p]_marked`
     - The number of packets ecn marked by device due to per host congestion.
     - Informative

   * - `rx_prio[p]_discards`
     - The number of packets discarded by device due to lack of receive buffers.
     - Informative

Device Counters
---------------
.. flat-table:: Device Counter Table
   :widths: 2 3 1

   * - Counter
     - Description
     - Type

   * - `rx_pci_signal_integrity`
     - Counts physical layer PCIe signal integrity errors, the number of
       transitions to recovery due to Framing errors and CRC (dlp and tlp). If
       this counter is raising, try moving the adapter card to a different slot
       to rule out a bad PCI slot. Validate that you are running with the latest
       firmware available and latest server BIOS version.
     - Error

   * - `tx_pci_signal_integrity`
     - Counts physical layer PCIe signal integrity errors, the number of
       transition to recovery initiated by the other side (moving to recovery
       due to getting TS/EIEOS). If this counter is raising, try moving the
       adapter card to a different slot to rule out a bad PCI slot. Validate
       that you are running with the latest firmware available and latest server
       BIOS version.
     - Error

   * - `outbound_pci_buffer_overflow`
     - The number of packets dropped due to pci buffer overflow. If this counter
       is raising in high rate, it might indicate that the receive traffic rate
       for a host is larger than the PCIe bus and therefore a congestion occurs.
     - Informative

   * - `outbound_pci_stalled_rd`
     - The percentage (in the range 0...100) of time within the last second that
       the NIC had outbound non-posted reads requests but could not perform the
       operation due to insufficient posted credits.
     - Informative

   * - `outbound_pci_stalled_wr`
     - The percentage (in the range 0...100) of time within the last second that
       the NIC had outbound posted writes requests but could not perform the
       operation due to insufficient posted credits.
     - Informative

   * - `outbound_pci_stalled_rd_events`
     - The number of seconds where `outbound_pci_stalled_rd` was above 30%.
     - Informative

   * - `outbound_pci_stalled_wr_events`
     - The number of seconds where `outbound_pci_stalled_wr` was above 30%.
     - Informative

   * - `dev_out_of_buffer`
     - The number of times the device owned queue had not enough buffers
       allocated.
     - Error
