[Intel-wired-lan] Lots of rx_long_byte_count errors

[Przemek Kitszel]

On 11/16/23 19:43, Stephen Hemminger wrote:
> I am using builtin NIC on my little Brix box and surprised to see lots
> of byte count errors. Network seems a little sluggish at times.
> Do use locally NFS mounted NAS for storing things like kernel trees.
> 
> $ lspci | grep Ethernet
> 00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (13) I219-V (rev 20)
> ae:00.0 Ethernet controller: Intel Corporation Ethernet Controller I225-V (rev 01)
> 
> $ sudo ethtool -i enp174s0
> driver: igc
> version: 6.5.0-4-amd64
> firmware-version: 1045:740
> expansion-rom-version:
> bus-info: 0000:ae:00.0
> supports-statistics: yes
> supports-test: yes
> supports-eeprom-access: yes
> supports-register-dump: yes
> supports-priv-flags: yes
> 
> $ sudo ethtool -S enp174s0 | grep -v ': 0$'
> NIC statistics:
>       rx_packets: 729954
>       tx_packets: 222554
>       rx_bytes: 867670928

here

>       tx_bytes: 69174803
>       rx_broadcast: 5002
>       tx_broadcast: 37
>       rx_multicast: 11959
>       tx_multicast: 934
>       multicast: 11959
>       tx_tcp_seg_good: 1687
>       tx_flow_control_xon: 32
>       tx_flow_control_xoff: 31
>       rx_long_byte_count: 867670928

this value is the same as rx_bytes above

Looking at the code it also looks like it's just a long (perhaps opposed
to just int counter) rx bytes count. No mention on errors.

No idea how much value it brings, but that's it not an error.

>       tx_queue_0_packets: 22543
>       tx_queue_0_bytes: 2712687
>       tx_queue_1_packets: 4547
>       tx_queue_1_bytes: 1486617
>       tx_queue_2_packets: 103559
>       tx_queue_2_bytes: 36988065
>       tx_queue_3_packets: 14732
>       tx_queue_3_bytes: 13193520
>       rx_queue_0_packets: 112677
>       rx_queue_0_bytes: 152437202
>       rx_queue_1_packets: 91981
>       rx_queue_1_bytes: 130521460
>       rx_queue_2_packets: 231685
>       rx_queue_2_bytes: 250398158
>       rx_queue_3_packets: 11095
>       rx_queue_3_bytes: 10376491
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