igb stats double counting in 12-CURRENT r319025

[Sean Bruno]

On 06/03/17 01:25, Ben Woods wrote:
> Hi everyone,
> 
> I have noticed my networking statistics appear to be double counting on two
> of my FreeBSD 12-CURRENT boxes running r319025. Could someone please help
> me to find the problem (I believe it is likely to be a bug in the
> networking driver).
> 
> I discovered the double counting by comparing the output of "systat
> -ifstat" (which reports 988 KB/s) with the output of "iftop -B" (which
> reports 491 KB/s). I know that iftop is the correct one, because my
> internet speed only gives me around ~500 KB/s unfortunately.
> 
> # systat -ifstat -match igb0
> ...
>       Interface           Traffic               Peak                Total
>            igb0  in    988.008 KB/s        988.008 KB/s           36.295 GB
>                  out    16.953 KB/s         16.953 KB/s          295.774 GB
> 
> 
> # iftop -i igb0 -B
> ...
> TX:             cum:   31.7KB   peak:
> 9.69KB
> rates:   9.69KB  7.92KB  7.92KB
> RX:                    1.54MB
> 491KB
> 491KB   394KB   394KB
> 
> 
> The two interfaces in these boxes are:
> 
> $ pciconf -lvv | grep igb1 -A4
> igb1 at pci0:4:0:0:        class=0x020000 card=0x00008086 chip=0x15398086
> rev=0x03 hdr=0x00
>     vendor     = 'Intel Corporation'
>     device     = 'I211 Gigabit Network Connection'
>     class      = network
>     subclass   = ethernet
> 
> $ pciconf -lvv | grep igb0 -A4
> igb0 at pci0:8:0:0:        class=0x020000 card=0x15331849 chip=0x15338086
> rev=0x03 hdr=0x00
>     vendor     = 'Intel Corporation'
>     device     = 'I210 Gigabit Network Connection'
>     class      = network
>     subclass   = ethernet
> 
> Regards,
> Ben
> 
> --
> From: Benjamin Woods
> woodsb02 at gmail.com
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> 


Huh ... I'll look at this today.  If you get a chance, throw this over
into bugzilla and tag me in it.

sean


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