[dpdk-dev] [PATCH v3 4/4] app/testpmd: display/clear forwarding stats on demand

[Ferruh Yigit]

On 3/20/2019 12:44 PM, David Marchand wrote:
> On Wed, Mar 20, 2019 at 1:25 PM Ferruh Yigit <ferruh.yigit at intel.com
> <mailto:ferruh.yigit at intel.com>> wrote:
> 
>     On 3/20/2019 10:02 AM, David Marchand wrote:
>     > Add a new "show/clear fwd stats all" command to display fwd and port
>     > statistics on the fly.
> 
>     Won't this be duplicating existing commands:
>     "show port stats all|<port_id>"
>     "clear port stats all|<port_id>"
> 
>     What benefit "show/clear fwd stats all" adds against existing ones?
> 
> 
> Forwarding engines like "iofwd" maintain software statistics like "fwd_dropped"
> which gives you how much of the packets to be transmitted could not make it to
> the "wire".
> "show port stats" won't give you those stats.
> 
> You could stop/start the forwarding to get them, but when debugging you most
> likely do not want to stop the forwarding.
> I have been using this while tracking drops in a PVP setup.

I see, they are slightly different, no objection from me.