netdev - Re: [PATCH] net: rocker: Add basic netdev counters

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Date:	Fri, 16 Jan 2015 16:08:03 -0800
From:	Scott Feldman <sfeldma@...il.com>
To:	David Ahern <dsahern@...il.com>
Cc:	Netdev <netdev@...r.kernel.org>, Jiri Pirko <jiri@...nulli.us>
Subject: Re: [PATCH] net: rocker: Add basic netdev counters - v2

On Fri, Jan 16, 2015 at 3:48 PM, David Ahern <dsahern@...il.com> wrote:
> On 1/16/15 4:41 PM, Scott Feldman wrote:
>>
>>
>> Thanks David.  I think this is good enough for first pass.  Longer
>> term, I'd like to see this replaced by stats read from device for each
>> port.
>
>
> Aren't there 2 sets of stats at play here?
> 1. packets punted to the control plane / CPU,
> 2. packets forwarded through the ports.

You're right.

> If you have the netdev counters resemble packets handled through the port it
> could be confusing to someone looking at packets handled by the OS.

Agreed, keep traditional netdev stats for pkts to/from OS.  Maybe
we're done then?

> What about having detailed counters local to the driver (i.e., ethtool -S)
> show the low level stats like packets handled through the port?

That sounds perfect, to use ethtool -S for extended device stats.
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