netdev - Re: [patch net-next v2 2/4] net/sched: Introduce sample tc action

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Message-ID: <20170124083318.GB25022@penelope.horms.nl>
Date:   Tue, 24 Jan 2017 09:33:19 +0100
From:   Simon Horman <simon.horman@...ronome.com>
To:     Jiri Pirko <jiri@...nulli.us>
Cc:     netdev@...r.kernel.org, davem@...emloft.net, yotamg@...lanox.com,
        idosch@...lanox.com, eladr@...lanox.com, nogahf@...lanox.com,
        ogerlitz@...lanox.com, jhs@...atatu.com, geert+renesas@...der.be,
        stephen@...workplumber.org, xiyou.wangcong@...il.com,
        linux@...ck-us.net, roopa@...ulusnetworks.com,
        john.fastabend@...il.com, mrv@...atatu.com
Subject: Re: [patch net-next v2 2/4] net/sched: Introduce sample tc action

On Mon, Jan 23, 2017 at 11:07:09AM +0100, Jiri Pirko wrote:
> From: Yotam Gigi <yotamg@...lanox.com>
> 
> This action allows the user to sample traffic matched by tc classifier.
> The sampling consists of choosing packets randomly and sampling them using
> the psample module. The user can configure the psample group number, the
> sampling rate and the packet's truncation (to save kernel-user traffic).
> 
> Example:
> To sample ingress traffic from interface eth1, one may use the commands:
> 
> tc qdisc add dev eth1 handle ffff: ingress
> 
> tc filter add dev eth1 parent ffff: \
> 	   matchall action sample rate 12 group 4
> 
> Where the first command adds an ingress qdisc and the second starts
> sampling randomly with an average of one sampled packet per 12 packets on
> dev eth1 to psample group 4.
> 
> Signed-off-by: Yotam Gigi <yotamg@...lanox.com>
> Signed-off-by: Jiri Pirko <jiri@...lanox.com>
> Acked-by: Jamal Hadi Salim <jhs@...atatu.com>

Reviewed-by: Simon Horman <simon.horman@...ronome.com>

Is the tc user-space (iproute2) code available yet?