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Date:      Mon, 3 Nov 2014 13:18:17 -0800
From:      Luigi Rizzo <rizzo@iet.unipi.it>
To:        David <dajose22@gmail.com>
Cc:        "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>
Subject:   Re: How do I poll() over just one ring on netmap?
Message-ID:  <CA%2BhQ2%2Bg6qkD174KmY-o39FDknoKDyrLiimadDU%2Bz6s6JiSTJwQ@mail.gmail.com>
In-Reply-To: <CAHYV_8znPK_ee_3U4JKZ5UPZ8uKroedGO80-ErzLvvgWWMZH=g@mail.gmail.com>
References:  <CAHYV_8znPK_ee_3U4JKZ5UPZ8uKroedGO80-ErzLvvgWWMZH=g@mail.gmail.com>

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On Monday, November 3, 2014, David <dajose22@gmail.com> wrote:

> hi,
>
> I've been working with netmap with great results. My problem now is that =
I
> haven't figure out how to poll on just one TX ring to check for space
> available.


You have to specify a single ring index as the argument to the NIOCREGIF
ioctl (or equivalent info as the name to nm_open(), e.g. netmap:ix0-2 to
revrivr notifications from the third ring.

Note that pkt-gen is not yet able to support one ring at a time (it will
always use all rings, either with a single thread for all or with one
thread per ring).

Cheers
Luigi


> I have several tx ring connected. I've been working with the pkt-gen
> example and I found a call to poll(), but when I step into the code that
> handles that I notice it is going over all the available rings, regardles=
s
> I just want to send using one.
>
> How do I poll() over just one ring?
>
> Thanks
>
> --
> David D=C3=ADaz Barquero
>
> Ingenier=C3=ADa en Computadores
> Tecnol=C3=B3gico de Costa Rica
> _______________________________________________
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--=20
-----------------------------------------+-------------------------------
 Prof. Luigi RIZZO, rizzo@iet.unipi.it  . Dip. di Ing. dell'Informazione
 http://www.iet.unipi.it/~luigi/        . Universita` di Pisa
 TEL      +39-050-2211611               . via Diotisalvi 2
 Mobile   +39-338-6809875               . 56122 PISA (Italy)
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