From owner-freebsd-net@FreeBSD.ORG  Wed Jan 28 00:29:19 2015
Return-Path: <owner-freebsd-net@FreeBSD.ORG>
Delivered-To: freebsd-net@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTPS id 05D6C54C
 for <freebsd-net@freebsd.org>; Wed, 28 Jan 2015 00:29:19 +0000 (UTC)
Received: from marcos.anarc.at (mail.orangeseeds.org [72.0.72.144])
 by mx1.freebsd.org (Postfix) with ESMTP id 9865A2B1
 for <freebsd-net@freebsd.org>; Wed, 28 Jan 2015 00:29:18 +0000 (UTC)
Received: by marcos.anarc.at (Postfix, from userid 1000)
 id 224791A0070; Tue, 27 Jan 2015 19:29:14 -0500 (EST)
From: Antoine =?utf-8?Q?Beaupr=C3=A9?= <anarcat@koumbit.org>
To: Luigi Rizzo <rizzo@iet.unipi.it>
Subject: Re: is polling still a thing?
In-Reply-To: <20150127233240.GA22364@onelab2.iet.unipi.it>
References: <871tmgceup.fsf@marcos.anarc.at>
 <1422384769.867067950.y2iiuu53@frv34.fwdcdn.com>
 <87pp9zc1wk.fsf@marcos.anarc.at>
 <20150127223917.GA21883@onelab2.iet.unipi.it>
 <87h9vbbze1.fsf@marcos.anarc.at>
 <20150127233240.GA22364@onelab2.iet.unipi.it>
User-Agent: Notmuch/0.18.2 (http://notmuchmail.org) Emacs/24.4.1
 (x86_64-pc-linux-gnu)
Date: Tue, 27 Jan 2015 19:29:14 -0500
Message-ID: <87bnljbvdx.fsf@marcos.anarc.at>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable
Cc: freebsd-net@freebsd.org, wishmaster <artemrts@ukr.net>
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.18-1
Precedence: list
List-Id: Networking and TCP/IP with FreeBSD <freebsd-net.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-net>,
 <mailto:freebsd-net-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-net/>
List-Post: <mailto:freebsd-net@freebsd.org>
List-Help: <mailto:freebsd-net-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
 <mailto:freebsd-net-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 28 Jan 2015 00:29:19 -0000

On 2015-01-27 18:32:40, Luigi Rizzo wrote:
> A netmap-aware NIC has no problem dealing with high PPS rates,
> deliver them through the fat pipe HHH to netmap-ipfw in userspace,
> which does the filtering and drops the junk.  The remaining part
> is reinjected  through another netmap port into the host stack,
> which is the actual bottleneck.  Presumably at this point the amount
> of residual traffic is sustainable by the kernel.  netmap-ipfw is
> simmetric so it supports traffic in the other direction too.
> another host netmap port. Presumably at thi

[trimmed?]

uh! so that's pretty amazing. :) is there some tutorial that's available
for this somewhere? i looked briefly at the netmap-ipfw README, and
couldn't quite figure it out.

thanks!

a.

--=20
Au nom de l'=C3=A9tat, la force s'appelle droit.
Au main de l'individu, elle s'appelle crime.
                        - Max Stirner