From owner-freebsd-hackers@FreeBSD.ORG Fri Sep 20 21:16:00 2013 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id 29B18AEF; Fri, 20 Sep 2013 21:16:00 +0000 (UTC) (envelope-from gnn@neville-neil.com) Received: from vps.hungerhost.com (vps.hungerhost.com [216.38.53.176]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id E400F224C; Fri, 20 Sep 2013 21:15:59 +0000 (UTC) Received: from [209.249.190.124] (port=56602 helo=gnnmac.hudson-trading.com) by vps.hungerhost.com with esmtpsa (TLSv1:AES128-SHA:128) (Exim 4.80.1) (envelope-from ) id 1VN83Q-0005Ei-1G; Fri, 20 Sep 2013 17:15:56 -0400 Content-Type: multipart/signed; boundary="Apple-Mail=_29BA3DEA-E25B-4508-A37B-5E1B8A859AA6"; protocol="application/pgp-signature"; micalg=pgp-sha1 Mime-Version: 1.0 (Mac OS X Mail 6.6 \(1510\)) Subject: Re: Network stack changes From: George Neville-Neil In-Reply-To: <20130919200859.GA68598@onelab2.iet.unipi.it> Date: Fri, 20 Sep 2013 17:15:55 -0400 Message-Id: <21E37353-EC5A-45FE-89CD-DD3E5B8C4E86@neville-neil.com> References: <521E41CB.30700@yandex-team.ru> <6BDA4619-783C-433E-9819-A7EAA0BD3299@neville-neil.com> <20130914142802.GC71010@onelab2.iet.unipi.it> <6ACABEE8-2C0F-435C-8766-7010A8E13042@neville-neil.com> <20130919200859.GA68598@onelab2.iet.unipi.it> To: Luigi Rizzo X-Mailer: Apple Mail (2.1510) X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - vps.hungerhost.com X-AntiAbuse: Original Domain - freebsd.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - neville-neil.com X-Get-Message-Sender-Via: vps.hungerhost.com: authenticated_id: gnn@neville-neil.com X-Mailman-Approved-At: Fri, 20 Sep 2013 22:57:35 +0000 Cc: "Alexander V. Chernikov" , Adrian Chadd , Andre Oppermann , "freebsd-hackers@freebsd.org" , "freebsd-arch@freebsd.org" , Luigi Rizzo , "Andrey V. Elsukov" , Gleb Smirnoff , FreeBSD Net , Olivier Cochard-Labb? X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 20 Sep 2013 21:16:00 -0000 --Apple-Mail=_29BA3DEA-E25B-4508-A37B-5E1B8A859AA6 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii On Sep 19, 2013, at 16:08 , Luigi Rizzo wrote: > On Thu, Sep 19, 2013 at 03:54:34PM -0400, George Neville-Neil wrote: >>=20 >> On Sep 14, 2013, at 15:24 , Luigi Rizzo wrote: >>=20 >>>=20 >>>=20 >>> On Saturday, September 14, 2013, Olivier Cochard-Labb? = wrote: >>>> On Sat, Sep 14, 2013 at 4:28 PM, Luigi Rizzo = wrote: >>>>>=20 >>>>> IXIA ? For the timescales we need to address we don't need an = IXIA, >>>>> a netmap sender is more than enough >>>>>=20 >>>>=20 >>>> The great netmap generates only one IP flow (same src/dst IP and = same >>>> src/dst port). >>>=20 >>> True the sample app generates only one flow but it is trivial to = modify it to generate multiple flows. My point was, we have the ability = to generate high rate traffic, as long as we do tolerate a .1-1us = jitter. Beyond that, you do need some ixia-like solution. >>>=20 >>=20 >> On the bandwidth side, can a modern sender with netmap really do a = full 10G? I hate the cost of an >> IXIA but I have not been able to destroy our stack as effectively = with anything else. >=20 > yes george, you can download the picobsd image >=20 > = http://info.iet.unipi.it/~luigi/netmap/20120618-netmap-picobsd-head-amd64.= bin >=20 > and try for yourself. >=20 > Granted this does not have all the knobs of an ixia but it can > surely blast the full 14.88 Mpps to the link, and it only takes a > bit of userspace programming to generate reasonably arbitrary streams > of packets. A netmap sender/receiver is not CPU bound even with 1 = core. >=20 Interesting. It's on my todo. Best, George --Apple-Mail=_29BA3DEA-E25B-4508-A37B-5E1B8A859AA6 Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP using GPGMail -----BEGIN PGP SIGNATURE----- Comment: GPGTools - http://gpgtools.org iEYEARECAAYFAlI8uwwACgkQYdh2wUQKM9JIWACgpOJvsdpta8LeagEQjmfUqK6A 3UgAn3Gtxy5iTWaOG3Fm795QRtdlskbC =nLsl -----END PGP SIGNATURE----- --Apple-Mail=_29BA3DEA-E25B-4508-A37B-5E1B8A859AA6--