Date: Mon, 16 Jun 2014 16:30:59 +0100 From: Carlos Ferreira <carlosmf.pt@gmail.com> To: Luigi Rizzo <rizzo@iet.unipi.it> Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: Re: netmap Message-ID: <CAJpYY6Usfv98OEsgXedP5MCqdJsd_rz7N4EhgRmP2NcxZ9eQ9g@mail.gmail.com> In-Reply-To: <20140614101523.GD22187@onelab2.iet.unipi.it> References: <CAJpYY6Wj6NkYVdPzitswLQ2oVoX9JAv5tCnzbP6icsgJTdfm8Q@mail.gmail.com> <CA%2BhQ2%2BhHz2FKUkCRnHiGAVxZqxY5WHPPo87mVgSnSmPzovNLWw@mail.gmail.com> <CAJpYY6V6Ewc%2BXQYBi3BQbFtWgLiFKN_qmBLjAx1HyWhB9Q0vcg@mail.gmail.com> <CAJpYY6VJ9ih1ON1s1mnzrc-P7Xa_vsVS3UC49gnii0cLX%2B=TNA@mail.gmail.com> <20140614101523.GD22187@onelab2.iet.unipi.it>
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Ok, thanks for the enlightenment regarding the loss of performance.
One question, just to be sure. Does the kernel module contains the VALA
switch code? Or do I need to compile extra code to have the switch working?
Also, where can I find the documentation to use the Vala Switch?
Once again, thank you for the support.
On 14 June 2014 11:15, Luigi Rizzo <rizzo@iet.unipi.it> wrote:
> On Fri, Jun 13, 2014 at 10:55:54AM +0100, Carlos Ferreira wrote:
> > Hello Luigi (and to all)
> >
> > I was able to successfully compile the netmap module for OpenWRT but
> > without drivers. According to the information in the README file which
> > comes with the source, the drivers are not necessary but with some
> "reduced
> > performance".
> >
> > I would like to ask how much degradation should be expected. I would like
> > to run some tests to see if everything is ok and if the port was
> successful.
>
> At 10Gbit we are easily talking about a 5x loss of efficiency.
>
> At 1Gbit probably the gap is a bit smaller, also because a
> lot of low-end device have severe bus bandwidth limitations.
>
> I would be interested in seeing what kind of performance you
> get on your openwrt box with the following commands
>
> 1. just a sender on a software switch
> pkt-gen -i vale0:a -f tx
>
> 2. sender and receiver on a software switch
> pkt-gen -i vale0:a -f tx &
> pkt-gen -i vale0:b -f rx &
>
> 3. sender and receiver on a netmap pipe
> pkt-gen -i vale0:x{0 -f tx &
> pkt-gen -i vale0:x}0 -f rx &
>
> 4. sending on a physical device (make sure something is attached
> to the output port. Also this is tricky because many openwrt boxes
> have a switch on the output so you need to use a unicast destination
> MAC address)
>
> pkt-gen -i eth0 -f tx -D 00:11:22:33:44:55
>
> cheers
> luigi
>
> >
> > Thank you for the help!
> >
> >
> >
> > On 12 June 2014 11:48, Carlos Ferreira <carlosmf.pt@gmail.com> wrote:
> >
> > > First of all, thank you for the quick answer!
> > >
> > > I will try it myself to compile just the netmap module without the
> drivers
> > > and report the results back to you.
> > >
> > > Once again, thank you!
> > >
> > >
> > > On 12 June 2014 11:41, Luigi Rizzo <rizzo@iet.unipi.it> wrote:
> > >
> > >>
> > >>
> > >>
> > >> On Thu, Jun 12, 2014 at 12:35 PM, Carlos Ferreira <
> carlosmf.pt@gmail.com>
> > >> wrote:
> > >>
> > >>> Hello!
> > >>>
> > >>> First of all, to Luigi and the dev team, great piece of work that
> netmap
> > >>> is! This is a piece of software that I was looking for quite some
> time.
> > >>> Your team effort is appreciated!
> > >>>
> > >>> Now the question.
> > >>> I know that this is a FreeBSD mailing list but I was wondering,
> since you
> > >>> have a PKGBUILD file for ArchLinux, could someone in your team do the
> > >>> same
> > >>> for OpenWRT? Netmap seems to be a piece of software which would come
> in
> > >>> handy, to develop applications and protocols for the OpenWRT distro.
> > >>> Since OpenWRT uses uClib, I don't really know if it is possible to
> > >>> compile
> > >>> it.
> > >>> Help is appreciated!
> > >>>
> > >>>
> > >> ???i expect it will be trivial to compile netmap for openwrt,
> > >> because it is just a piece of kernel code and the userspace
> > >> has little or no dependencies.
> > >> Another story is to write specific netmap extensions for the
> > >> driver in use -- that might require a little bit of work
> > >> though not much, knowing the driver.
> > >>
> > >> I am afraid we currently we do not have the time and manpower
> > >> to set up a build environment and give it a try.
> > >>
> > >> cheers
> > >> luigi
> > >>
> > >>
> > >
> > >
> > > --
> > >
> > > Carlos Miguel Ferreira
> > > Researcher at Telecommunications Institute
> > > Aveiro - Portugal
> > > Work E-mail - cmf@av.it.pt
> > > Skype & GTalk -> carlosmf.pt@gmail.com
> > > LinkedIn -> http://www.linkedin.com/in/carlosmferreira
> > >
> >
> >
> >
> > --
> >
> > Carlos Miguel Ferreira
> > Researcher at Telecommunications Institute
> > Aveiro - Portugal
> > Work E-mail - cmf@av.it.pt
> > Skype & GTalk -> carlosmf.pt@gmail.com
> > LinkedIn -> http://www.linkedin.com/in/carlosmferreira
> > _______________________________________________
> > freebsd-net@freebsd.org mailing list
> > http://lists.freebsd.org/mailman/listinfo/freebsd-net
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>
--
Carlos Miguel Ferreira
Researcher at Telecommunications Institute
Aveiro - Portugal
Work E-mail - cmf@av.it.pt
Skype & GTalk -> carlosmf.pt@gmail.com
LinkedIn -> http://www.linkedin.com/in/carlosmferreira
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