Date: Tue, 17 Jun 2014 12:00:36 +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: <CAJpYY6XAJzJQUwF6NFLVbZXVxxk%2Bd3pwhg35Rf-XNU%2BYuLaYfA@mail.gmail.com> In-Reply-To: <CAJpYY6Usfv98OEsgXedP5MCqdJsd_rz7N4EhgRmP2NcxZ9eQ9g@mail.gmail.com> 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> <CAJpYY6Usfv98OEsgXedP5MCqdJsd_rz7N4EhgRmP2NcxZ9eQ9g@mail.gmail.com>
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Just a remainder, so that the question doesn't get lost in time.
On 16 June 2014 16:30, Carlos Ferreira <carlosmf.pt@gmail.com> wrote:
> 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
>
--
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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