Date: Tue, 30 Dec 2014 15:43:41 +0000 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: Regarding Netmap internal memory allocation. Message-ID: <CAJpYY6UGuzVY%2B=_m2RhOfhR40NHxv6uM%2BfWeJpOGkj9DDXWKiw@mail.gmail.com> In-Reply-To: <CA%2BhQ2%2BiD=2g65ScRBzVVYGRu=jmxksCtMNmObTTnnXfG=Yuu3g@mail.gmail.com> References: <CAJpYY6XmOnYX4bm=YyXr5hoiFLXhoEFXDa44Z_Fn1fHNj8G5_w@mail.gmail.com> <CAJpYY6UH4bU9xYBsAgZm6_h1no9TDPJ9J2TNp4V19rYGrRGuuw@mail.gmail.com> <CA%2BhQ2%2BiD=2g65ScRBzVVYGRu=jmxksCtMNmObTTnnXfG=Yuu3g@mail.gmail.com>
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Ok thanks. I was hoping not having to recompile the module, but it's ok.
Thank you for the info!
On 30 December 2014 at 15:38, Luigi Rizzo <rizzo@iet.unipi.it> wrote:
> you can reduce the amount of ram (buffers, mostly) by
> tweaking the values in netmap_mem2.c ::
> struct netmap_obj_params netmap_params[NETMAP_POOLS_NR] = {
> ...
> }
>
> or you can simply modify the constant
>
> netmap_mem2.h:#define NETMAP_BUF_MAX_NUM 20*4096*2
>
> to something smaller that suits an openwrt box
> (in which i am very interested, as I'd like to deploy one of these soon)
>
> cheers
> luigi
>
>
> On Tue, Dec 30, 2014 at 4:12 PM, Carlos Ferreira <carlosmf.pt@gmail.com>
> wrote:
> > Update:
> >
> > I noticed that the netmap module was still crashing, after changing the
> > OpenWRT VM ram to 256MB. I now raised to 1GB and it no longer crashed.
> The
> > netmap module is now consuming about 350MB of Ram, which for my
> objectives
> > is just too much...
> >
> > On 30 December 2014 at 14:06, Carlos Ferreira <carlosmf.pt@gmail.com>
> wrote:
> >
> >> To Luigi and to whom may be able to help
> >>
> >> Hello all.
> >>
> >> Is it possible to reduce the size of the memory buffer allocated by the
> >> netmap module?
> >> I'm asking this because I was implementing some testing code, using NICs
> >> and a Tap device in an OpenWRT VM with 64MB of RAM.
> >> Because of the small RAM amount, the nm_open crashed when the program
> >> tried to netmap the tap device, after I previously netmapped one NIC
> >> successfully.
> >> After the crash, I bumped the VM RAM to 256MB and the test program ran
> >> well, but not without me noticing that the VM RAM consumption was
> >> increased about 90 MB by netmap.
> >>
> >> Resuming, I want to know if there is a way to reduce the memory buffer
> >> allocation, without recompiling the netmap kernel module.
> >>
> >> Thank you for the attention.
> >>
> >> --
> >>
> >> 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
> > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org"
>
>
>
> --
> -----------------------------------------+-------------------------------
> 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)
> -----------------------------------------+-------------------------------
>
--
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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