Date: Tue, 30 Dec 2014 16:08:09 +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: <CAJpYY6WGO%2BW8%2BpPfNk1G9WUAO_6DVZf5iqbw-nFP7wnhfxBHQw@mail.gmail.com> In-Reply-To: <CAJpYY6Xy1AZi%2Bb7Dm%2Bn-TnvJJzWEjzQC35%2BntbLm2f4DST=yjQ@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> <CAJpYY6UGuzVY%2B=_m2RhOfhR40NHxv6uM%2BfWeJpOGkj9DDXWKiw@mail.gmail.com> <CAJpYY6Xy1AZi%2Bb7Dm%2Bn-TnvJJzWEjzQC35%2BntbLm2f4DST=yjQ@mail.gmail.com>
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By the way, another question.
Is there a way to not compile the code regarding the VALE switch? I'm only
interested in using netmap with Tap Devices and NICs, so I was hoping to
save some memory.
On 30 December 2014 at 15:47, Carlos Ferreira <carlosmf.pt@gmail.com> wrote:
> You mean netmap_mem2.c ? It was there where I found the NETMAP_BUF_MAX_NUM
> define.
>
>
>
> On 30 December 2014 at 15:43, Carlos Ferreira <carlosmf.pt@gmail.com>
> wrote:
>
>> 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
>>
>
>
>
> --
>
> 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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