Date: Tue, 30 Dec 2014 15:12:30 +0000 From: Carlos Ferreira <carlosmf.pt@gmail.com> To: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: Re: Regarding Netmap internal memory allocation. Message-ID: <CAJpYY6UH4bU9xYBsAgZm6_h1no9TDPJ9J2TNp4V19rYGrRGuuw@mail.gmail.com> In-Reply-To: <CAJpYY6XmOnYX4bm=YyXr5hoiFLXhoEFXDa44Z_Fn1fHNj8G5_w@mail.gmail.com> References: <CAJpYY6XmOnYX4bm=YyXr5hoiFLXhoEFXDa44Z_Fn1fHNj8G5_w@mail.gmail.com>
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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
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