Date: Thu, 4 Feb 2016 12:34:08 -0200 From: Eduardo Meyer <dudu.meyer@gmail.com> To: Luigi Rizzo <rizzo@iet.unipi.it> Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: Re: dev.netmap.buf_size and packett size from host Message-ID: <CAEqdE_7aN4DEa2fLBnamBSeEK5UT8ePdBFyKu=R75FdXnPB7hg@mail.gmail.com> In-Reply-To: <CA%2BhQ2%2Bg0FujuKvzxH_Nae6Pq2X%2BzJQWOrrY3RSefDAiwssASxg@mail.gmail.com> References: <CAEqdE_6ZVTbLebLoNbQUy916Pv5up5A9vrymrV4yE_DBXZJ-yw@mail.gmail.com> <CA%2BhQ2%2Bg0FujuKvzxH_Nae6Pq2X%2BzJQWOrrY3RSefDAiwssASxg@mail.gmail.com>
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mtu is good, TSO was on, thank you will retest right now. which other port features should I disable? I only disabled txcsum and rxcsum before, now tso on the list, anything else in netmap mode? On Thu, Feb 4, 2016 at 12:29 PM, Luigi Rizzo <rizzo@iet.unipi.it> wrote: > Make sure you disable TSO on the interface used in netmap > mode, and then check that you use an MTU of 1500 on that > interface. > You should not receive frames larger than MTU coming from > the host in these conditions. > > cheers > luigi > > > On Thu, Feb 4, 2016 at 3:26 PM, Eduardo Meyer <dudu.meyer@gmail.com> > wrote: > > hello, > > > > I have a netmap application which has host mode bridge/fwd, with default > > settings I have the following error some often: > > > > 884.260394 [2950] netmap_transmit igb1 from_host, drop packet > > size 2962 > 2048 > > > > the only application which relies on host mode is bird, so those packets > > are probably from bird daemon, when I get those errors I get bird > sessions > > failing and restart > > > > I raised dev.netmap.buf_size to 5000 it ajusted to 5120, things got > better > > but I still have logs: > > > > netmap_transmit igb1 from_host, drop packet size 5858 > 5120 > > > > Now the main question is, when dev.netmap.buf_size is 2048 the > application > > uses 1.3G of RAM but when I raise to 5120 it uses 3G of RAM. > > > > So I need to understand, is this packet size really related from what I > get > > from the application packets coming from host to netmap? If so can I > allow > > for bigger sizes, like 16k (lo0 mtu) without pre-alloc so much more RAM? > > > > thank you > > > > E. Meyer > > _______________________________________________ > > freebsd-net@freebsd.org mailing list > > https://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 +39-050-2217533 . via Diotisalvi 2 > Mobile +39-338-6809875 . 56122 PISA (Italy) > -----------------------------------------+------------------------------- > -- =========== Eduardo Meyer pessoal: dudu.meyer@gmail.com profissional: ddm.farmaciap@saude.gov.br
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