Date: Sun, 29 Jun 2014 16:52:53 +0200 From: Luigi Rizzo <rizzo@iet.unipi.it> To: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> Cc: "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org> Subject: Re: ipfw pipe config bw tun0 Message-ID: <CA%2BhQ2%2BgREg_L4Ar021EOSjcc9xPOPinpDeTefpP0B4zz4%2B0_Nw@mail.gmail.com> In-Reply-To: <alpine.BSF.2.00.1406291615530.88662@wojtek.tensor.gdynia.pl> References: <alpine.BSF.2.00.1406291615530.88662@wojtek.tensor.gdynia.pl>
next in thread | previous in thread | raw e-mail | index | archive | help
On Sun, Jun 29, 2014 at 4:16 PM, Wojciech Puchar < wojtek@wojtek.tensor.gdynia.pl> wrote: > i tried to use ipfw dummynet as described in manual > > --- > If a device name is specified instead of a numeric value, as in > > ipfw pipe 1 config bw tun0 > > then the transmit clock is supplied by the specified device. > At > the moment only the tun(4) device supports this functionalit= y, > for use in conjunction with ppp(8). > > ---- > > > got "no if support" error message. what i missed? > you missed =E2=80=8Bnothing -- it's just that no device that i know of still implements the feature. i implemented it 15 years ago and enabled it on the 'ed' device driver only. What it needed is a notification on the transmit interrupt to kick the pipe and tell it how many packets went out (at the time 'ed' only supported one packet at a time, so the code might make assumptions).=E2=80=8B It might need a bit of redesign these days to make it work efficiently with fast pipes and deep interface queues. cheers luigi
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?CA%2BhQ2%2BgREg_L4Ar021EOSjcc9xPOPinpDeTefpP0B4zz4%2B0_Nw>