Date: Mon, 19 Oct 2015 16:46:56 +0800 From: Sepherosa Ziehau <sepherosa@gmail.com> To: Jim Thompson <jim@netgate.com> Cc: Ian Smith <smithi@nimnet.asn.au>, "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: Re: nice stuff from cloudflare (and, we need something like ethtool!) Message-ID: <CAMOc5cxHPs%2BPgS%2BzonjrfE%2BuCTgSafpC_j1sFP9k_CjGpE9=pw@mail.gmail.com> In-Reply-To: <D6A89176-A6D0-4215-B434-16D2482184BA@netgate.com> References: <CA%2BhQ2%2BhFHeS_%2BCLS6Y7XSVUPQjppd6pPmgPHWy8fw%2BA5hK%2BMRQ@mail.gmail.com> <561F6BFB.7080103@freebsd.org> <20151016154512.T15983@sola.nimnet.asn.au> <D6A89176-A6D0-4215-B434-16D2482184BA@netgate.com>
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On Fri, Oct 16, 2015 at 1:25 PM, Jim Thompson <jim@netgate.com> wrote: > > > >> On Oct 16, 2015, at 12:06 AM, Ian Smith <smithi@nimnet.asn.au> wrote: >> >>> On Thu, 15 Oct 2015 17:03:55 +0800, Julian Elischer wrote: >>>> On 10/10/15 10:59 PM, Luigi Rizzo wrote: >>>> the nice folks at cloudflare implemented a nice feature >>>> in netmap that puts some queues of the NIC in netmap mode >>>> leaving others attached to the host stack >>>> >>>> https://blog.cloudflare.com/single-rx-queue-kernel-bypass-with-netmap/ >>>> >>>> and use ethtool (and native NIC filters) to steer traffic around. >>>> [FWIW, the chelsio native netmap driver is similar except that >>>> the netmap queue has a different MAC address] >>>> >>>> While their code was developed on linux, it should run >>>> almost unmodified on FreeBSD (and we plan to import it soon), >>>> except for the fact that we don't have ethtool hence no >>>> device-independent mechanism to configure traffic steering. >>>> >>>> We really need to address the latter. >>> >>> I suspect the answer may be a device dependent sysctl >> >> Interesting; care to flesh out your ideas a bit on how that might work? >> >> I've done nothing more than skim ethtool(8) on linuxcommand.org, and >> wondered why its functionality wasn't incorporated into ifconfig, but >> then ifconfig (on FreeBSD anyway) is tending towards obesity already > > Luigi already did netlink sockets for FreeBSD. > > https://github.com/luigirizzo/netlink-freebsd ha, the netlink for BSD, interesting :) -- Tomorrow Will Never Die
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