Date: Fri, 8 Jan 2016 00:13:56 -0800 From: Adrian Chadd <adrian.chadd@gmail.com> To: Mark Delany <c2h@romeo.emu.st> Cc: FreeBSD Net <freebsd-net@freebsd.org> Subject: Re: Does FreeBSD have sendmmsg or recvmmsg system calls? Message-ID: <CAJ-VmonYPhcN-gikuYQU_k5GaTAqTijoxR_0ORV4BZqsHMRJSg@mail.gmail.com> In-Reply-To: <20160108075815.3243.qmail@f5-external.bushwire.net> References: <20160104101747.58347.qmail@f5-external.bushwire.net> <20160104194044.GD3625@kib.kiev.ua> <20160104210741.32812.qmail@f5-external.bushwire.net> <CAP=KkTwfpjec2Tgnm4PRR3u8t4GEqN9Febm5HRcqapifBG-B6g@mail.gmail.com> <CA%2BhQ2%2Bh4NNz9tgSpjJdv7fXteq5tAR7o3LvjV=u08NHjRLPwmA@mail.gmail.com> <CAP=KkTzFUDsZwDDLD3n97xJW0qLVZMPduZGSX%2BeXC3UuLpVjMg@mail.gmail.com> <20160107161213.GZ3625@kib.kiev.ua> <CA%2BhQ2%2Bg6OB3MmZrW5hzNSnkcqKaKf1XGDraHfWXtSrowxKuL5g@mail.gmail.com> <20160107192840.GF3625@kib.kiev.ua> <20160108172323.W1815@besplex.bde.org> <20160108075815.3243.qmail@f5-external.bushwire.net>
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On 7 January 2016 at 23:58, Mark Delany <c2h@romeo.emu.st> wrote: > On 08Jan16, Bruce Evans allegedly wrote: >> If the NIC can't reach line rate > >> Network stack overheads are also enormous. > > Bruce makes some excellent points. > > I challenge anyone to get line rate UDP out of FBSD (or Linux) for a > 1G NIC yet alone a 10G NIC listening to a single port. It was exactly > my frustration with UDP performance that led me down the path of > *mmsg() and netmap. > > Frankly this is an opportunity for FBSD as UDP performance appears to > be a neglected area. I'm there, on 16 threads. I'd rather we do it on two or three, as a lot of time is wasted in producer/consumer locking. but yeah, 500k tx/rx should be doable per CPU with only locking changes. -a -adrian > > > Mark. > _______________________________________________ > 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"
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