Date: Mon, 29 Jun 2015 20:55:19 +0300 From: Slawa Olhovchenkov <slw@zxy.spb.ru> To: Adrian Chadd <adrian.chadd@gmail.com> Cc: Navdeep Parhar <np@freebsd.org>, FreeBSD Net <freebsd-net@freebsd.org> Subject: Re: netmap custom RSS and custom packet info Message-ID: <20150629175519.GJ1647@zxy.spb.ru> In-Reply-To: <CAJ-VmonCC6ZDyFR6ix58LHmgra-dWAZ22bXur_0kJJpg=ySd3A@mail.gmail.com> References: <20150629151750.GD1647@zxy.spb.ru> <55917B43.70904@FreeBSD.org> <20150629171930.GH1647@zxy.spb.ru> <CAJ-Vmo=OY3rjTR%2Bc-WMT2k7_gNNrY-bBEKB=%2BAhnZ6t5aa1Jzw@mail.gmail.com> <20150629173402.GI1647@zxy.spb.ru> <CAJ-VmonCC6ZDyFR6ix58LHmgra-dWAZ22bXur_0kJJpg=ySd3A@mail.gmail.com>
index | next in thread | previous in thread | raw e-mail
On Mon, Jun 29, 2015 at 10:41:39AM -0700, Adrian Chadd wrote: > Hi, > > PPPoE will not be hashed according to RSS on the 1g/10g (igb, ixgbe) > intel hardware. you're going to have to figure out some other method > for traffic redistribution. I propose ephemeral but permanent NETMAP RX pipe with redistribution function from user-loadable kernel module. Hardware RxRing(i) => loadable hash => user-visible RxRing(j). As I perceive overhead is packet-parsing and hash computation + swaping of slot indexes (zero-copying between hardware ring and user-visible ring). In other (Tx) direction user-visible direct mapped to hardware ring. > If it's inside GRE, then it's IPv4/IPv6 and thus yes, you can do > symmetric hashing. But if it's raw pppoe coming in, you're SoL. This is will be only hashed tunnel IPs, yes? Not sessions inside tunnel.home | help
Want to link to this message? Use this
URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20150629175519.GJ1647>