Date: Fri, 29 Nov 2013 19:55:32 +0100 From: =?ISO-8859-1?Q?Ermal_Lu=E7i?= <eri@freebsd.org> To: Oleg Moskalenko <mom040267@gmail.com> Cc: freebsd-net <freebsd-net@freebsd.org>, Tim Kientzle <kientzle@freebsd.org>, "freebsd-current@freebsd.org" <freebsd-current@freebsd.org> Subject: Re: [PATCH] SO_REUSEADDR and SO_REUSEPORT behaviour Message-ID: <CAPBZQG2Ou1btHZdsYYEh9-pz%2BgrgpPG3a6VPEkj8Ygguh=Q4VQ@mail.gmail.com> In-Reply-To: <CAPBZQG0=bcHyv7aZse=WKfjk5=6D2-%2B6EQHiAaDZqGtaodhMMA@mail.gmail.com> References: <CAPBZQG29BEJJ8BK=gn%2Bg_n5o7JSnPbsKQ-=3=6AkFOxzt%2B=wGQ@mail.gmail.com> <4053E074-EDC5-49AB-91A7-E50ABE36602E@freebsd.org> <CALDtMrKvwXW-ou8X7zsKx2ST=dKD7FqHvvnQtGo30znTWU%2BVQQ@mail.gmail.com> <CAPBZQG0=bcHyv7aZse=WKfjk5=6D2-%2B6EQHiAaDZqGtaodhMMA@mail.gmail.com>
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Also some discussions and improvements to it. http://unix.derkeiler.com/Mailing-Lists/FreeBSD/net/2013-09/msg00165.html On Fri, Nov 29, 2013 at 7:42 PM, Ermal Lu=E7i <eri@freebsd.org> wrote: > Well seems Dragonfly has some version of it already from commit [1]. > > In FreeBSD there is the framework for this with by defining PCBGROUP. > Also the explanation of it at [2] and [3]. > It can achieve approximately the same features of SO_RESUSEPORT of linux. > The only thing missing is the marketing behind it and i think and better > RSS support. > By looking at dates the support is there before linux so all you guys > looking for it can experiment with it. > > What i was trying to accomplish was something else from performance > improvement and > maybe put a sysctl behind it to make it more acceptable.. > > [1] > http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/740d1d9f7b7bf9c9c= 021abb8197718d7a2d441c9 > [2] > http://fxr.watson.org/fxr/source/netinet/in_pcbgroup.c?im=3Dbigexcerpts#L= 51 > [3] http://lists.freebsd.org/pipermail/svn-src-head/2011-June/028190.html > > > On Fri, Nov 29, 2013 at 7:03 PM, Oleg Moskalenko <mom040267@gmail.com>wro= te: > >> Tim, you are wrong. Read what is "multicast" definition, and read how UD= P >> and TCP sockets work in Linux 3.9+ kernels. >> >> Oleg . >> >> >> On Fri, Nov 29, 2013 at 9:59 AM, Tim Kientzle <kientzle@freebsd.org>wrot= e: >> >>> >>> On Nov 29, 2013, at 4:04 AM, Ermal Lu=E7i <eri@freebsd.org> wrote: >>> >>> > Hello, >>> > >>> > since SO_REUSEADDR and SO_REUSEPORT are supposed to allow two daemons >>> to >>> > share the same port and possibly listening ip =85 >>> >>> These flags are used with TCP-based servers. >>> >>> I=92ve used them to make software upgrades go more smoothly. >>> Without them, the following often happens: >>> >>> * Old server stops. In the process, all of its TCP connections are >>> closed. >>> >>> * Connections to old server remain in the TCP connection table until th= e >>> remote end can acknowledge. >>> >>> * New server starts. >>> >>> * New server tries to open port but fails because that port is =93still= in >>> use=94 by connections in the TCP connection table. >>> >>> With these flags, the new server can open the port even though >>> it is =93still in use=94 by existing connections. >>> >>> >>> > This is not the case today. >>> > Only multicast sockets seem to have the behaviour of broadcasting the >>> data >>> > to all sockets sharing the same properties through these options! >>> >>> That is what multicast is for. >>> >>> If you want the same data sent to all listeners, then >>> that is multicast behavior and you should be using >>> a multicast socket. >>> >>> > The patch at [1] implements/corrects the behaviour for UDP sockets. >>> >>> You=92re trying to turn all UDP sockets with those options >>> into multicast sockets. >>> >>> If you want a multicast socket, you should ask for one. >>> >>> Tim >>> >>> _______________________________________________ >>> freebsd-net@freebsd.org mailing list >>> http://lists.freebsd.org/mailman/listinfo/freebsd-net >>> To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" >>> >> >> > > > -- > Ermal > --=20 Ermal
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