Date: Thu, 5 Jun 2003 23:22:12 -0700 (PDT) From: Julian Elischer <julian@elischer.org> To: Vincent Jardin <vjardin@wanadoo.fr> Cc: freebsd-net@freebsd.org Subject: Re: Does Netgraph in FBSD 5.x SMP requires GIANT lock? Message-ID: <Pine.BSF.4.21.0306052320300.80038-100000@InterJet.elischer.org> In-Reply-To: <200306052213.35422.vjardin@wanadoo.fr>
index | next in thread | previous in thread | raw e-mail
On Thu, 5 Jun 2003, Vincent Jardin wrote: > Maybe one giant2thread node could be introduced into the graphs. It could put > the messages and the mbufs into a queue from a giant context, then they could > be processed from a thread. there is alreadya lock per node, with read/write/try semantics If you cannot get the lock you queue your data for processing by whoever has the lock.. usually there si no collision, especially since most processing only needs a reader lock, of which there may be more than one. > > Is it a possible architecture or do I forget something ? > > Regards, > Vincent > > Le Jeudi 5 Juin 2003 13:38, Julian Elischer a écrit : > > On Thu, 5 Jun 2003, Michael Shiu wrote: > > > Dear all, > > > > > > Just like to know if the netgraph code running 5.x SMP kernel requires > > > the GIANT lock? > > > > Netgraph has lovking built into it but I have not > > had teh time yet to "thrown the switch" and run it without > > giant. (actually it would only have giant if the edge node that > > introduces the packet has giant, or if it's running > > as a net thread.) > > > > What is your graph like? > > > > > I have the netgraph doing bridging right now but the performance is > > > limited by the CPU (right now, it is something around 100k pkt/s in > > > 4-STABLE). Does adding another CPU together with upgrading to 5.x be of > > > any help? I guess the bottleneck right now is only one thread is > > > executing in interrupt context with GIANT being held. Am I right? > > > > > > _Michael > > > > > > _______________________________________________ > > > 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" > > > > _______________________________________________ > > 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" > > _______________________________________________ > 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" >help
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.BSF.4.21.0306052320300.80038-100000>