Date: Thu, 9 Dec 2004 15:48:31 +0000 (GMT) From: Robert Watson <rwatson@freebsd.org> To: Andre Oppermann <andre@freebsd.org> Cc: Ruslan Ermilov <ru@freebsd.org> Subject: Re: cvs commit: src/sys/netinet in_gif.c Message-ID: <Pine.NEB.3.96L.1041209154751.54613E-100000@fledge.watson.org> In-Reply-To: <41B8709C.329DD195@freebsd.org>
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On Thu, 9 Dec 2004, Andre Oppermann wrote: > Ruslan Ermilov wrote: > > > > On Tue, Dec 07, 2004 at 11:18:15AM +0100, Andre Oppermann wrote: > > > I hope to remove the ability to have pointers into the routing table > > > before 6.0 release. > > > > > This would make my WIP OBE, which is nice. But how are you going to > > compensate for the performance loss of *not* having cached routes? > > Up to a couple of hundred kpps it doesn't matter and the only place > where we have cached routes is in the various IP[46] tunnels. The > caching makes locking of the routing table more complex and expensive. > Once that can be simplified there is a significant amount of lookup cost > going away. It is also my belief that the locking around the cached routes is currently incorrect, and with that locking added, there will also be a further hit. Robert N M Watson FreeBSD Core Team, TrustedBSD Projects robert@fledge.watson.org Principal Research Scientist, McAfee Research
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