Re: Route caching ?
- From: "Ivo Vachkov" <ivo.vachkov@xxxxxxxxx>
- Date: Wed, 22 Aug 2007 17:37:50 +0300
Actually there is:
struct route_in6 ip6_forward_rt;
that "caches" the last route used (thanks blue !!!) but i think this
technique is pointless in a multiflow traffic.
Is it reasonable to believe that route caches can improve networking
performance or we should leave it up to the routing table itself ?
On 8/22/07, Bruce M. Simpson <bms@xxxxxxxxxxx> wrote:
Not really, at least, not in the way one would think. rtalloc() is a
legacy function.
ip_output() will still call rtalloc() if you pass it a filled out
'struct route', a structure which is not a route, but an internal
request to look up a route.
This is a wrapper for rtalloc_ign(), which in turn is a wrapper for
rtalloc1(), the function which does the actual lookup.
rtalloc_ign() is pretty straightforward. Note however that this approach
only checks the RTF_UP flag and ifp, nothing more. This makes it
suitable for implementing floating statics, but nothing more dynamic
than that.
regards,
BMS
--
"UNIX is basically a simple operating system, but you have to be a
genius to understand the simplicity." Dennis Ritchie
_______________________________________________
freebsd-net@xxxxxxxxxxx mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-net
To unsubscribe, send any mail to "freebsd-net-unsubscribe@xxxxxxxxxxx"
- Follow-Ups:
- Re: Route caching ?
- From: Claudio Jeker
- Re: Route caching ?
- From: Bruce M. Simpson
- Re: Route caching ?
- References:
- Route caching ?
- From: Ivo Vachkov
- Re: Route caching ?
- From: Bruce M. Simpson
- Route caching ?
- Prev by Date: Re: Allocating AF constants for vendors.
- Next by Date: Re: Route caching ?
- Previous by thread: Re: Route caching ?
- Next by thread: Re: Route caching ?
- Index(es):
Relevant Pages
|
