From: Eric Dumazet <eric.dumazet@gmail.com>
To: Ajith Adapa <adapa.ajith@gmail.com>
Cc: netdev <netdev@vger.kernel.org>
Subject: Re: Regarding Routing cache
Date: Thu, 17 Nov 2011 08:26:58 +0100 [thread overview]
Message-ID: <1321514818.3274.37.camel@edumazet-laptop> (raw)
In-Reply-To: <CADAe=+Jc0YinguPhTuv3sNA2bgEuuTpY9ocE7-_z-uKnsyC7Lw@mail.gmail.com>
Please, no private mails on this discussion. I added back netdev on CC.
Le jeudi 17 novembre 2011 à 12:09 +0530, Ajith Adapa a écrit :
> Hi,
>
> Sorry about my naive post regarding the issue.
>
> > IPv6 has no routing cache, and wont have one, since we are trying to
> > remove IPv4 routing cache :)
>
> But it would have performance issues right as we always check fib
> table for destination route ?
>
> Is there any references or posts or material which takes about the
> reason for removing the ipv6 and ipv4 routing caches ?
>
routing cache doesnt scale and was difficult to tune in some situations.
It uses a lot of memory, and doesnt fit in CPU caches.
It was a good solution in the past, but better is to get scalable algo
in the first place.
http://vger.kernel.org/netconf2011.html
http://vger.kernel.org/netconf2011_slides/davem_netconf2011.pdf
prev parent reply other threads:[~2011-11-17 7:27 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-17 5:00 Regarding Routing cache Ajith Adapa
2011-11-17 6:04 ` Ajith Adapa
2011-11-17 6:26 ` Eric Dumazet
[not found] ` <CADAe=+Jc0YinguPhTuv3sNA2bgEuuTpY9ocE7-_z-uKnsyC7Lw@mail.gmail.com>
2011-11-17 7:26 ` Eric Dumazet [this message]
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