Re: [ANNOUNCE] NF-HIPAC: High Performance Packet Classification

[Andi Kleen]

On Wed, Sep 25, 2002 at 05:29:31PM -0700, David S. Miller wrote:
>    The current FIBs have a bit heavier locking at least. Fine grain locking
>    btrees is also not easy/nice.
>    
> Also not necessary, only the top level cache really needs to be
> top performance.

Sure, but if they were unified (that is what I understood what the original
poster wanted to do) then they would be suddenly much more performance
critical and need fine grained locking.

-Andi

P.S.: One big performance problem currently is ip_conntrack. It has a bad
hash function and tends to have a too big working set (beyond cache size)
Some tuning in this regard would help a lot of workloads.