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    SubjectRe: _High_ CPU usage while routing (mostly) small UDP packets
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    On Tue, 2004-12-07 at 16:10, Karsten Desler wrote:
    > Karsten Desler <kdesler@soohrt.org> wrote:
    > > Current packetload on eth0 (and reversed on eth1):
    > > 115kpps tx
    > > 135kpps rx
    >
    > I totally forgot to mention: There are approximately 100k concurrent
    > flows.

    ;-> Aha. That would make a huge difference. I know of noone
    who has actually done this level of testing. I have tried upto about 50K
    flows myself in early 2.6.x and was eventually compute bound.
    Really try compiling out totaly iptables/netfilter - it will make a
    difference.
    You may also want to try something like LC trie algorithm that Robert
    and co are playing with to see if it makes a difference with this many
    flows.

    cheers,
    jamal

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