Messages in this thread | | | Date | Mon, 6 Dec 2004 23:41:07 +0100 | From | Karsten Desler <> | Subject | Re: _High_ CPU usage while routing (mostly) small UDP packets |
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* David S. Miller wrote: > It's spending nearly half of it's time in iptables. > Try to consolidate your rules if possible. This is the > part of netfilter that really doesn't scale well at all. >
Removing the iptables rules helps reducing the load a little, but the majority of time is still spent somewhere else.
50kpps rx and 43kpps tx. procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 0 0 0 1802956 101032 104464 0 0 0 18 74 26 0 21 79 0 0 0 0 1802956 101032 104464 0 0 0 61 8810 28 0 25 75 0 0 0 0 1802956 101032 104464 0 0 0 233 8867 17 0 24 76 0 0 0 0 1802892 101032 104464 0 0 0 0 8865 16 0 21 79 0 0 0 0 1802892 101032 104464 0 0 0 0 8772 8 0 18 82 0 <- iptables -F 0 0 0 1802892 101032 104464 0 0 0 36 8863 18 0 19 81 0 0 0 0 1802892 101032 104464 0 0 0 80 8700 18 0 18 82 0 0 0 0 1802956 101032 104464 0 0 0 0 8779 7 0 17 83 0 0 0 0 1802948 101032 104464 0 0 0 223 8716 278 4 19 76 0
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