David Miller wrote:
From: Patrick McHardy <[EMAIL PROTECTED]>
Date: Sun, 24 Jun 2007 14:53:36 +0200
- sendmsg eth0, no NAT: sys 0m2.508s
- sendmsg eth0, NAT: sys 0m2.539s
- sendmsg eth0, NAT + patch: sys 0m2.445s (no change)
This is probably because we're touching all the data anyways
and if the resident set size is small enough (as a gigabit
or 100MB ethernet TCP stream window would be) then it all fits
mostly in the L2 caches of the cpu.
Yeah, thats what I suspected too. On loopback it seems to exceed
the cache size, which is a bit strange since its 1MB. Or maybe
there is some loopback optimization interfering.
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