On 2007-03-17 at 10:02:37 [+0100], Zenja Solaja <solaja@xxxxxxxxx> wrote: > Sorry for responding to my own post, but when I remove all debug output from > the code, I get a much more reasonable ping response time of 0.18ms (matches > Zeta stack, which runs in kernel space). Running TOP shows a CPU user space > code at 4.6 %, with a Zeta reference of 3.0, so I guess that that is penalty > of running a stack from user space. 1.6% CPU for a ping sounds a bit much. On my machine under BeOS/netserver the effect of a ping becomes measurable only when the Terminal starts scrolling (3.6-3.7% -> 3.9-4.0%). Anyway, good luck! CU, Ingo