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SubjectRe: 2.2.18Pre Lan Performance Rocks!

On Mon, 30 Oct 2000, Jeff V. Merkey wrote:

> [...] All protection has to go away in all LAN paths for this to
> happen, and user space apps set to ring 0. [...]

i found that this is not a requirement for good network scalability. We do
not do a syscall for every packet, so the cost evens out. Sure, it does
not hurt to not eat ~1 microsecond per system-call, but it causes no
overhead or scalability limit otherwise. In the TUX webserver we have
user-space modules doing context-switch-less webserving, and it scales
quite well, and is generic.


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