[j-nsp] 32-Bit JunOS on the 64-Bit Routing Engines

Jonas Frey (Probe Networks) jf at probe-networks.de
Thu Aug 25 20:56:47 EDT 2011

Thats not completely accurate, for example the Intel Atom D525 does run
64bit code.

> There are plenty of machines that do. virtually every intel system since
> the pentium pro  (except the atom) has the hardware if not the bios
> support for doing so, that's not germain to the question of whether it's
> feasible/useful in an embedded system. In particular, in a system (like
> for example a firewall) where kernel datastructures may represent the
> overwhelming source of memory utilization, the  PAE performance hit may
> trivially overwhelm the value of any memory that can otherwise be freed
> up for userspace.
> 64bitness has been the prefered approach for intel based servers since
> about 2003, but the embedded lifecycle runs on it's own timeline.
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