🚀 go-pugleaf

In article <36662@lll-winken.LLNL.GOV> brooks@maddog.llnl.gov (Eugene Brooks) writes:
>In article <20764@usc.edu> vorbrueg@bufo.usc.edu (Jan Vorbrueggen) writes:
>>Message forwarding isn't so difficult either. I've read of a system
>>requiring less than 10 us overhead per through-route (this probably
>>is for the destination link being available). No interrupt handling
>>involved here - that part is all handled in hardware.
>This level of overhead for each hop is completely intolerable.

And what is the overhead for each interconnect level in a "shared
memory" machine such as the ultracomputer?  Keep in mind that in such a
machine, every non-local memory access must go through each level and 
back while the processor waits.