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Ask HN: What kinds of kernel designs are best for multicore processors?

3 points by astroguy ↗ HN
Among Barrelfish (http://www.barrelfish.org/), Corey (http://pdos.csail.mit.edu/corey/) and fos (http://dspace.mit.edu/handle/172...), which kernel design is more suitable for multicore processors?

4 comments

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cookiecaper
Maybe this question would fit in better at StackOverflow.
nzmsv
I think the first question to ask is, what is the definition of a multicore processor? Is it something like the current crop of cache-coherent designs? There are concerns about scaling this design to lots of cores. Or is it something like a network of machines on a chip? In that case, the OS might look more like Mach.
astroguy
I am behind crop of cache-coherent designs. Why scaling is an issue?
rphlx
The cache coherency protocols do not scale as nicely as explicit message passing protocols, in terms of area/power.