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[[!tag open_issue_hurd]]

We would expect that fine-grained, compartmentalized systems, that is,
microkernel-based multi-server systems in particular, would be ideal condidates
for applying multiprocessing.  That is, however, only true from a first and
inexperienced point of view: there are many difficulties.

IRC, #hurd, August / September 2010

    <marcusb> silver_hook: because multi-server systems depend on inter-process
      communication, and inter-process communication is many times more expensive
      across cpus
    <marcusb> silver_hook: so you either force interrelated work on the same cpu,
      or suffer heavy penalties.  and in a typical fine-grained object system, all
      objects are interconnected!
    <marcusb> silver_hook: resources in today's systems, even in a single node with
      one cpu, but more so in a network, are very non-uniform.  scheduling these
      resources efficiently is a huge problem.  restricting the resource
      distribution policies in the way microkernel systems tend to do is posing
      serious research challenges

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See also: [[multithreading]].