Theory versus practice

By: David Kanter (dkanter.delete@this.realworldtech.com), May 16, 2006 12:55 pm
Room: Moderated Discussions
AnalGuy (AnalGuy@yahoo.com) on 5/16/06 wrote:
---------------------------
>Why are you talking about distributed algorithms, we are not discussing Distributed
>Systems, we are just discussing Microkernel and Monolothic >kernels.

Well, I think the discussion has a lot to do with the theory behind mono versus micro. I'm not an OS developer, but my understanding is that ukernels need to have a lot of message passing between different blocks of software, whereas mono kernels simply share regions of memory. In many respects, this seems to be similar to shared memory versus clustered computing. So distributed algorithms would be useful for ukernels.

Again, I'm not an OS developer, so someone correct me if I'm spouting nonsense.

>Monolothic kernel still beat the Microkernel is performace, i've done test suites
>for BSD before comparing to Mach/Hurd and the results was obvious.
>However, Microkernel desgin gives more protection, since everything is running
>in userspace, but this can be overcomed in monolothic >kernels if it was carely coded.

I think the point had less to do with current implementations, and more to do with what exactly what is possible.

DK
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