[erlang-questions] Millions of processes?

Bengt Kleberg <>
Thu Sep 25 08:39:01 CEST 2008


There where other micro kernels around at the time. At least 2 had
benchmarks showing them to be faster than ''macro kernels''.


bengt

On Thu, 2008-09-25 at 15:20 +1000, jm wrote:
> This was generally true only of the early micro kernels. Apparently, the 
> Mach kernel is slow when compared to the newer L4 kernel. see 
> http://en.wikipedia.org/wiki/L4_microkernel_family#History
> 
> Jeff.
> 
> Bengt Kleberg wrote:
> > Greetings,
> >
> > It is not only _ideas_ in computer science that are held in contempt (as
> > quoted below). Ages ago (before 2000) I read an article about Linux in
> > embedded environments. The article quoted Linus Torvalds on why not to
> > use micro kernels. The reasons where that they are:
> > 1 Experimental
> > 2 Complex
> > 3 Slow
> >
> > After looking around for a while I found plenty of articles about
> > commercial micro kernels, and benchmarks showing micro kernels running
> > workloads faster than monolithic kernels. So 1 and 3 seemed to be
> > incorrect.
> > I submitted these findings to the magazine, which prompted an answer
> > from Mr Torvalds. He assert that all three where true, but did not
> > discuss what I had found. So (IMHO) it is also facts that are not held
> > in very high regard.
> >
> >   
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