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>
> In the Linux scheduler they use a circular queue implementation with round
> robin. What is the advantage of this over just using a normal queue with a
> back and front. Also does anyone know what a test plan for such a design
> would even begin to look like. This is a project for a proposal going around
> in my neighborhood and I am wondering why in the world someone would want to
> modify the Linux scheduler to this extent.
This is not an authoritive answer but:
It's simple, and fast. Locks only needed when adding/removing
entries.
It is also nearly optimum when the queue only has 5 (or so) number of
entries. It will not be optimum if there are 32/64 CPUs with 120 or more
runnable entries. There are other schedulers available that may do a
better job for that situation.
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Jesse I Pollard, II
Email: pollard@navo.hpc.mil
Any opinions expressed are solely my own.
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This archive was generated by hypermail 2b29 : Tue Nov 07 2000 - 21:00:09 EST