Lightweight kernel operating system: Difference between revisions

Revision as of 18:25, 2 December 2020

Revision as of 09:53, 3 October 2022

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By restricting services to only those that are absolutely necessary and by streamlining those that are provided, the overhead (sometimes called noise) of the lightweight operating system is minimized. This allows a significant ''and'' predictable amount of the processor cycles to be given to the parallel application. Since the application can make consistent progress on each processor, they will reach their synchronization points faster, ideally at the same time. Lost wait time is reduced.

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== Future ==

The last supercomputers running lightweight kernels are the remaining IBM [[Blue Gene|Bluegene]] systems running [[CNK operating system|CNK]]. A new direction for lightweight kernels is to combine them with a

full-featured OS, such as Linux, on a many-core node. These [[multikernel]] operating systems run a lightweight kernel on some of the CPU cores of a node, while other cores provide services that are

omitted in lightweight kernels. By combining the two, users get the Linux features they need but also the deterministic behavior and scalability of lightweight kernels.

== References ==