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2001 FREENIX Track Technical Program - Abstract
Scalable Linux Scheduling
Stephen Molloy and Peter Honeyman, CITI, University of Michigan
Abstract
For most
of its existence, Linux has been used primarily as a personal desktop operating
system. Yet, in recent times, its use
as a cost-efficient alternative to commercial operating systems for network
servers, distributed workstations and other large-scale systems has been
increasing. Despite its remarkable rise
in popularity, Linux exhibits many undesirable performance traits.
Concerned
about the scalability of multithreaded network servers powered by Linux, we
investigate improvements to the Linux scheduler. We focus on pre-calculating base priorities and sorting the run
queue for efficient task selection. We
propose an improved scheduler design and compare our implementation in terms of
scalability and performance to the existing Linux scheduler. Our analysis shows that improvements can be
made to the existing scheduler without introducing overhead, thus improving the
scalability and robustness of the Linux operating system.
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Technical Program