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Haiku OS Gets CPU Scheduler Improvements

Operating Systems

Published on 30 December 2013 01:30 PM EST
Written by Michael Larabel in Operating Systems
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Fans of the open-source Haiku OS derived from BeOS can now be happy if running on modern processors there are some major CPU scheduling improvements and support for more than eight processor cores.

For Haiku fans there is a lengthy post on the Haiku blog about all of the scheduler improvements made in recent months to the operating system with still a decent following.

The main scheduler logic for Haiku has been completed, a spinlock has been removed with more fine-grained locking, IRQs/MSIs are now directed to an arbitrary logical processor, changes to how dynamic priorities are handled, and inter-processor interrupts (IPI) have improved. With this work there's also a new cpufreq module for Intel Sandy Bridge and newer processors while a cpuidle module is available for all processors with support for C-states and invariant TSC.

Another important change made is that Haiku OS can now work on more than eight processor cores and can now work on systems with up to 64 cores, while that limit can be made higher in the future.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
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