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sched.7: Add more precise details on CFS's treatment of the nice value 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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Michael Kerrisk 2016-11-27 16:32:56 +01:00
parent 45fcd0e27f
commit 115366c6f3
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@ -396,6 +396,9 @@ across Linux kernel versions.
With the advent of the CFS scheduler in kernel 2.6.23,
Linux adopted an algorithm that causes
relative differences in nice values to have a much stronger effect.
In the current implementation, each unit of difference in the
nice values of two processes results in a factor of 1.25
in the degree to which the scheduler favors the higher priority process.
This causes very low nice values (+19) to truly provide little CPU
to a process whenever there is any other
higher priority load on the system,