Re: [patch] O(1) scheduler, -G1, 2.5.2-pre10, 2.4.17 (fwd)
Mike Kravetz (kravetz@us.ibm.com)
Thu, 10 Jan 2002 13:57:58 -0800
If I run 3 cpu-hog tasks on a 2 CPU system, then 1 task will get an
entire CPU while the other 2 tasks share the other CPU (easily verified
by a simple test program). On previous versions of the scheduler
'balancing' this load was achieved by the global nature of time slices.
No task was given a new time slice until the time slices of all runnable
tasks had expired. In the current scheduler, the decision to replenish
time slices is made at a local (pre-CPU) level. I assume the load
balancing code should take care of the above workload? OR is this the
behavior we desire? We certainly have optimal cache use.
--
Mike
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