sched: de-SCHED_OTHER-ize the RT path

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The current wake-up code path tries to determine if it can optimize the
wake-up to "this_cpu" by computing load calculations.  The problem is that
these calculations are only relevant to SCHED_OTHER tasks where load is king.
For RT tasks, priority is king.  So the load calculation is completely wasted
bandwidth.

Therefore, we create a new sched_class interface to help with
pre-wakeup routing decisions and move the load calculation as a function
of CFS task's class.

Signed-off-by: Gregory Haskins <ghaskins@novell.com>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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Gregory Haskins 2008-01-25 21:08:09 +01:00 • committed by Ingo Molnar

parent 697f0a487f

commit e7693a362e

5 changed files with 195 additions and 140 deletions

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1

include/linux/sched.h

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167

kernel/sched.c

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148

kernel/sched_fair.c

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9

kernel/sched_idletask.c

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10

kernel/sched_rt.c

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