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sched: SCHED_IDLE weight change

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Increase the SCHED_IDLE weight from 2 to 3, this gives much more stable
vruntime numbers.

time advanced in 100ms:

 weight=2

 64765.988352
 67012.881408
 88501.412352

 weight=3

 35496.181411
 34130.971298
 35497.411573

Signed-off-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra 2009-01-15 14:53:37 +01:00 committed by Ingo Molnar
parent 98a4826b99
commit cce7ade803
1 changed files with 2 additions and 2 deletions
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4
kernel/sched.c
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@ -1323,8 +1323,8 @@ static inline void update_load_sub(struct load_weight *lw, unsigned long dec)
* slice expiry etc. * slice expiry etc.
*/ */
#define WEIGHT_IDLEPRIO 2 #define WEIGHT_IDLEPRIO 3
#define WMULT_IDLEPRIO (1 << 31) #define WMULT_IDLEPRIO 1431655765
/* /*
* Nice levels are multiplicative, with a gentle 10% change for every * Nice levels are multiplicative, with a gentle 10% change for every