From: Con Kolivas <kernel@kolivas.org> The minimum timeslice was decreased from 10ms to 5ms. In the process, the timeslice granularity was leading to much more rapid round robinning of interactive tasks at cache trashing levels. Restore minimum granularity to 10ms. Signed-off-by: Con Kolivas <kernel@kolivas.org> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> --- 25-akpm/kernel/sched.c | 6 ++++-- 1 files changed, 4 insertions(+), 2 deletions(-) diff -puN kernel/sched.c~sched-adjust_timeslice_granularity kernel/sched.c --- 25/kernel/sched.c~sched-adjust_timeslice_granularity 2004-12-03 20:56:31.035042144 -0800 +++ 25-akpm/kernel/sched.c 2004-12-03 20:56:31.042041080 -0800 @@ -133,12 +133,14 @@ (NS_TO_JIFFIES((p)->sleep_avg) * MAX_BONUS / \ MAX_SLEEP_AVG) +#define GRANULARITY (10 * HZ / 1000 ? : 1) + #ifdef CONFIG_SMP -#define TIMESLICE_GRANULARITY(p) (MIN_TIMESLICE * \ +#define TIMESLICE_GRANULARITY(p) (GRANULARITY * \ (1 << (((MAX_BONUS - CURRENT_BONUS(p)) ? : 1) - 1)) * \ num_online_cpus()) #else -#define TIMESLICE_GRANULARITY(p) (MIN_TIMESLICE * \ +#define TIMESLICE_GRANULARITY(p) (GRANULARITY * \ (1 << (((MAX_BONUS - CURRENT_BONUS(p)) ? : 1) - 1))) #endif _