Messages in this thread Patch in this message | | | Date | Sat, 06 Nov 2004 21:32:00 +1100 | From | Con Kolivas <> | Subject | [PATCH] [sched-int-changes 2/5] adjust_timeslice_granularity |
| |
adjust_timeslice_granularity
Please include in at least one -mm release.
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>
Index: linux-2.6.10-rc1-mm3/kernel/sched.c =================================================================== --- linux-2.6.10-rc1-mm3.orig/kernel/sched.c 2004-11-05 20:54:25.302964953 +1100 +++ linux-2.6.10-rc1-mm3/kernel/sched.c 2004-11-05 20:56:46.608179150 +1100 @@ -134,12 +134,14 @@ (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 [unhandled content-type:application/pgp-signature] | |