Messages in this thread Patch in this message | | | Date | Thu, 16 Feb 2012 14:52:21 +0900 | From | Hiroshi Shimamoto <> | Subject | [PATCH] sched: Make initial SCHED_RR timeslace DEF_TIMESLICE |
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From: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Current the initial SCHED_RR timeslice of init_task is HZ, which means 1s, and is not same as the default SCHED_RR timeslice DEF_TIMESLICE.
Change that initial timeslice to the DEF_TIMESLICE.
Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> --- include/linux/init_task.h | 2 +- include/linux/sched.h | 6 ++++++ kernel/sched/sched.h | 4 ---- 3 files changed, 7 insertions(+), 5 deletions(-)
diff --git a/include/linux/init_task.h b/include/linux/init_task.h index 9c66b1a..d04d67d 100644 --- a/include/linux/init_task.h +++ b/include/linux/init_task.h @@ -149,7 +149,7 @@ extern struct cred init_cred; }, \ .rt = { \ .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \ - .time_slice = HZ, \ + .time_slice = DEF_TIMESLICE, \ .nr_cpus_allowed = NR_CPUS, \ }, \ .tasks = LIST_HEAD_INIT(tsk.tasks), \ diff --git a/include/linux/sched.h b/include/linux/sched.h index 3dbc6b5..e84315a 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1234,6 +1234,12 @@ struct sched_rt_entity { #endif }; +/* + * default timeslice is 100 msecs (used only for SCHED_RR tasks). + * Timeslices get refilled after they expire. + */ +#define DEF_TIMESLICE (100 * HZ / 1000) + struct rcu_node; enum perf_event_task_context { diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 8a2c768..c0660a1 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -36,11 +36,7 @@ extern __read_mostly int scheduler_running; /* * These are the 'tuning knobs' of the scheduler: - * - * default timeslice is 100 msecs (used only for SCHED_RR tasks). - * Timeslices get refilled after they expire. */ -#define DEF_TIMESLICE (100 * HZ / 1000) /* * single value that denotes runtime == period, ie unlimited time. -- 1.7.7.6
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