From ce0dbbbb30aee6a835511d5be446462388ba9eee Mon Sep 17 00:00:00 2001 From: Clark Williams Date: Thu, 7 Feb 2013 09:47:04 -0600 Subject: sched/rt: Add a tuning knob to allow changing SCHED_RR timeslice Add a /proc/sys/kernel scheduler knob named sched_rr_timeslice_ms that allows global changing of the SCHED_RR timeslice value. User visable value is in milliseconds but is stored as jiffies. Setting to 0 (zero) resets to the default (currently 100ms). Signed-off-by: Clark Williams Cc: Peter Zijlstra Cc: Steven Rostedt Link: http://lkml.kernel.org/r/20130207094704.13751796@riff.lan Signed-off-by: Ingo Molnar --- include/linux/sched/sysctl.h | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) (limited to 'include/linux/sched/sysctl.h') diff --git a/include/linux/sched/sysctl.h b/include/linux/sched/sysctl.h index bac914e458ca..d2bb0ae979d0 100644 --- a/include/linux/sched/sysctl.h +++ b/include/linux/sched/sysctl.h @@ -73,6 +73,13 @@ static inline unsigned int get_sysctl_timer_migration(void) return 1; } #endif + +/* + * control realtime throttling: + * + * /proc/sys/kernel/sched_rt_period_us + * /proc/sys/kernel/sched_rt_runtime_us + */ extern unsigned int sysctl_sched_rt_period; extern int sysctl_sched_rt_runtime; @@ -90,7 +97,13 @@ extern unsigned int sysctl_sched_autogroup_enabled; */ #define RR_TIMESLICE (100 * HZ / 1000) -int sched_rt_handler(struct ctl_table *table, int write, +extern int sched_rr_timeslice; + +extern int sched_rr_handler(struct ctl_table *table, int write, + void __user *buffer, size_t *lenp, + loff_t *ppos); + +extern int sched_rt_handler(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos); -- cgit v1.2.3