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authorClark Williams <williams@redhat.com>2013-02-07 09:47:04 -0600
committerIngo Molnar <mingo@kernel.org>2013-02-07 20:51:07 +0100
commitce0dbbbb30aee6a835511d5be446462388ba9eee (patch)
treec3d4d6f64a0fe7eec9283f4413d111a8d37d7053 /include/linux/sched
parentcf4aebc292fac7f34f8345664320e9d4a42ca76c (diff)
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 <williams@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/20130207094704.13751796@riff.lan Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/sched')
-rw-r--r--include/linux/sched/sysctl.h15
1 files changed, 14 insertions, 1 deletions
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);