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Commit dba91385 authored by Linux Build Service Account's avatar Linux Build Service Account Committed by Gerrit - the friendly Code Review server
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Merge "sched: Avoid packing tasks with low sleep time"

parents 7d4b9fce f3e2e286

include/linux/sched/sysctl.h

+1 −0
Original line number Diff line number Diff line
@@ -73,6 +73,7 @@ extern unsigned int sysctl_sched_enable_thread_grouping; 
extern unsigned int sysctl_sched_freq_aggregate_threshold_pct;

extern unsigned int sysctl_sched_prefer_sync_wakee_to_waker;

extern unsigned int sysctl_sched_short_burst;

extern unsigned int sysctl_sched_short_sleep;



#else /* CONFIG_SCHED_HMP */

kernel/sched/hmp.c

+4 −1
Original line number Diff line number Diff line
@@ -959,9 +959,12 @@ unsigned int __read_mostly sysctl_sched_restrict_cluster_spill; 
/*

 * Scheduler tries to avoid waking up idle CPUs for tasks running

 * in short bursts. If the task average burst is less than

 * sysctl_sched_short_burst nanoseconds, it is eligible for packing.

 * sysctl_sched_short_burst nanoseconds and it sleeps on an average

 * for more than sysctl_sched_short_sleep nanoseconds, then the

 * task is eligible for packing.

 */

unsigned int __read_mostly sysctl_sched_short_burst;

unsigned int __read_mostly sysctl_sched_short_sleep = 1 * NSEC_PER_MSEC;



static void

_update_up_down_migrate(unsigned int *up_migrate, unsigned int *down_migrate)

kernel/sched/sched.h

+2 −1
Original line number Diff line number Diff line
@@ -1420,7 +1420,8 @@ static inline u64 cpu_cravg_sync(int cpu, int sync) 


static inline bool is_short_burst_task(struct task_struct *p)

{

	return p->ravg.avg_burst < sysctl_sched_short_burst;

	return p->ravg.avg_burst < sysctl_sched_short_burst &&

	       p->ravg.avg_sleep_time > sysctl_sched_short_sleep;

}



extern void check_for_migration(struct rq *rq, struct task_struct *p);

kernel/sysctl.c

+7 −0
Original line number Diff line number Diff line
@@ -514,6 +514,13 @@ static struct ctl_table kern_table[] = { 
		.mode		= 0644,

		.proc_handler	= proc_dointvec,

	},

	{

		.procname       = "sched_short_sleep_ns",

		.data           = &sysctl_sched_short_sleep,

		.maxlen         = sizeof(unsigned int),

		.mode           = 0644,

		.proc_handler   = proc_dointvec,

	},

#endif	/* CONFIG_SCHED_HMP */

#ifdef CONFIG_SCHED_DEBUG

	{