Commit 77e54a1f authored by Ingo Molnar's avatar Ingo Molnar
Browse files

sched: add CFS debug sysctls 



add CFS debug sysctls: only tweakable if SCHED_DEBUG is enabled.
This allows for faster debugging of scheduler problems.

Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 7dd59360

kernel/sysctl.c

+80 −0
Original line number Diff line number Diff line
@@ -206,7 +206,87 @@ static ctl_table root_table[] = { 
	{ .ctl_name = 0 }

};



#ifdef CONFIG_SCHED_DEBUG

static unsigned long min_sched_granularity_ns = 100000;		/* 100 usecs */

static unsigned long max_sched_granularity_ns = 1000000000;	/* 1 second */

static unsigned long min_wakeup_granularity_ns;			/* 0 usecs */

static unsigned long max_wakeup_granularity_ns = 1000000000;	/* 1 second */

#endif



static ctl_table kern_table[] = {

#ifdef CONFIG_SCHED_DEBUG

	{

		.ctl_name	= CTL_UNNUMBERED,

		.procname	= "sched_granularity_ns",

		.data		= &sysctl_sched_granularity,

		.maxlen		= sizeof(unsigned int),

		.mode		= 0644,

		.proc_handler	= &proc_dointvec_minmax,

		.strategy	= &sysctl_intvec,

		.extra1		= &min_sched_granularity_ns,

		.extra2		= &max_sched_granularity_ns,

	},

	{

		.ctl_name	= CTL_UNNUMBERED,

		.procname	= "sched_wakeup_granularity_ns",

		.data		= &sysctl_sched_wakeup_granularity,

		.maxlen		= sizeof(unsigned int),

		.mode		= 0644,

		.proc_handler	= &proc_dointvec_minmax,

		.strategy	= &sysctl_intvec,

		.extra1		= &min_wakeup_granularity_ns,

		.extra2		= &max_wakeup_granularity_ns,

	},

	{

		.ctl_name	= CTL_UNNUMBERED,

		.procname	= "sched_batch_wakeup_granularity_ns",

		.data		= &sysctl_sched_batch_wakeup_granularity,

		.maxlen		= sizeof(unsigned int),

		.mode		= 0644,

		.proc_handler	= &proc_dointvec_minmax,

		.strategy	= &sysctl_intvec,

		.extra1		= &min_wakeup_granularity_ns,

		.extra2		= &max_wakeup_granularity_ns,

	},

	{

		.ctl_name	= CTL_UNNUMBERED,

		.procname	= "sched_stat_granularity_ns",

		.data		= &sysctl_sched_stat_granularity,

		.maxlen		= sizeof(unsigned int),

		.mode		= 0644,

		.proc_handler	= &proc_dointvec_minmax,

		.strategy	= &sysctl_intvec,

		.extra1		= &min_wakeup_granularity_ns,

		.extra2		= &max_wakeup_granularity_ns,

	},

	{

		.ctl_name	= CTL_UNNUMBERED,

		.procname	= "sched_runtime_limit_ns",

		.data		= &sysctl_sched_runtime_limit,

		.maxlen		= sizeof(unsigned int),

		.mode		= 0644,

		.proc_handler	= &proc_dointvec_minmax,

		.strategy	= &sysctl_intvec,

		.extra1		= &min_sched_granularity_ns,

		.extra2		= &max_sched_granularity_ns,

	},

	{

		.ctl_name	= CTL_UNNUMBERED,

		.procname	= "sched_child_runs_first",

		.data		= &sysctl_sched_child_runs_first,

		.maxlen		= sizeof(unsigned int),

		.mode		= 0644,

		.proc_handler	= &proc_dointvec,

	},

	{

		.ctl_name	= CTL_UNNUMBERED,

		.procname	= "sched_features",

		.data		= &sysctl_sched_features,

		.maxlen		= sizeof(unsigned int),

		.mode		= 0644,

		.proc_handler	= &proc_dointvec,

	},

#endif

	{

		.ctl_name	= KERN_PANIC,

		.procname	= "panic",