From: Roman Gushchin <[email protected]> This patch introduces sysctl interface for smart configuration (default values are given in brackets): sched_smart_enable (1) - enable/disable smart globally sched_smart_prio (10) - rt priority of tasks in a cgroup with smart set sched_smart_gathering (1) - enable/disable smart gathering sched_smart_throttle (1) - enable/disable throttling of CFS tasks
Signed-off-by: Roman Gushchin <[email protected]> --- kernel/sched/rt.c | 76 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ kernel/sysctl.c | 39 ++++++++++++++++++++++++++++ 2 files changed, 115 insertions(+) diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c index ff7751a..21ffe09 100644 --- a/kernel/sched/rt.c +++ b/kernel/sched/rt.c @@ -2247,6 +2247,82 @@ void print_rt_stats(struct seq_file *m, int cpu) #endif /* CONFIG_SCHED_DEBUG */ #ifdef CONFIG_SMART +int proc_smart_enable(struct ctl_table *table, int write, + void __user *buffer, size_t *lenp, loff_t *ppos) +{ + int enable = static_key_enabled(&__smart_enabled); + int ret; + + build_smart_topology(); + + mutex_lock(&smart_mutex); + + if (write && !static_key_false(&__smart_initialized)) { + ret = -EBUSY; + goto exit; + } + + table->data = &enable; + ret = proc_dointvec(table, write, buffer, lenp, ppos); + if (ret) + goto exit; + + if (write) { + if (enable && !static_key_enabled(&__smart_enabled)) { + static_key_slow_inc(&__smart_enabled); + smart_update_globally(); + } + + if (!enable && static_key_enabled(&__smart_enabled)) { + static_key_slow_dec(&__smart_enabled); + smart_update_globally(); + } + } + +exit: + mutex_unlock(&smart_mutex); + + return ret; +} + +int proc_smart_static_key(struct ctl_table *table, int write, + void __user *buffer, size_t *lenp, loff_t *ppos) +{ + struct static_key *key; + int enable; + int ret; + static DEFINE_MUTEX(mutex); + + mutex_lock(&mutex); + + key = table->data; + enable = static_key_enabled(key); + + if (write && !static_key_false(&__smart_initialized)) { + ret = -EBUSY; + goto exit; + } + + table->data = &enable; + ret = proc_dointvec(table, write, buffer, lenp, ppos); + if (ret) + goto exit; + + if (write) { + if (enable && !static_key_enabled(key)) + static_key_slow_inc(key); + + if (!enable && static_key_enabled(key)) + static_key_slow_dec(key); + } + +exit: + table->data = key; + mutex_unlock(&mutex); + + return ret; +} + int check_smart_data(void) { int cpu, core; diff --git a/kernel/sysctl.c b/kernel/sysctl.c index a1e71e9..27eb548 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -128,6 +128,7 @@ static int __maybe_unused one = 1; static int __maybe_unused two = 2; static int __maybe_unused three = 3; static unsigned long one_ul = 1; +static int ninety_eight = 98; static int one_hundred = 100; #ifdef CONFIG_PRINTK static int ten_thousand = 10000; @@ -178,6 +179,13 @@ extern int no_unaligned_warning; #ifdef CONFIG_SMART struct static_key smart_cfs_gather = STATIC_KEY_INIT_TRUE; struct static_key smart_cfs_throttle = STATIC_KEY_INIT_TRUE; + +extern int sched_smart_prio; + +int proc_smart_static_key(struct ctl_table *table, int write, + void __user *buffer, size_t *lenp, loff_t *ppos); +int proc_smart_enable(struct ctl_table *table, int write, + void __user *buffer, size_t *lenp, loff_t *ppos); #endif #ifdef CONFIG_PROC_SYSCTL @@ -446,6 +454,37 @@ static struct ctl_table kern_table[] = { .extra1 = &one, }, #endif +#ifdef CONFIG_SMART + { + .procname = "sched_smart_enable", + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_smart_enable, + }, + { + .procname = "sched_smart_prio", + .data = &sched_smart_prio, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_dointvec_minmax, + .extra1 = &one, + .extra2 = &ninety_eight, + }, + { + .procname = "sched_smart_gathering", + .data = &smart_cfs_gather, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_smart_static_key, + }, + { + .procname = "sched_smart_throttle", + .data = &smart_cfs_throttle, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_smart_static_key, + }, +#endif #ifdef CONFIG_PROVE_LOCKING { .procname = "prove_locking", -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
