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sched: Add statistic for newidle load balance cost

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Tracking rq->max_idle_balance_cost and sd->max_newidle_lb_cost.
It's useful to know these values in debug mode.

Signed-off-by: Alex Shi <alex.shi@linaro.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/52E0F3BF.5020904@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Alex Shi 2014-01-23 18:39:54 +08:00 committed by Ingo Molnar
parent 27f17580fd
commit 37e6bae839
2 changed files with 7 additions and 3 deletions
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9
kernel/sched/core.c
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@ -4811,7 +4811,7 @@ set_table_entry(struct ctl_table *entry,
static struct ctl_table * static struct ctl_table *
sd_alloc_ctl_domain_table(struct sched_domain *sd) sd_alloc_ctl_domain_table(struct sched_domain *sd)
{ {
struct ctl_table *table = sd_alloc_ctl_entry(13); struct ctl_table *table = sd_alloc_ctl_entry(14);
if (table == NULL) if (table == NULL)
return NULL; return NULL;
@ -4839,9 +4839,12 @@ sd_alloc_ctl_domain_table(struct sched_domain *sd)
sizeof(int), 0644, proc_dointvec_minmax, false); sizeof(int), 0644, proc_dointvec_minmax, false);
set_table_entry(&table[10], "flags", &sd->flags, set_table_entry(&table[10], "flags", &sd->flags,
sizeof(int), 0644, proc_dointvec_minmax, false); sizeof(int), 0644, proc_dointvec_minmax, false);
set_table_entry(&table[11], "name", sd->name, set_table_entry(&table[11], "max_newidle_lb_cost",
&sd->max_newidle_lb_cost,
sizeof(long), 0644, proc_doulongvec_minmax, false);
set_table_entry(&table[12], "name", sd->name,
CORENAME_MAX_SIZE, 0444, proc_dostring, false); CORENAME_MAX_SIZE, 0444, proc_dostring, false);
/* &table[12] is terminator */ /* &table[13] is terminator */
return table; return table;
} }

1
kernel/sched/debug.c
View File

@ -321,6 +321,7 @@ do { \
P(sched_goidle); P(sched_goidle);
#ifdef CONFIG_SMP #ifdef CONFIG_SMP
P64(avg_idle); P64(avg_idle);
P64(max_idle_balance_cost);
#endif #endif
P(ttwu_count); P(ttwu_count);