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authorIngo Molnar <mingo@elte.hu>2007-07-09 18:52:00 +0200
committerIngo Molnar <mingo@elte.hu>2007-07-09 18:52:00 +0200
commit77e54a1f88a1cb0746c7694fa40052bd02df1123 (patch)
treefb329ec0f5b8dfadd3148d03598b48a0c543802b
parent7dd593608df3f9d4e4531cfe29f28c3a3766a0ee (diff)
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: Ingo Molnar <mingo@elte.hu>
-rw-r--r--kernel/sysctl.c80
1 files changed, 80 insertions, 0 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 30ee462ee79..51f5dac42a0 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -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",