From 77e54a1f88a1cb0746c7694fa40052bd02df1123 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Mon, 9 Jul 2007 18:52:00 +0200 Subject: [PATCH] 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 --- kernel/sysctl.c | 80 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 80 insertions(+) diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 30ee462ee79f..51f5dac42a00 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",