tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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>
+80
+80
kernel/sysctl.c
+80
kernel/sysctl.c
···
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{ .ctl_name = 0 }
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};
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#ifdef CONFIG_SCHED_DEBUG
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static unsigned long min_sched_granularity_ns = 100000; /* 100 usecs */
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static unsigned long max_sched_granularity_ns = 1000000000; /* 1 second */
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static unsigned long min_wakeup_granularity_ns; /* 0 usecs */
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static unsigned long max_wakeup_granularity_ns = 1000000000; /* 1 second */
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#endif
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static ctl_table kern_table[] = {
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#ifdef CONFIG_SCHED_DEBUG
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "sched_granularity_ns",
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.data = &sysctl_sched_granularity,
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.maxlen = sizeof(unsigned int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &min_sched_granularity_ns,
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.extra2 = &max_sched_granularity_ns,
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},
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "sched_wakeup_granularity_ns",
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.data = &sysctl_sched_wakeup_granularity,
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.maxlen = sizeof(unsigned int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &min_wakeup_granularity_ns,
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.extra2 = &max_wakeup_granularity_ns,
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},
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "sched_batch_wakeup_granularity_ns",
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.data = &sysctl_sched_batch_wakeup_granularity,
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.maxlen = sizeof(unsigned int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &min_wakeup_granularity_ns,
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.extra2 = &max_wakeup_granularity_ns,
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},
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "sched_stat_granularity_ns",
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.data = &sysctl_sched_stat_granularity,
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.maxlen = sizeof(unsigned int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &min_wakeup_granularity_ns,
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.extra2 = &max_wakeup_granularity_ns,
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},
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "sched_runtime_limit_ns",
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.data = &sysctl_sched_runtime_limit,
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.maxlen = sizeof(unsigned int),
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.mode = 0644,
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.proc_handler = &proc_dointvec_minmax,
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.strategy = &sysctl_intvec,
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.extra1 = &min_sched_granularity_ns,
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.extra2 = &max_sched_granularity_ns,
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},
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "sched_child_runs_first",
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.data = &sysctl_sched_child_runs_first,
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.maxlen = sizeof(unsigned int),
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.mode = 0644,
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.proc_handler = &proc_dointvec,
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},
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "sched_features",
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.data = &sysctl_sched_features,
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.maxlen = sizeof(unsigned int),
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.mode = 0644,
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.proc_handler = &proc_dointvec,
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},
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#endif
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{
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.ctl_name = KERN_PANIC,
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.procname = "panic",