sched: add configuration to record the busy waiting time #18078
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…get spinlock or enter critical section. Add configuration "CONFIG_SCHED_CRITMONITOR_MAXTIME_BUSYWAIT", which can record the busy waiting time to get spinlock or enter critical section. Signed-off-by: wangzhi16 <wangzhi16@xiaomi.com>
wangzhi16
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Area: File System
Because enter_critical_section() changes from calling spin_lock() to calling spin_lock_wo_note(), it is necessary to count the busywait time in enter_critical_section() additionally. Signed-off-by: wangzhi16 <wangzhi16@xiaomi.com>
acassis
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Jan 21, 2026
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@wangzhi16 nice feature! And as all new features we need some Documentation about it, please include it here: https://nuttx.apache.org/docs/latest/implementation/critical_sections.html
xiaoxiang781216
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Jan 21, 2026
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jerpelea
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Jan 22, 2026
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Summary
Add configuration "CONFIG_SCHED_CRITMONITOR_MAXTIME_BUSYWAIT", which can record the busy waiting time to get spinlock or enter critical section.
Impact
None
Testing
CONFIG_SCHED_CRITMONITOR=y
CONFIG_SCHED_CRITMONITOR_MAXTIME_BUSYWAIT>=0
ostest PASS