Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\rcu\tree.c Create Date:2022-07-28 10:26:37
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Annotation kernel can get tool activityDownload SCCTChinese

Name:This function is invoked from each scheduling-clock interrupt,* and checks to see if this CPU is in a non-context-switch quiescent* state, for example, user mode or idle loop. It also schedules RCU* core processing

Proto:void rcu_sched_clock_irq(int user)

Type:void

Parameter:

TypeParameterName
intuser
2260  Tracepoint for start/end markers used for utilization calculations.* By convention, the string is of the following forms:* "Start " -- Mark the start of the specified activity,* such as "context switch". Nesting is permitted.
2261  raw_cpu_inc(ticks_this_gp)
2263  If smp_load_acquire(this_cpu_ptr( & rcu_urgent_qs)) Then
2265  If Not _is_cpu_rrupt_from_idle - see if interrupted from idle* If the current CPU is idle and running at a first-level (not nested)* interrupt from idle, return true. The caller must have at least* disabled preemption. && Not user Then
2266  set_tsk_need_resched(current process)
2267  We fold the NEED_RESCHED bit into the preempt count such that* preempt_enable() can decrement and test for needing to reschedule with a* single instruction.* We invert the actual bit, so that when the decrement hits 0 we know we both
2269  __this_cpu_write(rcu_urgent_qs, false)
2271  rcu_flavor_sched_clock_irq(user)
2272  If rcu_pending(user) Then invoke_rcu_core()
2275  Tracepoint for start/end markers used for utilization calculations.* By convention, the string is of the following forms:* "Start " -- Mark the start of the specified activity,* such as "context switch". Nesting is permitted.