check_preempt_tick

Name:Preempt the current task with a newly woken task if needed:

Proto:static void check_preempt_tick(struct cfs_rq *cfs_rq, struct sched_entity *curr)

Type:void

Parameter:

Type	Parameter	Name
struct cfs_rq *	cfs_rq
struct sched_entity *	curr

4139

ideal_runtime = We calculate the wall-time slice from the period by taking a part* proportional to the weight.* s = p*P[w/rw]

4140

delta_exec = sum_exec_runtime - prev_sum_exec_runtime

4141

If delta_exec > ideal_runtime Then

4142

sched_curr - mark rq's current task 'to be rescheduled now'.* On UP this means the setting of the need_resched flag, on SMP it* might also involve a cross-CPU call to trigger the scheduler on* the target CPU.

4147

clear_buddies(cfs_rq, curr)

4148

Return

4156

If delta_exec < Minimal preemption granularity for CPU-bound tasks:* (default: 0.75 msec * (1 + ilog(ncpus)), units: nanoseconds) Then Return

4159

se = __pick_first_entity(cfs_rq)

4160

delta = vruntime - vruntime

4162

If delta < 0 Then Return

4165

If delta > ideal_runtime Then sched_curr - mark rq's current task 'to be rescheduled now'.* On UP this means the setting of the need_resched flag, on SMP it* might also involve a cross-CPU call to trigger the scheduler on* the target CPU.

**Caller**
Name	Describe
entity_tick

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Support c/c++/esqlc/java Oracle/Informix/Mysql Plug-in can realize: logical Report Code generation and batch code conversion