wq_select_unbound

函数名称：When queueing an unbound work item to a wq, prefer local CPU if allowed* by wq_unbound_cpumask. Otherwise, round robin among the allowed ones to* avoid perturbing sensitive tasks.

函数原型：static int wq_select_unbound_cpu(int cpu)

返回类型：int

参数：

类型	参数	名称
int	cpu

1366

如果此条件成立可能性大(为编译器优化)(!wq_debug_force_rr_cpu)则

1367

如果测试CPU信息则返回:cpu

1369

否则如果非printed_dbg_warning则

1370

打印警告信息("workqueue: round-robin CPU selection forced, expect performance impact\n")

1371

printed_dbg_warning = true

1374

如果pumask_empty - *srcp == 0*@srcp: the cpumask to that all cpus < nr_cpu_ids are clear.则返回:cpu

1377

new_cpu等于Operations for contexts that are safe from preemption/interrupts. These* operations verify that preemption is disabled.(CPU where unbound work was last round robin scheduled from this CPU )

1378

new_cpu等于cpumask_next_and(new_cpu, PL: allowable cpus for unbound wqs and work items , cpu_online_mask)

1379

如果此条件成立可能性小(为编译器优化)(new_cpu >= nr_cpu_ids)则

1380

new_cpu等于cpumask_first_and - return the first cpu from *srcp1 & *srcp2*@src1p: the first input*@src2p: the second input* Returns >= nr_cpu_ids if no cpus set in both. See also cpumask_next_and().(PL: allowable cpus for unbound wqs and work items , cpu_online_mask)

1381

如果此条件成立可能性小(为编译器优化)(new_cpu >= nr_cpu_ids)则返回:cpu

1384

__this_cpu_write(CPU where unbound work was last round robin scheduled from this CPU , new_cpu)

1386

返回:new_cpu

**调用者**
名称	描述
__queue_work

源代码转换工具开放的插件接口	X
支持：c/c++/esqlc/java Oracle/Informix/Mysql 插件可实现：逻辑报告代码生成和批量转换代码

函数逻辑报告