函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\events\core.c Create Date:2022-07-27 14:52:59
Last Modify:2022-05-20 07:50:19 Copyright©Brick
首页 函数Tree
注解内核,赢得工具下载SCCTEnglish

函数名称：Called from scheduler to add the events of the current task* with interrupts disabled.* We restore the event value and then enable it.* This does not protect us against NMI, but enable()* sets the enabled bit in the control field of event _before_

函数原型：void __perf_event_task_sched_in(struct task_struct *prev, struct task_struct *task)

返回类型：void

参数：

类型参数名称
struct task_struct *prev
struct task_struct *task
3617  如果atomic_read(this_cpu_ptr( & perf_cgroup_events))则perf_cgroup_sched_in(prev, task)
3621  ctx等于perf_event_ctxp[ctxn]
3622  如果此条件成立可能性大(为编译器优化)(!ctx)则继续下一循环
3625  perf_event_context_sched_in(ctx, task)
3628  如果atomic_read( & nr_switch_events)则perf_event_switch(task, prev, true)
3631  如果Operations for contexts that are safe from preemption/interrupts. These* operations verify that preemption is disabled.(perf_sched_cb_usages)则This function provides the context switch callback to the lower code* layer. It is invoked ONLY when the context switch callback is enabled.* This callback is relevant even to per-cpu events; for example multi event