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 14:52:13
Last Modify:2022-05-20 07:50:19 Copyright©Brick
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函数名称：Enable an event

函数原型：static void _perf_event_enable(struct perf_event *event)

返回类型：void

参数：

类型参数名称
struct perf_event *event
2828  ctx等于ctx
2830  关闭本地中断，获取所要保护的运行队列（runqueue）的自旋锁（spinlock），为查找可运行进程做准备。( & Protect the states of the events in the list,* nr_active, and the list:)
2831  如果state大于等于PERF_EVENT_STATE_INACTIVE或state小于PERF_EVENT_STATE_ERROR则
2833  raw_spin_unlock_irq( & Protect the states of the events in the list,* nr_active, and the list:)
2834  返回
2844  如果state恒等于PERF_EVENT_STATE_ERROR则state等于PERF_EVENT_STATE_OFF
2846  raw_spin_unlock_irq( & Protect the states of the events in the list,* nr_active, and the list:)
2848  event_function_call(event, Cross CPU call to enable a performance event, NULL)
调用者
名称描述
perf_event_enableSee perf_event_disable();
_perf_event_refresh
perf_event_modify_breakpoint