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 14:51:09
Last Modify:2022-05-20 07:50:19 Copyright©Brick
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函数名称：__perf_event_read_size

函数原型：static void __perf_event_read_size(struct perf_event *event, int nr_siblings)

返回类型：void

参数：

类型参数名称
struct perf_event *event
intnr_siblings
1706  entry等于sizeof(u64)
1707  size等于0
1708  nr等于1
1710  如果read_format按位与PERF_FORMAT_TOTAL_TIME_ENABLED则size加等于sizeof(u64)
1713  如果read_format按位与PERF_FORMAT_TOTAL_TIME_RUNNING则size加等于sizeof(u64)
1716  如果read_format按位与PERF_FORMAT_ID则entry加等于sizeof(u64)
1719  如果read_format按位与PERF_FORMAT_GROUP则
1720  nr加等于nr_siblings
1721  size加等于sizeof(u64)
1724  size加等于entry乘nr
1725  read_size等于size
调用者
名称描述
perf_event__header_sizeCalled at perf_event creation and when events are attached/detached from a* group.
perf_event_validate_size