Example: Probe at exit of read system call all processes.
示例：读取系统调用所有进程的出口的探针。
All the read system calls eventually call soreceive .
所有的read系统调用最终调用soreceive 。
Read event occurrence data through a read() system call.
通过read()系统调用读取事件发生数据。
Wait on event occurrences with the select() (or a blocking read()) system call.
使用select()（或阻塞的read()）系统调用等待事件发生。
Wait on event occurrences with the select() (or a blocking read()) system call.
使用select()（或阻塞的read()）系统调用等待事件发生。
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