epoll_wait - waits for an I/O event on an epoll file descriptor
epoll_wait is a system call used to wait for I/O events on an epoll file descriptor. It is similar to
poll, but with better scalability for large numbers of monitored file descriptors. It returns when either an I/O event has been detected or the timeout has expired.
The main advantage of using
epoll_wait is increased scalability, since
select perform worse as the number of monitored events increases. However, there are some drawbacks to using
epoll_wait. For example,
epoll_wait is not a real-time system call, meaning that there can be a significant lag between events being triggered and them being handled by
epoll_wait can be more complicated to use since it requires a more involved setup procedure.
int- the epoll file descriptor created with
struct epoll_event*[U] - pointer to a buffer where the events will be returned
int- the maximum number of events that can be returned
int- the timeout in milliseconds; or -1 to wait indefinitely
- U - Originated from user space (for example, pointer to user space memory used to get it)
To trace I/O events on an epoll file descriptor
Example Use Case¶
An example use case for
epoll_wait would be a real-time application that needs to process incoming network traffic.
There is a known bug in
epoll_wait related to the
maxevents argument. If the
maxevents argument is greater than the number of available events, the
timeout argument may not be taken into account correctly.
epoll_ctl- add or delete file descriptors to/from an epoll file descriptor
epoll_create- create a new epoll file descriptor
epoll_create1- create a new epoll file descriptor
This document was automatically generated by OpenAI and needs review. It might not be accurate and might contain errors. The authors of Tracee recommend that the user reads the "events.go" source file to understand the events and their arguments better.