What is the interaction between autosleep and epoll?

Question

linux

In general, I had to read the manual translated into Russian: epoll (7) ru.manpages.org/epoll/7 and the Question appeared: how to save electricity and computer resources? because there is autosleep !? Tell me what kind of entity is this and why is it not in modern distributions? To understand my problem: there are listening sockets and needed after epoll_wait(). start the computer from (probably) standby mode

Answer 1

because there is autosleep !? Tell me what kind of entity is this and why is it not in modern distributions?

Because it's an android feature. But if you want, you can rebuild the desktop kernel and enable CONFIG_AUTOSLEEP in it.
Waking up the machine on an event in a peripheral device is the business of the device driver together with the device itself, it has nothing to do with the userspace and epoll_wait.