Android

9355 readers

1 users here now

A place to discuss anything related to Android or Android adjacent.

INFO:

No attacking others based on their phone preferences. Criticizing OEMs/devices is allowed. Attacking users because a different brand/device works for them isn't.
Obvious spam will be removed.
Anything directly or indirectly related to Android is allowed.

Check Out Our Partner Communities:

[email protected]

founded 4 years ago

MODERATORS

[email protected]

How does sleep really work in the Android kernel? (ma.fellr.net)

submitted 1 year ago by [email protected] to c/[email protected]

6 comments fedilink hide all child comments

How does sleep really work in the Android kernel?

I've been wondering about this for a while, but couldn't find anything about it. What exactly happens after the screen turns off? Does the kernel actually suspend and halt the CPU? If so, how are notifications received while sleeping? Is there a coprocessor involved?

I'm curious. It would be great if someone could point me towards some articles or videos about this.

@[email protected] @[email protected] @[email protected] @[email protected] #android #linux #kernel #sleep #suspend

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 2 points 1 year ago

Earlier I've read that it only keeps a single CPU core as active, at least for most of the time sleeping. But take this with a grain of salt, it was long ago so I may misremembered it, and also it might have changed a lot since then, but afaik this was a technique they once used (and may still do)