Earlier quoted context omitted.
No, you don't. Encoding a video should not be CPU, so let's get that out of there. Most of the rest is more GPU dependent than CPU dependent. The amount of CPU time you should be spending on these tasks is really low. For example, web browsing and reading , the CPU should be asleep most of the time. Now, don't get me wrong, there are plenty of very silly little tasks for A53's to do, but what you listed are not those…
The amount of CPU time you should be spending on these tasks is really low. Which is exactly the point. They are not CPU intensive, but the CPU is constantly doing a multitude of little things, whether simply moving memory around from the GPU to storage, sending the render buffers for the 60fps display, etc. Another comment mentioned, rightly, that cores are put to sleep in they don't have anything to do in a quantum…
This is 100% false. I do bringup on these platforms. I know a lot about them.
"I'm going to favor the industry's interpretation of this a bit more than your anecdotal, occasional compiler-writer knowledge. "
Dude, i literally do the toolchain bringup on these platforms you claim i have no knowledge of. This is not "anecdotal occasional compiler-writer knowledge". This is "I get paid to make the stuff you keep talking about work fast and get good battery life out of it".
If what you say was true, then one would expect that when they were brought up, they would have worse performance and better battery life. Instead, the exact opposite is true in most cases. They have slightly better performance, and much worse battery life. Try it sometime.
Battery life is gotten back mainly through .. wait for it ... compiler optimization ... to speed up the software so things can sleep faster.
Not to "move things onto the little cores to save power", as you seem to think.
Since you want to attack my experience, remind me again, what background do you have in this again? (FWIW - I would stay away from this argument line as it is unlikely to serve you well)
As swetland (who was android's main kernel guy for a long time) pointed out to you, you literally have no idea what you are talking about when it comes to CPU sleeping and what the main power policies are.
BTW, much earlier i asked if you had anything other than self-serving industry press releases to back up your claims. I'm guessing the answer is "no", given what you've written.
Anyway, i'm going to stop responding now, because i'm just some anecdotal compiler writer, and clearly i can't compete with your vast knowledge store and experience on this one.