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Android Performance Ideas

Asynchronous Shader Compilation?

💡 asynchronous shader compilation is probably a bad idea, tiered shader compilation though…… lots of effort

The idea is that if you have two compilers, one fast at compiling but generates slow code, and one slow at compiling but generates fast code, you can use the first and replace it with the second when it completes. Citra has a shader compiler that runs shaders on the CPU which could be used as a first tier and the slower hardware shaders would be the second tier This of course assumes that shaders are the issue to begin with @merry on [#development discord chat]

Android Devices can be notoriously bad about throttling. What have we tried to prevent CPU from throttling?

See: https://discord.com/channels/220740965957107713/878088629455573002/878322621765287947

Copy Drastic's trick to keep thread on BIG core

We've looked into doing what drastic does: keep the process running intense math instructions to keep it on a hot core. Iirc it didn't help because Citra is already heavy enough. @BreadFish64 -- drastic's math thing was designed to trick classic big.LITTLE with only 2 core clusters (that's what I have on my phone), but in Qualcomm's mess of prime/gold/silver cores, it would seem we need to increase the load on the JIT thread itself so that thread stays scheduled on the correct core at the correct frequencies. @xperia64

How about setSustainedPerformanceMode?

💡 Android Source > AOSP > Configure > Power > Performance Management > Sustained Performance

at least on Snapdragon 845 (Lume Pad) enabling this option doesn't seem to help TODO could at least add it as a configurable option for users to test on other chipsets

Have we tried setThreadPriority?

setThreadPriority won't help unprivileged applications aren't allowed to set niceness < 0, and Android apparently will already give you -2 when you're the foreground app. @xperia64 on [#development discord chat]

Allow Frame Skip?

Q: could we enable frameskipping for android? 30fps locked is better than stuttery 40-60fps

We can't do frame skipping reliably because the 3DS renders to arbitrary frame buffers in memory. The DS was probably the last console you could get away with that. @BreadFish64 on #development discord chat