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Had been using this quite some time ago, it is sad that it has only 1-CPU support, preventing some SMP bugs from emerging.

Wonder if it's hard to make it SMP, if too many places use something like #ifdef CONFIG_ARCH_IS_UM to tell whether it is single CPU, it might be hard.

Same here.

When would Apple silicons made natively support for OSes such as Linux? Apple seemlingly reluctant to release detailed technical reference manual for M-series SoCs, which makes running Linux natively on Apple silicon challenging.

Reminds me of User Mode Linux, which AFAIK, runs only on Linux, maybe *nix.

Nope, mine runs on a native Linux box featuring Intel i7-1370P and 32GB RAM. Maybe Xilinx has some tuning which makes Yocto become slow at parsing the recipe dependency and the likes.

I've tried asking the Xilinx community, and got only a reply saying that there is a database in Yocto which limits the scalability.

Your scenario makes me suspecting that it is Xilinx flavored Yocto causing the problem. I think that removing some unused Xilinx-specific layers/recipes can reduce the prologue and epilogue execution time.

Got me wondering, how does it works?

Out of curious, does BPF now capable of capturing all the context switch events such as CPU trap?

Also, if the overhead is negligible, maybe the author can try to merge this into mainline with the use of static key to make the incurred overhead switchable. In spite of the static key, the degree of the accompanied inteferences on cache and branch predictor might be an intriguing topic though.

If this is the case, it's weird then. Why releasing CPU for only a glimpse saves battery?

Sure, I'd try remove the app from the power efficiency restricted app list, which by default are enforced on all apps.

Yes, I was using Bluetooth headphones at the moment. I don't have the app name at hand, but I know that the app is also a file manager.

So there's probably jitter in my headphones, or the app was not suppose to do music playback smoothly because that's not its main usage.

Nope, mine is a playlist with only 3 local-stored tracks. Yes, I loop these 3 tracks all the time.