Add support for native extensions on linux aarch64

[tehrengruber]

This is based upon the work in #330 and extended to also work on aarch64 (I briefly tested this on a Nvidia GH200). There are still some minor cleanups needed, hope I'll find a spare minute soon.

[benfred]

thanks for the PR!

I briefly tested this on a Nvidia GH200

Thats a pretty nice machine to be testing on =)

There are still some minor cleanups needed, hope I'll find a spare minute soon.

the changes here look pretty good to me - what are the other changes you were thinking of?

[SimonHeim]

I have tried building this branch on Asahi Linux (M1 Mac mini) and get the message:

./py-spy record -n -d 5 -- python -c "import numpy as np"
Collecting stack traces from native extensions (`--native`) is not supported on your platform.

Is there something I am missing?

[benfred]

@SimonHeim did you build with 'cargo build --release --features unwind' ?

You can also get the binaries from the GitHub actions artifacts , which should have precompiled wheels with this support built in.

[SimonHeim]

@SimonHeim did you build with 'cargo build --release --features unwind' ?

You can also get the binaries from the GitHub actions artifacts , which should have precompiled wheels with this support built in.

@benfred

This was the problem. Thanks. I am running my workload now. I may take a stab at adding support for --native on MacOS arm64.

[SimonHeim]

While running this on my asahi m1 mini, py-spy begins to fall behind when sampling at 100Hz. Is this expected? I have been able to profile the same workload with perf trampoline support at 10kHz.

...
py-spy> 36.81s behind in sampling, results may be inaccurate. Try reducing the sampling rate
py-spy> 37.32s behind in sampling, results may be inaccurate. Try reducing the sampling rate
py-spy> 37.90s behind in sampling, results may be inaccurate. Try reducing the sampling rate
py-spy> 38.49s behind in sampling, results may be inaccurate. Try reducing the sampling rate
....

[camblomquist]

I'm also seeing issues with falling behind when sampling at 100Hz, tested on an Orin NX and a Raspberry Pi 4. Tried running py-spy under perf on the Pi but realized soon after that I didn't really know what I was looking at. I've attached the compressed perf.data (212MB unzipped) in case it's helpful to anyone.
perf.zip