Illegal Instruction when AVX is not available on the Host

[piotr-k-k]

Hi, unfortunatelly I get unhandled exception trying run Whisper.net.Demo and I can't deal with it.
Unhandled exception at 0x00007FFB6C6B3441 (whisper.dll) in Whisper.net.Demo.exe: 0xC000001D: Illegal Instruction.
at line
NativeMethods.whisper_full_with_state(currentWhisperContext, state, whisperParams, (IntPtr)pData, samples.Length);
VS2022, .NET 7, Whisper 1.4.7
Any suggestions?
Thanks

[sandrohanea]

Hello @piotr-k-k ,
Do you have any changes to Whisper.net.Demo?

Are you using some specific wav file that you can share in order to reproduce the issue?

Also, can you, please, try some examples from the "Examples" folder?
e.g. https://github.com/sandrohanea/whisper.net/tree/main/examples/Simple

[piotr-k-k]

Hello @sandrohanea, thank you for reply, no I didn't change anything and I used default kennedy.wav. I tested example Simple as well as my own test application, all with the same result.

[sandrohanea]

I still couldn't manage to reproduce the error. Can you, please, clarify the OS version and architecture(e.g. x64, arm64, x86) that you're using?

[piotr-k-k]

I used Windows 10 x64, today later or tomorrow maybe I will try other system and hardware.

[sandrohanea]

that is one of the systems that I'm using, and can confirm that it should work (just tested it).
Can you maybe try to re-install https://aka.ms/vs/17/release/vc_redist.x64.exe
Maybe for some reason you have some corrupted vc redistributable?

[sandrohanea]

Another possible issue might be similar with: https://stackoverflow.com/questions/59584105/illegal-instruction-from-vs-c-on-windows

Which CPU are you using?

[piotr-k-k]

Now I don't know what exactly CPU I use, I think it's some Intel Xeon, will check tomorrow. Thanks for tips, tomorrow I will continue deal with it.

[piotr-k-k]

I dealt with this problem by rebuilding whisper.cpp with disabled AVX2, so with set WHISPER_NO_AVX2 variable.

[sandrohanea]

Thanks for confirming @piotr-k-k ,
This might be address with a future runtime (e.g. Whisper.net.Runtime.NoAVX) which will disable AVX statically. However, the best way would be I think to do it similarly with ffmpeg (to use it only if it is available and to have runtime fallback => but that will require changes in whisper.cpp)