raulcd commented on issue #49640:
URL: https://github.com/apache/arrow/issues/49640#issuecomment-4176272079
I've been able to replicate and got to this specific function registration
`arrow::compute::internal::AddSumAvx2AggKernels(arrow::compute::ScalarAggregateFunction*)`
from the backtrace:
```
Reading
/home/raulcd/code/test-avx/lib/python3.13/site-packages/pyarrow/_compute.cpython-313-x86_64-linux-gnu.so
from remote target...
[New Thread 70315.70417]
...
Thread 1 received signal SIGILL, Illegal instruction.
0x00007fda73a3cb42 in
arrow::compute::internal::AddSumAvx2AggKernels(arrow::compute::ScalarAggregateFunction*)
()
from
target:/home/raulcd/code/test-avx/lib/python3.13/site-packages/pyarrow/libarrow_compute.so.2300
```
The guard seems correct to me:
https://github.com/apache/arrow/blob/82847d8f6dae87e709d284b4b871da1424e93a25/cpp/src/arrow/compute/kernels/aggregate_basic.cc#L1065-L1069
It seems that we pick the flags from `/proc/cpuinfo` and that contains the
host CPU flags not the target so it seems to me that is an issue under qemu.
cc @AntoinePrv @pitrou what are your thoughts?
BTW `ARROW_USER_SIMD_LEVEL` works for me:
```
$ qemu-x86_64 -cpu Westmere -L / -E ARROW_USER_SIMD_LEVEL=SSE4_2 $(which
python) -c 'import pyarrow._compute; import pyarrow; print(pyarrow.__version__)'
23.0.1
```
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