Joe McDonnell created IMPALA-14715:
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Summary: AVX2 detection in be/src/kudu/util is broken
Key: IMPALA-14715
URL: https://issues.apache.org/jira/browse/IMPALA-14715
Project: IMPALA
Issue Type: Bug
Components: Backend, Infrastructure
Affects Versions: Impala 5.0.0
Reporter: Joe McDonnell
On x86_64, we're seeing that AVX2 is not being detected even though the system
supports it:
{noformat}
2026-01-30 12:38:12 - INFO-root::util|421:: Compiler does not support
AVX2{noformat}
This is happening for the be/src/kudu/util detection
([https://github.com/apache/impala/blob/6a0eedf4af137828257529501ace360208af0a3c/be/src/kudu/util/CMakeLists.txt#L293-L300]
), but it is not happening for the be/src/util detection
([https://github.com/apache/impala/blob/6a0eedf4af137828257529501ace360208af0a3c/be/src/util/CMakeLists.txt#L125-L131]
). It looks like this changed when we rebased Kudu.
Kudu's check seems to work in their project, but not for us. It's unclear what
is different.
This disables AVX2 support for block bloom filters, costing us performance.
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