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https://issues.apache.org/jira/browse/IMPALA-14715?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18056008#comment-18056008
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Joe McDonnell commented on IMPALA-14715:
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This seems to be specific to our version of CMake (3.22.2). It works fine for
system CMake on Ubuntu 22 (3.22.1 but maybe patched) and it works fine for
CMake 3.31.10.
> 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
> Assignee: Joe McDonnell
> Priority: Blocker
>
> 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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