[jira] [Resolved] (IMPALA-14715) AVX2 detection in be/src/kudu/util is broken

["Michael Smith (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IMPALA-14715?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael Smith resolved IMPALA-14715.
------------------------------------
    Fix Version/s: Impala 5.0.0
       Resolution: Fixed

> 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
>             Fix For: Impala 5.0.0
>
>
> 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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