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Posted to issues@arrow.apache.org by "Jacob Wujciak-Jens (Jira)" <ji...@apache.org> on 2022/08/02 09:49:00 UTC

[jira] [Created] (ARROW-17281) [C++] Windows reports aggregated L-Cache sizes

Jacob Wujciak-Jens created ARROW-17281:
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             Summary: [C++] Windows reports aggregated L-Cache sizes
                 Key: ARROW-17281
                 URL: https://issues.apache.org/jira/browse/ARROW-17281
             Project: Apache Arrow
          Issue Type: Bug
          Components: C++
    Affects Versions: 9.0.0
            Reporter: Jacob Wujciak-Jens


On Windows 10 Version 10.0.19044 Build 19044 {{CpuInfo::CacheLevel}} over reports the L-cache size:
640K for L1
10M for L2
It seems that windows is reporting the total size of cache for each core aggregated as one value. Possibly due to "intel smart cache" cache sharing?



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