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https://issues.apache.org/jira/browse/ARROW-17281?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yibo Cai reassigned ARROW-17281:
--------------------------------
Assignee: Yibo Cai
> [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
> Assignee: Yibo Cai
> Priority: Minor
>
> On Windows 10 Version 10.0.19044 Build 19044 {{CpuInfo::CacheLevel}} over
> reports the L-cache size:
> 640K for L1
> 10M for L2
> These values are also reported by Windows resource monitor.
> 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?
> {code:bash}
> [----------] 1 test from CpuInfo
> [ RUN ] CpuInfo.Basic
> C:/tmp/arrow-verify-release/apache-arrow-9.0.0/cpp/src/arrow/util/io_util_test.cc(1036):
> error: Value of: l1 >= 4 * 1024 && l1 <= 512 * 1024
> Actual: false
> Expected: true
> unexpected L1 size: 655360
> [ FAILED ] CpuInfo.Basic (0 ms)
> [----------] 1 test from CpuInfo (0 ms total)
> {code}
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