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https://issues.apache.org/jira/browse/SPARK-12181?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15045309#comment-15045309
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Ted Yu commented on SPARK-12181:
--------------------------------
We can add method to Platform which performs check on the architecture.
In MemoryManager.scala, when "spark.unsafe.offHeap" is true but the above check
doesn't pass, raise exception.
Comment is welcome.
> Check Cached unaligned-access capability before using Unsafe
> ------------------------------------------------------------
>
> Key: SPARK-12181
> URL: https://issues.apache.org/jira/browse/SPARK-12181
> Project: Spark
> Issue Type: Bug
> Reporter: Ted Yu
>
> For MemoryMode.OFF_HEAP, Unsafe.getInt etc. are used with no restriction.
> However, the Oracle implementation uses these methods only if the class
> variable unaligned (commented as "Cached unaligned-access capability") is
> true, which seems to be calculated whether the architecture is i386, x86,
> amd64, or x86_64.
> I think we should perform similar check for the use of Unsafe.
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