GitHub user tedyu opened a pull request:
https://github.com/apache/spark/pull/11943
[SPARK-12181] Check Cached unaligned-access capability before using Unsafe
## What changes were proposed in this pull request?
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.
## How was this patch tested?
Unit test suite
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/tedyu/spark master
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/11943.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #11943
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commit ed7064690de566270ec7dbc02870a3e08dd17f2d
Author: tedyu <yuzhih...@gmail.com>
Date: 2016-03-24T20:37:37Z
[SPARK-12181] Check Cached unaligned-access capability before using Unsafe
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