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https://issues.apache.org/jira/browse/HADOOP-7446?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Todd Lipcon updated HADOOP-7446:
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Attachment: hadoop-7446.txt
Patch rebased on trunk, and taking into account Kihwal's comments above.
I continued to use the gcc-specific macros inside an ifdef __GNUC__. If someone
wants to port this optimization to work on a different compiler, that would be
a good followup. I don't have anything else available to test with, here.
> Implement CRC32C native code using SSE4.2 instructions
> ------------------------------------------------------
>
> Key: HADOOP-7446
> URL: https://issues.apache.org/jira/browse/HADOOP-7446
> Project: Hadoop Common
> Issue Type: Improvement
> Components: native
> Reporter: Todd Lipcon
> Attachments: hadoop-7446.txt, hadoop-7446.txt
>
>
> Once HADOOP-7445 is implemented, we can get further performance improvements
> by implementing CRC32C using the hardware support available in SSE4.2. This
> support should be dynamically enabled based on CPU feature flags, and of
> course should be ifdeffed properly so that it doesn't break the build on
> architectures/platforms where it's not available.
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