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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-7446) Implement CRC32C native code using SSE4.2 instructions
Date Tue, 12 Jul 2011 04:32:59 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-7446?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Todd Lipcon updated HADOOP-7446:
--------------------------------

    Attachment: hadoop-7446.txt

Patch on top of HADOOP-7444, HADOOP-7443, HADOOP-7445 in that order.

> 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
>
>
> 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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