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From "yuqi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-13326) Support unaligned memory access for AArch64
Date Thu, 16 Mar 2017 02:43:41 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-13326?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15927372#comment-15927372
] 

yuqi commented on CASSANDRA-13326:
----------------------------------

In CLIbrary, nothing need to happen for AArch64.   The macros used by ARM system call mlockall
,  'MCL_CURRENT' & 'MCL_FUTURE', are the same values(1 & 2)  as the the non-PPC path.

>  Support unaligned memory access for AArch64 
> ---------------------------------------------
>
>                 Key: CASSANDRA-13326
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-13326
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Observability, Testing
>         Environment: ARM Cortex-A57@2.1GHz (Hisilicon Taishan/ Cavium ThunderX)
> Ubuntu 16.04.1 LTS 
>            Reporter: yuqi
>            Assignee: yuqi
>            Priority: Minor
>             Fix For: 4.0, 3.11.x
>
>         Attachments: 13326-3.10.txt
>
>
> ARMv8 (AArch64)  supports unaligned memory access. The patch will enable it and will
improve performance on AArch64



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