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From "George Timoshenko (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HARMONY-3063) [drlvm][jit] ArrayCopyRepMove does not work on EM64T
Date Tue, 06 Feb 2007 06:11:06 GMT

     [ https://issues.apache.org/jira/browse/HARMONY-3063?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

George Timoshenko updated HARMONY-3063:
---------------------------------------

    Attachment: arraycopy_rep_move_em64t_default_OFF.patch

harmony vm in default mode is faster than RI on the microbenchmark.

But in OPT mode turning genArrayCopyRepMove ON gives performance degradation.

Attached patch sets genArrayCopyRepMove OFF by default on em64t
and ON for others.

To turn the switch on/off (rejecting default value) use -XDjit.arg.genArrayCopyRepMove=true/false


> [drlvm][jit] ArrayCopyRepMove does not work on EM64T
> ----------------------------------------------------
>
>                 Key: HARMONY-3063
>                 URL: https://issues.apache.org/jira/browse/HARMONY-3063
>             Project: Harmony
>          Issue Type: Bug
>          Components: DRLVM
>         Environment: EM64T
>            Reporter: George Timoshenko
>         Assigned To: Alexey Varlamov
>         Attachments: arraycopy_rep_move_em64t_default_OFF.patch, arraycopy_rep_move_em64t_enabling.patch
>
>
> The optimisation crashes on EM64T. In particular SPECjbb2005 fils with enabled genArrayCopyRepMove
switch.

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