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Posted to commits@harmony.apache.org by "Aleksey Shipilev (JIRA)" <ji...@apache.org> on 2008/03/18 16:41:24 UTC

[jira] Created: (HARMONY-5615) [drlvm] Large pages enabling for DRLVM

[drlvm] Large pages enabling for DRLVM
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                 Key: HARMONY-5615
                 URL: https://issues.apache.org/jira/browse/HARMONY-5615
             Project: Harmony
          Issue Type: Improvement
         Environment: Windows
            Reporter: Aleksey Shipilev


So far, only Java heap can be allocated with large pages. This issue enables allocation of internal VM structures with large pages.

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[jira] Updated: (HARMONY-5615) [drlvm] Large pages enabling for DRLVM

Posted by "Aleksey Shipilev (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/HARMONY-5615?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Aleksey Shipilev updated HARMONY-5615:
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    Attachment: vm-largePages.patch

vm-largePages.patch
Dirty POC patch:
 - introduces new VM option: -XX:vm.use_large_pages=(true|FALSE)
 - in use_large_pages=true mode allocates the memory both for code and data (so far in RWX mode)
 - rounds up the requested amount of memory to page size

Clean patch should meet these criterias:
 - allocate code regions with RWX mode, and data with RW
 - do more accurate rounding

> [drlvm] Large pages enabling for DRLVM
> --------------------------------------
>
>                 Key: HARMONY-5615
>                 URL: https://issues.apache.org/jira/browse/HARMONY-5615
>             Project: Harmony
>          Issue Type: Improvement
>         Environment: Windows
>            Reporter: Aleksey Shipilev
>         Attachments: vm-largePages.patch
>
>
> So far, only Java heap can be allocated with large pages. This issue enables allocation of internal VM structures with large pages.

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