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From "Aleksey Shipilev (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HARMONY-5615) [drlvm] Large pages enabling for DRLVM
Date Tue, 18 Mar 2008 15:45:24 GMT

     [ https://issues.apache.org/jira/browse/HARMONY-5615?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Aleksey Shipilev updated HARMONY-5615:
--------------------------------------

    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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