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From "Dmitry Pronichkin (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HARMONY-5171) [drlvm][jitrino][opt] Allocation prefetch and memset in java helpers
Date Thu, 22 Nov 2007 09:55:43 GMT

     [ https://issues.apache.org/jira/browse/HARMONY-5171?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Dmitry Pronichkin updated HARMONY-5171:
---------------------------------------

    Attachment: GC_magics.patch

This is the first version of patch. The code generation for prefetch and memset0 will be improved
further.

> [drlvm][jitrino][opt] Allocation prefetch and memset in java helpers
> --------------------------------------------------------------------
>
>                 Key: HARMONY-5171
>                 URL: https://issues.apache.org/jira/browse/HARMONY-5171
>             Project: Harmony
>          Issue Type: Improvement
>          Components: DRLVM
>         Environment: IA-32
>            Reporter: Dmitry Pronichkin
>         Attachments: GC_magics.patch
>
>
> GC allocation helper currently goes to native code if memory for allocation is not cleared.
This improvement allows to make memory clearing and allocation prefetch in GChelper using
two new VMHelpers - prefetch (Address addr, int prefetch_distance, int prefetch_stride) and
memset0 (Address addr, int zeroing_size). Three new parameters - prefetch_distance, prefetch_stride
and zeroing_size - are taken from native GC.

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