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From "Chen Yang (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HARMONY-5146) [drlvm][gc]Allocation Prefetch in Garbage Collector
Date Mon, 19 Nov 2007 06:45:43 GMT

     [ https://issues.apache.org/jira/browse/HARMONY-5146?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Chen Yang updated HARMONY-5146:

    Attachment: alloc_prefetch.patch

Alloc prefetch support for GC of DRLVM

> [drlvm][gc]Allocation Prefetch in Garbage Collector
> ---------------------------------------------------
>                 Key: HARMONY-5146
>                 URL: https://issues.apache.org/jira/browse/HARMONY-5146
>             Project: Harmony
>          Issue Type: Improvement
>          Components: DRLVM
>         Environment: Win32/Win64/Linux32 have already been verified
>            Reporter: Chen Yang
>         Attachments: alloc_prefetch.patch
> Allocation Prefetch is known to be effective in improving the application performance,
this patch is based on the study on current allocation implementation in garbage collector
and has already been evaluated. Some options are provided:
>    -XX:gc.prefetch=true/false	                     ; to enable or disable the allocation
prefetch, default false
>    -XX:gc.zeroing_size=N		; to specify the number of bytes in group memset, default 256
>    -XX:gc.prefetch_stride=N		; to specify the number of bytes of prefetch stride, default
>    -XX:gc.prefetch_distance=N	                     ; to specify the number of bytes to
be prefetched, default 1024
>    To get the best performance, it is expected to select appropriate parameters.

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