[jira] Updated: (HARMONY-5171) [drlvm][jit][opt] Allocation prefetch and memset in java helpers

["Mikhail Fursov (JIRA)" <ji...@apache.org>]

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

Mikhail Fursov updated HARMONY-5171:
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    Summary: [drlvm][jit][opt] Allocation prefetch and memset in java helpers  (was: [drlvm][jitrino][opt] Allocation prefetch and memset in java helpers)

> [drlvm][jit][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
>            Assignee: Mikhail Fursov
>         Attachments: gc_magics-jit_part.patch, gc_magics-jit_part.v2.patch, 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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