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From "Aleksey Shipilev (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HARMONY-5829) [drlvm][kernel][performance] j.l.Class Serializable/Externalizable caching
Date Thu, 15 May 2008 20:08:55 GMT

     [ https://issues.apache.org/jira/browse/HARMONY-5829?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Aleksey Shipilev updated HARMONY-5829:
--------------------------------------

    Attachment: vm-kernel-serializable-externalizable-cache-rc1.patch

vm-kernel-serializable-externalizable-cache-rc1.patch
Proposed patch.

Patch is pretty trivial, but gives +15% on MT/SerialBench on 2-core Core2.

> [drlvm][kernel][performance] j.l.Class Serializable/Externalizable caching
> --------------------------------------------------------------------------
>
>                 Key: HARMONY-5829
>                 URL: https://issues.apache.org/jira/browse/HARMONY-5829
>             Project: Harmony
>          Issue Type: Sub-task
>          Components: DRLVM
>            Reporter: Aleksey Shipilev
>         Attachments: vm-kernel-serializable-externalizable-cache-rc1.patch
>
>
> Serialization workloads relies on Class.isAssignableFrom(...) when looking up Serializable
and Externalizable properties (that is, implementation of interfaces). For now, DRLVM kernel
classes perform lookups on each invocation. This issue caches the mentioned properties in
Class fields and does not go to native VMClassRegistry for resolution.

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