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Posted to commits@harmony.apache.org by "Aleksey Shipilev (JIRA)" <ji...@apache.org> on 2008/03/23 22:23:24 UTC

[jira] Updated: (HARMONY-5637) [drlvm][classloader][performance] Make ClassLoader.loadClass desynchronized while trying to load already loaded class

     [ https://issues.apache.org/jira/browse/HARMONY-5637?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Aleksey Shipilev updated HARMONY-5637:
--------------------------------------

    Attachment: 0005-serial-loadClass.patch

0005-serial-loadClass.patch
Proof-of-concept patch. Eliminates ~10% of contended locks on SerialBench.

> [drlvm][classloader][performance] Make ClassLoader.loadClass desynchronized while trying to load already loaded class
> ---------------------------------------------------------------------------------------------------------------------
>
>                 Key: HARMONY-5637
>                 URL: https://issues.apache.org/jira/browse/HARMONY-5637
>             Project: Harmony
>          Issue Type: Improvement
>            Reporter: Aleksey Shipilev
>         Attachments: 0005-serial-loadClass.patch
>
>
> Current implementation of ClassLoader acquires the lock on every loadClass entry. However, if the class is already loaded/initialized we might skip synchronization. This would make ClassLoader perform faster on serialization and startup workloads.

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