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From "Aleksey Shipilev (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HARMONY-5639) [drlvm][classloader][performance] Make native class/method/field lookups unsynchronized
Date Sun, 23 Mar 2008 21:33:24 GMT

     [ https://issues.apache.org/jira/browse/HARMONY-5639?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Aleksey Shipilev updated HARMONY-5639:

    Attachment: 0007-serial-vmClassloader.patch

Proof-of-concept patch.

Eliminates up to 70% of contended synchronization on SerialBench (8-core Clovertown).

> [drlvm][classloader][performance] Make native class/method/field lookups unsynchronized
> ---------------------------------------------------------------------------------------
>                 Key: HARMONY-5639
>                 URL: https://issues.apache.org/jira/browse/HARMONY-5639
>             Project: Harmony
>          Issue Type: Improvement
>            Reporter: Aleksey Shipilev
>         Attachments: 0007-serial-vmClassloader.patch
> Current implementation of classloader obtains the lock on any resolve operation, basically
performing synchronized lookup in constant pool. The suggestion is to perform such lookups
at fastpath desychronized, on failure obtain the lock and lookup again.

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