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From "Aleksey Shipilev (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HARMONY-5633) [drlvm][performance] ObjectStreamClass lookup improvement
Date Sun, 23 Mar 2008 19:57:24 GMT

    [ https://issues.apache.org/jira/browse/HARMONY-5633?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12581421#action_12581421

Aleksey Shipilev commented on HARMONY-5633:

This POC patch gives up to +80% boost on MT/SerialBench running at 8-core Clovertown.

> [drlvm][performance] ObjectStreamClass lookup improvement
> ---------------------------------------------------------
>                 Key: HARMONY-5633
>                 URL: https://issues.apache.org/jira/browse/HARMONY-5633
>             Project: Harmony
>          Issue Type: Improvement
>            Reporter: Aleksey Shipilev
>         Attachments: 0001-serial-lookupClass.patch
> For now, ObjectStreamClass (OSC) is created on-the-fly during serialization/deserialization
and stored in static cache.
> Performance problems arose when several threads doing the lookups, hitting on synchronized
cache. Moreover, the cache is built around WeakHashMap to ensure GC of OSCs. This issue is
the source of scalability problems for multi-threaded serialization benchmarks.

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