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From "Vladimir Ozerov (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (IGNITE-2316) Replace GridSpinBusyLock with improved version of GridStripedSpinBusyLock
Date Tue, 09 Feb 2016 06:27:18 GMT

     [ https://issues.apache.org/jira/browse/IGNITE-2316?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Vladimir Ozerov resolved IGNITE-2316.
    Resolution: Won't Fix

Profiling didn't show any benefit even in local benchmarks. Hence, closing as "Won't fix".

Implementation is attached. May be we will back to it later.

> Replace GridSpinBusyLock with improved version of GridStripedSpinBusyLock
> -------------------------------------------------------------------------
>                 Key: IGNITE-2316
>                 URL: https://issues.apache.org/jira/browse/IGNITE-2316
>             Project: Ignite
>          Issue Type: Sub-task
>          Components: general
>    Affects Versions: ignite-1.4
>            Reporter: Vladimir Ozerov
>            Assignee: Vladimir Ozerov
>             Fix For: 1.6
>         Attachments: GridStripedSpinBusyLock.java
> 1) GridStripedSpinBusyLock is not striped properly at the moment - produced AtomicIntegers
are located too close to each other to produce considerable amount of false-shares. To fix
it, int state of each lock should be padded with dummy values. This will give significant
throughput increase.
> 2) Then GridSpingBusyLock must be replaced with GridStripedSpinBusyLock all over the

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