[jira] Resolved: (HARMONY-5916) [classlib][pack200] Isolating I/O and processing stages

["Sian January (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HARMONY-5916?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sian January resolved HARMONY-5916.
-----------------------------------

       Resolution: Fixed
    Fix Version/s: 5.0M7

Patch applied at r678796.  Please check that it was applied as expected.

> [classlib][pack200] Isolating I/O and processing stages 
> --------------------------------------------------------
>
>                 Key: HARMONY-5916
>                 URL: https://issues.apache.org/jira/browse/HARMONY-5916
>             Project: Harmony
>          Issue Type: Improvement
>          Components: Classlib
>         Environment: Latest pack200
>            Reporter: Aleksey Shipilev
>            Assignee: Sian January
>             Fix For: 5.0M7
>
>         Attachments: pack200-isolate-v2.patch, pack200-isolate-v3.patch, pack200-isolate-v4.patch
>
>
> So far the unpacking in pack200 implementation is strongly coupled with I/O. Because I/O is essentially serial, there's no opportunity for paralleling the unpacking. This issue breaks the unpacking into three parts: reading, processing and writing. The target is to concentrate as much as possible work into the processing stage, decoupling it from I/O. Then the processing stage could be done concurrently on multiple Segments.

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