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Posted to commits@harmony.apache.org by "weldon washburn (JIRA)" <ji...@apache.org> on 2007/08/04 16:23:54 UTC
[jira] Closed: (HARMONY-3231) [drlvm][thread] There is a
performance improvement if using "initial-exec" tls model on em64t linux.
[ https://issues.apache.org/jira/browse/HARMONY-3231?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
weldon washburn closed HARMONY-3231.
------------------------------------
Resolution: Fixed
patch has been applied
> [drlvm][thread] There is a performance improvement if using "initial-exec" tls model on em64t linux.
> ----------------------------------------------------------------------------------------------------
>
> Key: HARMONY-3231
> URL: https://issues.apache.org/jira/browse/HARMONY-3231
> Project: Harmony
> Issue Type: Improvement
> Components: DRLVM
> Environment: linux-em64t
> Reporter: Rustem Rafikov
> Assignee: weldon washburn
> Attachments: initial-exec-em64t.diff
>
>
> Hi All,
> The attached patch changes tls model to initial-exec for linux-em64t (instead of general-dynamic by default). This allows avoiding of __tls_addr_get calls to obtain the address of a thread-local variable. Initial-exec can be used when all modules are loaded before a program starts working but may not be loaded at runtime with dlopen().
> The attached patch gives us up to 10% boost on specjbb2005 @ lnx64(and more on thread intensive benchmarks).
> --bwR
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