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Date: Tue, 20 Feb 2007 01:42:05 -0800 (PST)
From: "Elena Semukhina (JIRA)" <jira@apache.org>
To: commits@harmony.apache.org
Subject: [jira] Updated: (HARMONY-3044) [drlvm][thread manager] smoke test
 gc.LOS hangs from time to time on SUSE9 Linux x86 and x86_64
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     [ https://issues.apache.org/jira/browse/HARMONY-3044?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Elena Semukhina updated HARMONY-3044:
-------------------------------------

    Attachment: H-3044_gc_MultiThreads_hang.txt

I tried the patch and was happy to see that both gc.LOS and gc.MultiThreads passed hundreds of times on linux x86 and x86_64 in default mode. 

Then I tried to run them in OPT and didn't see any problems on x86 for now (tests still run).

On x86_64 gc.LOS is now running its 120th iteration while gc.MultiThreads hung after it finished its 27th:
.............................................................................
92% (387894448/419430400),,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
PASSED

Possibly it is not OPT specific but seems to be x86_64 specific. I attached the stack traces; please look at them.

> [drlvm][thread manager] smoke test gc.LOS hangs from time to time on SUSE9 Linux x86 and x86_64
> -----------------------------------------------------------------------------------------------
>
>                 Key: HARMONY-3044
>                 URL: https://issues.apache.org/jira/browse/HARMONY-3044
>             Project: Harmony
>          Issue Type: Bug
>          Components: DRLVM
>            Reporter: Elena Semukhina
>         Assigned To: Gregory Shimansky
>         Attachments: H-3044_gc_MultiThreads_hang.txt, monitor_wait_impl-reset-suspend_disable_count-while-blocking-on-hymutex_lock.patch, x86_64_info_thr.txt
>
>
> I saw the hangs on 2xXeon machines in JIT mode.
> To reproduce the hang please run the test iteratively as follows:
> while true; do $DRLVM -cp <classpath> gc.LOS; echo $i; i=$[i+1]; done &
> It usually needs no more than 100 iterations to hang.

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