RFR 8069291: [TESTBUG] Fibonacci test: OutOfMemoryError: unable to create native thread

David Holmes david.holmes at oracle.com
Mon Feb 16 01:56:57 UTC 2015


Hi Dmitry,

Is this test actually that useful? What is it actually testing? It isn't 
a regression test. It isn't even a specific functional test. Seems more 
like a demo than a test.

David

On 14/02/2015 6:11 AM, Dmitry Dmitriev wrote:
> Hello!
>
>
>
> Please review this fix for JDK-8069291. Unfortunately, the bug report isn't visible outside Oracle.
>
>
> This test calculates Fibonacci numbers "recursively" via threads and compares the result with the classical calculation. I correct out-of-memory error which sometimes occurred on 32 bit systems. I changed how the recursive threads are created. Now left & right branches creates separately and thread wait one branch to finish before creating thread for another branch.
>
>
> As part of the fixing the OOM issue I am moving the test to OpenJDK.
>
>
> Open webrev: http://cr.openjdk.java.net/~ctornqvi/webrev/8069291/webrev.00/
>
>
> JBS bug: https://bugs.openjdk.java.net/browse/JDK-8069291
>
>
> I run this test on all main platforms; Linux x64, Linux x32, Win x32, Win x64, MacOS x64, Solaris x64, Solaris Sparc64
>
>
> Thanks,
> Dmitry
>


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