RFR (S): 8076995: gc/ergonomics/TestDynamicNumberOfGCThreads.java failed with java.lang.RuntimeException: 'new_active_workers' missing from stdout/stderr

Derek White derek.white at oracle.com
Sat Apr 25 13:52:19 UTC 2015


Thanks Jon!

On 4/24/15 1:41 PM, Jon Masamitsu wrote:
> Derek,
>
> Fix and test look good.  Those parts are Reviewed.
>
> I don't know whether the TEST.group changes are correct or not.
> Someone who understand the rational for inclusion/exclusion should
> review those.
>
> Jon
>
>
> On 4/23/2015 2:55 PM, Derek White wrote:
>> 2nd webrev:
>>
>> Please review this fix for:
>> https://bugs.openjdk.java.net/browse/JDK-8076995
>> Webrev:
>> http://cr.openjdk.java.net/~drwhite/8076995/webrev.01/
>>
>> Changes:
>>
>> - Updated TEST.groups to only run this test if G1, CMS, and Parallel 
>> GCs are enabled.
>> - Also searched for similar GC tests that specify a GC to use and 
>> added to TESTS.groups:
>>
>>   * gc/TestSmallHeap.java
>>   * gc/logging/TestGCId.java
>>   * gc/TestCardTablePageCommits.java
>>   * gc/arguments/TestParallelHeapSizeFlags.java
>>
>> - Responded to comments below.
>>
>> Did jprt run. Saw timeout, not sure if real or if it's one of those 
>> "embedded tests don't quite fit" errors.
>>    Fail/kill comment:  Targets failed.  Target 
>> linux_armvfpsflt_2.6-productEmb-c2-hotspot_servertest timedout.
>>
>>  - Derek
>>
>> On 4/21/15 1:23 PM, Jon Masamitsu wrote:
>>> Derek,
>>>
>>> Thanks for fixing this.
>>>
>>> Fix looks good.
>>>
>>> What do you think about always making testDynamicNumberOfGCThread()
>>> check for the uniprocessor case (as opposed to passing in a flag to 
>>> explicitly
>>> check it)?
>>>
>>> ForceDynamicNumberOfGCThreads is a diagnostic flag
>>>
>>>   diagnostic(bool, ForceDynamicNumberOfGCThreads, 
>>> false,                    \
>>>           "Force dynamic selection of the number of 
>>> "                       \
>>>           "parallel threads parallel gc will use to aid 
>>> debugging")         \
>>>
>>> so I think you need +UnlockDiagnosticVMOptions.
>>>
>>> Jon
>>>
>>> On 04/21/2015 06:53 AM, Derek White wrote:
>>>> Hi All,
>>>>
>>>> Please review this fix for:
>>>> https://bugs.openjdk.java.net/browse/JDK-8076995
>>>> Webrev:
>>>> http://cr.openjdk.java.net/~drwhite/8076995/webrev.00/
>>>>
>>>> Summary:
>>>>
>>>> Part 1 is a test bug that tries to run G1 on embedded SE builds. Not changed by this webrev.
>>>>
>>>> Part two is assertion failure that is being fixed by this webrev.
>>>>
>>>> This is a fix for bug that triggered an assert when running CMS on very
>>>> small machines - 1 core x86, or 1-4 core ARM. This may seem unlikely but
>>>>   can easily happen when running virtual instances.
>>>>
>>>> Failure stack traces also show bug crashing printing a stack trace, but this is being tracked in another bug.
>>>>
>>>> Thanks,
>>>>
>>>> - Derek
>>>>
>>>>
>>>>
>>>
>>
>

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