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

Bengt Rutisson bengt.rutisson at oracle.com
Tue Apr 28 08:43:36 UTC 2015


On 28/04/15 00:14, Derek White wrote:
> 3rd webrev:
>
> Please review this fix for:
> https://bugs.openjdk.java.net/browse/JDK-8076995
> Webrev:
> http://cr.openjdk.java.net/~drwhite/8076995/webrev.02/

The link above actually goes to webrev.01, but going to webrev.02 works 
and that change looks good to me. Reviewed.
>
> Changes:
>
> - Updated TEST.groups to only run this test if G1, CMS, and Parallel 
> GCs are enabled. Removed code from webrev.01 that also updated other 
> GC tests. This is now tracked as a separate bug 
> https://bugs.openjdk.java.net/browse/JDK-8078673

Thanks for creating this bug to track the other tests that need to be 
updated! Can you add a comment to JDK-8078673 that lists the tests that 
you have identified as problematic?

Thanks,
Bengt

>
> FYI also created separate bug to track the processor count issues: 
> https://bugs.openjdk.java.net/browse/JDK-8078703
>
> Thanks!
>
>  - Derek
>
> On 4/27/15 4:04 AM, Bengt Rutisson wrote:
>>
>> Hi Derek,
>>
>> On 2015-04-23 23:55, 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.
>>
>> OK.
>>
>>> - 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
>>>
>>
>> I think I would prefer this as a separate change. I'm not very good 
>> with TEST.groups, but it looks like your suggested changes are 
>> correct. However, I would prefer the get more attention to that 
>> change and thus it would be better to send it out as a separate review.
>>
>> Thanks,
>> Bengt
>>
>>> - 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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