Request for Review (xs) - 8155966: Assertion failures when -XX:+UseParallelGC -XX:ParallelGCThreads=1

[Jon Masamitsu]

Derek,

Thanks.

Jon

On 5/3/2016 4:16 PM, Derek White wrote:
> On 5/3/16 6:51 PM, Jon Masamitsu wrote:
>> 8155966: Assertion failures when -XX:+UseParallelGC 
>> -XX:ParallelGCThreads=1
>> https://bugs.openjdk.java.net/browse/JDK-8155966
>>
>> The change for 8150994 change the stealing task to the main task for 
>> compaction.
>> Mistakenly left in the stealing task definition was code to skip the 
>> stealing task
>> if there was only 1 GC thread (no other GC thread from which to steal).
>>
>> The code changes are an improved assertion message and removal of the 
>> code
>> from the stealing tasks for the special case of 1 GC worker.
>>
>>
>> http://cr.openjdk.java.net/~jmasa/8155966/webrev.00/
>>
>> Failure was reproducible with GCOld and ran GCOld with
>> ParallelGCThreads=1 and default number of GC threads for
>> testing.
> Hi Jon,
>
> The fix looks good.
>
>  - Derek