[15] RFR 8236878: Use atomic instruction to update StringDedupTable's entries and entries_removed counters

[Zhengyu Gu]

Submit test also passed.

May I get a second review?

Thanks,

-Zhengyu

On 1/13/20 9:06 AM, Roman Kennke wrote:
> OK.
> 
> Thanks,
> Roman
> 
> 
>>
>> Please review this small change that uses atomic operations to update
>> StringDedupTable's entries and entries_removed counter.
>>
>> This is *not* a correctness fix or performance enhancement, but for
>> Shenandoah GC to move StringDedupTable cleanup task into concurrent
>> phase, while holding StringDedupTable_lock.
>>
>> Bug: https://bugs.openjdk.java.net/browse/JDK-8236878
>> Webrev: http://cr.openjdk.java.net/~zgu/JDK-8236878/webrev.00/index.html
>>
>> Test:
>>    hotspot_gc (fastdebug and release) on x86_64 Linux
>>    Submit test in progress.
>>
>> Thanks,
>>
>> -Zhengyu
>>
>