RFR 8030847: java/lang/management/ThreadMXBean/ThreadBlockedCount.java fails intermittently again

[Jaroslav Bachorik]

On 14.1.2014 12:38, David Holmes wrote:
> On 14/01/2014 9:25 PM, Jaroslav Bachorik wrote:
>> Please, could I have a review of this change?
>>
>> It really is pretty simple and won't take much time to review.
>
> Sorry this slipped past me :)
>
> Changes look fine. Could you just expand on this comment:
>
>   55         // warmup
>
> to say:
>
> // warmup - ensure all classes loaded and initialized etc to
> //          avoid unintended locking and blocking in the VM

Will do!

-JB-

>
> Thanks,
> David
>
>> Thanks,
>>
>> -JB-
>>
>> On 9.1.2014 14:35, Jaroslav Bachorik wrote:
>>> Hi,
>>>
>>> thanks do David and Staffan it was possible to pinpoint the contention
>>> to the static initializaton and classloading.
>>>
>>> David suggested running the test routine twice to exercise any
>>> initialization during the first run and performs the checks only for the
>>> results of the second run.
>>>
>>> The test is using Phaser for synchronization. All the potentially
>>> blocking code (System.out.println(), Thread.currentThread(), etc.) was
>>> removed from the tested thread.
>>>
>>> The webrev is available at
>>> http://cr.openjdk.java.net/~jbachorik/8030847/webrev.01
>>>
>>> Thanks,
>>>
>>> -JB-
>>