RFR(xs): 8186402: [TESTBUG] "Balance queues" output expected by test

[sangheon.kim]

Hi Thomas,

Thanks for looking at this.

Sangheon


On 08/22/2017 02:20 AM, Thomas Schatzl wrote:
> Hi,
>
> On Fri, 2017-08-18 at 13:17 -0700, sangheon.kim wrote:
>> Hi all,
>>
>> Could I have some reviews for this tiny change of adding
>> ParallelGCThreads=2 in TestPrintReferences.java?
>>
>> The test is assuming always to have 'Balance queues:' log but it is
>> only generated when the VM did queue balancing. Queue balancing
>> happens when MT process is enabled(with
>> +ParallelRefProcBalancingEnabled) or MT discovery is enabled. And MT
>> discovery is enabled if we have multiple ParallelGCThreads (> 1).
>>
>> Adding explicit thread setting of 'ParallelGCThreads=1' is easiest
>> way to avoid this test failure on limited environments. i.e. machines
>> which determine to use 1 ParallelGCThreads.
>>
>> The test failure log also includes:
>> "[Java HotSpot(TM) 64-Bit Server VM warning: If the number of
>> processors is expected to increase from one, then you should
>> configure the number of parallel GC threads appropriately using
>> -XX:ParallelGCThreads=N"
>>
>> CR: https://bugs.openjdk.java.net/browse/JDK-8186402
>> Webrev: http://cr.openjdk.java.net/~sangheki/8186402/webrev.0/
>> Testing: JPRT
>    looks good.
>
> Thomas
>