RFR (S): 8066566: Refactor ParNewGeneration to contain ParNewTracer

[Marcus Larsson]

Hi Erik,

On 06/12/14 10:57, Erik Helin wrote:
> Hi Marcus,
>
> On 2014-12-04 13:05, Marcus Larsson wrote:
>> Hi,
>>
>> I would like reviews for the following small patch.
>>
>> Like the bug description says, the ParNewTracer is stack-allocated
>> during ParNewGeneration::collect(), forcing us to send the tracer as an
>> argument to functions that might need it. This patch moves the tracer,
>> and makes it a field in ParNewGeneration instead.
>>
>> The change includes adding a getter for this field, even though it is
>> not used, however, future changes adding PLAB tracing [1] will require
>> this.
>>
>> Webrev:
>> http://cr.openjdk.java.net/~mlarsson/8066566/webrev.00/
>
> parNewGeneration.hpp
> +  ParNewTracer& gc_tracer() {
> +    return _gc_tracer;
> +  }
> +
>
> Can this getter return a const ParNewTracer* instead? I believe most 
> of the methods on ParNewTracer should be const.

Done.

Incremental:
http://cr.openjdk.java.net/~mlarsson/8066566/webrev.00-01/

New webrev:
http://cr.openjdk.java.net/~mlarsson/8066566/webrev.01/

Thanks for looking at this!
Marcus

>
> Thanks,
> Erik
>
>> Bug:
>> https://bugs.openjdk.java.net/browse/JDK-8066566
>>
>> Testing:
>> jprt
>>
>> Thanks,
>> Marcus
>>
>> [1]: https://bugs.openjdk.java.net/browse/JDK-8055845