RFR: 8242078: G1: Improve concurrent refinement analytics and logging

[Kim Barrett]

> On Apr 14, 2020, at 9:11 AM, Stefan Johansson <stefan.johansson at oracle.com> wrote:
> 
> On 2020-04-14 14:59, Kim Barrett wrote:
>> The LogTarget was to only say the logging selection once, but admittedly that’s not
>> common practice and it probably reads better being explicit, so done.
>> New webrevs:
>> full: https://cr.openjdk.java.net/~kbarrett/8242078/open.02/
> Looks good,
> Stefan
> 
>> incr: https://cr.openjdk.java.net/~kbarrett/8242078/open.02.inc/
>> Testing: local (linux-x64) hs-tier1, which includes TestGCLogMessages.

Thanks.