RFR: 8246272: Make use of GCLogPrecious for G1, Parallel and Serial

[Per Liden]

Looks good!

/Per

On 6/8/20 8:48 PM, Stefan Karlsson wrote:
> Hi all,
> 
> Please review this patch to turn the GC init logging into "precious" 
> logging, so that those lines get dumped into the hs_err file.
> 
> https://cr.openjdk.java.net/~stefank/8246272/webrev.01/
> https://bugs.openjdk.java.net/browse/JDK-8246272
> 
> Example output from a G1 hs_err file:
> 
> GC Precious Log:
>   CPUs: 32 total, 32 available
>   Memory: 125G
>   Large Page Support: Disabled
>   NUMA Support: Disabled
>   Compressed Oops: Enabled (Zero based)
>   Heap Region Size: 16M
>   Heap Min Capacity: 16M
>   Heap Initial Capacity: 2016M
>   Heap Max Capacity: 30688M
>   Pre-touch: Disabled
>   Parallel Workers: 23
>   Concurrent Workers: 6
>   Concurrent Refinement Workers: 23
>   Periodic GC: Disabled
> 
> I've changed the generic GCInitLogger so all GCs get these lines dumped. 
> I've also added the G1 and Parallel specific lines. I can add the 
> Shenandoah and Epsilon specific lines, if it is requested.
> 
> Thanks,
> StefanK