RFR: Log message on ref processing and class unload for mark events

[Roman Kennke]

Am 22.01.2018 um 10:51 schrieb Aleksey Shipilev:
> http://cr.openjdk.java.net/~shade/shenandoah/mark-message/webrev.01/
> 
> Another UX improvement: print marking cycle flavor in the log. Helps to diagnose if failing/slower
> marking cycle was somehow special.
> 
> [14.017s][info][gc] GC(65) Pause Init Mark 0.266ms
> [14.047s][info][gc] GC(65) Concurrent marking (class unload) 900M->961M(1024M) 30.572ms
> [14.053s][info][gc] GC(65) Pause Final Mark (class unload) 5.529ms
> ...
> [14.135s][info][gc] GC(66) Pause Init Mark 0.697ms
> [14.195s][info][gc] GC(66) Concurrent marking (ref process) 869M->927M(1024M) 60.646ms
> [14.196s][info][gc] GC(66) Concurrent precleaning 927M->928M(1024M) 0.431ms
> [14.200s][info][gc] GC(66) Pause Final Mark (ref process) 4.355ms
> ...
> [14.378s][info][gc] GC(67) Pause Init Mark 0.633ms
> [14.453s][info][gc] GC(67) Concurrent marking 911M->988M(1024M) 75.755ms
> [14.456s][info][gc] GC(67) Pause Final Mark 2.735ms
> 
> Testing: hotspot_gc_shenandoah
> 
> Thanks,
> -Aleksey
> 

Very good. Go!

Roman