RFR(S): 6818524: G1: use ergonomic resizing of PLABs
Vladimir Sitnikov
sitnikov.vladimir at gmail.com
Wed Aug 8 20:51:17 UTC 2012
2012/8/8 Kirk Pepperdine <kirk at kodewerk.com>
> Hi,
>
> I'm looking at this record.
>
> 919.673: [GC-- [PSYoungGen: 643582K->643582K(648704K)]
> 1905561K->2004508K(2014080K), 0.0319900 secs]
>
> Are you sure this is a G1 gc log?
Those "GC--" stand for promotion failure case (VM have recognized that is
was very likely that tenured would be flooded by scavenge). Please, refer
to
http://hg.openjdk.java.net/jdk6/jdk6/hotspot/file/a541ca8fa0e3/src/share/vm/gc_implementation/parallelScavenge/psScavenge.cpp
445 promotion_failure_occurred = promotion_failed();
446 if (promotion_failure_occurred) {
447 clean_up_failed_promotion();
448 if (PrintGC) {
449 gclog_or_tty->print("--");
450 }
451 }
--
Regards,
Vladimir Sitnikov
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