RFR 8080232: Eagerly promote objects in nmethod to reduce scanning in ParNew

Carsten Varming cvarming at twitter.com
Mon Feb 15 20:53:15 UTC 2016


Dear GC members,

I would like to contribute a fix for JDK-8080232. The bug is marked as
resolved because it was withdrawn. The fix is simple, so I would like to
reopen the ticket. At Twitter we have seen the time to fix relocations
after a ParNew cycle drop by three to four orders of magnitude with this
patch.

I have put a webrev here:
http://cr.openjdk.java.net/~cvarming/prune_scavengable_nmethods/0/webrev/

I will need a sponsor.

Carsten
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