JDK-6916625 : Use compressed klass pointer when compressed oops can not be used
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: runtime
  • Affected Version: hs17,9,10
  • Priority: P4
  • Status: Closed
  • Resolution: Won't Fix
  • OS: generic
  • CPU: generic
  • Submitted: 2010-01-13
  • Updated: 2017-12-04
  • Resolved: 2017-12-04
Related Reports
Relates :  
JDK-7054512 - NPG: Compress class pointers after perm gen removal
Relates :  
JDK-6964458 - Reimplement class meta-data storage to use native memory
Description
When java heap is large and compressed oops can not be used we still can use compressed klass pointer if Perm Gen size < 4Gb.
I tried it some time ago but did not finish because it requires a lot of changes, almost duplication of code for compressed oops.
We can use this bug to implement compressed klass pointers when 6964458 is done.
Comments
This is not on our list of current priorities. If there are additional specific customer requirements, we will consider reopening this issue. Closing as WNF.
04-12-2017
Hi, could somebody on the runtime team please look and decide if this issue is still relevant and/or we want (or can) take care of it? Thank you! Zoltan
16-02-2017