Hi Stefan,
Looks good to me. Nit: Could you please modify the copyright year? And
don't we have to add the copyright message to the new file
ZExternalBitMap.java ?
Thanks!
Jini.
On 2/11/2019 7:25 PM, Stefan Karlsson wrote:
Hi all,
Please review this patch to implement a discontiuous bitmap for ZGC in
the SA.
http://cr.openjdk.java.net/~stefank/8218746/webrev.01/
https://bugs.openjdk.java.net/browse/JDK-8218746
ZGC uses a 16TB virtual memory address range, so the normal scheme to
map a bitmap over the entire address range uses too much memory. This
patch lazily creates smaller bitmaps per ZPage, when at() or atPut() is
called.
This patch builds upon JDK-8218743.
Tested with serviceability/sa and manually running Reverse Object
Analysis in the SA.
Thanks,
StefanK
