RFR: 8027423: Parallel compact GC class unloading measurement includes symbol and string table time (original) (raw)
Stefan Karlsson stefan.karlsson at oracle.com
Mon Mar 14 14:22:50 UTC 2016
- Previous message (by thread): RFR(xs): 8062506: Java GCCause enum is out of sync with C++ GCCause enum
- Next message (by thread): RFR: 8027423: Parallel compact GC class unloading measurement includes symbol and string table time
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
Hi all,
Please review this patch to get more detailed phase measurements of the unloading phases of the parallel and serial collectors. It mimics the way CMS reports the unloading phase. G1 parallelizes the unloading phase, so it is slightly different.
http://cr.openjdk.java.net/~stefank/8027423/webrev.00/ https://bugs.openjdk.java.net/browse/JDK-8027423
Example of the output that you get with -Xlog:gc=debug: [2.257s][debug][gc] GC(45) Class Unloading (2.256s, 2.257s) 1.669ms [2.258s][debug][gc] GC(45) Scrub String Table (2.257s, 2.258s) 0.412ms [2.259s][debug][gc] GC(45) Scrub Symbol Table (2.258s, 2.259s) 1.027ms [2.292s][info ][gc] GC(45) Pause Full (System.gc()) 80M->2M(98M) (2.248s, 2.292s) 44.631ms
Thanks, StefanK
- Previous message (by thread): RFR(xs): 8062506: Java GCCause enum is out of sync with C++ GCCause enum
- Next message (by thread): RFR: 8027423: Parallel compact GC class unloading measurement includes symbol and string table time
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]