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 16:21:38 UTC 2016
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Thanks, Mikael.
StefanK
On 2016-03-14 16:39, Mikael Gerdin wrote:
Hi Stefan,
On 2016-03-14 15:22, Stefan Karlsson wrote: 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/ Looks good. /Mikael 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
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