JDK-6291341: jstat: FGC counter confusing when CMS GC is used (original) (raw)

Staffan Larsen staffan.larsen at oracle.com
Wed Mar 9 07:13:13 UTC 2016

The jdk changes look good to me. Jon, if you integrate the JVM changes you can do the jdk changes at the same time in the hs-rt repo.

Thanks, /Staffan

On 8 mars 2016, at 23:08, Jon Masamitsu <jon.masamitsu at oracle.com> wrote:

Yasumasa, We're discussing this. What would the result be if the GC team made the JVM changes that you want to contribute. Meaning, without the jdk changes, will jstat continue to work as it currently does? Would the changes in the JVM be useful to you without the jstat changes? By the JVM changes, I mean the changes for the counters. The reason I ask is that the GC team does not own jstat. If I can integrate the JVM changes without the jstat changes, it makes it a little simpler. Jon

On 3/8/2016 6:38 AM, Yasumasa Suenaga wrote: Hi all,

I discussed about FullGC counter for Concurrent GC: http://mail.openjdk.java.net/pipermail/hotspot-gc-dev/2016-March/016774.html I found same issue on JBS: JDK-6291341: jstat: FGC counter confusing when CMS GC is used JDK-6291341 was closed with Cannot Reproduce. However, I showed cause of this issue in above thread. I uploaded patches for this issue: hotspot:http://cr.openjdk.java.net/~ysuenaga/JDK-6291341/poc/hotspot/ jdk:http://cr.openjdk.java.net/~ysuenaga/JDK-6291341/poc/jdk/ JDK webrev includes testcase update. All tests for jstat work fine.

Should I work for it as new issue? Or should I reopen JDK-6291341? I cannot access JPRT. So I need a sponsor. Thanks, Yasumasa

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