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  1. JDK
  2. JDK-8151674

STW phases at Concurrent GC should count in PerfCounter

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    • gc
    • b115
    • Fix failed

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      http://mail.openjdk.java.net/pipermail/hotspot-gc-dev/2016-March/016774.html
      http://mail.openjdk.java.net/pipermail/hotspot-gc-dev/2016-March/016896.html

      I wonder that STW phases (Remark and Cleanup) at G1 are not counted in jstat FGC column.
      For example, Initial Mark and Remark at CMS are counted as FGC.
      We discussed on hotspot-gc-dev for this issue, and I proposed to add new PerfCounter for CGC STW phases.

      We can override jstat_options if we want to watch CGC counters.
      Also we can check it through PerfCounter.print jcmd.

      * hotspot: http://cr.openjdk.java.net/~ysuenaga/JDK-6291341/poc-2/hotspot/
      * jdk: http://cr.openjdk.java.net/~ysuenaga/JDK-6291341/poc-2/jdk/

      For compatibility, this patch works the same as the current by default.
      If you set -XX:+EnableConcGCPerfCounter, CGC counter will work fine.
      (I want to set +EnableConcGCPerfCounter by default)

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. JDK-8153302 [BACKOUT] STW phases at Concurrent GC should count in PerfCounter

          • P2 - Crashes, loss of data, severe memory leak.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8153283 Multiple jstat failures in hs nightly

          • P2 - Crashes, loss of data, severe memory leak.
          • Closed

          Enhancement - null JDK-8153333 [REDO] STW phases at Concurrent GC should count in PerfCounter

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Resolved

          Sub-task - The sub-task of the issue JDK-8164431 Release Note: New PerfCounters for STW Phases on Concurrent GC Are Available

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. JDK-6291341 jstat: FGC counter confusing when CMS GC is used

          • P3 - Major loss of function.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8153280 sun/tools/jstatd/TestJstatd* tests fail with java.io.IOException: Stream closed and missing headline

          • P2 - Crashes, loss of data, severe memory leak.
          • Closed

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              ysuenaga Yasumasa Suenaga
              ysuenaga Yasumasa Suenaga
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